• 대한물리치료과학회지
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• 제10권1호
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• pp.109-121
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• 2003

The purpose of this study was to test the difference of sitting balance control between a normal group and a group of patients with low back pain when their eyes were opened or closed. The 30 subjects of the control group had been chosen from healthy individuals who fit into the pre-designed criteria, and the 30 subjects of the experimental group were composed of the patients with LBP who had their treatment from S hospital from september 1, 2002, to October 30, 2002, and the subjects were measured by static balance test by using a balance performance monitor(BPM). Static balance test was done twice for each subject with his or her eyes opened and closed. Collected data were statistically analyzed by SPSS/PC using unpaired T-Test, Pained T-Test and multiple regression. The results were as follows: 1. In static balance test, normal group did not show statistical significance in sway angle(Anterior, Posterior, left and Right), sway path, sway area and maximal sway velocity, but showed statistical significance in mean balance with eyes opened and eyes dosed(P<.05) 2. In static balance test, LBP group did not show statistical significance in sway angle(Anterior, Posterior, left and Right), mean balance, sway path, sway area and maximal sway velocity with eyes opened and eyes dosed 3. With eyes opened, the comparison between the normal group and the LBP group showed statistical significance in sway angle(Anterior, Posterior, left and Right), mean valance, sway path, sway area and maximal sway velocity(p<.05). With eyes closed, normal group and LBP group did not show statistical significance in sway angle(Anterior and Right), sway area, but showed statistical significance in sway angle(Posterior and Left), mean balance, sway path, sway area and maximal sway velocity(p<.05) In conclusion, there was a significant difference in static sitting balance between normal group and LBP patients group. For future studies, I strongly suggest that researches be done on the treatment with LBP by predicting changes of postures and manipulating them.

• 암석학회지
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• 제3권3호
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• pp.196-219
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• 1994

Granulite complexes in northern (the Nangnim block), eastern (ther Kimchaek zone of the Macheonryong belt) and southern (separate windows among upper Proterozoic structure such as the Wonsan, Nampo and Haeju granulites) parts of the Northern Korea are studied. Multistage deformations, metamorphic and migmatitic events, and granite formations are recognized in these granulite complexes. Mineral thermobarometry and fluid inclusion investigationss are used to establish the P-T evolutionary trends during prograde and retrograde metamorphic events. The peak metamorphism of granulites is characterized by temperature near $800^{\circ}C$ and pressure near 5.5-6 kb. Retrograde evolution includes cooling at constant pressure or with variable pressure ranging up to 7-8 kb. This P-T change corresponds to the transition from high to moderate or low geothermal gradient. The subsequent cooling is ac-companied by significant decompression to 3-4 kb.

• 한국산업보건학회지
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• 제19권1호
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• pp.25-29
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• 2009

The purpose of this study was to investigate the effect of two different lifting posture on the plantar foot pressure, force and COP(center of pressure) trajectory path during object lifting. Fourteen healthy adults who had no musculoskeletal disorders were instructed to lift with two postures(stoop and squat) and two object weights(empty box and 10 kg box). Plantar foot pressures, forces and COP trajectory path were recorded by the F-mat system(Tekscan, Boston, USA) during object lifting with barefoot. Plantar foot surface was defined as seven regions for pressure measurement; two toe regions, three forefoot regions, one midfoot region and one heel region. Paired t-test was used to compare the outcomes of peak pressure and maximum force with different two lifting postures and two object weights. Plantar peak pressure and maximum force under hallux was significantly greater in squat posture than stoop posture during the two different boxes lifting(p<.05). During the empty box lifting, maximum force under lessor toes was significantly less and plantar peak pressure under second metatarsal region was significantly greater in squat than stoop(p<.05). Maximum force under heel was significantly less in squat than stoop posture during 10kg box lifting(p<.05). Finally, COP trajectory path was significantly greater in squat than stoop(p<.05). These findings confirm that there are significantly change in the structure and function of the foot during the object lifting with different posture. Future studies should focus on the contribution of both structural and functional change to the development of common foot problems in adults.

• 암석학회지
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• 제11권3_4호
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• pp.121-137
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• 2002

옥천변성대의 변성진화사를 밝히기 위한 연구는 지난 수십여년간 많은 학자들에 의해 수행되어 왔다. 그 결과 옥천변성대의 변성조건이 약 $490-630^{\circ}C$, 4.2-9.4 kbar에 해당되는 중온-중압형에 속함이 밝혀졌고, 또한 시계방향의 압력-온도-시간 경로를 경험했음이 알려졌다. 이러한 결과는 드러스트 나페에 의해 옥천변성대의 지각 두께가 증가했음을 지시한다. 그러나 변성작용에 관련된 조산운동을 규명하는데는 여러 가지 어려움이 남아 있다 특히 변성시기에 대한 논란은 오랫동안 거듭되어 왔으며, 최근의 연구 결과는 옥천변성대의 최고변성작용 시기를 석탄기와 페름기의 경계 부근인 약 300-280 Ma로 규정짓는다 따라서 옥천변성대와 태백산분지는 별개의 지구조구로서 서로 다른 진화 과정을 겪었으리라 추정되며, 이들은 약 250-220 Ma사이에 봉합되어 옥천대를 형성했을 가능성이 있다. 이와 같은 결과는 옥천대의 진화과정에 대한 기존의 생각과 일부 배치되며 새로운 지체구조적 파라다임을 요구한다. 또한 옥천대가 일본의 히다연변대-히다변성대에 대비될 수 있음을 시사한다.

• 한국동물생명공학회지
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• 제35권2호
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• pp.155-162
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• 2020

Equine follicle stimulating hormone receptor (eFSHR) has a large extracellular domain and an intracellular domain containing approximately 10 phosphorylation sites within the G protein-coupled receptor. This study was conducted to analyze the function of phosphorylation sties at the eFSHR C-terminal region. We constructed a mutant of eFSHR, in which the C-terminal cytoplasmic tail was truncated at residue 641 (eFSHR-t641). This removed 10 potential phosphorylation sites from the C-terminal region of the intracellular loop. The eFSHR-wild type (eFSHR-wt) and eFSHR-t641 cDNAs were subcloned into the pCMV-ARMS1-PK2 expression vector. These plasmids were transfected into PathHunter CHO-K1 Parental cells expressing β-arrestin 2 enzyme acceptor fusion protein and analyzed for agonist-induced cAMP response. The cAMP response in cells expressing eFSHR-t641 was lower than the response in cells expressing eFSHR-wt. EC₅₀ values of eFSHR-wt and eFSHR-t641 were 1079 ng/mL and 1834 ng/mL, respectively. eFSHR-t641 was approximately 0.58-fold compared with that of eFSHR-wt. The maximal response in eFSHR-wt and eFSHR-t641 was 24.7 nM and 16.7 nM, respectively. The Rmax value of phosphorylation sites in eFSHR-t641 was also decreased to approximately 68.4% of that in eFSHR-wt. The collective data implicate that the phosphorylation sites in the eFSHR C-terminal region have a pivotal role in signal transduction in PathHunter CHO-K1 cells, and indicate that β-arrestin is involved in coupling the activated receptors to the internalization system.

• 한국식품조리과학회지
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• 제29권5호
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• pp.533-541
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• 2013

The purpose of this article was to study the influence of tangible clues of raw-fish restaurants on consumers' emotional responses and repurchasing behavior in eastern area of Kangwon-province. In this study frequency analysis, reliability analysis, factor analysis and path analysis(SEM) were applied to analyze the data. Through path analysis tangible clues' performances had generally significant influences upon consumers' emotional responses to buy products of raw-fish restaurants. According to the results, exterior facility had positive influence on pleasure(p<0.001) and arousal(p<0.01). Interior facility had positive influence on pleasure(p<0.001) and arousal(p<0.001), but negative on dominance(p<0.01). And the others had positive influence on pleasure(p<0.05). Press copy had positive influence on pleasure(p<0.001) and arousal(p<0.001). And Pleasure and arousal had positive influence on repurchasing behavior(p<0.001). But Dominance didn't have significant influence on repurchasing behavior. As a result, we studied that the tangible clues was an effective marketing tactic to maintain and increase consumers' positive emotional reponses to repurchase at restaurants. Therefore it is finally needed that dining-out corporations manage tangible clues in a customer-maintaining without additional costs, and especially to use mixing tangible clues each other in some suitable condition.

• International Journal of Computer Science & Network Security
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• 제22권1호
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• pp.255-261
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• 2022

Routing Protocol for Low-Power and Lossy Networks (RPLs) in Internet of Things (IoT) is currently one of the most popular wireless technologies for sensor communication. RPLs are typically designed for specialized applications, such as monitoring or tracking, in either indoor or outdoor conditions, where battery capacity is a major concern. Several routing techniques have been proposed in recent years to address this issue. Nevertheless, the expansion of the network lifetime in consideration of the sensors' capacities remains an outstanding question. In this research, aANN-CUCKOO based optimization technique is applied to obtain a more efficient and dependable energy efficient solution in IOT-RPL. The proposed method uses time constraints to minimise the distance between source and sink with the objective of a low-cost path. By considering the mobility of the nodes, the technique outperformed with an efficiency of 98% compared with other methods. MATLAB software is used to simulate the proposed model.

• Journal of the Korean Society for Industrial and Applied Mathematics
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• 제12권4호
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• pp.227-238
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• 2008

In this paper we extend primal-dual interior point algorithm for linear optimization (LO) problems to $P_*({\kappa})$ linear complementarity problems(LCPs) ([1]). We define proximity functions and search directions based on kernel functions, ${\psi}(t)=\frac{t^{p+1}-1}{p+1}-{\log}\;t$, $p{\in}$[0, 1], which is a generalized form of the one in [16]. It is the first to use this class of kernel functions in the complexity analysis of interior point method(IPM) for $P_*({\kappa})$ LCPs. We show that if a strictly feasible starting point is available, then new large-update primal-dual interior point algorithms for $P_*({\kappa})$ LCPs have $O((1+2{\kappa})nlog{\frac{n}{\varepsilon}})$ complexity which is similar to the one in [16]. For small-update methods, we have $O((1+2{\kappa})\sqrt{n}{\log}{\frac{n}{\varepsilon}})$ which is the best known complexity so far.

• The Journal of Korean Physical Therapy
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• 제17권2호
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• pp.11-22
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• 2005

Purpose: The purpose of this study was to investigate the effects of aquatic health exercise program for the old. Methods: 20 healthy female with an average age of 71years($71{\pm}4.2$), were participated in this study. The aquatic health exercise program that include warm-up, stretching, strengthening exercise, WATSU and cool-down was performed in the pool two times a week for eight weeks(40min per one session). Body composition, strength of the both knee flexors and extensors, balance ability(sway area and path), whole body reaction time and flexibility(forward reaching test in long sitting) were measured before and after exercise. The data was analyzed with paired t-test to determine significant differences of all suggested factors between pre and post-exercise by make use of the SPSS(ver 10.0) package program. Results: The strength of the both knee flexors and extensors were increased significantly(right knee; p<0.01, left knee; p<0.05). Anteroposterior sway area (p<0.01), and sway path (p<0.001) of both leg were reduced significantly with eyes closed and opened. Whole body reaction time by optical stimulation was increased significantly (p<0.01) but whole body reaction time by auditory stimulation was no significant difference. The flexibility was increased significantly (p<0.01). Conclusion: Aquatic health exercise program can improve muscle strength, balance, whole body reaction, and flexibility.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2009년도 추계학술대회
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• pp.807-810
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• 2009

본 논문에서는 단순 다각형 내부에서 발생하는 최단 경로 문제를 다룬다. 다각형 내부에 위치한 두 점 사이의 최단 경로는 다각형의 외부를 지나지 않는 경로 중에서 길이가 가장 짧은 경로를 말한다. 일반적인 다각형에서 최단 경로를 구하는 선형 시간 알고리즘은 매우 복잡한 과정으로 알려진 삼각분할을 전처리과정으로 수행해야 한다. 따라서 이론적으로는 최적인 시간복잡도를 갖지만, 실제적으로는 구현이 어려울 뿐만 아니라 입력의 크기가 매우 크지 않은 한 수행 시간이 효율적이지 못하다. 본 논문에서는 특정한 다각형의 부류들에 대해서 각 대상에 적합한 최단 경로 알고리즘을 설계하는 것을 고려한다. 연구 결과로서 다각형의 부류로 널리 알려진 별형 다각형, 에지 가시 다각형, 단조 다각형 등에 대해서 효율적이면서 간단한 구현으로 최단 경로를 구하는 알고리즘들을 제시한다.