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| 1 | Cloud data auditing with designated verifier显示文摘一个审计的计划是证明采购到云的主人数据被使未经触动的一个好方法,并且能够给公共可证实性服务的一个计划是一些研究人员设法造最后几年了的一种好选择。然而,在一个公共审计计划,所有人做数据和一些分泌信息到公共验证器的漏的可能性的确认是数据主人是 unhappywith 的一个问题这种情形。例如,数据主人不想要任何人对另外知道他把数据在云服务者存储了。由与审计系统的公众联系的隐私的问题激发了,我们建议了审计的一个指明的验证器(DVA ) 基于 Steinfeld 策划 et al.s 通用指明的验证器(DV ) 签名计划。我们的 DVA 计划与私人确认能力授权一个第三方听者。因为计划包含验证器的私人钥匙,它提供私人确认。而且,我们在场审计计划改善审计效率的批。通过严密安全分析,我们证明我们的计划在假设计算 Diffie-Hellman (CDH ) 问题在双线性的地图的组上是难的随机的 oraclemodel 是 provably 安全的。 | Solomon Guadie WORKU Chunxiang XU Jining ZHAO | 2014 | Frontiers of Computer Science2014，8，3： | 4 |
| 2 | Comprehensive review and performance evaluation of maximum power point tracking algorithms for photovoltaic system显示文摘A photovoltaic array is environmentally friendly and a source of unlimited energy generation.However,it is presently a costlier energy generation system than other non-renewable energy sources.The main reasons are seasonal variations and continuously changing weather conditions,which affect the amount of solar energy received by the solar panels.In addition,the non-linear characteristics of the voltage and current outputs along with the operating environment temperature and variation in the solar radiation decrease the energy conversion capability of the photovoltaic arrays.To address this problem,the global maxima of the PV arrays can be tracked using a maximum power point tracking algorithm(MPPT)and the operating point of the photovoltaic system can be forced to its optimum value.This technique increases the efficiency of the photovoltaic array and minimizes the cost of the system by reducing the number of solar modules required to obtain the desired power.However,the tracking algorithms are not equally effective in all areas of application.Therefore,selecting the correct MPPT is very critical.This paper presents a detailed review and comparison of the MPPT techniques for photovoltaic systems,with consideration of the following key parameters:photovoltaic array dependence,type of system(analog or digital),need for periodic tuning,convergence speed,complexity of the system,global maxima,implemented capacity,and sensed parameter(s).In addition,based on real meteorological data(irradiance and temperature at a site located in Addis Ababa,Ethiopia),a simulation is performed to evaluate the performance of tracking algorithms suitable for the application being studied.Finally,the study clearly validates the considerable energy saving achieved by using these algorithms. | Asegid Belay Kebede Getachew Biru Worku | 2020 | Global Energy Interconnection2020，3，4： | 3 |
| 3 | Treatment outcomes of tuberculosis patients under directly observed treatment short-course at Debre Tabor General Hospital,northwest Ethiopia:nine-years retrospective study显示文摘Background:Data regarding tuberculosis(TB)treatment outcomes,proportion of TB/HIV co-infection and associated factors have been released at different TB treatment facilities in Ethiopia and elsewhere in the world as part of the auditing and surveillance service.However,these data are missing for the TB clinic offering directly observed treatment short-course(DOTs)at Debre Tabor General Hospital(DTGH).Methods:The authors analysed the records of 985 TB patients registered at the DTGH from September 2008 to December 2016.Data on patients’sex,age,type of TB,and treatment outcomes were extracted from the TB treatment registration logbook.The treatment outcome of patients was categorized according to the National TB and Leprosy Control Program guidelines:cured,treatment completed,treatment failed,died,and not evaluated(transferred out and unknown cases).Results:Around half of the registered patients were males(516,52.4%).In terms of TB types,381(38.7%),241(24.5%),and 363(36.9%)patients had smear-negative pulmonary TB,smear-positive pulmonary TB,and extra pulmonary TB,respectively.Six hundred and seventy-two patients(90.1%)had successful treatment outcomes(cured and treatment completed),while 74 patients(9.9%)had unsuccessful treatment outcomes(death and treatment failure).TB treatment outcome was not associated with age,sex,type and history of TB,or co-infection with HIV(P>0.05).The proportion of TB/HIV co-infection was at 24.2%,and these were found to be significantly associated with the age groups of 25-34,35-44 and≥65 years:(aOR:0.44;95%CI:0.25-0.8),(aOR:0.39;95%CI:0.20-0.70),(aOR:4.2;95%CI:1.30-12.9),respectively.Conclusions:The proportion of patients with successful treatment outcomes was above the World Health Organization target set for Millennium Development Goal of 85%and in line with that of the global milestone target set at>90%for 2025.Relatively higher proportions of transfer-out cases were recorded in the present study.Similarly,the proportion of TB/HIV co-infection cases was much higher than the national average of 8%.Thus,the health facility under study should develop strategies to record the final treatment outcome of transfer-out cases.In addition,strategies to reduce the burden of TB/HIV co-infection should be strengthened. | Seble Worku Awoke Derbie Daniel Mekonnen Fantahun Biadglegne | 2018 | Infectious Diseases of Poverty2018，7，1： | 3 |
| 4 | TG F- beta inhibits vascular srooth muscle cell proliferation through down regulation of cyclin A 显示文摘 | Sakakibara K Kubota K Worku B | 2003 | Surg Res2003，114，： | 2 |
| 5 | Identification of system vulnerabilities in the Ethiopian electric power system显示文摘The Ethiopian Electric Power(EEP) has been operating and managing the national interconnected power system with dispersed and geographically isolated generators, a complex transmission system and loads. In recent years, with an increasing load demand due to rural electrification and industrialization, the Ethiopian power system has faced more frequent, widely spread and long lasting blackouts. To slash the occurrence of such incidents, identifying the system vulnerabilities is the first step in this direction. In this paper, the vulnerability assessment is performed using indices called active power performance index(PIp) and voltage performance index(PIv). These indices provide a direct means of comparing the relative severity of the different line outages on the system loads and voltage profiles. Accordingly, it is found that the most severe line outages are those lines that interconnect the high load centered(Addis Ababa and Central regions) with the rest of the regional power systems. In addition, the most vulnerable buses of the network in respect of voltage limit violations are mainly found at the high load centers. | Moges Alemu Tikuneh Getachew Biru Worku | 2018 | Global Energy Interconnection2018，1，3： | 2 |
| 6 | Fifteen‐Year Experience and Outcomes of Pericardiectomy for Constrictive Pericarditis显示文摘 | Dimitrios Avgerinos Yuri Rabitnokov Berhane Worku Siyamek Neragi‐Miandoab Leonard N. Girardi | 2014 | J Card Surg2014，，4： | 2 |
| 7 | Analgesic and anti-inflammalory effects of essential oils of Eucalyptus 显示文摘 | Jeane Silva Worku Abebe S M Sousa | 2003 | Journal of Ethnopharmacology2003，89，： | 1 |
| 8 | Suppressiveness to clubroot pea root rot and Fusaritm wilt in Swedish soils显示文摘 | Worku Y Gerhardson B | 1996 | J Phytopathol1996，，144： | 1 |
| 9 | Diagnosis of ischemic heart disease using CK-MB,troponin-Ⅰ and ischemia modified albumin显示文摘 | Dawie J Chawla R Worku Y | | 0，，： | 1 |
| 10 | Regulation of IDO-media- ted bacteriostasis in macrophages~ Role of antibiotics and anti-in- flammatory agents 显示文摘 | MacKenzie CR Worku D Daubener W | 2003 | Adv Exp Med Biol2003，527，： | 1 |
| 11 | Enzymatic activity of Lactobacillus reuteri grown in a sweet potato based medium with the addition of metalions 显示文摘 | Hayek S A Shahbazi A Worku M | 2013 | Springerplus2013，，2： | 1 |
| 12 | PDGF-BB regulates p27 expression through ERK-clependent BNA turn-over in vascular smooth muscle cells 显示文摘 | Sakakibara K Kubota K Worku B | 2005 | J Biol Chem2005，280，25： | 1 |
| 13 | Diagnosis of is- chemic heart disease using CK-MB, troponin-I and is- chemia modified albumin 显示文摘 | Dawie J Chawla R Worku Y | 2011 | Ethiop Med J2011，49，1： | 1 |
| 14 | Improving immunization capacity in Ethiopia through continuous quality improvement interventions:a prospective quasi-experimental study显示文摘Background:Strong scientific evidence is needed to support low-income countries in building effective and sustainable immunization programs and proactively engaging in global vaccine development and implementation initiatives.This study aimed to implement and evaluate the effectiveness of system-wide continuous quality improvement(CQI)interventions to improve national immunization programme performance in Ethiopia.Methods:The study used a prospective,quasi-experimental design with an interrupted time-series analysis to collect data from 781 government health sectors(556 healthcare facilities,196 district health offices,and 29 zonal health departments)selected from developing and emerging regions in Ethiopia.Procedures included baseline quality assessment of immunization programme and services using structured checklists;immunization systems strengthening using onsite technical support,training,and supportive supervision interventions in a Plan-Do-Check-Act cycle over 12 months;and collection and analysis of data at baseline and at the 6th and 12th month of interventions using statistical process control and the t-test.Outcome measures were the coverage of the vaccines pentavalent 3,measles,Bacillus Calmette-Guérin vaccine(BCG),Pneumococcal Conjugate Vaccine(PCV),as well as full vaccination status;while process measures were changes in human resources,planning,service delivery,logistics and supply,documentation,coordination and collaboration,and monitoring and evaluation.Analysis and interpretation of data adhered to SQUIRE 2.0 guidelines.Results:Prior to the interventions,vaccination coverage was low and all seven process indicators had an aggregate score of below 50%,with significant differences in performance at healthcare facility level between developing and emerging regions(P=0.0001).Following the interventions,vaccination coverage improved significantly from 63.6%at baseline to 79.3%for pentavalent(P=0.0001),62.5 to 72.8%for measles(P=0.009),62.4 to 73.5%for BCG(P=0.0001),65.3 to 81.0%for PCV(P=0.02),and insignificantly from 56.2 to 74.2%for full vaccination.All seven process indicators scored above 75%in all regions,with no significant differences found in performance between developing and emerging regions.Conclusions:The CQI interventions improved immunization capacity and vaccination coverage in Ethiopia,where the unstable transmission patterns and intensity of infectious diseases necessitate for a state of readiness of the health system at all times.The approach was found to empower zone,district,and facility-level health sectors to exercise accountability and share ownership of immunization outcomes.While universal approaches can improve routine immunization,local innovative interventions that target local problems and dynamics are also necessary to achieve optimal coverage. | Tsegahun Manyazewal Alemayehu Mekonnen Tesfa Demelew Semegnew Mengestu Yusuf Abdu Dereje Mammo Workeabeba Abebe Belay Haffa Daniel Zenebe Bogale Worku Amir Aman Setegn Tigabu | 2018 | Infectious Diseases of Poverty2018，7，1： | 1 |
| 15 | Diagnosis of ischeralc heart disease using CK-MB, troponin-I and ischemia modified albumin显示文摘 | Dawie J Chawla R Worku Y | 2011 | Ethiop Med J2011，49，1： | 1 |
| 16 | Fifteen-year experience and outcomes of pericardi ectomy for constrictive pericarditis显示文摘 | AVGERINOS D RABITNOKOV Y WORKU B | 2014 | J Card Snrg2014，29，4： | 1 |
| 17 | Diagnosis of ischemic heart disease using CK-MB,troponin-I and ischemia modified albumin显示文摘 | Dawie J Chawla R Worku Y | 2011 | Ethiop Med J2011，49，1： | 1 |
| 18 | Themechanism of adenosine production in rat polymorpho nuclear leueoctytes显示文摘 | Newby A C | 1983 | Biochem J1983，214，： | 1 |
| 19 | Results of five randomized studies on the immunomodulatory activity of preparations of Echinacea 显示文摘 | Melchart D Linde K Worku F et a/ | 1995 | Journal of Alternative and Complementary Medicine1995，1，2： | 1 |
| 20 | Differential effects of control and antigen-specific T cells on intracellular mycobacterial growth 显示文摘 | Worku S Hoft DF | 2003 | Infect Immun2003，71，4： | 1 |
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