Examination was made of the amount of n-3 fatty acid in freshwater fish, abundantly present in the northeastern region of Thailand. Gas-liquid chromatgraphy was conducted for this porpose for 15 species of the fish. As a result, Channa striata (Striped snake-head fish) was found to be the best source for both eicosapentaenoic acid (EPA, 20:5 n-3) and docosahexaenoic acid (DHA, 22:6 n-3) with concentration of 13.1 and 10.5%, respectively. The results showed that 185.7g of Channa striata per day can provide 1g of n-3 fatty acid as recommended by the Food and Nutrition Board of the National Research Council of USA. There could be a potential source of adequate n-3 fatty acid and healthy food in this freshwater fish.
Abstract-This study investigates usability and effectiveness in shape and shape-color Geometric Shape Pattern-base CAPTCHA. The purpose of this study is to compare the amount of samples, sex and human generations on usability and effectiveness of the developed Geometric Shape Patternbase CAPTCHA. There are 400 participants who approaching this study on the internet. The findings suggest that usability shown in percentage of success, both shape and shape-color Pattern-base CAPTCHA show highest percentage of success at 95.83% and 95.64% respectively. Moreover, it is demonstrated that the amount of time spent for finding the correct answer relates to the amount of sample of series. In addition, differences for sex reveal that both female and male can solve two types of CAPTCHA similarly. However, differences for human generations suggest that Baby Boomer I spends 4.63 to 7.38 seconds less to solve the problem of Pattern-base CAPTCHA. Moreover, in color-shape pattern, they spend 3.88 to 6.72 seconds less.Index Terms-CAPTCHA, geometric shape, shape pattern. I. INTRODUCTIONThe main purpose of CAPTCHA is firstly, to automate Public Turning Test in order to separate computers and human being apart such as their names and roles. This can be done by using a challenge-response test. It is used in computing to determine whether the user is human or not.[1] Second main purpose of CAPTCHA is it is the first protector that guards the front gate of the computer's screen. It will decide who is allowed to pass the gate.These purposes are most important roles of CAPTCHA. That is because for example, if the guard of the house is frigid, unfriendly, cruel and cannot be able to communicate effectively; the guest will get angry or would like to stop contacting to the house-owner. Thus, the house-owner cannot access to what they want such as news, information, and he may not be able to contact to the others. On the other hand, if the guard of your house is ineffective, credulous and unable to screen everyone who want to access the house's gate; the house will be full of unscreened people. As the result of that, the house-owner will be put in danger. Furthermore, CAPTCHA is highly effective for being a good protector for your computer. It can be accessed easily for real human. It is also can be used by multinational Manuscript received October 10, 2017; revised December 10, 2017 Fig. 1. In addition, some programmers develop Audio-base and Image-base CAPTCHA. These CAPTCHAs are difficult for generating and evaluation [6]. Moreover, image-base CAPTCHA is need to store in big databases and need more time in generating phase [7]-[9]. The puzzle and MultiModal CAPTCHA [10], [11] claimed that they overcome language limitations. But we still found that it may use more time in implementation phase and some puzzles harder for the user to solve. Furthermore, all kinds of traditional CAPTCHAs have some problems about communication to user including problem about language or knowledge of the approach.Pattern is a series of number or figure that a...
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