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A Review of Adopter’s Common Misconfigurations of Virtual Machines: The Case of Tanzania 对采用者常见的虚拟机配置错误的回顾:以坦桑尼亚为例
Pub Date : 2018-09-30 DOI: 10.4314/HURIA.V25I2
S. Ally, N. Jiwaji, C. Tarimo
Adoption and use of hypervisors and virtual machines have become heart of virtual server computing and are currently a primary choice to store and share data across different public and private sectors. However, one of the major security threats is on meager adopter’s knowledge on proper handling of hypervisor installation, VMs creation and configurations. This paper exposes distinct security vulnerabilities of virtualized systems that are caused by the adopters due to various system misconfigurations such as use of unified installer across virtual infrastructure, level of security enhancement in type 2 hypervisors, presence of untouched default settings in open source hypervisors, usage of vendor lock in VMs file formats, ad hoc creation of VMs and allocation of computing resources especially virtual CPU, RAM and HDD. Furthermore, undecided size of key Linux directories including /home directory, /boot directory, /var directory, root (/) directory, /temp directory and swap have also been assessed. To undertake this study, server configurations in 15 public and 9 private organizations were screened. A total of 31 purposively selected server administrators were interviewed guided by a checklist of questions in a semi-structured questionnaire. A quick observation obtained from the findings of this study suggests that server virtualization adopters operate at high security risks due to existence of uncoordinated and unsecured VMs configuration due to lack of required expertise. Lack of regular system auditing and monitoring turn the adopters into vulnerable and target of attack at any time without the adopter’s knowledge. The need for adopters to observe best practices towards adoption and use of virtualization software is vital.
管理程序和虚拟机的采用和使用已经成为虚拟服务器计算的核心,并且目前是跨不同公共和私有部门存储和共享数据的主要选择。然而,主要的安全威胁之一是采用者缺乏正确处理虚拟机管理程序安装、虚拟机创建和配置的知识。本文揭示了虚拟化系统的不同安全漏洞,这些漏洞是由采集者由于各种系统配置错误而造成的,例如跨虚拟基础设施使用统一的安装程序,类型2管理程序中的安全增强级别,开源管理程序中未受影响的默认设置,使用虚拟机文件格式中的供应商锁定,临时创建虚拟机和分配计算资源,特别是虚拟CPU, RAM和HDD。此外,还评估了未确定大小的关键Linux目录,包括/home目录、/boot目录、/var目录、根(/)目录、/temp目录和swap。为了进行这项研究,我们对15个公共机构和9个私人机构的服务器配置进行了筛选。在半结构化问卷中的问题清单的指导下,总共采访了31名有目的选择的服务器管理员。从这项研究的发现中获得的一个快速观察表明,服务器虚拟化采用者由于缺乏必要的专业知识而存在不协调和不安全的vm配置,因此操作的安全性风险很高。缺乏定期的系统审计和监视会使采用者在不知情的情况下随时成为易受攻击的目标。采用者必须遵守采用和使用虚拟化软件的最佳实践,这一点至关重要。
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引用次数: 3
Effectiveness of Mobile Learning as a means of Distance Learning in Tanzania 坦桑尼亚移动学习作为远程学习手段的有效性
Pub Date : 2018-03-30 DOI: 10.4314/huria.v25i1
J. Mshana
The aim of this research was to explore the effectiveness of Mobile learning (M-Learning) as a means of Distance Learning (DL). A sample of 120 students were interviewed by using both questionnaire and face- to-face interview. Spreadsheet was used as an instrument to analyse the findings. Results of this study indicate that, distance learning need broadband communication connections, which clearly is more suitable to support online learning. Since Mobile devices have a network connection (3G/4G) available almost (99.999%) of the time in almost every part of developed countries; learners can enjoy the biggest advantage of M-Learning technology- when used; that it can be used anywhere, anytime and its usage is easy access to a larger number of distance learners. It is therefore concluded that effectiveness of M-Learning can be used as a means of DL and once used facilitate the entire distance education by enhancing communication among distance learners and lecturers and ways of delivering lectures.
本研究的目的是探讨移动学习(M-Learning)作为远程学习(DL)手段的有效性。采用问卷调查和面对面访谈相结合的方法对120名大学生进行了访谈。电子表格被用作分析研究结果的工具。本研究结果表明,远程学习需要宽带通信连接,这显然更适合支持在线学习。由于移动设备几乎(99.999%)在发达国家的每个地方都有网络连接(3G/4G);学习者可以享受移动学习技术的最大优势——当使用时;它可以随时随地使用,而且它的使用对大量的远程学习者来说很容易。因此得出结论,移动学习的有效性可以作为DL的一种手段,一旦使用,通过加强远程学习者和讲师之间的沟通以及授课方式,促进整个远程教育。
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引用次数: 6
Seroepidemiologic Survey for Human Sparganosis in Mto wa Mbu Division, Monduli District, Tanzania 坦桑尼亚蒙杜利地区Mto wa Mbu地区人间斯巴达病血清流行病学调查
Pub Date : 2015-06-20 DOI: 10.4314/HURIA.V20I1
N. Kavana, CJ Kavana, AA Kassuku
Sparganum is a plerocercoid of pseudophyllidean tapeworm of Spirometra species. Human sparganosis has been reported in Northern Tanzania. A seroepidemiologic survey was undertaken to detect anti-sparganum specific IgG antibodies in serum of normal inhabitants of Mto wa Mbu, Monduli District, Tanzania. Sera were tested by enzyme-linked immunosorbent assay (ELISA) for the antisparganum antibodies. Positive rate for antisparganum antibody in 185 subjects was 116 (62.7%). Out of these 17 (9.2) were adult males, 80 (43.2%) were adult females and 19 (10.3%) were children (<18 years). Data for the questionnaire for all 116 ELISA positive inhabitants revealed that had history of eating game meat and drinking water from running springs. The data revealed that ELISA would be useful to find infected cases among normal inhabitants at sparganosis endemic areas. Key words: Sparganosis, seroepidemiology, ELISA
Sparganum是一种螺旋体绦虫的假茶树绦虫。坦桑尼亚北部报告了人类斯巴达病。对坦桑尼亚蒙杜利区Mto wa Mbu的正常居民进行了血清流行病学调查,以检测血清中抗sparganum特异性IgG抗体。采用酶联免疫吸附试验(ELISA)检测血清中抗sparganum抗体。185例患者抗斯巴甘抗体阳性率116例(62.7%)。其中成年男性17例(9.2),成年女性80例(43.2%),儿童(<18岁)19例(10.3%)。所有116名ELISA阳性居民的问卷数据显示,他们有吃野味和饮用流动泉水的历史。结果表明,酶联免疫吸附试验可在斯巴达病流行地区的正常居民中发现感染病例。关键词:斯巴达菌病;血清流行病学;ELISA
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引用次数: 4
Marker-assisted Screening of Cotton Cultivars for Bacterial Blight Resistance Gene 棉花抗白叶枯病基因的标记辅助筛选
Pub Date : 2015-02-19 DOI: 10.4314/HURIA.V19I1
Christopher Faustine, L. Hoffmann, E. Lukonge, F. Tibazarwa
Bacterial blight or leaf blight is a common disease of cotton in almost all cotton growing countries, including Tanzania. Bacterial blight is caused by infection of plants with the bacteria ( Xanthomonas axonopodis pv. malvacearum ) and the use of resistant cultivars is the most effective long-term strategy to manage the disease. The strategy starts with identification of resistant individuals, which can be identified either phenotypically by inoculation or by use of molecular markers linked to genes that confer resistance. The B12 gene is known to confer a high level of resistance to all Xanthomonas axonopodis pv. malvacearum races found in USA and Africa. Four Brazilian and three local cultivars were screened for the presence of SSR (CIR246) and SNP NG0207155 markers linked to B12. The SNP marker showed the greatest frequency of resistance-linked alleles in the cultivar UK08 (85.71%) followed by UK91 (75%),UKM08 and Ipe (25%), Araca(8.33%),Aroeira (7.1%) and the least in Cedro (0%). Comparable results were recorded for SSR marker where the cultivar UK08 presented relatively higher frequency of resistance alleles (85.71%) of samples tested followed by UK91 (68.75%), UKM08 (25%), Ipe, Aroeira and Araca (8%) and the last was Cedro (0%). The results suggest the potential utility of Tanzanian germplasm in breeding for resistance to Xanthomonas axonopodis pv. malvacearum race 18 and the need to purify the same germplasm by marker assisted selection. Key words: Bacterial Blight, Cotton, Resistant cultivars, Tanzania.
细菌性枯萎病或叶枯病是一种常见的棉花疾病,在几乎所有的棉花种植国,包括坦桑尼亚。细菌性枯萎病是由植物感染黄单胞菌(Xanthomonas axonopodis pv)引起的。和使用抗病品种是控制该疾病最有效的长期策略。该策略从鉴定耐药个体开始,可通过接种或使用与赋予耐药基因相关的分子标记进行表型鉴定。已知B12基因赋予对所有轴索黄单胞菌pv的高水平抗性。在美国和非洲发现的malvacearum种族。对4个巴西品种和3个地方品种进行了与B12相关的SSR (CIR246)和SNP NG0207155标记的筛选。SNP标记显示,抗性连锁等位基因频率最高的品种为UK08(85.71%),其次为UK91(75%)、UKM08和Ipe(25%)、Araca(8.33%)、Aroeira(7.1%),最低的品种为Cedro(0%)。SSR标记中,UK08抗性等位基因出现频率较高(85.71%),其次为UK91(68.75%)、UKM08(25%)、Ipe、Aroeira和Araca(8%),最后为Cedro(0%)。结果表明坦桑尼亚种质资源在抗轴索黄单胞菌育种中具有潜在的应用价值。锦葵18小种及利用标记辅助选择纯化同一种质的必要性。关键词:白叶枯病,棉花,抗性品种,坦桑尼亚
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引用次数: 2
Animal Waste Management Practices and Perceptions on Public and Environmental Health Risks 动物废物管理做法及对公众和环境健康风险的认识
Pub Date : 2012-10-12 DOI: 10.4314/HURIA.V12I1
L. Kusiluka, P. Gallet, An Mtawa
A study was conducted to assess the practices with respect to management of animal wastes and awareness of livestock keepers on the environmental and public health risks associated with improper management of animal wastes in 66 livestock-keeping households in Morogoro Municipality, Tanzania. A semi-structured questionnaire was used for data collection, complemented with review of secondary data and researchers’  observations. Majority of respondents (91.0%) heaped the wastes near the animal shed and none of them treated the waste before disposal. Main methods for waste disposal were spreading as manure on crop farms (62.1%) and burning (10.6%), and about 24% respondents disposed the wastes on any available open space. It was also observed that 40.9% of the respondents were aware of environmental risks caused by improper disposal of animal wastes while 59.1% were not aware of such risks, and the risk mentioned was air pollution. About 57.6% of the respondents were aware of the public health risks and they mentioned skin infections, helminthosis, diarrhea, allergy and respiratory infections. Majority of the respondents (87.9%) were not aware of the existence of legislation governing animal waste management. It can be concluded from the study that the limited knowledge on proper management of animal wastes in the study area as well as lack of enforcement of legislation predisposes the environment and public to health risks. It is recommended that responsible authorities should initiate programmes to educate livestock keepers and the general public on appropriate waste management technologies in order to minimize public and environmental health risks. Key words : animal wastes, environment, public health
进行了一项研究,以评估坦桑尼亚莫罗戈罗市66个牲畜饲养户在动物废物管理方面的做法以及牲畜饲养者对与动物废物管理不当有关的环境和公共卫生风险的认识。采用半结构化问卷进行数据收集,并对二手数据和研究人员的观察结果进行回顾。大多数回答者(91.0%)将废弃物堆放在畜舍附近,且在处置前均未进行处理。主要的废物处理方法是在农作物农场作为粪肥撒(62.1%)和焚烧(10.6%),约24%的受访者将废物处理在任何可用的空地上。调查还发现,40.9%的受访者意识到动物粪便处置不当带来的环境风险,59.1%的受访者不知道这种风险,提到的风险是空气污染。约57.6%的受访者了解公共卫生风险,他们提到皮肤感染、寄生虫病、腹泻、过敏和呼吸道感染。大多数受访者(87.9%)不知道有关动物废物管理的法例。从研究中可以得出的结论是,由于对研究地区动物废物适当管理的知识有限,以及缺乏执法,使环境和公众容易受到健康风险。建议主管当局应启动方案,教育牲畜饲养者和一般公众了解适当的废物管理技术,以便尽量减少对公众和环境健康的风险。关键词:动物粪便;环境;公共卫生
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引用次数: 2
The Challenges Facing Distance Students in Undertaking Geography Field Practical Projects: The Case of the Open University of Tanzania Students 远程学生地理野外实践项目面临的挑战——以坦桑尼亚开放大学学生为例
Pub Date : 2012-08-13 DOI: 10.4314/HURIA.V13I2
L. Mbati
This paper discusses the challenges facing distance students in Geography field Practical projects (GFPs) at The Open University of Tanzania (OUT). A random sample size of 19 students who participated in GFP1 in 2009 and 2010 were selected from randomly sampled regional centres of Singida, Dodoma, Njombe, and Morogoro centres of OUT. The respondents were interviewed using questionnaires on their experience in GFP. They also formed a focused discussion group (FDG) for this study. Both content analysis and descriptive analysis were used. Findings showed a downward trend of students’ attendance to fieldwork as compared to the early years when GFPs was introduced. The study sample revealed that, in 2006 the four selected regional centres recorded 375 (76.5%) students attended fieldwork out of 490 (100%) students who registered for GFP. In year 2010, only 132 (53.9%) attended out of 245 students who registered for GFP. Besides, 63.2% of the respondents in the study sample said they were supervised in GFP1 under limited time of 2-3 days as supervisors had to leave fieldwork due to time constraint. The paper recommends the urgent need to improve GFP organization, especially adherence to 21 days allocated for GFP and financial support in order to achieve its established objectives and goals at large. Key words : The Open University of Tanzania, Geography field Practical projects, challenges, distance education
本文讨论了坦桑尼亚开放大学(OUT)远程学生在地理实地实践项目(gfp)中面临的挑战。从外省辛吉达、多多马、恩琼贝和莫罗戈罗中心的随机抽样区域中心抽取2009年和2010年参加GFP1的19名学生作为随机样本。受访者使用问卷对他们在绿色生产力方面的经验进行了访谈。他们还为这项研究成立了一个重点讨论小组(FDG)。采用了内容分析和描述性分析。调查结果显示,与引入gfp的早期相比,学生参加实地考察的人数呈下降趋势。研究样本显示,2006年,四个选定的区域中心记录了490名(100%)注册GFP的学生中有375名(76.5%)学生参加了实地考察。2010年,在245名注册GFP的学生中,只有132人(53.9%)参加了该课程。此外,研究样本中63.2%的受访者表示,他们在GFP1的监督时间有限,只有2-3天,因为主管由于时间限制不得不离开实地工作。该论文建议迫切需要改进GFP组织,特别是遵守为GFP分配的21天时间和财政支持,以实现其既定的目标和总体目标。关键词:坦桑尼亚开放大学,地理野外实践项目,挑战,远程教育
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引用次数: 11
Treatment of Older People in Tanzania: A Brief Look at the Law and Practice 坦桑尼亚老年人待遇:法律与实践简览
Pub Date : 2005-05-20 DOI: 10.4314/HURIA.V5I1.33990
A.O.J. Kaniki
No Abstract Available Huria: Journal of the Open University of Tanzania Vol.5 2003: 82-88
无摘要可用:《坦桑尼亚开放大学学报》Vol.5 2003: 82-88
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引用次数: 0
Library Automation: The Role and Significance of Library Automation Plans 图书馆自动化:图书馆自动化计划的作用和意义
Pub Date : 2005-05-20 DOI: 10.4314/HURIA.V5I1.33993
A. Nkhoma-Wamunza
No Abstract Available Huria: Journal of the Open University of Tanzania Vol.5 2003: 120-133
无摘要可用:《坦桑尼亚开放大学学报》Vol.5 2003: 120-133
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引用次数: 5
The Influence of Motivation on Secondary School Students' Performance in English Language 动机对中学生英语学习成绩的影响
Pub Date : 2005-05-20 DOI: 10.4314/HURIA.V5I1.33991
G. J. Nyamubi
No Abstract Available Huria: Journal of the Open University of Tanzania Vol.5 2003: 89-110
《坦桑尼亚开放大学学报》Vol.5 2003: 89-110
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引用次数: 2
Teacher Factors that Lead to Pupil Motivation not to Learn in Tanzania Primary Schools 坦桑尼亚小学教师因素导致学生不愿学习的动机
Pub Date : 2005-05-20 DOI: 10.4314/HURIA.V5I1.33986
V. Lema
No Abstract Available Huria: Journal of the Open University of Tanzania Vol.5 2003:36-50
无摘要可用:《坦桑尼亚开放大学学报》Vol.5 2003:36-50
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引用次数: 1
期刊
Huria: Journal of the Open University of Tanzania
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