• Korean Journal of Materials Research
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• v.11 no.12
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• pp.1028-1034
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• 2001

The 2.5 vol% TiNi/6061Al composites were fabricated by permanent mold casting. The microstructures and tensile test for the cold rolled composites with maximum 50% reduction ratio were investigated. In the case of TiNi fiber with 2mm interval in preform, the interface bonding of fabricated composites were good, interface diffusion layer of this composites was made by the mutual diffusion. Transverse section of TiNi fiber was decreased with increasing reduction ratio and longitudinal section of TiNi fiber showed multiple wave phenomenon. And the tensile strength of composites at 38% reduction ratio was the most high. In the case of over 38% reduction ratio, the decrease of the tensile strength was due to TiNi fiber rupture by excess working. The fracture mode was appeared brittle fracture with increasing reduction ratio.

• PNF and Movement
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• v.16 no.2
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• pp.169-178
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• 2018

Purpose: This study aimed to investigate the effect of angular joint mobilization (AJM) on the shoulder pain, range of motion, and functional improvement in a patient with shoulder adhesive capsulitis. Methods: The patient diagnosed with right shoulder adhesive capsulitis by an orthopedic surgeon was a 60-year-old male, right hand/arm dominant, with a height of 175 cm and weight of 75 kg. The patient received 12 sessions of AJM once or twice per week for eight weeks. AJM was applied for 5 min each of flexion, abduction, external rotation, internal rotation, for a total of 20 min per session. The visual analog scale, the goniometer, and the Oxford shoulder score were used to measure pain, range of motion, and shoulder pain & disability index, respectively. Results: After all the treatments, the pain decreased from 6 to 2 points. The range of motion increased in flexion by $54.3^{\circ}$ from $125^{\circ}$ to $179.3^{\circ}$, abduction by $38^{\circ}$ from $140^{\circ}$ to $178^{\circ}$, external rotation by $54.4^{\circ}$ from $30.3^{\circ}$ to $84.7^{\circ}$, and internal rotation by $25^{\circ}$ from $45^{\circ}$ to $70^{\circ}$. The shoulder disability index decreased from 33 points to 17 points. Conclusion: This study found that AJM has a positive effect on the improvement of shoulder pain, range of motion, and function in a patient with shoulder adhesive capsulitis. Further studies on AJM are needed in the future.

• Journal of the Korean Society for Nondestructive Testing
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• v.21 no.6
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• pp.634-641
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• 2001

Shape memory alloy has been used to improve the tensile strength of composite by the occurrence of compressive residual stress in matrix using its shape memory effect. In order to fabricate shape memory alloy composite, TiNi alloy and A16061 were used as reinforcing material and mix, respectively. In this study, TiNi/A16061 shape memory alloy composite was made by using hot press method. However, the specimen fabricated by this method had the bonding problem at the boundary between TiNi fiber and Al matrix when the load was applied to it. A cold rolling was imposed to the specimen to improve the bonding effect. It was found that tensile strength of specimen subjected to cold rolling was more increased than that of specimen which did not underwent cold rolling. In addition, acoustic emission technique was used to quantify the microscopic damage behavior of cold rolled TiNi/A16061 shape memory alloy composite at high temperature.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.21 no.3
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• pp.405-413
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• 1997

In the present paper, it is attempted to reconfirm the "Intelligent" material properties using both the sintered TiNi/Al(1100) matrix composite made by powder metallurgy method and the squeeze-casted TiNi/Al6061 specimens. A metal matrix composite is, its fault has been considered to deteriorate a strength of composite by heating residual stress of the matrix. Therefore, it is necessary to remove a tensile residual stress, to produce the strength of a composite better. On the contrary, if compressive residual stress happens in matrix of composite in place of tensile residual stress, it will make the strength of composite better. So that, this paper introduce the development of a high strength of composite, by using compressive residual stress well, on the study. By using these specimens, shape memory strengthening effects in tensile strength and fatigue crack propagation above inverse transformation temperature of TiNi fiber were investigated. We occurs the prestrain and volume fraction for to discuss the effects of a composite strength. Moreover, by SEM observation, the effect of the residual stress at the interface between Al matrix and TiNi fiber and some brittle precipitation layers such as inter metallic compounds on fracture mechanisms was discussed metallurgically.urgically.

• Journal of the Korean Society of Physical Medicine
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• v.8 no.4
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• pp.549-558
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• 2013

PURPOSE: This study is designed as a retrospective study, and identified the clinical usability of Sit to Stand (STS) test for predicting of fall incidence in stroke patients who experienced a fall within 1 year. METHODS: Between July 2011 and November 2012, 69 inpatients with stroke in K rehabilitation hospital were participated under voluntarily signing the informed consent form. STS test and 10m walk test (10MWT) were used to assess the muscle strength of lower-extremity and walking velocity, respectively. Also, we tested dynamic balance and motor function of lower-extremity in affected-side using with the Berg balance scale (BBS) and the Fugl-Meyer assessment of lower extremity (FM-L/E). METHODS: There were significant differences between subjects with fall-experienced group and without subjects without fall-experienced group in STS test, 10MWT, BBS scores and FM-L/E. STS test significantly showed a negative correlation between 10MWT (r=-.657), BBS (r=-.512), and FM-L/E (r=-.563). And, 10MWT have a influence on the performance of STS test (the capacity of explanation = 20%). The cut-off value of STS performance predicting falls experience is ${\geq}14.36$ seconds (sensitivity=76%; specificity=79%, area under curve=.785). According to logistic regression analysis of falls experience, subjects ${\geq}14.36$ s showed that 4.164 times (odd ratio) increased in falls than subjects < 14.36 s in STS test. CONCLUSION: This study demonstrated that STS test may be a useful tool predicting and measuring falls in patients with stroke. Further study will be needed to elucidate the kinematic analysis of STS test and the relationship between physical activity level and falls in stroke patients.

• The Korean Journal of Pain
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• v.13 no.1
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• pp.55-59
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• 2000

Background: Intrathecal injection of morphine is widely used in the management of postoperative pain because it provides long-lasting analgesia. Intramuscular caroverine and tiaprofenate are used to produce postoperative pain relief. This study was designed to evaluate the analgesic efficacy and quality of sleep achieved with intrathecal morphine and those of intramuscular caroverine and tiaprofenate in transurethral resection of the prostate (TURP). Methods: Forty patients undergoing elective TURP were randomly allocated into 2 groups as follows: Group M (n=20); 0.25 mg of morphine hydrochloride mixed in 7.5 mg of 0.5% hyperbaric bupivacaine was administered at the time of induction of spinal anesthesia. Group S (n=20); 7.5 mg of 0.5% hyperbaric bupivacaine was administered intrathecally and caroverine and tiaprofenate intramuscularly at every 8 hr and 12hr postoperatively for management of postoperative pain. We evaluated the analgesic efficacy with visual analog scale (VAS), quality of sleep, and side effects. Results: VAS at 6, 12 and 24 hours after operation were significantly less (p<0.01) in the group M than in the group S. Group M was superior to group S with respect to quality of sleep (p<0.01). In the group M, the incidence of nausea was 30% (6/20) and that of pruritus was 35% (7/20) and clinical respiratory depression did not occur. Conclusions: Intrathecal 0.25 mg morphine provides good postoperative analgesic effect. but intramuscular caroverine and tiaprofenate does not.

• Journal of the Korean Society of Physical Medicine
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• v.5 no.3
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• pp.487-498
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• 2010

Purpose : To investigate the immediate effects of transcutaneous electrical nerve stimulation(TENS) on the spasticity and the balance in the stroke patients. Methods : 26 subjects with spasticity over lower limbs were allocated randomly into two groups : (1) TENS group, (2) placebo-TENS group. TENS was applied on the both gastrocnemius for 60 minutes(100 Hz, 0.25 ms, 2 times sensory threshold). The modified Ashworth Scale(MAS) and Manual Muscle Tester were used to assess the spasticity of the ankle plantar flexors. Static balance under three conditions was measured by force-plate; in (1) the condition of standing with eyes opened, (2) with eyes closed and (3) the condition of standing on unstable surface with eyes opened. Results : When compared with the pre and post TENS application, TENS showed significant reduction of ankle spasticity in MAS and MMT measurement. Also, Application of high-frequency TENS improved the balance under three conditions. Conclusion : A single session of TENS to stroke patients could reduce spasticity and improve the balance.

• The Korean Journal of Pain
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• v.22 no.3
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• pp.206-209
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• 2009

Background: The essential oil of Ocimum basilicum (EOOB) has a pleasant aroma and is known to have antimicrobial and insecticidal activities. In addition, it is used as a pain reliever in folk medicine. However, there are few reports on the antinociceptive activities of EOOB. Methods: This study examined the antinociceptive effects of EOOB using formalin and a plantar test in mice. In the formalin test, EOOB (50 mg/kg, 100 mg/kg, 150 mg/kg) was administered intraperitoneally and the licking time of the mice was measured. In the plantar test, intraperitoneal EOOB (50 mg/kg, 100 mg/kg) was administered and the withdrawal latency was measured using the Hargreaves method. Results: In the formalin test, EOOB (50 mg/kg, IP) showed significant decreases in licking time in the second phase. On the other hand, in the plantar test, there were no significant effects in any of the groups examined. Conclusions: These results support the traditional use of EOOB for the treatment of painful conditions. However, there is a need for more research to determine the active chemical constituents and the precise mechanism.

• Clinical and Experimental Reproductive Medicine
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• v.25 no.3
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• pp.341-348
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• 1998

Objective: To determine the reproductive outcomes of women undergoing microsurgical reversal of tubal sterilization at age 36 years or older. Materials and Methods: A series of 133 patients who received microsurgical reversal of the previously sterilized fallopian tubes at Seoul National University Hospital from July, 1980 to January, 1992 was reviewed and evaluated for clinical characteristics, pregnancy rates, and factors influencing the outcome of tubal reversal. Results: Of 133 patients, 78 (58.6%) had been sterilized by laparoscopic cautery. Loss of children was a leading cause for tubal reversal. The mean interval from tubal sterilization to tubal reversal was 65.0 months. The overall pregnancy rate was 52.6% (70/133), and the mean interval was 9.4 months from tubal reversal to pregnancy. Excluding 7 patients who were lost to follow-up, 76 pregnancies were confirmed in 63 patients with the delivery rate per patient of 66.7% (42/63). There were no significant differences in age, duration of tubal sterilization, postoperative tubal length between pregnant and non-pregnant groups. Conclusions: Microsurgical reversal of tubal sterilization could be a justifiable method in women 36 years age or older.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.51
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• pp.465-495
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• 2011

Domestic franchised businesses have been showing relatively fast growth, but the growth is expected to slow down as in those developed countries. In face of this changing market environment, domestic franchisers will have to turn their eyes abroad to achieve sustainable growth. On the other hand, more international franchisors could pursue expanding into the Korean market due to economic or strategic reasons in their home countries. In general, enterprises are faced with several barriers when entering foreign markets by franchising their operation. Issues relating to such entry barriers can be broadly classified into legal and managerial. To begin, international franchising necessitates enterprises to handle various aspects of legal issues. There are no internationally unified rules for franchise agreements as in international goods purchase contracts. This forces franchisors to have deep knowledge of concerned regulations and practices of each of the individual target countries, in particular franchising practices which differ from those of their own countries in terms of rights and obligations of the involved parties. Having regard to this situation, this study reviewed the EU's PEL CAFDC and other domestic and overseas regulations governing franchising. From the results, several contractual obligations were derived that need to be taken into account when handling the issues around the international franchise agreement. In closing this paper mainly having in mind enterprises in various business lines seeking to expand into international franchising, some unmet needs are worth commenting. First, there is an urgent need to establish practical guidelines along with the model agreement addressing the issues of international franchising in the absence of any unified international rules. Second, to meet the first need above, it is needed that the relevant authorities conduct a comprehensive review of the existing franchising regulations available across overseas countries and, based on the results, embark on gathering good common elements in the existing franchising regulations in individual countries, ultimately developing the best possible guidelines and examples.