Umaporn Supasitthimethee

Social network user identification

Many people use more than one social network services (SNS). They create accounts for sharing both private and public information. These information are digital footprints that can be used to identify the owners. To identify the account identities, it is necessary to gather user information regarding their online behaviors. It can be used for marketing and customer interaction. In this paper, the architecture for matching accounts across multiple SNSs was proposed. It is designed for extensibility and configurability so that, given an account of a person on an SNS, it can be used to find other accounts belonging to the same person on any SNS. The system collects account information, such as username, friends, and interests from accounts on various SNSs and compare them using Jaro-Winkler distance algorithm. To be specific, this system focuses on finding Twitter accounts of a person given his/her Facebook account. An experiment of 138 user accounts are tested and its accuracy was 55%, which is almost twice better than a previous research on a similar situation.

IoT Planting: Watering system using mobile application for the elderly

Nowadays, Thailand has become an aged society. The elderlys mental health has decreased resulting from physiological changes. At present, technology has connect everything to the world of the Internet called the Internet of Things (IoT). IoT can be applied to many ways, which can improve the quality of life and reduce spaces between the elderly and technology. In this paper, we studied the situation of the elderly and proposed the IoT Planting which consists of gardening platform prototype with soil moisture, temperature, water sensor, grow light, and Android application for the elderly. An evaluation was performed by Technology Acceptance Model (TAM). The result represents that the elderly perceived the usefulness and found that it easy to use contrary to their expectations. Moreover, by reviewing their opinion, it was found out that they have a positive attitude toward our application and willingness to use it.

Computational Design of Hypothetical New Peptides Based on a Cyclotide Scaffold as HIV gp120 Inhibitor

Cyclotides are a family of triple disulfide cyclic peptides with exceptional resistance to thermal/chemical denaturation and enzymatic degradation. Several cyclotides have been shown to possess anti-HIV activity, including kalata B1 (KB1). However, the use of cyclotides as anti-HIV therapies remains limited due to the high toxicity in normal cells. Therefore, grafting anti-HIV epitopes onto a cyclotide might be a promising approach for reducing toxicity and simultaneously improving anti-HIV activity. Viral envelope glycoprotein gp120 is required for entry of HIV into CD4+ T cells. However, due to a high degree of variability and physical shielding, the design of drugs targeting gp120 remains challenging. We created a computational protocol in which molecular modeling techniques were combined with a genetic algorithm (GA) to automate the design of new cyclotides with improved binding to HIV gp120. We found that the group of modified cyclotides has better binding scores (23.1%) compared to the KB1. By using molecular dynamic (MD) simulation as a post filter for the final candidates, we identified two novel cyclotides, GA763 and GA190, which exhibited better interaction energies (36.6% and 22.8%, respectively) when binding to gp120 compared to KB1. This computational design represents an alternative tool for modifying peptides, including cyclotides and other stable peptides, as therapeutic agents before the synthesis process.

Smart Healthcare: Basic health check-up and monitoring system for elderly

Thailand has become an ageing society. The consequences of the situation appear to be an issue for health organizations to prepare efficient, safe and equitable health care for an aging population. Throughout the past decades, technology has been frequently utilized because it has provided new methods to support the facilitate health care services. In this paper, we studied the health situation of the elderly and proposed the Smart Healthcare system. It consists of a bio-signal measuring prototype (blood pressure, heart rate and temperature) and a web application for both doctors and the elderly. It also includes an alert button. Evaluation was performed in two parts, which were qualitative interviewing and quantitative survey. We interviewed three doctors for confirmation regarding their opinion of the system (i.e. usefulness, visualizing data, and suggestions). Doctors replied that the system is useful for the elderly who are unaware of their own health information; consequently, they may unable to control their own health. For visualizing data, doctors normally view the measured data in number format. For displaying result to the elderly, it should be explained in simple statements that are easy to understand or described using color. Moreover, provision of an alert button is a valuable idea for saving lives. For the quantitative survey, we used the Technology Acceptance Model (TAM) as the core model to measure the acceptance by the elderly. Thirty 60–80-year-old elderly people participated in the survey. The result indicated that the elderly is perceived the usefulness of the system and were willing to use it unless they found it difficult to learn or understand because of possible negative attitudes toward new technologies.

AccAuth: Accounting system for OAuth protocol

When a user accesses a resource, the accounting process at the server side does the job of keeping track of the resource usage so as to charge the user. In cloud computing, a user may use more than one service provider and need two independent service providers to work together. In this user-centric context, the user is the owner of the information and has the right to authorize to a third party application to access the protected resource on the users behalf. Therefore, the user also needs to monitor the authorized resource usage he granted to third party applications. However, the existing accounting protocols were proposed to monitor the resource usage in terms of how the user uses the resource from the service provider. This paper proposed the user-centric accounting model called AccAuth which designs an accounting layer to an OAuth protocol. Then the prototype was implemented, and the proposed model was evaluated against the standard requirements. The result showed that AccAuth passed all the requirements.

Ticket model: a generalised model for internet-based three-party authorisation systems

Using web technology, a user may use a web browser to access a service on a web application that runs on a server. In many cases, a user needs to perform the task that requires the use of multiple web applications. Traditionally, a user needs to give his credentials to a third party website which leads to privacy and security issues. Though there are many existing protocols, most of them are ad hoc. Since the way a user accesses two independent web applications can be different, we define a web-based three-party communication model. After that, the well-accepted existing protocols are analysed. However, we found the common work flow in the communication though the protocols are in different scenarios. Therefore, we proposed the generalised model called Ticket model. Then, the details were discussed using a reference implementation. Finally, an accounting extension was added to the reference implementation as an example.

A Generalized Model for Internet-Based Access Control Systems with Delegation Support

In the web environment, web browsers use HTTP/HTTPS to communicate between users and web/application servers. However, many internet activities require interactions among three parties without compromising confidentiality. For example, an e-commerce transaction requires a buyer to authorize an e-commerce website to withdraw money from the buyer’s bank account at an internet banking website. Although several existing works have been proposed to solve this problem, they are done in ad-hoc manners or lack of some important properties. This paper proposes a model, called PRA (Provider-Requestor-Authorizer), for generalizing three-party communication in the web-environment in order to identify desirable properties that can be used to measure the goodness of protocols for and classify them. We found that PRA model can generalize three-party communication protocols to a single model from conceptual level to implementation level.

Answer Aggregation for Keyword Search over Relational Databases

with the amount of text data stored in relational databases growing rapidly, the need of the user to search such information is dramatically going up. Many existing approaches focus on finding a tuple matching a keyword query and return the result as a joining network of tuples of one or more tables. In this paper, we formulate an answer aggregation of keyword search over relational databases problem which merges related joining tuples from multiple tables to a single tuple to reduce redundancy in the results and improve the search quality. We developed an approach which exploits the tuple identity information for merging tuples rather than scanning throughout the results to find the common values. We further proposed a pruning algorithm which greatly reduces the number of redundant results after merging. We have conducted experiments extensively on two well-known databases (DBLP and IMDB). The experimental results show that the number of tuples in the results was dramatically reduced which noticeably improved the search quality while the merging time and the pruning time were relatively low when compared to the searching time.

Essential social attributes and Habit in fitness mobile applications usage to motivate a physical activity

This paper is presented the study of the social influence by using social features in fitness mobile applications and habit that persuades the working-aged people, in the context of continuous fitness mobile application usage to promote the physical activity. Our conceptual model consisted of Habit and Social Influence. The social features based on the Persuasive Technology (1) Normative Influence, (2) Social Comparison, (3) Competition, (4) Co-operation, and (5) Social Recognition were embedded in the Social Influence construct of UTAUT2 model. The questionnaires were an instrument for this study. The target group was 443 working-aged people who live in Thailands central region. The results reveal that the factors significantly affecting Behavioral Intention toward Use Behavior are Normative Influence, Social Comparison, Competition, and Co-operation. Only the Social Recognition is insignificantly affecting Behavioral Intention to use fitness mobile applications. The Behavioral Intention and Habit also significantly support the Use Behavior. The social features in fitness mobile application should be developed to promote the physical activity.

Factors influencing the Thai elderly's intention to use social network for Quality of Life: A case study LINE application

The structure of the population pyramid has changed because of the rapid rise in the amount of population aged 60 years or over. Many regions of the world are moving into an aging society. Meanwhile, the information society is a society today; everything is connected to the internet. Social Networks play a huge role in the daily lives of many young people. Furthermore, there are also many older people who are interested in learning and using the same social networks. This study aimed to investigate the factors that influence the Thai elderlys intention to use the LINE application for Quality of Life. This study was developed by integrating the Unified Theory of Acceptance and Use of Technology (UTAUT). This empirical research model used survey data from 434 elderly participants in Thailand. All six research hypotheses were positively supported. The results indicated that the factor most associated with behavioral intention to use the LINE application in the elderly for quality of life was Performance Expectancy and Effort Expectancy. In addition, the study also indicated that when the elderlys behavioral intention in using the LINE application could predict the relationship and improve the quality of life 30.7%. Moreover, the study suggests that the elderly with behavioral intention to use the LINE application affect the Quality of Life at a moderate level. The use of the LINE application for the elderly can play a part in promoting and developing their quality of life.