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Correlation between the academic performance of students in continuous assessment and the National Examinations Council in English language in Jos-South, Nigeria 尼日利亚乔斯南地区学生在连续评估中的学习成绩与国家英语考试委员会的相关性
Pub Date : 2020-06-29 DOI: 10.4038/ijms.v7i1.124
Adekunle Thomas Olutola, F. Nini
This study investigated the correlate between academic performances of students in continuous assessment and National Examinations Council English language in Jos-South, Local Government Area of Plateau State, Nigeria. The researchers used correlational research design in the study. Five hundred and six (506) students who sat for English language National Examinations Council (NECO) examination in 2016/2017 academic session in Jos-South of Plateau State public and private schools were selected as study sample through the use of simple random sampling technique. The sample consisted of 291 males and 215 females. Frequency, percentage, t-test and Pearson product correlation analysis were used to analyze the data collected for the study. The results of the study revealed no significant relationship between academic performance of students’ in Continuous Assessment (CA) English language and NECO English language. Also, no significant difference was found between male and female students’ academic performance in CA and NECO English language examination while significant difference existed between private and public school students’ performance in CA and NECO English language examination. It was recommended that school administrators should monitor the conduct of English language CA by their teachers in order to improve students’ performance in NECO English language examinations.
本研究调查了尼日利亚高原州Jos-South地方政府地区学生在持续评估中的学习成绩与国家考试委员会英语水平之间的相关性。研究人员在研究中采用了相关研究设计。通过使用简单随机抽样技术,选择2016/2017学年高原州Jos-South公立和私立学校参加英语国家考试委员会(NECO)考试的560(506)名学生作为研究样本。样本包括291名男性和215名女性。采用频率、百分比、t检验和Pearson产品相关分析对研究收集的数据进行分析。研究结果显示,学生在持续评估(CA)英语和NECO英语的学习成绩之间没有显著的关系。此外,男女学生在CA和NECO英语语言考试中的成绩无显著差异,而私立学校和公立学校学生在CA和NECO英语语言考试中的成绩存在显著差异。建议学校行政人员应监察教师的英语语文评核行为,以提高学生在NECO英语语文考试中的表现。
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引用次数: 0
Non-anthropocentric view towards animal welfare: a moral philosophical analysis 非人类中心主义动物福利观:道德哲学分析
Pub Date : 2020-06-29 DOI: 10.4038/ijms.v7i1.122
R. N. Fernando
Animal welfare has been debated around the world, as humans continue to focus on satisfying their limitless needs and desires. They use nature as a means of survival and need satisfaction. Animals are part of nature and many environmentalists struggle for survival and the right to life of animals. The human world is focused solely on industrial development, human livelihoods and the instrumental value of nature. When discussing the nature and well-being of animals, it is necessary to take into account a moral consideration based on the intrinsic value of nature. This includes surviving animals for their own good, which is, protecting animals for their own betterment. Social wellbeing is defined as a better life. This research focuses primarily on how to provide a better life for animals while giving them a moral concern via the non-anthropological vision as explained by environmental ethics. Environmental ethics embraces knowledge by providing insight into thinking morally about nonhuman beings. The qualitative methodology was adopted for the research contains the philosophical and moral analysis. As a result, this implies analytical and comparative approaches to environmental ethics. Secondary data were collected as part of several articles, research and books on environmental ethics. Non- anthropocentric is a successful measure of reducing the gap between humans and animals. It is useful and useful in implementing legislation and policies that positively support the welfare of animals and the protection of all nonhuman beings. The world needs a moral philosophical consideration to protect animals and the welfare of animals .
随着人类继续专注于满足自己无限的需求和欲望,动物福利在世界各地一直备受争议。他们把自然作为一种生存和需求满足的手段。动物是大自然的一部分,许多环保主义者为动物的生存和生命权而斗争。人类世界只关注工业发展、人类生计和自然的工具价值。在讨论动物的自然和福利时,有必要考虑到基于自然内在价值的道德考虑。这包括为了动物自身的利益而生存,也就是为了动物自身的利益而保护动物。社会福利被定义为更好的生活。这项研究主要集中在如何为动物提供更好的生活,同时通过环境伦理学解释的非人类学视角给予它们道德关注。环境伦理学通过提供对非人类进行道德思考的洞察力来包含知识。本研究采用定性方法,包含哲学分析和道德分析。因此,这意味着对环境伦理的分析和比较方法。次要数据是作为几篇关于环境伦理的文章、研究和书籍的一部分收集的。非人类中心主义是缩小人类与动物之间差距的一项成功措施。它在实施积极支持动物福利和保护所有非人类的立法和政策方面是有用的。世界需要一个道德哲学的考虑来保护动物和动物的福利。
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引用次数: 0
Socio-cultural factors that determine the success and failure of a development project. (With special reference to Samanala Wewa development project in Sri Lanka) 决定一个发展项目成败的社会文化因素。(特别提到斯里兰卡的Samanala Wewa开发项目)
Pub Date : 2020-06-29 DOI: 10.4038/ijms.v7i1.119
S. Samarasekara
Development can be defined as a specified state of growth or advancement; a new and advanced product or idea; an event constituting a new stage in a changing situation. In its involvement in enhancing living conditions in the poor, developing countries might well be very different from those in the rich countries since development covers areas like social, cultural, spiritual and economic. The Samanala Wewa development project was commissioned in 1992. It has become the key factor for many socio-cultural changes in the area. The Samanala Wewa dam is located in the Uda Walawe basin, near Balangoda. The main objective of this study was confined to finding out the appropriateness of the Samanala Wewa project in paving the way for a development that would open new opportunities for the people of the area. Data for the study were collected through an interview schedule from fifty households out of 153 in three villages located near the Samanala Wewa reservoir. According to the results of this research, 86% of those who answered as “satisfied” with the project gave the reason for it as “improvement in infrastructure and access to society” brought about by the relocation to suburban areas, while 14% of those who answered “unsatisfied” raised as reasons “loss of self-sufficient economy and rural life,” showing that reaction to the change in environment caused by the relocation from rural to suburban areas varies by the resident. It is presumed that dissatisfaction or “loss of self-sufficient economy and rural life” is caused by financial difficulties such as difficulty in finding jobs and low cash income. Accordingly, this project can be identified as one which is not merely unsuccessful. However, it should be carried out with some social development projects to uplift the quality of life of the people concerned.
发展可以定义为一种特定的成长或进步状态;新产品:新的和先进的产品或想法;在变化的形势中构成新阶段的事件。在参与改善穷人的生活条件方面,发展中国家很可能与富裕国家大不相同,因为发展包括社会、文化、精神和经济等领域。萨马纳拉维瓦开发项目于1992年投入使用。它已成为该地区许多社会文化变化的关键因素。Samanala Wewa大坝位于乌达瓦拉维盆地,靠近巴兰戈达。这项研究的主要目的是查明Samanala Wewa项目是否适合为该地区人民开辟新机会的发展铺平道路。该研究的数据是通过访谈计划从Samanala Wewa水库附近三个村庄的153个家庭中的50个家庭中收集的。本次调查结果显示,86%的受访者表示满意,原因是城郊迁移带来的“基础设施和社会接触的改善”,而14%的受访者表示不满意,原因是“自给自足的经济和农村生活的丧失”,这表明居民对从农村迁移到城郊所带来的环境变化的反应是不同的。据推测,不满或“失去自给自足的经济和农村生活”是由经济困难引起的,如找工作困难和现金收入低。因此,这个项目不仅是不成功的。但是,它应该与一些社会发展项目一起进行,以提高有关人民的生活质量。
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引用次数: 0
Community and institutional led multi-disciplinary approaches in implementation of integrated watershed management in India: a case study from Karnataka State 社区和机构主导的多学科方法在印度实施综合流域管理:卡纳塔克邦案例研究
Pub Date : 2020-01-15 DOI: 10.31357/IJMS.V7I1.4818
K. Prabhakar
Since independence, reforms towards Panchayat Raj Institutions (PRIs) have focused on designing of legal and administrative structures that institutionalize decentralized governance and planning, while guaranteeing that such a system does not allow the local elite to dominate the marginalized units of the people. With the advent of the 73rd amendment in Indian constitution, the panchayat system is looked as a significant development in handling rural governance in India. In this aspect, the state of Karnataka can be considered in many ways as one of the active states in promoting decentralization. Karnataka is in the forefront when it comes to devolution of functions and financial powers to PRIs. Hence, the current study has the broad objective to undertake a situational and adopting SWOT analysis to determine the strengths, weaknesses, opportunities, and threats (SWOT) related to existing Watershed committees and Water User Co-operative Societies in Karnataka under Integrated Watershed Management Programme (IWMP) in terms of the structure, function and factors influencing in implementation of Watershed programme in the state of Karnataka, India. The findings revealed that about 90 % percent of all committees are found to exist on record (structural level), SWOT analysis clearly shown that community-led water use associations are performing better than the department led water user associations in the implementation of IWMP. While the structure and legal status of PRIs have matured over the years, it is clearly recognized that true public involvement in progress and governance through PRIs has a long way to go.KEYWORDS: Decentralisation, Participatory Development, Local Governance, Integrated Watershed Management Programme
自独立以来,对Panchayat Raj Institutions (PRIs)的改革侧重于设计法律和行政结构,使分散的治理和规划制度化,同时保证这种制度不允许地方精英统治边缘化的人民。随着印度宪法第73条修正案的出台,村务委员会制度被视为处理印度农村治理的重大发展。在这方面,卡纳塔克邦在很多方面都可以被认为是推动分权的积极邦之一。卡纳塔克邦在向pri下放职能和财政权力方面走在了前列。因此,目前的研究有一个广泛的目标,即在印度卡纳塔克邦实施流域计划的结构、功能和影响因素方面,采用情景分析和SWOT分析来确定与卡纳塔克邦综合流域管理计划(IWMP)下卡纳塔克邦现有流域委员会和用水户合作社相关的优势、劣势、机会和威胁(SWOT)。调查结果显示,大约90%的委员会被发现存在记录(结构层面),SWOT分析清楚地表明,社区领导的用水协会在实施IWMP方面比部门领导的用水协会表现更好。虽然pri的结构和法律地位多年来已经成熟,但显然认识到,公众通过pri真正参与进展和治理还有很长的路要走。关键词:权力下放,参与式发展,地方治理,流域综合管理方案
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引用次数: 0
Salinity tolerance of wild Poecilia reticulata (guppy) under laboratory conditions 实验室条件下野生孔雀鱼的耐盐性
Pub Date : 2019-11-30 DOI: 10.31357/IJMS.V6I2.4338
P. Pethiyagoda, S. Alwis, B. Silva
The present study was carried out to investigate the salinity tolerance of Poecilia reticulata (guppy) occurring in Sri Jayewardenepura canal system, in order to assess its suitability to control brackishwater breeding mosquito species such as Aedes sp. Guppies were exposed to different salinity levels directly and gradually under laboratory conditions in glass tanks. To test the direct effect of salinity, 9 different salinities (ranging from 0ppt as a control to35ppt) prepared in three replicates, each stocked with 10 fish were kept for a period of 12 weeks. To test the effect of gradual increase of salinity, three tanks containing freshwater were stocked with 10 fish in each and a gradual increase of salinity (by 5ppt once in 2 weeks up to 38ppt) was done. Mortality rates, growth (total length) and the breeding of fish were recorded in both experiments at regular time intervals. When the fish were exposed to different salinities directly, fish started dying at 10 ppt (10% mortality) after the fourth day of exposure and this mortality rate was observed in 10-20ppt salinity ranges within the 12 weeks (0% mortality was recorded in control tank).  50% survival was shown at 28ppt salinity level at the end of the 12 th week. Beyond 28ppt, there was 100% mortality. Fish showed an average of 5-7 mm growth in salinity levels up to 28ppt but they were not significantly different (p=0.886). Breeding was seen in salinity levels up to 20ppt producing 7-15 fry/female and the fry also could tolerate the salinity levels they were bred into with a mortality level of 20-30% within the study period. Contrast to the above results, the fish when exposed to gradual increasing of salinity levels could survive up to 38ppt with only a 20% mortality rate. They showed a length increase between 1-5mm, in all salinity levels but they were not significantly different (p=0.330). In gradually increasing salinity levels, fish were seen breeding even at 35 ppt (7-10 fry/female) with 10-20 % mortality rate. The results show that the guppy can tolerate and survive in salinity levels up to 28ppt when they are directly introduced from the wild and they can tolerate up to a level of 38ppt salinity if the salinity levels increase gradually. They can grow under saline conditions and breed successfully and the fry can survive well in the saline environment. This makes wild caught P. reticulata (guppy) a potential candidate that can be used as a bio-control agent in the control of species such as Aedes sp-mosquito that breed in brackish water environments of Sri Lanka. KEYWORDS: Gappy,Salinity,Aedes sp ,Bio-control
研究了Sri Jayewardenepura运河系统中孔雀鱼(Poecilia reticulata, guppy)的耐盐性,以评估其对伊蚊(Aedes sp.)等咸淡水孳生蚊子的控制能力。孔雀鱼在实验室条件下直接和逐步暴露于不同盐度的玻璃罐中。为了检验盐度的直接影响,在3个重复中配制9种不同盐度(0 ~ 35ppt为对照),每个重复放养10尾鱼,放养12周。为了测试盐度逐渐增加的效果,我们在三个装有淡水的鱼缸里放了10条鱼,并逐渐增加盐度(每两周增加一次,每次增加5ppt,直到38ppt)。在两个实验中,每隔一定的时间间隔记录鱼的死亡率、生长(总长度)和繁殖情况。当鱼直接暴露于不同的盐度时,鱼在暴露的第四天开始以10 ppt(10%死亡率)死亡,并且在12周内在10-20ppt的盐度范围内观察到这种死亡率(在对照池中记录了0%死亡率)。第12周结束时,28ppt盐度下存活率为50%。超过28ppt,死亡率为100%。盐度为28ppt时,鱼类平均生长5 ~ 7mm,但差异不显著(p=0.886)。在高达20ppt的盐度水平下繁殖,每只雌鱼能产生7-15条鱼苗,而且在研究期间,鱼苗也能忍受它们被培育到的盐度水平,死亡率为20-30%。与上述结果相反,当暴露于逐渐增加的盐度水平时,鱼可以存活高达38ppt,死亡率仅为20%。在所有盐度水平下,它们的长度都在1 ~ 5mm之间增加,但差异不显著(p=0.330)。在逐渐增加的盐度水平下,即使在35 ppt(7-10尾/雌)的条件下也能繁殖,死亡率为10- 20%。结果表明,直接从野外引进的孔雀鱼能在高达28ppt的盐度环境中耐受和生存,盐度水平逐渐升高的孔雀鱼可耐受高达38ppt的盐度。它们能在盐渍条件下生长繁殖成功,鱼苗在盐渍环境下也能很好地存活。这使得野生捕获的网状孔雀鱼(孔雀鱼)成为一种潜在的候选生物防治剂,可用于控制在斯里兰卡咸淡水环境中繁殖的伊蚊等物种。关键词:Gappy,盐度,伊蚊,生物防治
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引用次数: 1
Toxicity evaluation and volatile component analysis of tropical marine sponge Clathria sp. (Schmidt, 1862) 热带海绵Clathria sp.毒性评价及挥发性成分分析(Schmidt, 1862)
Pub Date : 2019-11-30 DOI: 10.31357/IJMS.V6I2.4432.G3525
R. L. Weerasinghe, R. Ranatunga, S. Chinthaka, M. Marasinghe
Marine sponge Clathria sp. holds a significant position in marine natural product research due to its wide range of secondary metabolites. Extensive distribution of genus Clathria in the world causes variances in chemical profile in relation to their environment. The purpose of this study was to evaluate toxicity and profile secondary metabolites of sponge Clathria sp. collected from coastal waters off Mannar, Sri Lanka. Methanolic crude extract of the sponge was subjected to preliminary phytochemical screening and GC-MS analysis. Alkaloids, steroids, terpenoids, and saponins were subjected to phytochemical screening. Seven steroidal derivatives; Cholesta-3,5-diene, stigmastan-3,5-diene, cholesta-7,14-diene, (5. alpha.), ergosta-4,6,22-triene, cholesta-2,4-diene and cholest-2-ene were identified through GC-MS analysis. Brine shrimp lethality assay was carried out to test the toxicity of the extract. LC50 value estimated at 624 ppm. Results of the present study suggest that ethanolic extract of marine sponge Clathria sp. contains steroidal derivatives and certain toxicity, which will be important in future studies to understand the antifouling property of Clathria sp. KEYWORDS : Clathria sp., phytochemical, GC-MS, secondary metabolites, cytotoxicity
海海绵Clathria sp.因其广泛的次生代谢物在海洋天然产物研究中占有重要地位。克拉瑞亚属植物在世界上的广泛分布使其化学特征与其环境有关。本研究的目的是评估从斯里兰卡马纳尔沿海水域收集的海绵Clathria sp.的毒性和次级代谢物。对海绵甲醇粗提物进行初步的植物化学筛选和GC-MS分析。生物碱、类固醇、萜类和皂苷进行了植物化学筛选。七种甾体衍生物;cholesta- 3,5-二烯,stigmastan-3,5-二烯,cholesta-7,14-二烯,(5)。通过气相色谱-质谱分析鉴定出α 1)、麦角-4,6,22-三烯、胆-2,4-二烯和胆-2-烯。采用盐水对虾致死性试验对其进行毒性试验。LC50值估计为624 ppm。本研究结果表明,海绵Clathria sp.乙醇提取物中含有甾体衍生物,并具有一定的毒性,这对进一步研究Clathria sp.的防污特性具有重要意义。关键词:Clathria sp.;植物化学;GC-MS
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引用次数: 1
Anthropometric Assessment of Nutritional Status of Children and Adolescents in Henanigala Indigenous Group, Sri Lanka 斯里兰卡Henanigala土著群体儿童和青少年营养状况的人体测量学评估
Pub Date : 2019-11-30 DOI: 10.31357/IJMS.V6I2.4429.G3521
T. Ananda, C. Nahallage
The prevalence of undernourishment, is often higher among indigenous than non-indigenous children in many countries. However, lesser is known about the nutritional status of the Indigenous (the Veddas) children and adolescents in Sri Lanka. The present study was conducted to assess the nutritional status of the Henanigala Vedda children and adolescents through anthropometric measurements. Stature and weight of a total of 169 children and adolescents (90 girls and 79 boys between 5-18 years of age) were measured and calculated the Body Mass Index (BMI). Subjects were categorized into three age groups, 5-8 years ( 𝑛 = 28), 9-11 years ( 𝑛 = 52) and 12–18 years ( 𝑛 = 89). According to the National Health and Nutrition Examination Survey (NHANES) subjects who were falling below the age and sex specific fifth percentile (< 5th %ile) of the BMI Cut off Points were defined as undernourished. SPSS, MS Excel and BMI metric calculator for children, were used for data analysis. In order to test the level of significance, student t-test was performed ( 𝑃 <0.05). Mean BMI of the girls of 5-8, 9-11 and 12-18 age categories were 13.22 ± 1.06, 13.39 ± 1.59 and 18.66 ± 3.42 respectively, boys were 14.78 ± 3.18, 14.76 ± 3.39 and 18.01 ± 3.38 respectively. The difference in stature was significant only between the boys and girls of the 12-18 age group. According to the BMI cut off points 67% of the girls and 60% of the boys of the 5-8 age group and 69% of the girls and 54% of the boys in the 9-11 age groups belonged to underweight category (critical). When compared with other age groups lower prevalence of underweight was found among 12-18 years age group which were 22% of girls and 35% of boys (but still at health risk). Higher prevalence of underweight among children could be due to the lower socioeconomic and educational status of their parents. In addition, sudden cultural transformations due to the resettlement which had an adverse effect on their traditional lifestyle including food practices would account for the lower nutritional status observed among the majority of the indigenous children and adolescents in Henanigala. KEYWORDS : Anthropometrics, BMI, Vedda, Henanigala, Underweight
在许多国家,土著儿童的营养不良发生率往往高于非土著儿童。然而,人们对斯里兰卡土著(吠陀人)儿童和青少年的营养状况知之甚少。本研究旨在通过人体测量来评估海纳尼加拉维达儿童和青少年的营养状况。测量了169名儿童和青少年(90名女孩和79名男孩,年龄在5-18岁之间)的身高和体重,并计算了体重指数(BMI)。研究对象分为5-8岁(𝑛= 28)、9-11岁(𝑛= 52)和12-18岁(𝑛= 89)三个年龄组。根据国家健康和营养检查调查(NHANES),低于年龄和性别特定的BMI截断点的第五百分位数(< 5%)的受试者被定义为营养不良。采用SPSS、MS Excel和儿童BMI指标计算器进行数据分析。为检验显著性水平,采用学生t检验(p <0.05)。5-8岁、9-11岁和12-18岁年龄组女生BMI均值分别为13.22±1.06、13.39±1.59和18.66±3.42,男生BMI均值分别为14.78±3.18、14.76±3.39和18.01±3.38。身高差异仅在12-18岁年龄组的男孩和女孩之间显著。根据BMI分界点,5-8岁年龄组中67%的女孩和60%的男孩,9-11岁年龄组中69%的女孩和54%的男孩属于体重过轻(临界)。与其他年龄组相比,12-18岁年龄组体重不足的发生率较低,女孩为22%,男孩为35%(但仍有健康风险)。儿童体重不足的发生率较高可能是由于其父母的社会经济和教育地位较低。此外,由于重新安置而突然发生的文化转变对他们的传统生活方式,包括饮食习惯产生了不利影响,这是赫纳尼加拉大多数土著儿童和青少年营养状况较低的原因。关键词:人体测量学,BMI, Vedda, Henanigala,体重不足
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引用次数: 1
Reduplication: Its Types and Functions in Sinhala 僧伽罗语中重复的类型和功能
Pub Date : 2019-06-30 DOI: 10.4038/IJMS.V6I1.87
Lalith Ananda, Lalith Ananda M.G
Reduplication can be largely viewed as a subtype of repetition, a pervasive phenomenon of every language affecting all types of linguistic units such as sounds, words, and phrases. It can be also viewed as the systematic repetition of phonological material within a word for semantic or grammatical purposes. The aim of the present paper is to examine reduplication phenomenon in Sinhala1 in the broader spectrum of reduplication patterns and functions evidenced in many languages of the world. Data for the present study consisted of sentences with reduplication types and functions that can be distinguished in Sinhala. A sample of 60 sentences with such reduplication was used. The researcher consulted 05 adult native speakers of Sinhala for their grammaticality judgments about those sentences. The examples and example sentences used in this study are the data used for this purpose. In terms of the main findings of the study, it can be concluded that Sinhala employs reduplication in both of its spoken and written varieties in varying degrees and for various effects. In its written form, reduplication fulfills some stylistic functions and is mostly manifested in poetry, riddles, songs, anecdotes and narrations. The colloquial Sinhala uses reduplication in ordinary discourse and can be seen irrespective of the dialectal varieties. It can be observed at phonological, morphological/morpho-syntactic, and lexical levels. Sinhala manifests reduplication over a broad range of categories such as noun, verb, adjective, and adverb. Nevertheless, Sinhala is quite impoverished when viewed against the broader spectrum of reduplication types, sub-types, functions, and even in the areas of language affected by reduplication as evidenced in many languages of the world. KEYWORDS: reduplication, full, partial
重复在很大程度上可以被看作是重复的一个亚型,是一种普遍存在于每种语言中的现象,影响着所有类型的语言单位,如声音、单词和短语。它也可以被看作是为了语义或语法目的而在一个词内系统地重复语音材料。本文的目的是在世界上许多语言的重复模式和功能的更广泛的范围内研究僧伽罗语的重复现象。本研究的数据包括在僧伽罗语中可以区分的重复类型和功能的句子。我们选取了60个重复的句子作为样本。研究人员询问了05名以僧伽罗语为母语的成年人对这些句子的语法判断。本研究中使用的例句和例句是用于此目的的数据。就研究的主要发现而言,可以得出的结论是,僧伽罗语在其口语和书面语变体中都不同程度地使用了重复,并产生了不同的效果。在其书面形式中,重复完成了一些文体功能,主要表现在诗歌、谜语、歌曲、轶事和叙述中。口语化的僧伽罗语在日常话语中使用重复,并且可以看到与方言变体无关。它可以在音系、形态/形态句法和词汇水平上观察到。僧伽罗语在名词、动词、形容词和副词等广泛的类别中表现出重复。然而,从更广泛的重复类型、子类型、功能,甚至在世界上许多语言受重复影响的语言领域来看,僧伽罗语是相当贫乏的。关键词:重复,完全,部分
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引用次数: 0
Efficient Office Assistant Robot System: Autonomous Navigation and Controlling Based on ROS 高效办公助理机器人系统:基于ROS的自主导航与控制
Pub Date : 2019-06-30 DOI: 10.4038/ijms.v6i1.93
S. A. I. P. Diddeniya, W. Wanniarachchi, P. R. S. D. Silva, N. Ganegoda
This paper proposes a movable robot that can be used to deliver documents or small parcels (>2.0kg) between employees of an unstructured indoor office environment. The study reviews literature on robot navigation, apply promising techniques and test their accuracy in an unstructured indoor laboratory environment. There are many technologies available in robot navigation. We have selected free and open source software and inexpensive sensors and materials to build a low cost but accurate robot. Our system comprised of three units: first one that process sensor data, second one which is the navigating robot having sensors and actuators, and third one controlling part of office assistant robot system. We have used Robotic Operating System (ROS) indigo as the ground operating system in the background of Ubuntu Operating System. The experiment was conducted to examine the capabilities of the setup and studied its behavior, mapping and localization specifically according to the user commands. An unstructured indoor environment was selected with five users located on the sides. We considered both dark (55 lux – 60 lux) and bright (15 lux – 20 lux) illumination conditions in the room. Then, we allowed the robot to navigate autonomously according to the user commands between five users and monitored its accuracy by looking at the completion of the route to a target user. Results show that the robot has about 98.4% of accuracy of achieving the goal location on average in both lighting conditions and 98% and 98.8% of accuracies for bright and dark conditions respectively. Finally, this office assistant robot system could be practically used in an office environment in both bright and dark lighting conditions.
本文提出了一种可移动的机器人,可以在非结构化的室内办公环境中在员工之间传递文件或小包裹(>2.0kg)。本研究回顾了机器人导航的文献,应用了有前途的技术,并在非结构化的室内实验室环境中测试了它们的准确性。在机器人导航中有许多可用的技术。我们选择了免费和开源的软件,廉价的传感器和材料来制造一个低成本但精确的机器人。我们的系统由三个单元组成:第一个单元处理传感器数据,第二个单元是带有传感器和执行器的导航机器人,第三个单元是办公室助理机器人系统的控制部分。我们使用机器人操作系统(ROS) indigo作为Ubuntu操作系统后台的地面操作系统。实验是为了检查设置的功能,并根据用户命令研究其行为,映射和定位。选择了一个非结构化的室内环境,五个用户位于侧面。我们考虑了房间内黑暗(55勒克斯- 60勒克斯)和明亮(15勒克斯- 20勒克斯)的照明条件。然后,我们允许机器人根据五个用户之间的用户命令自主导航,并通过查看到目标用户的路线完成情况来监控其准确性。结果表明,该机器人在光照条件下平均达到目标位置的准确率约为98.4%,在明亮和黑暗条件下平均达到目标位置的准确率分别为98%和98.8%。最后,该办公助理机器人系统可以在明暗照明条件下的办公环境中实际使用。
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引用次数: 1
Investigation of Optimum pH and Temperature for In-Vitro Crystallization of Urinary Cystine 尿胱氨酸体外结晶最佳pH和温度的研究
Pub Date : 2019-06-30 DOI: 10.4038/IJMS.V6I1.89
A. Gunawardana, K. N. L. Amarasingha, A. Priyadarshani
Cystinuria contributes in formation of urinary stones. But, it has been reported that cystinuria is diagnosed when someone experiences with cystine stones. Therefore, early diagnosis of this condition is important. Thus, the objective of the study was to determine the optimum pH and temperature for crystallization of urine cystine in-vitro . Cystinuria solutions were prepared with the concentrations of 40, 60, 70, 75, 80, 90, 100 and 120 mg/dL. The pH of each solution was changed with the addition of acetic acid. Then solutions were exposed to temperature +4°C and 37°C, for 15, 30 and 45min. The sediments were observed microscopically for cystine crystals formation. Then acetone was added to cystinuria with the ratio of cystinuria:acetone, 8:1, 4:1, 2:1 and 1.1 and pH was altered with acetic acid and were subjected to +4 °C and 37 °C, for 15, 30 and 45 minutes and sediment was observed for cystine crystals under the microscope. Cystine crystallization had been occurred in the cystinuria of ≥100 mg/dL at pH 5 at 37 ° C and +4 °C, 30min after the addition of acetic acid whereas with the addition of acetone at cystinuria of ≥75mg/dL at pH 5 in both 37°C and at +4°C, 30min after the addition of acetic acid. The number of cystine crystals per High Power Field (HPF) was highest where cystinuria:acetone was 8:1.  The optimum conditions for cystine crystallization is at pH 5, 37 °C and +4 °C, 30min after acidifying with acetic acid at the minimum concentration of 100 mg/dL  of cystinuria. With the addition of acetone, at the ratio of cystinuria:acetone 8:1 with minimum concentration of cystinuria of 75 mg/dL.  KEYWORDS: Cystine, Crystallization, Acetic acid, Acetone, Temperature, pH
胱氨酸尿症有助于尿路结石的形成。但是,据报道,胱氨酸尿症是当有人经历胱氨酸结石时诊断出来的。因此,这种情况的早期诊断很重要。因此,本研究的目的是确定尿胱氨酸体外结晶的最佳pH值和温度。分别制备浓度为40、60、70、75、80、90、100和120 mg/dL的胱氨酸尿溶液。各溶液的pH值随乙酸的加入而改变。然后将溶液暴露于+4°C和37°C的温度下,分别为15、30和45min。显微镜下观察沉积物中胱氨酸晶体的形成。然后在胱氨酸尿中加入丙酮,比例分别为:丙酮、8:1、4:1、2:1和1.1,并用乙酸改变pH,分别在+4℃和37℃下放置15、30和45分钟,在显微镜下观察胱氨酸结晶沉淀。37°C和+4°C条件下pH值≥100mg /dL的胱氨酸尿在加入醋酸后30min出现了胱氨酸结晶,而在37°C和+4°C条件下pH值≥75mg/dL的胱氨酸尿在加入醋酸后30min出现了丙酮结晶。胱氨酸:丙酮为8:1时,每高倍率场(HPF)的胱氨酸晶体数最高。胱氨酸结晶的最佳条件为pH值为5、37℃和+4℃,以最低浓度为100 mg/dL的胱氨酸乙酸酸化30min。加入丙酮,以胱氨酸尿:丙酮的比例8:1,最低胱氨酸尿浓度为75 mg/dL。关键词:胱氨酸,结晶,醋酸,丙酮,温度,pH
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引用次数: 0
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International journal of current multidisciplinary studies
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