ORCID Profile
0000-0001-7548-1521
Current Organisations
University of Technology Sydney
,
Universitas Diponegoro
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Publisher: Wiley
Date: 20-05-2008
DOI: 10.1002/PS.1602
Abstract: Integrated pest management (IPM) technology has been disseminated since 1989 in Indonesia to cut down pesticide use, but the adoption and diffusion of the technology are still debated. This study aims to estimate the models of demand for pesticides and to analyse the impact of IPM technology on pesticide use. Aggregate cross-section time series data from 1990-1998 are used. The results show that IPM technology reduces the use of pesticides by improving the process of rice production, such that pesticides are more efficiently used. In this case, the IPM technology is not a pest control technique. CONCLUSION There is an indication that IPM technology has been adopted by farmers. This is evidence that the IPM programme in Indonesia was successful in this area.
Publisher: Emerald
Date: 10-08-2015
Abstract: – The purpose of this paper is to analyse aspects of technological change in rice agriculture, related to adoption of the Green Revolution (GR) in Indonesia. Rice production is selected in this study because it plays an important role in the development of Indonesian economy. Particular attention is paid to the use of agrochemicals that has potentials of contaminating the environment. – The paper uses an econometric model to investigate the impact of different technologies and policies related to rice production. Production function technology that enables non-neutrality of input use is the underlying concept of this paper. Types of land and transformation in policies related to rice production were accounted for to determine biased technological change. National-wide data were compiled from the Indonesian Bureau of Statistics. – The results show that rice agriculture underwent technological progress with biased technological change. The technological change was capital- and labour-saving, and agrochemical-augmenting. Production system in wetland led to technological change less capital- and labour-intensive, whilst the GR led to technological change more labour-saving and more agrochemical-augmenting. – This study only pays attention to environmentally detrimental inputs as a cause of externalities. This is a not full representation of real environmental consequences. In some studies on environmental degradation associated with intensive agricultural practices, however, there are other factors that can degrade the environment, such as soil erosion and soil compaction resulting from certain agricultural practices, and deforestation resulting from agricultural expansion. These are also important environmental impacts. The author expects that these factors are interesting and challenging subjects to be modelled in future research on sustainability of agricultural productivity growth, both theoretically and empirically. – Increase in use of agrochemicals was strongly GR linked. Moving from the GR towards more environmentally friendly policy was a wise step to reach sustainable rice production. After the GR, an act that removed pesticide subsidies and disseminated environmentally friendly technology, called integrated pest management was able to reduce the intensity of agrochemical use in rice agriculture. Further actions to support environmentally friendly policy could be the use of bio-agents such as bio-fertilisers and bio-pesticides. Enhancing farmers’ knowledge on the environmental issues and engaging farmers as a part of agro-ecosystem would synergise the actions. – This study uses the concept of biased technological change, estimated econometrically using national-level data. The production function used in this analysis enables non-neutrality of agrochemical use. When the result significantly shows the agrochemical-augmenting technological change, it is a convincing evidence, not just by accident, that the GR really led to environmental problem.
Publisher: American Chemical Society (ACS)
Date: 12-10-2023
Publisher: American Association for the Advancement of Science (AAAS)
Date: 11-01-2023
Abstract: 3D interconnected structures can be made with molecular precision or with micrometer size. However, there is no strategy to synthesize 3D structures with dimensions on the scale of tens of nanometers, where many unique properties exist. Here, we bridge this gap by building up nanosized gold cores and nickel branches that are directly connected to create hierarchical nanostructures. The key to this approach is combining cubic crystal–structured cores with hexagonal crystal–structured branches in multiple steps. The dimensions and 3D morphology can be controlled by tuning at each synthetic step. These materials have high surface area, high conductivity, and surfaces that can be chemically modified, which are properties that make them ideal electrocatalyst supports. We illustrate the effectiveness of the 3D nanostructures as electrocatalyst supports by coating with nickel-iron oxyhydroxide to achieve high activity and stability for oxygen evolution reaction. This work introduces a synthetic concept to produce a new type of high-performing electrocatalyst support.
Publisher: Informa UK Limited
Date: 03-05-2020
Publisher: Informa UK Limited
Date: 05-01-2021
Publisher: Universitas Padjadjaran
Date: 07-07-2013
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9CC08972A
Abstract: Zero valent iron core–iron oxide shell nanoparticles coated with a multi-phosphonate brush co-polymer are shown to be small and effective magnetic nanoparticle imaging tracers.
Publisher: MDPI AG
Date: 14-09-2023
Publisher: Emerald
Date: 11-03-2026
Abstract: The purpose of this paper is to measure the environmental performance of intensive farming and estimate agrochemical waste in physical and monetary terms. The intensive farming provides adverse impacts including health and environmental quality associated with the use of agrochemicals. This study uses a theory of environmental efficiency that measures how efficient the farm uses agrochemical inputs. The efficiency was estimated using a set of farm-level data of intensive farming that use agrochemicals. Data were compiled from a survey of randomly selected 240 farmers who operated intensive farming in three regions of Java in 2014. The results show that the performance of intensive farming was low. This condition caused agrochemical waste leading to the externality. Taking the external costs into account resulted in the improvement in efficiency of agrochemicals. The actual level of agrochemicals was about a hundred times higher than the most efficient level. This study is beyond the exogenous external costs. There is a need for a further comprehensive study to include more exogenous external costs associated with agrochemicals to have the potential value of such costs and the most socially efficient use of agrochemicals. The long-term effects of external cost to the environment and socio-economic livelihood of the farmers and other communities are considerable. Advocating for alternatives to decrease the use of detrimental agro-inputs, in the long run, will provide sound quality of the environment. Socially, both producers and consumers get the environmental and health benefits. To reduce the agrochemical waste that caused environmental problems, a policy should be formulated to make farming more efficient, particularly for agrochemical use. It can be done by introducing agronomic technologies and enhancing farmers’ knowledge on environmentally friendly agriculture. Environmental efficiency is able to estimate the quantity of agrochemical waste. The waste is a kind of non-point source pollution whose source and quantity are very difficult to identify and measure. As there are many definitions and measurement of environmental performance, this concept of environmental efficiency can be one of the alternatives.
Publisher: American Chemical Society (ACS)
Date: 18-11-2015
Abstract: Bimetallic nanostructures show exciting potential as materials for effective photothermal hyperthermia therapy. We report the seed-mediated synthesis of palladium-gold (Pd-Au) nanostructures containing multiple gold nanocrystals on highly branched palladium seeds. The nanostructures were synthesized via the addition of a gold precursor to a palladium seed solution in the presence of oleylamine, which acts as both a reducing and a stabilizing agent. The interaction and the electronic coupling between gold nanocrystals and between palladium and gold broadened and red-shifted the localized surface plasmon resonance absorption maximum of the gold nanocrystals into the near-infrared region, to give enhanced suitability for photothermal hyperthermia therapy. Pd-Au heterostructures irradiated with an 808 nm laser light caused destruction of HeLa cancer cells in vitro, as well as complete destruction of tumor xenographs in mouse models in vivo for effective photothermal hyperthermia.
Publisher: Wiley
Date: 26-03-2019
Abstract: Branched nanoparticles are one of the most promising nanoparticle catalysts as their branch sizes and surfaces can be tuned to enable both high activity and stability. Understanding how the crystallinity and surface facets of branched nanoparticles affect their catalytic performance is vital for further catalyst development. In this work, a synthesis is developed to form highly branched ruthenium (Ru) nanoparticles with control of crystallinity. It is shown that faceted Ru branched nanoparticles have improved stability and activity in the oxygen evolution reaction (OER) compared with polycrystalline Ru nanoparticles. This work achieves a low 180 mV overpotential at 10 mA cm
Publisher: American Chemical Society (ACS)
Date: 02-10-2018
DOI: 10.1021/JACS.8B09402
Abstract: A major synthetic challenge is to make metal nanoparticles with nanosized branches and well-defined facets for high-performance catalysts. Herein, we introduce a mechanism that uses the growth of hexagonal crystal structured branches off cubic crystal structured core nanoparticles. We control the growth to form Pd-core Ru-branch nanoparticles that have nanosized branches with low index Ru facets. We demonstrate that the branched and faceted structural features of the Pd-Ru nanoparticles retain high catalytic activity while also achieving high stability for the oxygen evolution reaction.
Publisher: Universitas Muhammadiyah Surakarta
Date: 09-01-2020
Abstract: Vegetable crops play an important role in the Indonesian economy through their multiplier effect in farm household livelihoods. This paper analyses factors that determine farmers to commercialize vegetable-based agribusiness ventures. Intensive vegetable farming, as a part of agricultural commercialization, is considered a technological package that is more profitable, and high input and labor intensive compared to rice and other cereal crops. The study employed a qualitative approach to describe the farmers’ motivation. Data for this study were compiled from surveys conducted in 2014 by interviewing 357 farm households, which were located in four major vegetable producing regions of East Java and Bali, Indonesia. Qualitative surveys and descriptive statistics approaches were used to support the quantitative regression models. Results show that farmers were more motivated to commercialize because of economic and agro-ecological reasons. An enabling agribusiness environment such as access to good produce markets, credit, as well as market information and support systems access are expected to be other driving factors boosting commercial vegetable farming and associated steady growth of vegetable production in Indonesia. Vegetable markets should be emphasized in the potential vegetable producing regions of Indonesia.
Publisher: Emerald
Date: 12-03-2018
Abstract: The purpose of this paper is to analyse factors affecting the use of pesticides in intensive vegetable farming in Java, Indonesia. Evaluating such factors is expected to provide appropriate policies to reduce pesticides, and eventually, mitigates the adverse impacts of pesticides on human health and the environment. Data were compiled from a farm survey of randomly selected 240 vegetable farmers in three regions of Java in 2014. A concept of economic threshold was employed to analyse the pesticide use determinants, which were estimated using econometric models. Factors leading to the increase in the application of pesticides were the number of observed insect pests, prices of vegetables, use of local varieties, and use of mixed pesticides. Conversely, factors lowering the use of pesticides were the number of observed diseases, the cost of pesticides, and area planted to vegetables. The most important factor in influencing pesticide use was farmers’ perception on the correct prediction of yield losses associated with pests and diseases. The s le for this research is somewhat low and the analysis was based on one-year data of the quantity of pesticides in a formulation. The use of pesticides can be reduced by training farmers on crop protection practices, which provide correct information on pests and diseases. Policies related to the price of pesticides would be ineffective, as farmers still highly relied on pesticides. These findings will be useful for reducing the use of pesticides in intensive vegetable farming in Indonesia, and in tropical countries in general. Pesticides have two opposite properties: to increase income on the one side and to cause devastation of life on the other side. Because pesticides are generally less selectively toxic than would be desired, non-targets including humans and the environment must be protected from contamination by these agrochemicals. This study found the most important determinants for reducing pesticide exposures in Indonesian intensive farming.
Publisher: Future Medicine Ltd
Date: 03-2020
Abstract: Nanoparticle (NP)-based magnetic contrast agents have opened the potential for MRI to be used for early diagnosis of Alzheimer’s disease (AD). This article aims to review the current progress of research in this field. A comprehensive literature search was performed based on PubMed, Medline, EMBASE, PsychINFO and Scopus databases using the following terms: ‘Alzheimer’s disease’ AND ‘nanoparticles’ AND ‘Magnetic Resonance Imaging.’ 33 studies were included that described the development and utility of various NPs for AD imaging, including their coating, functionalization, MRI relaxivity, toxicity and bioavailability. NPs show immense promise for neuroimaging, due to superior relaxivity and biocompatibility compared with currently available imaging agents. Consistent reporting is imperative for further progress in this field.
Publisher: Emerald
Date: 04-03-2019
DOI: 10.1108/JEEE-06-2017-0046
Abstract: This paper aims to analyse a simultaneous role of micro-credit in intensive farming to improve rural prosperity and to determine factors affecting farmers to access micro-credit and to adopt technologies. This paper uses a concept of technological change as the underlying theory. The analysis is conducted using structural equation modelling based on data compiled from a survey that interviewed 220 of farm-households. S les of the study were randomly selected from chili farming community in three regions of Java in 2013-2014. The results show that micro-credit provides positive direct and indirect impacts on rural prosperity. The indirect effect of micro-credit was due to a mediation of technology adoption. Farmers’ personalities and agribusiness environment determined farmers’ decision to access micro-credit and to adopt the technology. Policymakers should introduce more advanced technology and provide credit facilities at the same time to ensure technology adoption and welfare improvement of the community. Using structural equation modelling enables analysis of simultaneous regression models. Along with technology here, micro-credit played roles as catalyst and reagent in improving rural livelihood.
Publisher: STIE Perbanas Surabaya
Date: 16-11-2013
Publisher: Emerald
Date: 09-10-2019
DOI: 10.1108/IJPPM-11-2018-0382
Abstract: The purpose of this paper is to analyse the distribution channels of vegetable sectors in Indonesia, its economic impact on the performance of vegetable sales and the factors affecting marketing channels selected by producers. The study employed qualitative and quantitative methods. A market survey was qualitatively conducted at producer, intermediary, wholesaler, hotel and food processing company as well as retailer levels. Producer survey was quantitatively conducted at the farm level, by interviewing 556 randomly selected farm households. Structural equation modelling was employed to accomplish the objectives of the study. Marketing channels for vegetables in Indonesia was complex and relatively long. Farmers decided to select particular channels because of business circumstance and their knowledge. Distance and gentleman’s agreement with traders limited farmers to choose the desirable marketing channel. Marketing channels affect business performance in terms of high sales and profit. This study only pays attention to the supply side of vegetables. The effect of marketing channels also encumbers the consumers, which are beyond this study. Other studies are expected to highlight the consumer side. This study focused on smallholder agribusiness players. This study uses two surveys as data sources: market survey and producer survey. The market survey serves as vital information to design producer surveys.
Publisher: American Physical Society (APS)
Date: 27-07-2021
Publisher: University of Trunojoyo Madura
Date: 05-2023
DOI: 10.21107/AGRIEKONOMIKA.V12I1.17031
Abstract: This paper analyses the implementation of a sustainable food reserve program that empowers the community by mitigating the adverse impacts of malnutrition in Indonesia. This paper adopted an actor- and institution-centered communication approach to analyze the stakeholders, directly and indirectly, engaged in implementing the program. East Java province was selected as the s le of the study. Results of the analysis show that the communications of actors and institutions played dominant roles in the program implementation. In the early implementation stage, the dominant roles of actor and institution communication were strongly required in a new program intervention to guarantee smooth implementation. Government officials played a significant communication role at the provincial level. At the grassroots level, the main actors were women leaders of household prosperity education and farmer leaders. Agricultural extension officials dominantly communicated between provincial and grassroots levels. Institutions must start reducing dominant roles and appointing local cadres to replace and reduce dependency on the institutions.
Publisher: National Institute of Rural Development and Panchayati Raj
Date: 15-03-0100
Publisher: Informa UK Limited
Date: 22-04-2010
Publisher: MDPI AG
Date: 11-12-2051
Abstract: In this work, a pH-responsive drug-carrier based on chitosan-silica nanospheres was developed as a carrier for Albendazole (ABZ), a poorly water-soluble anthelmintic drug. Spherical silica nanoparticles were obtained by Stöber method and further etched to obtain mesoporous particles with sizes ranging from 350 to 400 nm. The specific BET area of nanoparticles increased from 15 m2/g to 150 m2/g for etched silica, which also exhibited a uniform pore size distribution. X-ray powder diffraction showed the presence of amorphous phase of silica and a low-intensity peak attributed to ABZ for the drug-loaded nanoparticles. A uniform layer of chitosan was obtained ranging from 10 to 15 nm in thickness due to the small concentration of chitosan used (0.45 mg of chitosan/mg of SiO2). The in vitro evaluation of hybrid nanoparticles was performed using four cervical cancer cell lines CaSki, HeLa, SiHa and C33A, showing a significant reduction in cell proliferation ( %) after 72 h. Therefore, we confirmed the encapsulation and bioavailability of the drug, which was released in a controlled way, and the presence of chitosan delayed the release, which could be of interest for the development of prolonged release drug delivery systems.
Publisher: Oxford University Press (OUP)
Date: 08-2022
Publisher: Emerald
Date: 19-11-2018
DOI: 10.1108/IJPPM-10-2017-0265
Abstract: The purpose of this paper is to investigate the productivity of rice production by decomposing the growth of total factor productivity (TFP) into four components: technological change, scale effects, technical and allocative efficiencies. This study employed an econometric approach to decompose TFP growth into four components: technological change, technical efficiency, allocative efficiency and scale effect. Unbalanced panel data used in this study were surveyed in 1994, 2004 and 2014 from 360 rice farming operations. The model used the stochastic frontier transcendental logarithm production technology to estimate the technology parameters. The results indicate that the primary sources of TFP growth were technological change and allocative efficiency effects. The contribution of technical efficiency was low because it grew sluggishly. This study has several shortcomings, such as very low R 2 and the insignificant elasticity of labour presented in the findings. Another limitation is the limited time period panel covering long interval, which resulted in unbalanced data. The government should improve productivity growth by allocating more areas for rice production, which enhances the scale and efficiency effects and adjusting the use of capital and material inputs. Extension services should be strengthened to provide farmers with training on improved agronomic technologies. This action will enhance technical efficiency performance and lead to technological progress. As Indonesian population is still growing at a significant rate and the fact that rice is the primary staple food for Indonesian people, the productivity of rice production should increase continually to ensure social security at a national level. The productivity growth is decomposed into four components using the transcendental logarithm production technology based on farm-level data. The measure has not been conducted previously in Indonesia, even in rice-producing countries.
Publisher: MDPI AG
Date: 03-01-2023
DOI: 10.3390/SU15010855
Abstract: Grafting technology is one of the best alternatives to mitigate limiting factors to tomato production (Solanum lycopersicum L). The study aimed to assess grafting combinations of tomato scions and rootstocks of eggplant (S. melongena L.) varieties Gelatik, EG203 line, and Takokak (S. torvum Sw.). Tomato varieties Cervo, Karina, and Timoty were used as scions. The grafted Cervo and Timoty yielded 30% more than non-grafted plants. The results show that grafted tomatoes suppressed disease incidence by more than 20%. The suppression resulted in higher shelf-life capacity and total dissolved solids of more than 10%, red colour intensity (a+) of more than 16%, lycopene content, fruit hardness level of more than 20%, and reduced water content by more than 1%. Vitamin C content was not affected by grafting technology. There is the potential for economic performance in the market for producers and consumers. Grafting technology in tomatoes using eggplants as rootstock could reduce disease incidence and improve agronomic aspects, product quality, and nutrient contents. Different cultivars of scions and rootstock showed different responses. Grafting technology could be disseminated to farmers for economic advantages during the off-season.
Publisher: Universitas Muhammadiyah Surakarta
Date: 29-08-2015
Abstract: Fiscal tariff is considered as personal income tax, collected in advance when adult people who have been staying in Indonesia for more than 183 days go overseas. The magnitude of tariff was sometime much greater than the airfare itself, particularly for international flight to ASEAN member countries. This study aims to measure the impact of elimination of fiscal tariff applied to international flight passenger departing from Indonesia. Potential loss in government revenue from income tax and number of international passengers were analyzed. This study used descriptive and econometric methods. Annual and monthly time series data were collected for publication of the Indonesian Statistical Agency and Central Bank of Indonesia during the periods 2008-2012. The results show that the elimination of fiscal tariff did not affect the government revenue resulting from personal income tax. The impact of tariff elimination was to increase the rate in number of passengers going overseas.
Publisher: American Chemical Society (ACS)
Date: 17-06-2022
DOI: 10.1021/JACS.2C04911
Abstract: Creating high surface area nanocatalysts that contain stacking faults is a promising strategy to improve catalytic activity. Stacking faults can tune the reactivity of the active sites, leading to improved catalytic performance. The formation of branched metal nanoparticles with control of the stacking fault density is synthetically challenging. In this work, we demonstrate that varying the branch width by altering the size of the seed that the branch grows off is an effective method to precisely tune the stacking fault density in branched Ni nanoparticles. A high density of stacking faults across the Ni branches was found to lower the energy barrier for Ni
Publisher: Elsevier BV
Date: 08-2021
Publisher: Springer Science and Business Media LLC
Date: 07-2021
Abstract: This article presents a new set of proton parton distribution functions, ATLASepWZVjet20, produced in an analysis at next-to-next-to-leading order in QCD. The new data sets considered are the measurements of W + and W − boson and Z boson production in association with jets in pp collisions at $$ \\sqrt{s} $$ s = 8 TeV performed by the ATLAS experiment at the LHC with integrated luminosities of 20 . 2 fb − 1 and 19 . 9 fb − 1 , respectively. The analysis also considers the ATLAS measurements of differential W ± and Z boson production at $$ \\sqrt{s} $$ s = 7 TeV with an integrated luminosity of 4 . 6 fb − 1 and deep-inelastic-scattering data from e ± p collisions at the HERA accelerator. An improved determination of the sea-quark densities at high Bjorken x is shown, while confirming a strange-quark density similar in size to the up- and down-sea-quark densities in the range x ≲ 0 . 02 found by previous ATLAS analyses.
Publisher: Universitas Islam Indonesia (Islamic University of Indonesia)
Date: 10-2016
Publisher: Informa UK Limited
Date: 06-2009
Publisher: Informa UK Limited
Date: 04-2007
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8NR03341B
Abstract: Pd–Ru nanoparticles with thin shells and a stable core are shown to improve stability in oxygen evolution reaction catalysis while retaining high activity.
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2NR01897G
Abstract: This review outlines how nanoparticle structure and surface coating can be tailored to generate images with high signal and spatial resolution in vivo , which is crucial for developing magnetic particle imaging tracers for biomedical applications.
Publisher: Wiley
Date: 07-12-2007
Publisher: Emerald
Date: 09-10-2019
DOI: 10.1108/IJPPM-01-2019-0036
Abstract: The purpose of this paper is to evaluate the implications of and assess the economic and sustainable impact of environmentally friendly technological packages introduced into agribusiness players in the centre of chilli-producing regions of Indonesia. This study used a theory of optimisation in production as a fundamental analysis. Producers are assumed to maximise profit by allocating rational amounts of inputs as the components of technological packages. A combination of qualitative and quantitative methods was used. The rate of technology adoption was evaluated, and agribusiness performance was measured using an economic advantage and technical efficiency. Data were compiled using group discussions and in idual surveys. The packages of technologies improved economic and sustainability performance of agribusiness resulting from efficient use of agrochemicals and water resource, and increase the production. Socio-economic and technical factors influenced performance farmers, as agribusiness players responded positively towards the ecological technology packages. The sustainability of agribusiness was indicated by the reduction in agrochemical use and by the efficient use of water irrigation. There are other measures of sustainability, which are beyond this study. Additional studies are expected to fill the gap. Considerable potential exists for broad adoption of these technological packages in Indonesia if they are disseminated effectively and in a close partnership with local extension agencies, farmers’ organisations, local non-governmental organisations and private sectors. This study provides a realistic representation of a current condition because this is an empirical study conducted at the grass-root level. Sustainability of agribusiness practices was achieved with ecological technological packages.
Publisher: Hindawi Limited
Date: 16-11-2022
DOI: 10.1155/2022/7387223
Abstract: The study was aimed at obtaining a vermicelli formulation on a mixture of corn and rice flour, adding carrageenan and its economic analysis. The experiment applied a 2-factorial randomized block design, where factor 1 was a mixture of corn and rice flour (5 levels) and factor 2 was carrageenan concentration (5 levels), repeated three times. The data were analyzed using ANOVA provided in SPSS. When there were significant differences, the analysis proceeded with DMRT at a level of 5% to see differences among treatments. The results show that the higher the corn flour and carrageenan concentration, the higher the vermicelli’s ash and fat content. The formulation produces wet vermicelli with a good appearance. The production of vermicelli uses an extruder method. The selected vermicelli formulation was a mixture of 25% corn flour with 75% rice flour and the addition of 0.6% carrageenan. The characteristics of the wet vermicelli are moisture content of 42.84%, ash content of 0.21% on a wet basis (wb), and fat content of 0.43% wb. The organoleptic test of vermicelli was color 3.9 (liked), aroma 3.6 (liked), texture 2.6 (quite soft), taste 3.7 (liked), and general appearance 3.5 (liked). Economically, making vermicelli made of corn and rice flour is profitable because the R/C ratio value is greater than one, which is 2.27. The resulting wet vermicelli resembles wet noodles, large in size and yellow in color, so it can be recommended as gluten-free noodles, suitable for consumption by people with gluten allergies.
Publisher: Wiley
Date: 15-07-2018
Abstract: Achieving stability with highly active Ru nanoparticles for electrocatalysis is a major challenge for the oxygen evolution reaction. As improved stability of Ru catalysts has been shown for bulk surfaces with low-index facets, there is an opportunity to incorporate these stable facets into Ru nanoparticles. Now, a new solution synthesis is presented in which hexagonal close-packed structured Ru is grown on Au to form nanoparticles with 3D branches. Exposing low-index facets on these 3D branches creates stable reaction kinetics to achieve high activity and the highest stability observed for Ru nanoparticle oxygen evolution reaction catalysts. These design principles provide a synthetic strategy to achieve stable and active electrocatalysts.
Publisher: Wiley
Date: 19-09-2019
Abstract: Magnetic nanoparticles (MNPs) are of high significance in sensing as they provide viable solutions to the enduring challenges related to lower detection limits and nonspecific effects. The rapid expansion in the applications of MNPs creates a need to overview the current state of the field of MNPs for sensing applications. In this review, the trends and concepts in the literature are critically appraised in terms of the opportunities and limitations of MNPs used for the most advanced sensing applications. The latest progress in MNP sensor technologies is overviewed with a focus on MNP structures and properties, as well as the strategies of incorporating these MNPs into devices. By looking at recent synthetic advancements, and the key challenges that face nanoparticle-based sensors, this review aims to outline how to design, synthesize, and use MNPs to make the most effective and sensitive sensors.
Publisher: Informa UK Limited
Date: 03-04-2014
Publisher: Wiley
Date: 14-03-2018
Publisher: Informa UK Limited
Date: 13-12-2018
Publisher: Springer Science and Business Media LLC
Date: 08-2021
DOI: 10.1140/EPJC/S10052-021-09402-3
Abstract: Jet energy scale and resolution measurements with their associated uncertainties are reported for jets using 36–81 fb $$^{-1}$$ - 1 of proton–proton collision data with a centre-of-mass energy of $$\sqrt{s}=13$$ s = 13 $${\text {Te}}{\text {V}}$$ TeV collected by the ATLAS detector at the LHC. Jets are reconstructed using two different input types: topo-clusters formed from energy deposits in calorimeter cells, as well as an algorithmic combination of charged-particle tracks with those topo-clusters, referred to as the ATLAS particle-flow reconstruction method. The anti- $$k_t$$ k t jet algorithm with radius parameter $$R=0.4$$ R = 0.4 is the primary jet definition used for both jet types. This result presents new jet energy scale and resolution measurements in the high pile-up conditions of late LHC Run 2 as well as a full calibration of particle-flow jets in ATLAS. Jets are initially calibrated using a sequence of simulation-based corrections. Next, several in situ techniques are employed to correct for differences between data and simulation and to measure the resolution of jets. The systematic uncertainties in the jet energy scale for central jets ( $$|\eta | .2$$ | η | 1.2 ) vary from 1% for a wide range of high- $$p_{{\text {T}}}$$ p T jets ( $$250 _{{\text {T}}} ~{\text {Ge}}{\text {V}}$$ 250 p T 2000 GeV ), to 5% at very low $$p_{{\text {T}}}$$ p T ( $$20~{\text {Ge}}{\text {V}}$$ 20 GeV ) and 3.5% at very high $$p_{{\text {T}}}$$ p T ( $$ .5~{\text {Te}}{\text {V}}$$ 2.5 TeV ). The relative jet energy resolution is measured and ranges from ( $$24 \pm 1.5$$ 24 ± 1.5 )% at 20 $${\text {Ge}}{\text {V}}$$ GeV to ( $$6 \pm 0.5$$ 6 ± 0.5 )% at 300 $${\text {Ge}}{\text {V}}$$ GeV .
Publisher: Emerald
Date: 04-2019
Abstract: The purpose of this paper is to analyse factors that determine farmers’ intention to commercialise vegetable-based agribusiness ventures in rural areas and assess the effect of commercialisation on farmers’ income. The study used a regression approach. Market participation and farmers’ income were hypothesised to be dependent on other external factors. This study employed data compiled from a quantitative survey of 357 farm households located in four major vegetable producing regions of rural East Java and Bali, Indonesia. Results indicate that household attributes, business environment, supporting facilities and farm characteristics determined farmers to commercialise vegetable farming. Access to credit, seed technology and farm site played high contribution to the market participation. Ultimately, commercial vegetable farming provides an economic advantage regarding increased income. Land fragmentation and status of landholding were identified to influence the net revenue of vegetable farming. This study has a limitation concerning the number of s les and the availability of data and information. The number of s les is 357 which is about 4 per cent of the total population. Establishment of vegetable agribusiness terminals with all market infrastructures, adequate access to market information, credit and human capital investment through training and extension services are also required, will boost market participation. Re-structuring land ownership might be the best step to augment farmers’ income, through consolidation of fragmented fertile lands devoted to intensive vegetable farming. This study was purposely conducted in rural areas where there were subsistence farmers, as this is to improve farmers’ income by commercialising vegetable crops. A novel feature of this finding is the role of access to credit in the commercialisation of vegetable farming and the impact of landholding status on the profitability of intensive farming of high-valued vegetables.
Publisher: Emerald
Date: 18-05-2015
DOI: 10.1108/JADEE-01-2014-0002
Abstract: – Chilli plays an important role in the Indonesian economy through its multiplier effect. The recent rapid growth of chilli production in Indonesia can be explained by the development of agricultural and communication technologies and improved market infrastructure. The purpose of this paper is to analyse factors that affect farmers’ decisions to adopt chilli-based agribusinesses. Intensive chilli farming, as a part of agricultural commercialisation, is considered a technological package that is more profitable but also more input- and labour-intensive than the production of rice or other cereal crops. – This study used a logit model to estimate the farmers’ decision function. Personal characteristics, technical factors and business environment were hypothesised to influence farmers’ decisions to adopt intensive chilli farming. Data for this study were compiled from surveys conducted during 2009-2011. The surveys interviewed 300 farmer households in three main chilli producing regions of Java, Indonesia. – The results indicate that younger farmers, and also farmers with more experience, were more likely to adopt chilli farming. Availability of chilli production technology and the use of mobile phones prompted farmers to adopt chilli farming. Access to vegetable markets, credit, and market information were other factors driving farmers’ decisions to take up chilli production. Most farmers were motivated to grow chilli to increase their incomes. Ecological factors were also the reasons. – The s le for this research is quite low. However, the s le was drawn from representative potential chilli production areas in Indonesia. – There is room to increase the number of chilli-based agribusinesses in Indonesia. Intensive chilli farming should be introduced to young farmers and those with experience in vegetable production. Farm credit, market information, and agronomic technologies should be made more available and accessible to farmers. Strengthening communication networks among farmers through the use of mobile phones is the best way to encourage farmers to adopt intensive chilli farming. Vegetable markets should be established in potential chilli producing regions.
Publisher: Elsevier BV
Date: 12-2023
Publisher: University of Trunojoyo Madura
Date: 05-12-2016
DOI: 10.21107/AGRIEKONOMIKA.V5I2.1686
Abstract: This study aims to analyze the impact of an integrated disease management (IDM) on chilli. Chili disease control technologies that include crop barrier with corn and Crotalaria, and compost tea have been introduced to farmers in Magelang and Brebes. A qualitative approach was used to assess and estimate the socio-economic impact of agricultural research. The study was conducted in 2011. The results showed that based on land use chili, the net economic benefits generated was relatively low. There were only a few farmers who have adopted the technology on chili peppers. Furthermore, the survey also illustrates that three years after its introduction in 2007 the technology status at farm level was just at consciousness phase. Learning of this fact, a thorough evaluation of the technology on chili pepper should be done immediately. Research institutions which have developed the technology should encourage bottom-up initiatives and build a shared commitment to complete the implementation of a clear strategic plan. The adoption of the strategic plan should include the integration of research activities with promotional activities for ex le by revitalizing participatory approaches to awareness of farmers.
Publisher: Universitas Gadjah Mada
Date: 31-07-2015
DOI: 10.22146/JML.18736
Publisher: Universitas Islam Indonesia (Islamic University of Indonesia)
Date: 10-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0TC04702C
Abstract: The versatile qualities of gold coated magnetic nanoparticles for both optical and electrochemical detection, as well as the separation of analytes, make them an excellent choice for ultrasensitive biosensing applications.
Publisher: Emerald
Date: 05-11-2022
DOI: 10.1108/AJIM-02-2021-0053
Abstract: The purpose of this study is to assess the impact of mobile phone usage on sales and profit as the indicator of business performance, to analyse the facilitating roles of mobile phones and factors affecting farmers' decision to use the mobile phone in agribusiness activities. Intensive farming was selected in this study due to its higher profitability than other crops. Data were compiled from field surveys of 1,040 farmer households in vegetable production regions of Indonesia. This study employed structural equation modelling, identifying mediating variables and quantifying multiple endogenous variables' direct and indirect effects in simultaneous regression equations. The results indicate that mobile phone usage enabled farmers to increase sales, obtain market information, acquire improved agronomic technology, access credit and contact customers. The device enhanced profit through mediations of high sales, reasonable prices and access to credit and market information. The personal attributes of farmers determined the adoption of mobile phones to support agribusiness activities. This study paid attention to the use of mobile phones, which was considered an integral technology of information and communication. Other components, such as personal computers and other Internet-based devices, need further study. As the rate of mobile phone use was still low, farmers should be encouraged to utilise the device. Socialisation and specially designed training workshops on agribusiness information systems using mobile phones are of the best ways. Using structural equation modelling enables to analyse of multi-dependent variables in one model. Farm-level data provide a real situation, and policy implications should address the right target. The subject of this investigation is a semi-subsistence farm household that lacked access to information and communication technology.
Publisher: Informa UK Limited
Date: 09-10-2017
Publisher: Emerald
Date: 08-07-2019
DOI: 10.1108/IJPPM-10-2018-0367
Abstract: The purpose of this paper is to analyse the effect of enhanced knowledge and technology innovations, which were resulted from training, on the simultaneous production of rice and soybean in Java, Indonesia. A model of product possibility frontier with two outputs produced using the same resources was employed. Based on the model, supply responses of soybean and rice were derived. Aggregate data consisting of 12 regions during the ten years of 2000–2009 were compiled from relevant agricultural institutions at the provincial level. Improvement in farmers’ capacity has been able to increase production of soybean and rice simultaneously. Farmers’ capacity increased after completion of the school. Knowledge and skill gained from the school have been applied to both rice and soybean farming. Other economic factors also affected the supply response of both commodities. Available data covered periods 2000–2009. However, the outcomes are still relevant to the current situation because food crops are the basic necessity. This study used secondary aggregate data, which might be less accurate than primary data. However, secondary data have the advantage concerning coverage and time span. The Government, in collaboration with non-government organisations and the private sectors, should continue to enhance farmers’ capacity to increase the production of food crops to feed people in Indonesia, and over the world in general. An analysis of joint production using a concept of product transformation curve can measure the impact of training on multi products.
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9NR05802H
Abstract: High- and low-index faceted metal (Pt, Pd, Ru, Ir, Rh) nanoparticles designed for improved electrocatalytic activity and stability are reviewed.
Publisher: American Chemical Society (ACS)
Date: 21-05-2020
Publisher: Emerald
Date: 21-03-2023
DOI: 10.1108/JADEE-09-2022-0208
Abstract: Rice agroecosystems must grow sustainably to meet the increasing demand for food. A fish-rice co-culture was introduced to conserve rice agroecosystems in farming communities. This study aims to assess the technical, socio-economic and environmental outcomes as the pillars of sustainability. This study employs a mixed qualitative-quantitative approach to assess a sustainable intensification programme's impact on sustainability. Data were collected using group discussions and self-assessment surveys. The study sites cover East Java and West Java provinces. This study found that rice-fish co-culture improved the sustainability of the farming system. Farmers applied pest and disease management and partially substituted inorganic fertilisers with organic ones. The outcomes were apparent in the ersity of harvested products. Economically, the rice yield increased, the production costs decreased and the resultant increased income. Environmentally, the fish-rice co-culture was sound because of ecological inputs. The population of natural enemies of pests increased. Socially, fish-rice co-culture was acceptable to the community since there was no conflict with the local governments, local norms and religions and the existing farming practices of other crops. This study was based on five groups as case studies, such that the result might not represent the general condition. The study's methodology was supported by valid economic theories and data directly gathered from farmers.
Publisher: American Chemical Society (ACS)
Date: 26-05-2022
DOI: 10.1021/ACS.ACCOUNTS.2C00140
Abstract: Branched metal nanoparticles have unique catalytic properties because of their high surface area with multiple branches arranged in an open 3D structure that can interact with reacting species and tailorable branch surfaces that can maximize the exposure of desired catalytically active crystal facets. These exceptional properties have led to the exploration of the roles of branch structural features ranging from the number and dimensions of branches at the larger scales to the atomic-scale arrangement of atoms on precise crystal facets. The fundamental significance of how larger-scale branch structural features and atomic-scale surface faceting influence and control the catalytic properties has been at the forefront of the design of branched nanoparticles for catalysis. Current synthetic advances have enabled the formation of branched nanoparticles with an unprecedented degree of control over structural features down to the atomic scale, which have unlocked opportunities to make improved nanoparticle catalysts. These catalysts have high surface areas with controlled size and surface facets for achieving exceedingly high activity and stability. The synthetic advancement has recently led to the use of branched nanoparticles as ideal substrates that can be decorated with a second active metal in the form of islands and single atoms. These decorated branched nanoparticles have new and highly effective catalytic active sites where both branch metal and decorating metal play essential roles during catalysis.In the opening half of this Account, we critically assess the important structural features of branched nanoparticles that control catalytic properties. We first discuss the role of branch dimensions and the number of branches that can improve the surface area but can also trap gas bubbles. We then investigate the atomic-scale structural features of exposed surface facets, which are critical for enhancing catalytic activity and stability. Well-defined branched nanoparticles have led to a fundamental understanding of how the branch structural features influence the catalytic activity and stability, which we highlight for the oxygen evolution reaction (OER) and biomass oxidation. In discussing recent breakthroughs for branched nanoparticles, we explore the opportunities created by decorated branched nanoparticles and the unique bifunctional active sites that are exposed on the branched nanoparticle surfaces. This class of catalysts is of rapidly growing importance for reactions including the hydrogen evolution reaction (HER) and methanol oxidation reaction (MOR), where two exposed metals are required for efficient catalysis. In the second half of this Account, we explore recent advances in the synthesis of branched nanoparticles and highlight the cubic-core hexagonal-branch growth mechanism that has achieved excellent control of all of the important structural features, including branch dimensions, number of branches, and surface facets. We discuss the slow precursor reduction as an effective strategy for decorating metal islands with controlled loadings on the branched nanoparticle surfaces and the spread of these metal islands to form single-atom active sites. We envisage that the key synthetic and structural advances identified in this Account will guide the development of the next-generation electrocatalysts.
Publisher: National Institute of Rural Development and Panchayati Raj
Date: 03-2018
Publisher: American Chemical Society (ACS)
Date: 03-10-2019
DOI: 10.1021/JACS.9B07659
Abstract: The direct growth of Pt islands on lattice mismatched Ni nanoparticles is a major synthetic challenge and a promising strategy to create highly strained Pt atoms for electrocatalysis. By using very mild reaction conditions, Pt islands with tunable strain were formed directly on Ni branched particles. The highly strained 1.9 nm Pt-island on branched Ni nanoparticles exhibited high specific activity and the highest mass activity for hydrogen evolution (HER) in a pH 13 electrolyte. These results show the ability to synthetically tune the size of the Pt islands to control the strain to give higher HER activity.
Publisher: Jurnal Ilmu Administrasi dan Organisasi: Bisnis & Birokrasi
Date: 12-12-2014
Publisher: Universitas Islam Indonesia (Islamic University of Indonesia)
Date: 10-2014
Publisher: Wiley
Date: 12-10-2020
Publisher: Wiley
Date: 29-04-2020
Publisher: Springer Science and Business Media LLC
Date: 07-2021
Abstract: A search for long-lived particles, which have come to rest within the ATLAS detector, is presented. The subsequent decays of these particles can produce high-momentum jets, resulting in large out-of-time energy deposits in the ATLAS calorimeters. These de- cays are detected using data collected during periods in the LHC bunch structure when collisions are absent. The analysed dataset is composed of events from proton-proton collisions produced by the Large Hadron Collider at a centre-of-mass energy of $$ \\sqrt{s} $$ s = 13 TeV and recorded by the ATLAS experiment during 2017 and 2018. The dataset used for this search corresponds to a total live time of 579 hours. The results of this search are used to derive lower limits on the mass of gluino R -hadrons, assuming a branching fraction $$ \\mathcal{B}\\left(\\overset{\\sim }{g}\\to q\\overline{q}{\\chi}_1^0\\right) $$ B g ~ → q q ¯ χ 1 0 = 100%, with masses of up to 1 . 4 TeV excluded for gluino lifetimes of 10 − 5 to 10 3 s.
Publisher: Wiley
Date: 05-2019
DOI: 10.1002/APP5.276
Publisher: Informa UK Limited
Date: 21-10-2013
Publisher: Wiley
Date: 13-07-2020
Publisher: Universitas Muhammadiyah Surakarta
Date: 28-06-2016
Abstract: Vegetable production, including that of chillies, plays an important role in agricultural sector and rural economic development worldwide. This is because of greater farm productivity with regard to vegetables than cereal and staple crops. This paper analyses the impact of seed technology development on the economic aspects of chilli production in Central Java. Particular attention is paid to improved varieties of chilli. Potential consequences of seed technology development are discussed. Data of this study are compiled from surveys conducted in three selected chilli producing regions in 2010-2012. The results show that the major varieties of chilli grown by surveyed farmers are grouped into three broad types: hybrids, local and improved open pollinated varieties. The chilli varieties farmers selected varied according to location and cropping season. In the dry season, farmers grew similar proportions of hybrid, local, and open pollinated types. Nevertheless, there were differences among the survey sites. Farmers grew different varieties to exploit seasonal microclimates and market preferences. Mostly, farmers selected varieties for economic motives. The consequence of growing hybrids was less use of agrochemicals, particularly pesticides, than for other varieties. Overall, they show the best economic performance in the study site. Development of seed technology should consider agro-ecological and economic aspects to obtain better outcomes. Private sector and national research institutions need to collaborate more to utilise available genetic resources to produce better varieties of chilli.
Publisher: Springer Science and Business Media LLC
Date: 07-2021
Abstract: A search for supersymmetry in events with four or more charged leptons (electrons, muons and τ -leptons) is presented. The analysis uses a data s le corresponding to 139 fb − 1 of proton-proton collisions delivered by the Large Hadron Collider at $$ \\sqrt{s} $$ s = 13 TeV and recorded by the ATLAS detector. Four-lepton signal regions with up to two hadronically decaying τ -leptons are designed to target several supersymmetric models, while a general five-lepton signal region targets any new physics phenomena leading to a final state with five charged leptons. Data yields are consistent with Standard Model expectations and results are used to set upper limits on contributions from processes beyond the Standard Model. Exclusion limits are set at the 95% confidence level in simplified models of general gauge-mediated supersymmetry, excluding higgsino masses up to 540 GeV. In R -parity-violating simplified models with decays of the lightest supersymmetric particle to charged leptons, lower limits of 1 . 6 TeV, 1 . 2 TeV, and 2 . 5 TeV are placed on wino, slepton and gluino masses, respectively.
Publisher: Emerald
Date: 04-02-2019
Abstract: The purpose of this paper is to analyze the impact of microcredit and agronomic technology on farm households’ prosperity, and to determine important factors affecting farmers’ access to microcredit and technology adoption in Indonesian intensive farming. The focus of the study was farmers engaging with chili-based agribusiness in rural areas. Data for this study were compiled from a survey that interviewed 250 farm households. S les of the study were randomly selected from chili farming community in three regions of Java during 2013–2014. Data were analyzed using structural equation modeling (SEM). Microcredit provided positive direct and indirect impacts on household prosperity. Microcredit indirectly impacted the well-being through the mediation of technology adoption. Farmers’ characteristics and agribusiness environment determined farmers’ decision to access microcredit and adopt advanced technology. Microcredit and technology have enhanced farmers’ well-being through pathways that enabled farmers to develop farming scale. The government should offer more alternatives to advanced technology and flexible procedures of access to credit at the same time to ensure sustained pathways of rural economic growth in Indonesia. This paper applied a SEM to a proposition of simultaneous causal interrelations among microcredit, technology and farmers’ prosperity.
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1CC05165B
Abstract: A new type of gold-coated magnetic nanoparticle with strongly magnetic zero-valent iron core-iron oxide shell were synthesized. The small size of the magnetic cores and the zero-valent iron ensured superparamagnetic behaviour and high saturation magnetization of the overall nanoparticles. The nanoparticles showed stability against magnetic aggregation and good colloidal stability, which is important for many biomedical applications.
Publisher: Springer Science and Business Media LLC
Date: 25-03-2022
Publisher: University of Trunojoyo Madura
Date: 04-2018
DOI: 10.21107/AGRIEKONOMIKA.V7I1.3410
Abstract: One of the factors that determines the success or failure of agribusiness is ability of farmers to sell the product. Thus, marketing is an important part of vegetable farming. Good marketing process leads to commercialization, and unsuccessful in this step leads to inadequate income. This study aims to explore the marketing aspects of vegetables using descriptive analysis of vegetable marketing relates issues. The aspects include sources of information, traders, time to sell, use of mobile phone in marketing and the potential constraints. Marketing characteristics of each region were discussed by comparing and contrasting one to another. Data for this study were gathered from a quantitative investigation of 360 farm households situated in four main vegetable producing regions of rural East Java and Bali, Indonesia. The results show that farmers relied on traders and neighbouring farmers as the trusted sources market information. The ways of farmers to sell the product to the market varied across regions. Commonly, farmers had frequent buyers or costumers to sell the products without any special commitment. In majority, farmers contacted a few of traders to sell the product about three days before harvesting. Highly fluctuation of prices was perceived to be the most important constraint among other factors limiting good marketing. Thus, there is a need to address such constraints to help farmers to get fairness.
Publisher: Emerald
Date: 28-12-2022
DOI: 10.1108/IJPPM-09-2019-0445
Abstract: A research and development project disseminated ecological technologies to approximately 3,250 vegetable farmers through farmer field schools (FFS) in four districts of Bali and East Java provinces of Indonesia. This article aims to assess the economic sustainability of vegetable production after FFS participation. A survey randomly s led 500 farmers, comprised of FFS participants (50%) and non-FFS participants (50%). Based on 1,000 farm operations, this analysis employed input-saving technology as the fundamental model examined using the double-difference method. Simultaneous reduction of agrochemicals and improvement of productivity represent indicators of economic sustainability. Results indicate that pesticide use decreased without jeopardising farm productivity moreover, vegetable production increased. These findings indicate that the ecological technologies transferred through FFS significantly improved economic sustainability performance. This study purposively selected farmers who grew tomato and chilli. Thus, the outcomes are not generalisable to other crops. FFS continues to be an effective method for transferring agricultural technologies to farmer communities. Policymakers are recommended to use FFS for disseminating beneficial and sustainable technologies to broader agricultural communities. The adoption of ecological technologies provides positive economic and ecological milieus. This study employs a double-differences approach to verify input-saving technological progress. Therefore, the performance of economic sustainability attributable to the project intervention is theoretically justified.
Publisher: Wiley
Date: 17-06-2022
Abstract: Gold‐coated magnetic nanoparticles are key materials for the fast separation and ultrasensitive detection of analytes in magnetoplasmonic sensors. However, the synthesis of gold‐coated magnetic nanoparticles typically requires small‐scale, colloidal methods over hours or days and often results in incomplete shells with variable optical properties. A robust, rapid, and scalable synthesis method is still needed to reliably form a complete gold nanoshell around magnetic nanoparticles. Herein, a new methodology for the synthesis of gold‐coated magnetic nanoparticles via a flow‐based manufacturing system that can easily be scaled up is presented. The developed method first produces gold‐seeded silica coated magnetic nanoparticles and then a complete, tunable gold shell with relatively uniform size and shape. The flow‐based method can be performed in a total time of less than 2 min, enabling rapid and complete gold coating. The particles show both excellent magnetic and plasmonic properties, which facilitates application as biosensing agents in dark‐field microscopy and surface‐enhanced Raman scattering.
Publisher: Wiley
Date: 12-2020
DOI: 10.1002/ALZ.041609
No related grants have been discovered for Lucy Gloag.