Visualize online collocation dictionary with force-directed graph

For second-language learners, collocational knowledge is very important. Knowing collocational phrases allows learners to speak and write in their targeted language naturally and reduce dramatically side effect of their first language. In order for learners to learn collocations easily, a lot of learning methods have been introduced. Particularly, learning from online-collocational corpus has become popular due to its accessibility and massive database. Although, its current presentation of information is still simple, it can be improved by using optimized representations in order to help users learning. In this thesis, we represent a suitable way to visualize online collocational dictionary by using graph representation in order to facilitate users’ learning and provide flexible exploration. Animation is also used to increase level of engagement for users. We use force-directed model for the layout, but we develop our own graph component and combine some current algorithms in order to create a proper algorithm for our purposes. The implementation is tested by a small group of participants and the results are promising

An Evaluation of Challenges and Opportunities for Western Heads East [2017]

Western Heads East (WHE) is “a collaboration between Western staff, students, faculty, and African partners using probiotic food to contribute to health and sustainable development”. The primary objective of this program is to establish a sustainable grassroots social enterprise using the health benefits of probiotic yoghurt in order to improve health of Tanzanian community while empowering local women to become business owners and entrepreneurs. This report investigates the challenges, opportunities, local conditions and previous works to recommend a potential intervention that could support the sustainability and the intended value of probiotic yoghurt kitchens. There are two main end users for the WHE programs: the yoghurt kitchen clients, and the “Yoghurt Mamas” themselves. The clients of the yoghurt kitchens come from all sections of society, including HIV+, malnourished, ill, and low-income. “Yoghurt Mamas” refer to women who operate the yoghurt kitchens in their communities and provide education on health, nutrition, HIV prevention and domestic abuse. Two of the challenges come from the end users themselves are the misconception by clients that the yoghurt is a medication, and a negative cultural attitude toward women, resulting in decreased creativity and independence. In addition, poverty, women and children’s social hierarchy, lack of education, government restrictions poor infrastructure and technology in the local community makes the health problem even more complex. To further diagnose the health problem, previous reports on yoghurt kitchens businesses by the African Probiotic Yoghurt Network, past WHE Intern Reports and the Oyugis. Kenya Project were examined before designing an intervention. Based on research and collaborative teamwork, a three-pronged approach was essential for mitigating the current challenges and enhancing the success of the WHE kitchens. They include creating a strategic marketing plan, improving communication among the WHE team 3 and the Yoghurt Mamas, and empowering women to help them discover and find value in their strengths. To deliver the intervention, some of the major actions include: Design simple, eye-catching, visually appealing posters and using community leaders as a channel of word-of-mouth promotion. Improve the packaging of the probiotic yoghurt sachets, including the benefits and the instructions that is easy for users to understand and follow. Enhance the communication between the WHE organization, interns and Mamas by using the Internal Communication Matrix. Facilitate a workshop focusing on business literacy skills for empowering the Mamas. Some metrics to evaluate the progress of the three-pronged intervention include: Tracking the channel of promotion that the clients experienced such as word-of-mouth or posters. Feedback on the relative success or failure of the yogurt kitchen in relation to the previous year (when ICM was not implemented) from the Mamas. Questionnaires and feedback from the Mamas after the business literacy worksho

Research and Design of a Routing Protocol in Large-Scale Wireless Sensor Networks

无线传感器网络，作为全球未来十大技术之一，集成了传感器技术、嵌入式计算技术、分布式信息处理和自组织网技术，可实时感知、采集、处理、传输网络分布区域内的各种信息数据，在军事国防、生物医疗、环境监测、抢险救灾、防恐反恐、危险区域远程控制等领域具有十分广阔的应用前景。 本文研究分析了无线传感器网络的已有路由协议，并针对大规模的无线传感器网络设计了一种树状路由协议，它根据节点地址信息来形成路由，从而简化了复杂繁冗的路由表查找和维护，节省了不必要的开销，提高了路由效率，实现了快速有效的数据传输。 为支持此路由协议本文提出了一种自适应动态地址分配算——ADAR（AdaptiveDynamicAddre...As one of the ten high technologies in the future, wireless sensor network, which is the integration of micro-sensors, embedded computing, modern network and Ad Hoc technologies, can apperceive, collect, process and transmit various information data within the region. It can be used in military defense, biomedical, environmental monitoring, disaster relief, counter-terrorism, remote control of haz...学位：工学硕士院系专业：信息科学与技术学院通信工程系_通信与信息系统学号：2332007115216

Decomposing the ethnic gap in rural Vietnam, 1993–2004

This paper examines and decomposes the gap in per capita expenditures between majority and minority ethnic groups in rural Vietnam between 1993 and 2004. Over this period, the real expenditure gap between rural Kinh and Chinese-headed households and those headed by ethnic minorities increased by 14.6%.Approximately two-fifths of the mean gap is found to be due to differences in household endowments (in particular demographic structure and education), and at least half due to differences in returns to these endowments. Geographic variables explain less than one-fifth of the gap. Over half of the increase in the mean gap is linked to temporal changes in unobservable factors, and less than a quarter to the majority’s endowments improving more rapidly than those of the minorities. Broadly similar findings are detected using quantile regression analysis. These findings raise important questions concerning the drivers of the disadvantage faced by Vietnam’s ethnic minorities

Ethnic Minority Poverty in Vietnam

The paper examines various aspects of development of minority in Vietnam.ethnic, minorities, vietnam, living standards, monetary, non-monetary indicators, poverty,

Super-Selective Mesenteric Embolization Provides Effective Control of Lower GI Bleeding

Introduction. We aimed to assess the efficacy and safety of digital subtraction angiography (DSA) and super-selective mesenteric artery embolization (SMAE) in managing lower GI bleeding (LGIB). Method. A retrospective case series of patients with LGIB treated with SMAE in our health service. Patients with confirmed active LGIB, on either radionuclide scintigraphy (RS) or contrast-enhanced multidetector CT angiography (CE-MDCT), were referred for DSA +/− SMAE. Data collected included patient characteristics, screening modality, bleeding territory, embolization technique, technical and clinical success, short-term to medium-term complications, 30-day mortality, and progression to surgery related to procedural failure or complications. Results. There were fifty-five hospital admissions with acute unstable lower gastrointestinal bleeding which were demonstrable on CE-MDCT or RS over a 31-month period. Eighteen patients proceed to embolization, with immediate success in all. Eight patients (44%) had clinical rebleeding after intervention, warranting repeated imaging. Only one case (5.6%) demonstrated radiological rebleeding and was reembolized. Complication rate was excellent: no bowel ischaemia, ischaemic stricture, progression to surgery, or 30-day mortality. Conclusion. SMAE is a viable, safe, and effective first-line management for localised LGIB. Our results overall compare favourably with the published experiences of other institutions. It is now accepted practice at our institution to manage localised LGIB with embolization

TAD : time side-channel attack defense of obfuscated source code

Program obfuscation is widely used to protect commercial software against reverse-engineering. However, an adversary can still download, disassemble and analyze binaries of the obfuscated code executed on an embedded System-on-Chip (SoC), and by correlating execution times to input values, extract secret information from the program. In this paper, we show (1) the impact of widely-used obfuscation methods on timing leakage, and (2) that well-known software countermeasures to reduce timing leakage of programs, are not always effective for low-noise environments found in embedded systems. We propose two methods for mitigating timing leakage in obfuscated codes. The first is a compiler driven method, called TAD, which removes conditional branches with distinguishable execution times for an input program. In the second method (TADCI), TAD is combined with dynamic hardware diversity by replacing primitive instructions with Custom Instructions (CIs) that exhibit non-deterministic execution times at runtime. Experimental results on the RISC-V platform show that the information leakage is reduced by 92% and 82% when TADCI is applied to the original and obfuscated source code, respectively.National Research Foundation (NRF)Accepted versionThe research described in this paper has been supported by the National Research Foundation, Singapore under grant number NRF2016NCR-NCR001-006