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Long-term conservation tillage results in a more balanced soil microbiological activity and higher nutrient supply capacity

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International Soil and Water Conservation Research 2023年第3期11卷 528-537页

作者： priyo adi nugroho Katalin Juhos Nandor Prettl Balazs Madarasz Zsolt Kotroczo Department of Agro-Environmental Studies Institute of Environmental ScienceHungarian University of Agriculture and Life SciencesHungary Geographical Institute Research Centre for Astronomy and Earth SciencesBudapestHungary

Soil health depletion due to intensive tillage operations is a global issue in the agricultural *** tillage(CT)which involves non-inversion tillage and leaving~30%of the soil surface covered with crop residues,is a strategy designed to enhance soil ***,no comprehensive study to investigate the long-term effect of CT on soil biological activity and the soil nutrient supply has yet been widely carried *** and chemical soil properties were assessed at depths 0-5,10-15,and 20-25 cm depths after 18 years of CT and conventional tillage practice(PT).Various stages in the vegetative growth of maize were investigated in 2021 in *** findings indicated that tillage intensity,soil depth,and growth stages all significantly influenced soil enzyme activities and the concentration of soil *** soil disturbance resulted in a significantly larger concentration of soil carbon parameters(total organic carbon and labile carbon)in CT plots,where the activity ofβ-glucosidase and dehydrogenase(DHA)in the upper soil layer increased significantly(0.7-2.6 and 2.6-4.7 times,respectively)compared to *** high amount of organic matter and the greater resistance to erosion observed in CT also contributed to the higher concentration of available nutrients(NH_(4),NO_(3),Ca,K)and total P in the surface soil *** activity was highest in the mid-stage of vegetative growth and was positively correlated to the total P *** alterations in soil water content were clearly negatively corelated with the change in DHA and phosphatase ***,due to the more balanced environmental conditions,the decomposition of organic substances was more balanced and slower in CT than in *** implied that the mobilization of nutrients in the soil was more balanced as well,and that the nutrients were released *** enhancement of the soil nutrient-supplying capacity achieved by means of long-term conservation tillage provid

关键词： Dehydrogenase β-glucosidase Phosphatase Nutrient balance Mineralization

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Assessment of corrected time-step method for nominal ionospheric gradient calculation: A comparative analysis with spatial approaches

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Earth and Planetary Physics 2024年第4期8卷 641-649页

作者： Slamet Supriadi Prayitno Abadi Susumu Saito Harry Bangkit Dwiko Unggul Prabowo adi Purwono Ginaldi Ari nugroho Research Center for Smart Mechatronics National Research and Innovation Agency(BRIN)BandungIndonesia Research Center for Climate and Atmosphere BRINBandungIndonesia School of Electrical Engineering Telkom UniversityKab.BandungIndonesia Electronic Navigation Research Institute National Institute of MaritimePort and Aviation TechnologyTokyoJapan Research Center for Space BRINBandungIndonesia

The effect of ionospheric delay on the ground-based augmentation system under normal conditions can be mitigated by determining the value of the nominal ionospheric gradient(σvig).The nominal ionospheric gradient is generally obtained from Continuously Operating Reference Stations data by using the spatial single-difference method(mixed-pair,station-pair,or satellite-pair)or the temporal single-difference method(time-step).The time-step method uses only a single receiver,but it still contains ionospheric temporal *** introduce a corrected time-step method using a fixed-ionospheric pierce point from the geostationary equatorial orbit satellite and test it through simulations based on the global ionospheric *** also investigate the effect of satellite paths on the corrected time-step method in the region of the equator,which tends to be in a more north–south direction and to have less coverage for the east–west ionospheric *** study also addresses the limitations of temporal variation correction coverage and recommends using only the correction from *** processes are developed under simulations because observational data are still difficult to *** findings demonstrate that the corrected time-step method yieldsσvig values consistent with other approaches.

关键词： ground-based augmentation system nominal ionospheric gradient time-step correction global ionospheric model

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Franchise ownership redirection:real options perspective

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Financial Innovation 2016年第1期2卷 135-145页

作者： Lukito adi nugroho Advanced Mathematical Sciences Department Meiji University4-21-1 NakanoTokyoJapan

Background:For over 40 years,the franchise ownership redirection hypothesis has attracted the attention of many *** study,differing from previous ones,proposes an alternative approach for this hypothesis using a real options framework with the extension of agency ***:The real options model is built using the least square Monte Carlo method,where the franchisor’s decision to franchise is perceived as a deferred investment while maintaining the right of future ***:Tested using monte carlo simulation based hypothetical case,the model shows a different result from classical real options call *** is mainly due to franchise contractual arrangement,where royalty fee lower the threshold of acquisition cost in converting the franchise outlet to company ***:The aim of this study is to create an analytical framework that helps a franchisor decide whether or not toacquire and convert a franchise unit to a company-owned unit at a certain point in time,analyzing the choice as a deferment of *** franchisors that faces the opportunity to optimize profit by converting the franchise unit to a company-owned unit should acknowledge it as real options thus negotiate the terms with their franchisees.

关键词： Real options Franchise Agency theory Monte Carlo simulation

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Zeolite A Synthesized from Geothermal Waste Using Conventional and Microwave Heating for the Hydrothermal Treatment

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Fluid Dynamics & Materials Processing 2021年第2期17卷 385-395页

作者： Sulardjaka Sulardjaka Sri nugroho Norman Iskandar Agus P.adi Deni F.Fitriyana Diponegoro University Semarang50275Indonesia Universitas Negeri Semarang GunungpatiSemarang50229Indonesia

Zeolite A has been successfully synthesized from geothermal waste with natrium aluminate and natrium silicate using conventional(C-H)and microwave heating(M-H)for the hydrothermal *** products obtained for different aging times have been characterized using X-Ray Diffraction(XRD),Fourier transformation infrared spectroscopy(FTIR),and scanning electron microscopy(SEM).It is shown that with the M-H process,zeolite can be formed at relatively low temperature(100°C)in a relatively short time(40 min).The crystallization of zeolite A has been found to be generally promoted by an increase of aging and synthesis time;however,it has also been observed that relative long aging times can transform it into *** A produced through the M-H process generally displays a smaller and more homogeneous crystal size with respect to that obtained with the C-H method.

关键词： Geothermal waste microwave-hydrothermal conventional-hydrothermal zeolite A

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Hedge effectiveness of put replication, gold, and oil on ASEAN-5 equities

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Financial Innovation 2020年第1期6卷 940-968页

作者： Robiyanto Robiyanto Bayu adi nugroho Eka Handriani Andrian Dolfriandra Huruta Faculty of Economics and Business Satya Wacana Christian UniversityJl.Diponegoro 52-60Salatiga 50711Indonesia Faculty of Economics and Business Perbanas InstituteJl.PerbanasSouth Jakarta 12940Indonesia Faculty of Economics and Business Darul Ulum Islamic Centre Sudirman University GUPPIJl.Tentara Pelajar No.13Ungaran 50519Indonesia Chung Yuan Christian University No.200Zhongbei RoadZhongli DistrictTaoyuan CityTaiwan 320

The previous studies have shown that capital market integration has increased in the ASEAN-5,implying that investors making investment diversification across ASEAN capital markets could only earn limited diversification *** diversify their portfolios,equity investors must find other *** main focus of this research is to analyze the effectiveness of put replication,gold,and oil on hedge equities in the ASEAN-5(Indonesia,Malaysia,Singapore,Thailand,and the Philippines).Protective put strategy,DCC-GARCH,and Markowitz optimization are used to measure hedge effectiveness,risk-adjusted-performance such as Sharpe ratio,drawdown,and Omega *** result reveals that gold is a cheaper hedge than oil and oil-hedged strategy is more expensive in ASEAN-5 compared to oil exporting ***,investors with big exposure to the oil-related portfolio should diversify to Philippine *** hedging effectiveness and risk-adjusted-performance perspectives,oil is less attractive than money market instruments and *** study also implies that risk-averse investors should prefer to put replication or guaranteed financial products compared to commodities-hedged strategy.

关键词： DCC-GARCH Gold Oil Minimum variance Portfolio insurance

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Kidney transplantation in Indonesia: An update

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Asian Journal of Urology 2019年第4期6卷 305-311页

作者： Tommy Supit Eriawan Agung nugroho Ardy Santosa Moh adi Soedarso Nanda Daniswara Sofyan Rais Addin Department of General Surgery Faculty of Medicine Diponegoro UniversityDr.Kariadi General HospitalSemarangJawa TengahIndonesia Department of Urology Faculty of Medicine Diponegoro UniversityDr.Kariadi General HospitalSemarangJawa TengahIndonesia

Objective:Indonesia has overcome several barriers to the growth of kidney transplantation within the past ***,the procedure is increasingly performed in several centers across the *** there are limited publications on kidney transplantation from Indonesia,especially from centers outside *** study aims to give a brief overview on transplantation performed,discuss current efforts and progresses of transplantation in Indonesia and chiefly ***:Retrospective analysis of 20 transplant cases in Semarang during 2014e2018 was *** from other transplant centers was acquired through formal correspondences with 11 central teaching hospitals in Jakarta,Surabaya,Yogyakarta,Malang,Bali,Solo,Palembang,Aceh,Medan,Bandung,and ***:There were 629 recorded kidney transplantations performed in 12 centers,and we report on 245 cases with viable *** average age of kidney recipients were younger(35.4 years old)compared to the donors(41.3 years old).Approximately half of the kidneys were obtained from related donors(49.0%)and there was only one case of cadaveric *** three leading etiologies of end-stage renal disease were hypertension(37.4%),diabetes mellitus(26.1%),and autoimmune disease(11.3%).There is only one center that has performed more than 100 kidney transplants in ***:Indonesia has successfully overcome several major hurdles that had previously hindered the growth of *** improvement should concentrate on the development of integrated organ transplant infrastructure,decentralization of transplant professionals,establishment of National kidney transplant database and changing the Nation’s paradigm on cadaveric organ donor through public education.

关键词： Kidney transplantation End-stage renal disease Chronic kidney disease Indonesia Semarang Epidemiology Update

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Retinal vasculature enhancement using independent component analysis

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Journal of Biomedical Science and Engineering 2009年第7期2卷 543-549页

作者： Ahmad Fadzil M. Hani Hanung adi nugroho 不详

Retinal vasculature is a network of vessels in the retinal layer. In ophthalmology, information of retinal vasculature in analyzing fundus images is important for early detection of diseases related to the retina, e.g. diabetic retinopathy. However, in fundus images the contrast between retinal vasculature and the background is very low. As a result, analyzing or visualizing tiny retinal vasculature is difficult. There-fore, enhancement of retinal vasculature in digital fundus image is important to provide better visualization of retinal blood vessels as well as to increase accuracy of retinal vasculature segmentation. Fluorescein angiogram overcomes this imaging problem but it is an invasive procedure that leads to other physiological problems. In this research work, the low contrast problem of retinal fundus images ob-tained from fundus camera is addressed. We develop a fundus image model based on probability distribution function of melanin, haemoglobin and macular pigment to represent melanin, retinal vasculature and macular region, respectively. We determine retinal pigments makeup, namely macular pigment, melanin and haemoglobin using independent component analysis. Independent component image due to haemoglobin obtained is used since it exhibits higher contrast retinal vasculature. Contrast of reti-nal vasculature from independent component image due to haemoglobin is compared to those from other enhancement methods. Results show that this approach outperforms other non-invasive enhancement methods, such as contrast stretching, histogram equalization and CLAHE and can be beneficial for retinal vasculature segmentation. Contrast enhancement factor up to 2.62 for a digital retinal fundus image model is achieved. This improvement in contrast reduces the need of applying contrasting agent on patients.

关键词： Contrast Enhancement Independent Comp- onent Analysis Medical Image Processing Retinal Fundus Image

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井里汶海底十世纪沉船打捞纪实

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故宫博物院院刊 2007年第6期 151-154页

作者： adi Agung Tirtamarta, M.M[印度尼西亚] 辛光灿(译) 袁腱(校) PT.Paradigma Putra Sejahtrra会长不详

*** Putra Sejahtera（简称***）成立于2001年，业务以打捞沉船为主。公司创始人adi Agung Tirtamarta先生和priyo Saryanto Brodjonegoro先生。adi Agung Tirtamarta先生是一位艺术品收藏家（古陶瓷、古画和古代家具），priyo S Brodjo... 详细信息

关键词：沉船打捞海底古代家具收藏家艺术品创始人古陶瓷

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