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Projection of Future Precipitation and Temperature Change over the Transboundary Koshi River Basin Using Regional Climate Model PRECIS

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Atmospheric and Climate Sciences 2018年第2期8卷 163-191页

作者： Rupak Rajbhandari Arun Bhakta Shrestha Santosh Nepal shahriar Wahid Department of Meteorology Tri-Chandra Campus Tribhuvan University Kathmandu Nepal International Centre for Integrated Mountain Development Kathmandu Nepal

The Koshi river basin sustains the livelihoods of millions of people in the upstream and downstream areas of the basin. People rely on monsoon rainfall for agricultural production, hydropower generation and other livelihood activities. Climate change is expected to have serious implication on its environment. To reduce the adverse impacts of disasters and to better understand the implication of climate change for the sustainable development, initiative in this regard is necessary. Analysis of past meteorological trends and future climate projections can give us a sense of what to expect and how to prepare ourselves and manage available resources. In this paper, we have used a high-resolution climate model, viz., Providing REgional Climates for Impacts Studies (PRECIS), to project future climate scenario over the Koshi river basin for impact assessment. Three outputs of the Quantifying Uncertainties in Model Prediction (QUMP) simulations have been used to project the future climate. These simulations were selected from the 17-member Perturbed Physics Ensemble (PPE) using Hadley Centre Couple Model (HadCM3) based on the IPCC SRES A1B emission scenario. The future projections are analysed for three time slices 2011-2040 (near future), 2041-2070 (middle of the century) and 2071-2098 (distant future). Despite quantitative wet and cold bias, the model was able to resolve the seasonal pattern reasonably well. The model projects a decrease in rainfall in the near future and a progressive increase towards the end of the century. The projected change in rainfall is non-uniform, with increase over the southern plains and the middle mountains and decrease over the trans-Himalayan region. Simulation suggests that rainy days will be less frequent but more intense over the southern plains towards the end of the century. Further, the model projections indicate significant warming towards the end of the century. The rate of warming is slightly higher over the trans-Himalayan region

关键词： Future Climate Climate Projection PRECIS Koshi Himalaya

Influence of Ni substitution on structural,morphological,dielectric,magnetic and optical properties of Cu-Zn ferrite by double sintering sol–gel technique

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Journal of Advanced Dielectrics 2019年第2期9卷 63-71页

作者： Mohammad Sajjad Hossain Yeasmin Akter Mohammad Shahjahan Muhammad shahriar Bashar MostHosney Ara Begum mdMoazzem Hossain Suravi Islam Nazia Khatun mdAl-Mamun Industrial Physics Division BCSIR Laboratories Dhaka BCSIRDhaka-1205Bangladesh Department of Physics University of Chittagong Chottogram-4331Bangladesh Institute of Fuel Research and Development BCSIR Dhaka-1205Bangladesh Bangladesh Atomic Energy Centre BAEC Dhaka-1000Bangladesh

Polycrystalline NiCuZn ferrite(Ni_(x)Cu_(0.3)Zn(0.7-x)Fe_(2)O_(4);x=0.2,0.3,0.4 and 0.5)were prepared through solgel auto combustion method applying double sintering ***,morphological,elemental analyses(EDS),Fourier-transform infrared spectroscopy(FTIR),Direct Current(DC)electrical resistivity,dielectric,magnetic and optical properties of prepared samples were *** profiles reveal the formation of simple cubic spinel structure without any traceable *** average crystallite size lies within the range of 22–29 *** parameter decreases with increasing Ni *** temperature DC resistivity was recorded from 6:39×10^(5)to 3:79×10^(5)Ω*** dielectric constant(ε)and loss factor(tanδ)were decreased with increase of frequency while AC conductivity *** absorption peak occurred at three different frequency ranges at 570-577 cm^(-1),1635-1662 cm^(-1)and 3439–3448 cm^(-1).Magnetic properties were investigated by using vibrating sample magnetometer(VSM).Decreasing trends were observed for saturation magnetization(Ms),magnetic coercivity(Hc)and remanant magnetization(Mr)with the increase of Ni *** band gap(-2.70-2.79 eV)were calculated from diffuse reflectance data by using Kubelka–Munk function.

关键词： Sol-gel NiCuZn ferrite FTIR DC resistivity dielectric optical properties

A Study on the Effects of Solar Tracking Systems on the Performance of Photovoltaic Power Plants

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Journal of Power and Energy Engineering 2014年第4期2卷 718-728页

作者： shahriar Bazyari Reza Keypour Shahrokh Farhangi Amir Ghaedi Khashayar Bazyari Semnan University Semnan Iran University of Tehran Tehran Iran Darun Branch Islamic Azad University Shiraz Iran Sharif University of Technology Tehran Iran

The use of renewable energy resources to produce the electricity is a rising trend in various countries worldwide. This is especially because these energies do not produce the greenhouse gases;therefore, don’t become a destructive factor on the ozone layer and the environment. Besides, the fossil energies are always exposed to price changes and will eventually end, while the renewable energies don’t pose such problems and are freely acquired from the nature. Some of the most important of these reproducible energy resources are the energies of the wind and the solar energy. The generation capability of a photovoltaic power plant is largely dependent on the intensity of the sun radiation. On the other hand, the changing of position causes the sun to have a variable shining intensity in different seasons and different times of the year;therefore, some of the solar power plants possess solar tacking systems. This paper studies the different types of photovoltaic systems including fixed panel, photovoltaic farms equipped to the single axis and double axis tracking systems and their effects on the performance of the solar power plants. In order to determine the position of the sun in the sky, the zenith and azimuth angles of it are used to extract the relations between the different parameters of the sun radiation. The resulted parameters are used in the modeling of the single axis and double axis systems. In the paper it is utilized from the sun parameters in Qeshm Island of Iran in the summer of 2011.

关键词： Azimuth and Zenith Angles Photovoltaic Farm Single and Double Axis Sun Tracker Systems

Implementation of Downloadable File Protection Using MAC Address

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Implementation of Downloadable File Protection Using MAC Add...

Flavonoids from the Leaves of <i>Bridelia stipularis</i>with <i>in Vitro</i>Antioxidant and Cytotoxicity Activity

2011 IEEE International Conference on Information Theory and Information Security(ICITIS 2011)

作者： Safiollah Heidari shahriar Mohammadi Sadeq Heidari Information Technology Department of K. N. Toosi University of Technology

With the increasing usage of Internet and electronic commerce and share files systems, the need to provide solutions for safer environment and protecting electronic assets is felt more than ever. On the other hand, laws like copyright which protect moral rights of people against stealing their works such as books, paints, music, etc. also face with challenging issues in electronic environments. So, we see statistics on the rise about plagiarism and art theft in virtual spaces. Yet, so many different methods have been represented for protecting files against misuses, include watermarking, cryptography, steganography, etc. In this paper, a new method for protecting and accessing files for buyers in electronic sales is represented. It entails change in files structure using MAC （Media Access Control） address of a computer system, because MAC address is one of the unique properties of a system. Also, some changes in client/server system designing is needed. This method can prevent unauthorized access to the files and it can be use for stabilizing copyright law. This paper, also provides an example of implementing proposed system that will help to explain and understand this method.

关键词： File Protection Client/Server File Download MAC Address

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Pharmacology & Pharmacy 2020年第7期11卷 137-146页

作者： Sangita Debnath Puja Kazi Ruhullah shahriar Choudhury Mahmood Hasan Monira Ahsan Department of Pharmaceutical Chemistry University of Dhaka Dhaka Bangladesh Department of Pharmacy State University of Bangladesh Dhaka Bangladesh

Methanolic extract of the leaves of Bridelia stipularis was studied. From this study, we isolated three known flavonoids. They were identified as 7-O-methyl luteolin, apigenin and 5, 7, 2’, 5’ tetrahydroxyflavone by NMR spectroscopic studies. All of them are first time documented for this plant. Different solvent fractions were subjected to in vitro antioxidant and cytotoxicity studies. Both apigenin and ethyl acetate soluble fraction of Bridelia stipularis showed strong antioxidant activity having IC50 value of 8.005, 8.77 μg/mL respectively. Chloroform soluble fraction of Bridelia stipularis exerted the highest toxicity to brine shrimp and petroleum ether soluble fraction showed moderate toxicity having LC50 value of 1.05, 1.71 μg/mL respectively.

关键词： Bridelia stipularis Flavonoid Antioxidant Cytotoxicity

Mental health disorders in child and adolescent survivors of post-war landmine explosions

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Military Medical Research 2015年第4期3卷 201-206页

作者： Mohammad Ali Hemmati Hamid Shokoohi Mehdi Masoumi shahriar Khateri Mohammadreza Soroush Ehsan Modirian Mahtab Poor Zamany Nejat Kermany Maryam Hosseini Batool Mousavi Janbazan Medical and Engineering Research Center (JMERC) Department of Emergency Medicine George Washington University Emergency Department Medical FacultyQazvin University of Medical Sciences Anesthesiology and Critical Care Labbafinejad Hospital Medical University of Shahid Beheshti Community and Preventive Medicine Janbazan Medical and Engineering Research Center(JMERC)

Background: To describe the mental health status of 78 child and adolescent survivors of post-war landmine ***: Child and adolescent survivors of landmine explosions who were younger than 18 years old at the time of the study were identified and enrolled in this study. The mental health status of the participants was assessed by general health assessment and psychiatric examinations. Psychiatric assessment and diagnosis were undertaken using the Diagnostic and Statistical Manual for mental disorders(DSM-IV) criteria. A psychiatrist visited and interviewed each survivor and identified psychiatric ***: Seventy-eight child and adolescent survivors with a mean age of 16.11±2 years old were identified and agreed to participate in the study. The mean age of the victims at the time of injury was 8.2±3.12 years old(range 2–15). Thirty-seven(47.4%) of the adolescent survivors suffered from at least one psychiatric disorder. Twenty-nine survivors(37.1%) were newly diagnosed and needed to start medication and psychiatric treatment. The most common findings were anxiety disorders(34.6%), including posttraumatic stress disorder(PTSD) in 20(25.6%), and generalized anxiety disorder(GAD) in 7(9%) subjects. Mild-Moderate depression was found in 5(6.4%) subjects. No personality disorders were observed, and two patients suffered from mental retardation. The study results revealed a significant association between age of casualty, duration of injury and limb amputation, and types of psychological ***: Child and adolescent survivors of landmine explosions had a high prevalence of psychiatric disorders.

关键词： Landmine Child survivors Depression Anxiety Iran

Alpha-fetoprotein specific CD4 and CD8 T cell responses in patients with hepatocellular carcinoma

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World Journal of Hepatology 2010年第7期2卷 256-260页

作者： shahriar Behboudi Stephen P Pereira UCL Institute of Hepatology University College LondonRoyal Free Hospitals

The presence of CD8 T cell responses to tumor associated antigens have been reported in patients with different malignancies. However, there is very little inf ormation on a comparable CD8 and CD4 T cell response to a tumor antigen in liver cancer patients. Here, we re-examine the kinetic and the pattern of T helper 1 and cytotoxic T lymphocyte responses to alpha-fetoprotein (AFP),a tumor rejection antigen in hepatocellular carcinoma (HCC). Then, we discuss the possibility of using AFP-based immunotherapy in combination with necrotizing treatments in HCC patients.

关键词： Hepatocellular carcinoma Alpha-fetoprotein Cell-mediated immunity Immunotherapy

Screening for asymptomatic chlamydia and gonorrhea in adolescent males in an urban pediatric emergency department

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World Journal of Clinical Pediatrics 2017年第3期6卷 154-160页

作者： Megan E Maraynes Jennifer H Chao Konstantinos Agoritsas Richard Sinert shahriar Zehtabchi Ochsner Medical Center University of Queensland SUNY Downstate Medical Center and the Kings County Hospital Center

AIM To determine the prevalence of Chlamydia trachomatis(CT) and Neisseria gonorrhea(GC) in young men seeking care in the emergency department(ED) for non-sexually transmitted infection(STI) related *** This was a prospective, cross-sectional study in an urban ED. The main outcome was the rate of positive CT and GC on urine nucleic acid amplification testing in males aged 16-21 presenting with non-STI related complaints. RESULTS Two hundred and eighty-four patients were enrolled, 271 were included in the final data analysis [age range 16-21, median: 18(quartiles 16-18, 19-21)]. Overall, 17(6.3%, 95%CI: 4%-10%) tested positive for CT and 0%(95%CI: 0%-2%) were found to have GC. The proportion of sexually active subjects was 71%(95%CI: 65%-76%) and 2%(95%CI: 0.6%-4%) reported sex with men. Previous STI testing was reported in 46%(95%CI: 43%-54%) and 13%(95%CI: 8%-20%) of those patients previously tested had a history of STI. Of the patients who tested positive for CT in the ED, 88%(95%CI: 64%-98%) were successfully followed up. CONCLUSION The prevalence of CT infection found by screening was 6.3%. Screening and follow-up from the ED was successful. The findings justify routine STI screening in male adolescents presenting to the ED with non-STI related complaints.

关键词： Chlamydia Gonorrhea Adolescent Public health Emergency department Pediatric

新型雄激素受体种系错义突变与非裔男性家族性前列腺癌

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Asian Journal of Andrology 2010年第3期12卷 336-343,I0008,I0009页

作者： Si-Yi Hu Tao Liu Zhen-Zhen Liu Elisa Ledet Cruz Velasco-Gonzalez Diptasri M Mandal shahriar Koochekpour Stanley S Scott Cancer Center Louisiana State University Health Sciences Center New Orleans LA 70112 USA Department of Genetics Louisiana State University Health Sciences Center New Orleans LA 70112 USA School of Public Health Louisiana State University Health Sciences Center New Orleans LA 70112 USA 4Department of Microbiology and Immunology Department of Urology Department of Biochemistry and Molecular Biology Louisiana State University Healt Sciences Center New Orleans LA 70112 USA

Race, family history and age are the unequivocally accepted risk factors for prostate cancer （PCa）. Androgen receptor （AR）-dependent signaling is an important element in prostate carcinogenesis and its progression to metastatic disease. We examined the possibility of genomic changes in the AR in association with familial PCa in African Americans who have a higher incidence and mortality rate and a clinically more aggressive disease presentation than Caucasians. Genomic DNAs of 60 patients from 30 high-risk African American and Caucasian families participating in the Louisiana State University Health Sciences Center genetic linkage study of PCa were studied. Exon-specific polymerase-chain reaction, bi-directional automated sequencing and restriction enzyme genotyping were used to analyze for mutations in the coding region of the AR gene. We identified a germline AR （A1675T）（T559S） substitution mutation in the DNA-binding domain in three PCa-affected members of an African- American family with a history of early-onset disease. The present study describes the first AR germline mutation in an African-American family with a history of familial PCa. The AR （T559S） mutation may contribute to the disease by altering AR DNA-binding affinity and/or its response to androgens, non-androgenic steroids or anti-androgens. Additional studies will be required to define the frequency and contribution of the AR （A 1675T） allele to early-onset and/or familial PCa in African Americans.

关键词： African Americans androgen receptor familial prostate cancer germline mutation