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Prioritizing woody species for the rehabilitation of arid lands in western Iran based on soil properties and carbon sequestration

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Journal of Arid Land 2020年第4期12卷 640-652页

作者： Masoud BAZGIR Reza OMIDIPOUR Mehdi HEYDARI Nasim ZAINALI Masoud HAMIDI Daniel C dey Department of Water and Soil Engineering Faculty of AgricultureIlam UniversityIlam ***Iran Department of Range and Watershed Management Faculty of Natural Resource and Earth ScienceShahrekord UniversityShahrekord ***Iran Department of Forestry Faculty of AgricultureIlam UniversityIlam ***Iran US Forest Service Northern Research StationColumbiaOM 65211USA

Plants are an important component in many natural ecosystems. They influence soil properties, especially in arid ecosystems. The selection of plant species based on their adaptations to site conditions is essential for rehabilitation of degraded sites and other construction sites such as check-dams. Other factors to be considered in species selection include their effects on soil properties and their abilities to meet other management objectives. The purpose of this study was to assess the effects of native(Populus euphratica Oliv. and Tamarix ramosissima Ledeb.) and introduced(Eucalyptus camaldulensis Dehnh. and Prosopis juliflora(Swartz) DC.) woody species on soil properties and carbon sequestration(CS) in an arid region of Iran. Soil sampling was collected at three soil depths(0–10, 10–20 and 20–30 cm) at the sites located under each woody species canopy and in an open area in 2017. Soil physical-chemical property was analyzed in the laboratory. The presence of a woody species changed soil characteristics and soil CS, compared with the open area. For example, the presence of a woody species caused a decrease in soil bulk density, of which the lowest value was observed under E. camaldulensis(1.38 g/cm^3) compared with the open area(1.59 g/cm^3). Also, all woody species significantly increased the contents of soil organic matter and total nitrogen, and introduced species had more significant effect than native species. The results showed that CS significantly increased under the canopy of all woody species in a decreasing order of P. euphratica(9.08 t/hm^2)>E. camaldulensis(8.37 t/hm^2)>P. juliflora(5.20 t/hm^2)>T. ramosissima(2.93 t/hm^2)>open area(1.33 t/hm^2), thus demonstrating the positive effect of a woody species on CS. Although the plantation of non-native species had some positive effects on soil properties, we recommend increasing species diversity in plantations of native and introduced woody species to provide more diversity for the increased ecosystem

关键词： arid ecosystem carbon sequestration degraded soil restoration reforestation soil management

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The Relationship between Model Biases in East Asian Summer Monsoon Rainfall and Land Evaporation

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Advances in Atmospheric Sciences 2023年第11期40卷 2029-2042,I0004-I0013页

作者： Ruth GEEN Marianne PIETSCHNIG Shubhi AGRAWAL Dipanjan dey FHugo LAMBERT Geoffrey KVALLIS School of Geography Earth and Environmental SciencesUniversity of BirminghamBirmingham B152TTUK Department of Mathematics and Statistics University of ExeterExeter EX44QJUK Department of Earth and Environmental Sciences Indian Institute of Science Education and ResearchBhopal 462066India School of Ocean and Earth Science University of SouthamptonSouthampton SO171BJUK

The East Asian Summer Monsoon(EASM)provides the majority of annual rainfall to countries in East *** state-of-the-art models broadly project increased EASM rainfall,the spread of projections is large and simulations of present-day rainfall show significant climatological *** evapotranspiration biases occur locally over East Asia,and globally over land,in simulations both with and without a coupled *** study explores the relationship between evapotranspiration and EASM precipitation ***,idealized model simulations are presented in which the parameterization of land evaporation is modified,while sea surface temperature is *** results suggest a feedback whereby excessive evapotranspiration over East Asia results in cooling of land,a weakened monsoon low,and a shift of rainfall from the Philippine Sea to China,further fueling ***-model regressions against evapotranspiration over China indicate a similar pattern of behavior in Atmospheric Model Intercomparison Project(AMIP)*** causes of this pattern are *** feedback is not explained by an overly intense global hydrological cycle or by differences in radiative *** of land-only simulations indicates that evapotranspiration biases are present even when models are forced with prescribed *** are strengthened when coupled to the atmosphere,suggesting a role for land-model errors in driving atmospheric *** atmosphere-ocean models are shown to have similar evapotranspiration biases to those in AMIP over China,but different precipitation biases,including a northward shift in the ITCZ over the Pacific and Atlantic Oceans.

关键词： monsoon East Asia China evapotranspiration model bias

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Fabrication of graphene oxide-keratin-chitosan nanocomposite as an adsorbent to remove turbidity from tannery wastewater

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Water Science and Engineering 2023年第2期16卷 184-191页

作者： Kobita Roy Thuhin Kumar dey Mamun Jamal Rajasekar Rathanasamy Moganapriya Chinnasamy MdElias Uddin Department of Leather Engineering Faculty of Mechanical EngineeringKhulna University of Engineering&TechnologyKhulna 9203Bangladesh Department of Chemistry Faculty of Civil EngineeringKhulna University of Engineering&TechnologyKhulna 9203Bangladesh Department of Mechanical Engineering Kongu Engineering CollegeErodeTamilnadu 638052India Department of Mining Engineering Indian Institute of Technology KharagpurWest Bengal 721302India

Excessive turbidity in water is aesthetically unappealing and severely malfunctions the photosynthesis process of aquatic ecosystems. This study aimed to evaluate the effectiveness of a nanocomposite adsorbent made of graphene oxide-keratin-chitosan for removing turbidity from tannery influent. The nanocomposite was fabricated with simple solution casting methods. Material dispersibility, bonding between composite materials (amide linkage), and the surface morphology of the nanocomposite were analyzed with the ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, and scanning electron microscopy. At pH of 6, 2 g/L of adsorbent and a 25-min contact time resulted in about 88% of turbidity elimination. After the adsorption process, the total suspended solids, total dissolved solids, salinity, biochemical oxygen demand, and chemical oxygen demand of the tannery wastewater were reduced by 55%, 29%, 12%, 58%, and 75%, respectively. The optimum dosage of the nanocomposite with the maximum turbidity removal capacity was 12.62 mg/g. According the adsorption kinetic and isotherm models, the graphene oxide-keratin-chitosan nanocomposite played a key role in the turbidity removal process with chemisorption and electrostatic multilayer adsorption. This study provided methodological and mechanistic insights into the procedures of investigating the removal of turbidity from tannery wastewater with a novel composite material.

关键词： Adsorption Chitosan Electrostatic interaction Nanocomposite Wastewater

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Exploring user engagement strategies and their impacts with social media mining:the case of public libraries

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Journal of Management Analytics 2015年第4期2卷 295-313页

作者： Hongbo Zou Hsuanwei Michelle Chen Sharmistha dey School of Information Systems Queensland University of TechnologyBrisbaneAustralia School of Information San Jose State UniversitySan JoseUSA

Public libraries are increasingly using social media to connect their users in innovative *** make use of social media as a tool for‘being part of their communities’,promoting library services and events,and creating participatory ***,little empirical investigation has explored the success of such social media use by *** this paper,we study the role of Twitter for engaging users via a focus on public *** use topic-modeling techniques to classify library user engagement strategies into four categories:literature exhibits,engaging topics,community building and library *** four engagement strategies are re-examined via a sentiment analysis of tweets collected from 10 public libraries over 3 *** data mining of tweets,we explore how user engagement strategies are used by libraries on Twitter,and suggest the best practices for libraries interested in pursuing social media initiatives to use to engage their users effectively.

关键词： big data analytics user engagement social media social media mining topic modelling sentiment analysis participatory services

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Steric hindrance effect of Schiff-base ligands on magnetic relaxation dynamics and emissive behavior of two dinuclear dysprosium complexes

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Journal of Rare Earths 2023年第7期41卷 1049-1057,I0003页

作者： Youdong Jiang Sourav dey Hongshan Ke Yongsheng Yang Lin Sun Gang Xie Sanping Chen Gopalan Rajaraman Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry and Materials ScienceNorthwest UniversityXi'an 710127China Department of Chemistry Indian Institute of Technology BombayPowaiMumbai400076India State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Henan Key Laboratory of Polyoxometalate Chemistry Institute of Molecular and Crystal EngineeringCollege of Chemistry and Chemical EngineeringHenan UniversityKaifeng 475004China

The self-assembly reactions between mixed-ligand and tetrahydrate dysprosium acetate in the presence of mixed organic solvents lead to two structural similar dinuclear dysprosium complexes with composition formulas of Dy_(2)(L_1)_(2)(L_(2))_(2)(CH_(3)OH)_(2)·CH_(2)Cl_(2)·CH_(3)OH(1) and Dy_(2)(L_1)_(2)(L_(3))_(2)(CH_(3)OH)_(2)·CH_(3)CN(2),where L_1,L_(2) and L_(3) represent the deprotonated form of 4-tert-butyl-2-(7-methoxybenzo[d]oxazol-2-yl)phenol,(E)-1-(((3,5-di-tert-butyI-2-hydroxyphenyI)imino)methyl)naphthalen-2-ol and(E)-2,4-di-tertbutyl-6-((2-hydroxybenzylidene)amino)*** tiny difference of the core structure of 1 and 2 is derived from the steric hindrance of Schiff base ligands L_(2) and L_(3).Dynamic magnetic measurements reveal that 1 and 2 show frequency-dependent out-of-phase alternating-current susceptibility signal peaks at different temperatures under zero dc field,diagnostic of single-molecule magnet *** experimental derived energy barrier to magnetization reversal for 1 and 2 is 108(1),47(2) and 33(3) *** initio CASSCF calculations performed on 1 and 2 suggest that the origin of the difference in magnetic properties originates from the variation in the single-ion anisotropy that arises due to minor structural ***,the equation to calculate the effective energy barrier for Dy_(2) proposed earlier is found to yield an excellent agreement with the experimental *** state fluorescence measurements performed on 1 and 2 demonstrate that both exhibit two ligands centered components of fluorescent emissive,in addition,with different emitting colors and chromaticity *** discrepancy of fluorescence and single molecule magnet behavior showed by 1 and 2 can be attributed to the steric hindrance effect of Schiff base ligands.

关键词： Fluorescent single-molecule magnets Dinuclear dysprosium complexes Mixed ligand Steric hindrance Theoretical calculations Rare earths

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Differential methylation landscape of pancreatic ductal adenocarcinoma and its precancerous lesions

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Hepatobiliary & Pancreatic Diseases International 2020年第3期19卷 205-217页

作者： Akash Bararia Subhankar dey Sumit Gulati Supriyo Ghatak Shibajyoti Ghosh Sudeep Banerjee Nilabja Sikdar Human Genetics Unit Indian Statistical InstituteKolkataIndia Department of Zoology New Alipore CollegeUniversity of CalcuttaKolkataIndia Department of Gastroenterological Surgery Calcutta Medical Research InstituteKolkataIndia Department of General Surgery Medical College and HospitalKolkataIndia Department of Gastrointestinal Surgery Tata Medical CenterRajarhatKolkataIndia

Background:Pancreatic cancer is one of the most lethal diseases with an incidence almost equal to the *** addition to having genetic causes,cancer can also be considered an epigenetic *** methylation is the premier epigenetic modification and patterns of aberrant DNA methylation are recognized to be a common hallmark of human *** the multistage carcinogenesis of pancreas starting from precancerous lesions to pancreatic ductal adenocarcinoma(PDAC),the epigenetic changes play a significant *** sources:Relevant studies for this review were derived via an extensive literature search in Pub Med via using various keywords such as pancreatic ductal adenocarcinoma,precancerous lesions,methylation profile,epigenetic biomarkers that are relevant directly or closely associated with the concerned area of our *** literature search was intensively done considering a time frame of 20 years(1998–2018).Result:In this review we have highlighted the hypermethylation and hypomethylation of the precancerous PDAC lesions(pancreatic intra-epithelial neoplasia,intraductal papillary mucinous neoplasm,mucinous cystic neoplasm and chronic pancreatitis)and PDAC along with the potential *** have also achieved the early epigenetic driver that leads to progression from precancerous lesions to PDAC.A bunch of epigenetic driver genes leads to progression of precancerous lesions to PDAC(pp ENK,APC,p14/5/16/17,h MLH1 and MGMT)are also *** summarized the importance of these observations in therapeutics and diagnosis of PDAC hence identifying the potential use of epigenetic biomarkers in epigenetic targeted *** inactivation occurs by hypermethylation of Cp G islands in the promoter regions of tumor suppressor *** listed all hyper-and hypomethylation of Cp G islands of several genes in PDAC including its precancerous ***:The concept of the review would help to understand their biological effects,and to determine

关键词： Pancreatic cancer Methylation CpG islands Epigenetic Biomarkers Precancerous lesions

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An EOQ model with backordering for perishable items under multiple advanced and delayed payments policies

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Journal of Management Analytics 2022年第3期9卷 403-434页

作者： Prasanta Kumar Ghosh Amalesh Kumar Manna Jayanta Kumar dey Samarjit Kar Department of Mathematics National Institute of Technology DurgapurDurgapurIndia Department of Mathematics The University of BurdwanBurdwanIndia Department of Mathematics Mahishadal Raj CollegePurba MedinipurIndia Department of Mathematics Y.S.Palpara MahavidyalayaPurba MedinipurIndia

This study investigated an economic order quantity (EOQ) model with completebackorder for fixed lifetime perishable items under multiple advance and delayedpayments policies. Here, a new type of business policy is consideredwhere supplieroffers the retailer to pay a fraction of the purchasing cost before the order deliverybymultiple equal installments starting from the ordering time and the rest amountafter the delivery by multiple equal installments. Here, some theoretical results areillustrated to determine the conditions of existence and uniqueness of the optimalsolutions. A closed form solution is determined to solve the proposed model underapproximation. Some numerical examples are provided to examine the validity ofthe proposed model. Finally, sensitivity analyses are presented to obtain the effectof optimal policy and provide some managerial insights of the model.

关键词： inventory perishable item expiry date advance payment delayed payment

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Fire monitoring in coal mines using wireless underground sensor network and interval type-2 fuzzy logic controller

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International Journal of Coal Science & Technology 2019年第2期6卷 274-285页

作者： Sweta Basu Sutapa Pramanik Sanghamitra dey Gautam Panigrahi Dipak Kumar Jana Prajnanananda Insitute of Technology & Management 94/2 Park Street Koi-17 Park Circus 7th point Kolkata WB 700 017 India Deulia Balika Vidyamandir Kolaghat 721154 India Department of Mathematics NIT Durgapur WB India Department of Applied Science Haldia Institute of Technology Haldia Purba Midnapur WB 721657 India

From the view of underground coal mining safety system, it is extremely important to continuous monitoring of coal mines for the prompt detection of fires or related problems inspite of its uncertainty and imprecise characteristics. Therefore, evaluation and inferring the data perfectly to prevent fire related accidental risk in underground coal mining (UMC) system are very necessary. In the present article, we have proposed a novel type-2 fuzzy logic system (T2FLS) for the prediction of fire intensity and its risk assessment for risk reduction in an underground coal mine. Recently, for the observation of underground coal mines, wireless underground sensor network (WUSN) are being concerned frequently. To implement this technique IT2FLS, main functional components are sensor nodes which are installed in coal mines to accumulate different imprecise environmental data like, temperature, relative humidity, different gas concentrations etc. and these are sent to a base station which is connected to the ground observation system through network. In the present context, a WUSN based fire monitoring system is developed using fuzzy logic approach to enhance the consistency in decision making system to improve the risk chances of fire during coal mining. We have taken Mamdani IT2FLS as fuzzy model on coal mine monitoring data to consider real-time decision making (DM). It is predicted from the simulated results that the recommended system is highly acceptable and amenable in the case of fire hazard safety with compared to the wired and off-line monitoring system for UMC. Legitimacy of the suggested model is prepared using statistical analysis and multiple linear regression analysis.

关键词： Type-2 fuzzy logic Underground coal mining system Mine environment Fire and risk monitoring of mine Wireless sensor networks Fire Intensity

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Elimination of Partial Overloading of Generators Under Unbalanced Operating Conditions of Power Systems

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CSEE Journal of Power and Energy Systems 2016年第1期2卷 81-87页

作者： Sudhakar Reddy Sama Subrata Paul Sunita Halder Nee dey Department of Technical Education Andhra PradeshIndia Department of Electrical Engineering Jadavpur UniversityKolkataIndia

Unbalanced operating condition in a power system can cause partial overloading of the generators in the network,a condition where one or two of the three phases of the generator become overloaded even if the total 3-phase power output of the generator is within its specified *** overloading of generators beyond certain limits is undesirable and must be *** systems are often subjected to highly unbalanced operating *** of distributed generations(DGs),therefore,has rendered today’s distribution systems quite susceptible to this *** of this problem requires the issue to be addressed properly during analysis,operation and planning of such ***,operation and planning of power networks under unbalanced operating condition require 3-phase load flow *** existing methods of 3-phase load flow are not equipped to take into account any limit on the loadings of the individual phases of the *** the present work,a methodology based on NewtonRaphson(N-R)3-phase load flow with necessary modifications is *** proposed methodology is able to determine the safe loading limits of the generators,and,can be adopted for operation and planning of power networks under unbalanced operating conditions to overcome the above *** results on IEEE-37 bus feeder network are presented to demonstrate the effectiveness of the proposed method.

关键词： Newton Raphson 3-phase load flow partial overloading of generators unbalanced operating condition of power systems

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Effect of Temperature and Ionic Concentration on Self-Assembled Films of Chicago Sky Blue

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Chinese Physics Letters 2008年第10期25卷 3732-3734页

作者： D. dey M. N. Islam S. A. Hussain D. Bhattacharjee Department of Physics Tripura University Suryamaninagar-799130 Tripura India

We employ a layer-by-layer adsorption technique for deposition on solid substrates of polyionic films of Chicago Sky Blue. Film growth was significant with the increasing number of layers. Photochemical properties of these films are investigated for different ionic concentrations. A significant blue shift is observed with the increasing ionic strength of the solution, suggesting the formation of aggregation. Temperature effect studies show some preferable reorientation of molecules in the film during cooling process. Most remarkable observation is that the absorption intensity is the highest for a particular degree of inclination. Deposition time is fixed at 15rain because adsorption kinetics results show saturation after 15 min.

关键词： the power-law exponents precipitation durative abrupt precipitation change

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