• Journal of the Korean Society of Food Science and Nutrition
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• v.21 no.6
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• pp.712-718
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• 1992

This experiment was carried out to investigate some physico-chemical properties of myofibrillar proteins isolated from alkaline and acid rigor muscles of rabbit. The degree of fragmentation was about 0.35 at 3 days of postmortem in acid rigor muscle fiber, whereas it was only 0.3 at 7 days of postmortem in alkaline rigormuscle fiber. $Mg^{2+}$-activated ATPase activities of actomyosin were increased to the highest level at 1st day in acid rigor and at 3rd day in alkaline rigor muscle fiber. $Ca^{2+}$-activated ATPase activities of actomyosin were slightly increased at postmortem. $Mg^{2+}$-, and $Ca^{2+}$-activated ATPase activities were higher in alkaline rigor muscle than those in acid rigor muscle at postmortem. Solubility of actomyosin increased with postmortem but no differences were observed in rigor types. SDS-PAGE(sodium dodecyl sulfate polyacrylamide gel electrophoresis) band patterns of myofibrils did not show significant differences between rigor types, but newly 30.000 dalton proteins were appeared at 3 day postmortem in both rigor types.

• Knowledge Management Research
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• v.16 no.2
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• pp.29-45
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• 2015

The number of studies on social media has increased rapidly worldwide. There has been, however, little effort to assess the achievements and limitations of social media studies up to present. The purpose of this study is to provide a systematical viewpoint on social media research published by scholarly business-related journals. Our analysis focus on research topic, functionality, targeted media types, methodology, and characteristics. User research receives the most attention, followed by effect research in terms of developmental models of media research agenda. The major methodological trend is online survey. Facebook and twitter are the two most popular mediums studied in literature, and social media is mainly characterized as information sharing as well as relationship building. Two recommendations are suggested in ways to strengthen social media research: more various topics and application areas, and the rigor and diversity of research methods.

• Journal of Educational Research in Mathematics
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• v.11 no.2
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• pp.385-402
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• 2001

The purpose of this study is to conceptualize 'proof' school mathematics. We based on the assumption the following. (a) There are several different roles of 'proof' : verification, explanation, systematization, discovery, communication (b) Accepted criteria for the validity and rigor of a mathematical 'proof' is decided by negotiation of school mathematics community. (c) There are dynamic relations between mathematical proof and empirical theory. We need to rethink the nature of mathematical proof and give appropriate consideration to the different types of proof related to the cognitive development of the notion of proof. 'proof' in school mathematics should be conceptualized in the broader, psychological sense of justification rather than in the narrow sense of deductive, formal proof 'proof' has not been taught in elementary mathematics, traditionally, Most students have had little exposure to the ideas of proof before the geometry. However, 'proof' cannot simply be taught in a single unit. Rather, proof must be a consistent part of students' mathematical experience in all grades, in all mathematics.

• Journal of the Korean Society of Physical Medicine
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• v.5 no.2
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• pp.165-172
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• 2010

Purpose : The purpose of this study was to investigate curriculums of physical therapy education. Methods : We identified the curriculums of physical therapy education by internet. Results : In Korea, education on physical therapy started as a two-year program in 1963, and recently reorganized as three or four years programs. Currently some ten schools offer physical therapy programs for master's and doctor's degrees. The member countries of the World Confederation for Physical Therapy (WCPT) provide approximately ten types of education programs that take two to six years. In Korea, the same programs have three or four years of education periods. The American Physical Therapist Association (APTA) launched on the doctor of physical therapy (DPT) course in the late 1990s, encouraging physical therapists to acquire a doctorate degree. In addition, the U.S. Vision 2020 envisions that all physical therapists acquire DPT by the year 2020. As the medical field becomes more professional and specialized, physical therapists are expected to supplement and even replace works of doctors, instead of merely assisting them. It is necessary to reinforce education programs and improve related school systems to enhance status of physical therapist in accordance with the changing social needs and to provide quality service to patients. Conclusion : We suggest to change the curriculum of Korea. It is more accurately reflected the scope, depth, breadth, and rigor of the high-quality education preparation needed for current and future practice.

• Journal of Animal Science and Technology
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• v.64 no.3
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• pp.397-408
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• 2022

Rinse & Chill^® technology (RCT) entails rinsing the vasculature using a chilled isotonic solution (3℃; 98.5% water and a blend of dextrose, maltose, and sodium phosphates) to rinse out the residual blood from the carcass. Infusion of pre-chilled solutions into intact animal carcasses immediately upon exsanguination is advantageous in terms of lowering the internal muscle temperature and accelerating chilling. This technology is primarily used for purposes of effective blood removal, favorable pH decline, and efficient carcass chilling, all of which improve meat quality and safety. Although RCT solution contains some substrates, the pre-rigor muscle is still physiologically active at the time of early postmortem and vascular rinsing. Consequently, these substrates are fully metabolized by the muscle, leaving no detectable residues in meat. The technology has been commercially approved and in continuous use since 2000 in the United States and since 1997 in Australia. As of January 2022, 23 plants have implemented RCT among the 5 countries (Australia, US, Canada, New Zealand, and Japan) that have evaluated and approved RCT. All plants are operating under sound Sanitation Standard Operation Procedures (SSOP) and a sound Hazard Analysis Critical Control Point (HACCP) program. No food safety issues have been reported associated with the use of this technology. RCT has been adapted by the meat industry to improve product safety and meat quality while improving economic performance. Therefore, this review summarizes highlights of how RCT technically works on a variety of animal types (beef, bison, pork, and lamb).

• Journal of the Korea Convergence Society
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• v.9 no.5
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• pp.33-41
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• 2018

The purpose of this study is to develop more accurate and robust emotion prediction neural network (EPNN) model by combining heart rate variability (HRV) and neural network. For the sake of improving the prediction performance more reliably, the proposed EPNN model is based on various types of activation functions like hyperbolic tangent, linear, and Gaussian functions, all of which are embedded in hidden nodes to improve its performance. In order to verify the validity of the proposed EPNN model, a number of HRV metrics were calculated from 20 valid and qualified participants whose emotions were induced by using money game. To add more rigor to the experiment, the participants' valence and arousal were checked and used as output node of the EPNN. The experiment results reveal that the F-Measure for Valence and Arousal is 80% and 95%, respectively, proving that the EPNN yields very robust and well-balanced performance. The EPNN performance was compared with competing models like neural network, logistic regression, support vector machine, and random forest. The EPNN was more accurate and reliable than those of the competing models. The results of this study can be effectively applied to many types of wearable computing devices when ubiquitous digital health environment becomes feasible and permeating into our everyday lives.