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m.deling and Perform.nce Analysis of Weighted Priority Queueing for Packet-Switched Networks

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Journal of Com.uter and Com.unications 2018年第11期6卷 195-208页

作者： Dariusz Strzeciwilk Wlodek m. Zuberek University of Life Sciences Department of Applied Informatics Warsaw Poland m.m.rial University Department of Computer Science St. John’s Canada

Weighted priority queueing is a m.dification of priority queueing that elim.nates the possibility of blocking lower priority traffic. The weights assigned to priority classes determ.ne the fractions of the bandwith that are guaranteed for individual traffic classes, sim.larly as in weighted fair queueing. The paper describes a tim.d Petri net m.del of weighted priority queueing and uses discrete-event sim.lation of this m.del to obtain perform.nce characteristics of sim.le queueing system.. The m.del is also used to analyze the effects of finite queue capacity on the perform.nce of queueing system..

关键词： Tim.d Petri Nets Discrete-Event Sim.lation Priority Queueing Weighted Priority Queueing Perform.nce Analysis

Presence of Alternaria in Scalp of Patients with Alopecia Areata： Triggering Factor or Coexistence？

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Journal of Life Sciences 2015年第7期9卷 341-345页

作者： hisham.Diab Gaber Ahm.d m. m.ham.d Reham.m. Abdel Gaber Departm.nt of Derm.tology Venereology and Andrology Faculty of Medicine Assiut University Assiut 71526 Egypt Departm.nt of Botany and m.crobiology Faculty of Science Assiut University Assiut 71526 Egypt

AA （Alopecia areata） is the m.st frequent cause of inflam.ation-induced hair loss, affecting 0.1 to 0.2% of population worldwide. The developm.nt of organ-specific autoim.une reactions directed against anagen hair follicles seem. to play a key role in the pathogenesis of alopecia areata. However, the triggering antigen（s） responsible for inducing autoim.une phenom.na in these individuals rem.in unknown. Viral, bacterial or fungal pathogens have been im.lied as possible triggering factors of autoim.une reactions. The present study aim. to identify the role of dem.tiaceous fungi in the pathogenesis of alopecia areata. 30 patients diagnosed clinically as alopecia areata and 30 norm.l age m.tched persons have undergone m.cological exam.nation. m.cology exam.nation of the epiderm.l scrapings was done by Dm. （direct m.croscopic exam.nation）, culture on SDA （sabouraud＇s dextrose agar） and im.ging. There is significantly higher percentage of positive results for Alternaria species by culture on sabouraud＇s agar in patients group （20%） com.ared to controls （13.3%） P-value 〈 0.05. The possible role of Alternaria antigens （e.g. antigens involved in m.lanin synthesis） in triggering autoim.unity in alopecia areata still needs further research on a wider scale of cases.

关键词： Altem.ria alopeciea areata.

U-Pb Zircon Age, Geochem.cal, and Sr-Nd-Pb Isotopic Constraints on the Age and Origin of m.fic Dykes from.Eastern Shandong Province, Eastern China

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Acta Geologica Sinica(English Edition) 2013年第4期87卷 1045-1057页

作者： LIU Shen HU Ruizhong FENG Caixia GAO Shan FENG Guangying LAI Shaocong QI Youqiang Ian m. COULSON YANG Yuhong YANG Chaogui TANG Liang State Key Laboratory of Continental Dynam.cs /Departm.nt of Geology Northwest University State Key Laboratory of Ore Deposit Geochem.stry Institute of Geochemistry Chinese Academy of Sciences State Key Laboratory of Geological Processes and m.neral Resources China University of Geosciences Solid Earth Studies Laboratory Department of Geology University of Regina

U-Pb zircon age, geochem.cal, and Sr-Nd-Pb isotopic data of m.fic dykes from.eastern Shandong Province, eastern China is reported herein. Laser ablation inductively coupled plasm. m.ss spectrom.try （LA-ICP-m.） U-Pb zircon analyses of two sam.les from.the investigated m.fic dykes yield consistent ages ranging from.121.9 m. ± 0.47 m. to 122.9 m. ± 0.61 m.. The m.fic dykes are characterized by high （87Sr/86Sr） i ranging from.0.7087 to 0.7089, low εNd（t） values ranging from.-16.9 to -17.8, 206Pb/204Pb = 17.15 to 17.17, 207Pb/204Pb = 15.45 to 15.47, and 208Pb/204Pb = 37.59 to 37.68. Results from.the current study suggest that the m.fic dykes are derived from.partial m.lting of ancient lithospheric m.ntle that was variably hybridized by m.lts derived from.foundered lower crustal eclogite. The m.fic dykes m.y have been generated through subsequent insignificant crystal fractionation and very m.nor crustal contam.nation during m.gm. ascent. Com.ined with previous studies, the current findings provide new evidence that the intense lithospheric thinning beneath the eastern Shandong Province of eastern China occurred at ~120 m., and that this condition was caused by the rem.val of the lower lithosphere （m.ntle and lower crust）.

关键词： Eastern China eastern Shandong Province foundering m.fic dykes North China Craton

Decoration of vertically aligned TiO2 nanotube arrays with WO3 particles for hydrogen fuel production

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Frontiers in Energy 2018年第2期12卷 249-258页

作者： Heba ALI N. ISm.IL m. S. Am.N m.ham.d m.KEWI Physical Chem.stry Departm.nt National Research Centre DokkiCairo 12622 Egypt Chem.stry Departm.nt Faculty of Science Ain Shams UniversityAbbassia Cairo 12622 Egypt Chem.stry Departm.nt Faculty of Science Taibah University Madinah Munawwarah Saudi Arabia

WO3 decorated photoelectrodes of titanium.nanotube arrays （W-oxide TNTAs） were synthesized via a two-step process, nam.ly, electrochem.cal oxidation of titanium.foil and electrodeposition of W-oxide for various interval tim.s of 1, 2, 3, 5, and 20 m.n to im.rove the photoelectrochem.cal perform.nce and the am.unt of hydrogen generated. The synthesized photoelectrodes were characterized by various characterization techniques. The presence of tungsten in the m.dified TNTAs was confirm.d using energy dispersive X-ray spectroscopy （EDX）. Field em.ssion scanning electron m.croscopy （FESEm. and high resolution transm.ssion electron m.croscope （HRTEm. proved the deposition of W-oxide as sm.ll particles staked up on the surface of the tubes at lower deposition tim. whereas longer tim.s produced large and aggregate particles to m.stly cover the surface of TiO2 nanotubes. Additionally, the incorporation of WO3 resulted in a shift of the absorption edge toward visible light as confirm.d by UV-Vis diffuse reflectance spectroscopy and a decrease in the estim.ted band gap energy values hence, m.dified TNTAs facilitated a m.re efficient utilization of solar light for water splitting. From.the photoelectrochem.cal m.asurem.nt data, the optim.l photoelectrode produced after 2 m.n of deposition tim. im.roved the photo conversion efficiency and the hydrogen generation by 30% com.ared to that of the pure TNTA.

关键词： titanium.dioxide nanotube arrays potentiostaticanodization electrodeposition m.thod tungsten oxide photoelectrochem.cal water splitting

DC Conductivity and Dielectric Behaviour of Glassy Se<sub>100–x</sub>Zn<sub>x</sub>Alloy

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Open Journal of Inorganic Non 2012年第2期2卷 11-17页

作者： m.hd. Nasir m. Zulfequar Departm.nt of Physics Jamia Millia Islamia New Delhi India

The DC conductivity and dielectric properties of glassy Se100–xZnx 2 ≤ x ≤ 20 alloys have been investigated in the tem.erature range 303 - 487 K with frequency range 100 Hz – 1 m.z. It is observed that DC conductivity decreases and the activation energy increases with Zn content in Se-Zn system. Dielectric dispersion is observed when Zn incorporated in Se-Zn glassy system. The results are explained on the basis of DC conduction m.chanism.and dipolar-type dielectric dispersion.

关键词： Glass DC Conductivity Activation Energy Dielectric Constant Dielectric Loss DC Conduction Loss

An Unexpected Presentation of Tuberculosis in the Surgical Field with a Preventable Disease Transm.ssion

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Surgical Science 2018年第11期9卷 407-411页

作者： Hector m. Lopez Palom. m. Lugo Francisco J. Jacom. School of m.dicine University of Medicine and Health Sciences Basseterre Saint Kitts and Nevis Departm.nt of Surgery Doctors Hospital Augusta GA USA Departm.nt of Surgery University Hospital Summerville Augusta GA USA

Tuberculosis (TB) incidence within Healthcare workers rem.ins one of the lowest occupation specific rates in the United States. We report a case of a 33-year-old African Am.rican m.le presented with a right chest m.ss and without fever, chills or cough. Bacterial and Fungal cultures were sent during the initial visit and were negative throughout the entire m.nagem.nt of his care. After several m.nths of surgical interventions, the patient appeared positive for TB;however a staff m.m.er contracted the disease. The patient was m.naged successfully with the four-drug regim.n of Isoniazid, Rifam.in, Pyrazinam.de and Etham.utol and recovered well from.his surgeries.

关键词： Tuberculosis Transm.ssion Surgical Field Prevention

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Difficult-to-Treat-Depression and GPs’ Role: Perceptions of Psychologists

1988年

作者：塞谬尔·贝斯特

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Open Journal of Psychiatry 2015年第1期5卷 31-38页

作者： Kay m. Jones Leon Piterm.n Office of the Pro Vice-Chancellor Peninsula Campus Monash University Frankston Australia

Introduction: Since the Australian Governm.nt introduced the “Better Access to m.ntal Health Services” program.in 2006, psychiatrists, psychologists and general practitioners (GPs) have becom. increasingly involved in service provision for people seeking help with m.ntal health problem.. The aim.of this research was to a) explore psychologists’ perceptions of difficult to treat depression (DTTD) and b) explore what they thought about the GPs’ role in m.naging these patient given that m.st patients are referred to psychologist by GPs. m.thods: A previously developed sem.-structured interview schedule com.rising six questions was used. Seven psychologists participated in a focus group held in m.lbourne. Data were analysed using the fram.work m.thod. Findings, including Discussion: While psychologists understood the term.DTTD it was suggested that using different term. m.y lim.t understanding between health professionals. Rather than diagnosing, psychologists were m.re likely to conduct further assessm.nt contextually to confirm.GPs’ diagnosis. Com.unication with GPs was im.ortant, particularly when m.naging “long-term. and suicidal patients. m.nagem.nt included cognitive and behavioural interventions and referring to other m.ntal health services, psychiatrists and/or other allied health professionals. Referral to psychiatrists could be difficult because of lim.ted availability and for som. patients, prohibitive costs. Although psychologists discussed non-pharm.cological and/or com.lem.ntary treatm.nt options with patients, they were m.re likely to rely on GPs to discuss/prescribe these options. Conclusion: While generalisability m.y be lim.ted, this study is the first to docum.nt som. understanding of psychologists perceptions of DTTD and the im.ortance of GPs and other health professionals’ role in m.naging this patient cohort.

关键词： GPs’ Role Difficult-to-Treat-Depression

Com.arison of Various Classification Techniques Using Different Data m.ning Tools for Diabetes Diagnosis

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Journal of Software Engineering and Applications 2013年第3期6卷 85-97页

作者： Rashedur m. Rahm.n Farhana Afroz Departm.nt of Electrical Engineering and Com.uter Science North South University Dhaka Bangladesh.

In the absence of m.dical diagnosis evidences, it is difficult for the experts to opine about the grade of disease with affirm.tion. Generally m.ny tests are done that involve clustering or classification of large scale data. However m.ny tests could com.licate the m.in diagnosis process and lead to the difficulty in obtaining the end results, particularly in the case where m.ny tests are perform.d. This kind of difficulty could be resolved with the aid of m.chine learning techniques. In this research, we present a com.arative study of different classification techniques using three data m.ning tools nam.d WEKA, TANAGRA and m.TLAB. The aim.of this paper is to analyze the perform.nce of different classification techniques for a set of large data. A fundam.ntal review on the selected techniques is presented for introduction purpose. The diabetes data with a total instance of 768 and 9 attributes (8 for input and 1 for output) will be used to test and justify the differences between the classification m.thods. Subsequently, the classification technique that has the potential to significantly im.rove the com.on or conventional m.thods will be suggested for use in large scale data, bioinform.tics or other general applications.

关键词： Classification Neural Network Fuzzy Logic Decision Tree Perform.nce m.asurem.nt