• 한국포장학회지
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• 제21권1호
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• pp.35-40
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• 2015

결구상추는 급식업체에서 로컬리즘을 바탕으로 한 요구로 인해, 국내 생산품의 주년 공급이 필요하다. 그러나 하절기에 고온과 강우로 인해 적절한 결구상추의 공급이 원활하지 않다. 따라서 결구상추를 지속적으로 미리 저장하여, 출하가 어려울 때도 원활하게 공급하고자 하였다. 본 연구에서는 포장 및 저장방법에 따라 결구상추를 관행적으로 수확하여 PP플라스틱 농산물 유통상자에 단순 저장과, 결구상추의 줄기(경정) 10 cm 이상 남겨 부직포에 감싸서 저장, 상자에 농산물 식품 포장재인 LDPE 미세천공 필름을 덮어 저장하였으며, 또한 개별적으로 LLD-PE 포장재로 랩 포장하여 저장하였으며, 저장 온도는 $2^{\circ}C$에서 수행하였다. 저장 후의 포장 방법별 외관품위 및 생체중 감소에서는 개별적으로 랩 포장한 것이 21일까지의 단기적 저장에서 가장 좋았으며, 줄기를 보존하여 저장한 것, 상자에 필름 외피복, 무포장 저장 순이었다. 따라서 결구상추는 단기저장 시에 개별적인 포장 저장(저장방법 C)이 저장 3주까지 비교적 선도가 좋아, 결구상추의 단경기 원활한 공급을 위해 보급 가능한 기술로 보인다. 줄기를 물올림하면서 보존하는 방법(저장방법 D)은 재배방법과 연계하여 방법을 개선한다면, 새로운 저장방법으로 강구(講究)될 수 있을 것으로 예상된다. 결구상추의 단경기 공급을 위해서 생산이 어려운 시기에 포장과 저장방법을 개선함으로써 수급조절에 원활히 할 수 있는 가능성을 확인하였으나, 보다 선도를 유지하기 위해서는 국내 생산될 저장과 유통여건에 맞춘 추후의 연구가 더 필요할 것으로 생각된다.

• 한국공간정보시스템학회 논문지
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• 제8권2호
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• pp.75-89
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• 2006

최근 무선 기술과 측위 기술의 발전에 따라 위치 기반 서비스에 대한 관심이 크게 증가하고 있다. 기존 연구의 단일 노드 기반 시스템으로는 처리하기 힘든 휴대폰 사용자와 같은 최소 백만 단위 이상의 대용량의 객체를 처리하기 위해 클러스터 기반 분산 컴퓨팅 구조로 GALIS가 제안되었다. GALIS는 이동 객체의 현재 위치정보를 관리하는 SLDS와 과거 시간의 흐름에 따라 과거 위치정보를 관리하는 LLDS로 구성된다. SLDS와 LLDS는 분산된 다수의 노드로 구성되며 각 노드는 독립된 지역에 위치한 이동객체의 정보를 관리한다. 본 논문에서는 GALIS 프로토타입에 모니터링 기법을 적용하여 각 노드가 관리하는 이동 객체수의 변동에 따른 위치 정보관리 및 시공간 질의 처리시 각 노드에 걸리는 부하를 모니터링 함으로써 각 노드의 역할을 동적으로 조정할 수 있게 각 노드별 이동 객체 처리상황 및 부하를 관리한다. 또, GALIS 질의 처리 서브시스템 성능 향상을 위해 질의 처리 결과를 버퍼링하여 연속된 질의 처리시 발생할 수 있는 중첩된 질의 영역을 관리하는 버퍼링 기법을 제안한다. 버퍼링 기법을 통해 수행되는 질의는 중첩된 질의 영역을 제외한 부분으로 나누어 수행하기 때문에 시스템으로부터 구해야 하는 결과 세트의 크기를 줄여주는 역할을 하여 질의 처리 수행시간이 감소하도록 질의 처리 과정을 개선한다.

• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2004년도 Proceedings of the 4th Korea-China Joint Workshop on Nuclear Waste Management
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• pp.12-27
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• 2004

Pretreatment process consisted of submerged hollow-fiber microfiltration(HMF) membrane and spiral-wound nanofiltration(SNF) membrane has been developed by NETEC, KHNP for the purpose of improving the impurities of liquid radioactive waste before entering Selective Ion Exchange System(SIES). The lab-scale combined system was installed at Kori NPP #2 nuclear power plant and demonstration tests using actual liquid radioactive waste were carried out to verify the performance of the combined system. The submerged HMF membrane was adopted for removal of suspended solid in liquid radioactive waste and the SNF membrane was used for removal of particulate radioisotope such as, Ag-l10m and oily waste because ion exchange resin can not remove particulate radioisotopes. The liquid waste in Waste Holdup Tank (WHT) was processed with HMF and SNF membrane, and SIES. The initial SS concentration and total activity of actual waste were 38,000ppb and $1.534{\times}10_{-3}{\mu}Ci/cc$, respectively. The SS concentration and total activity of permeate were 30ppb and lower than LLD(Lower Limit of Detection), respectively.

• 대한기계학회논문집A
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• 제27권9호
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• pp.1531-1538
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• 2003

This paper compiles solutions of plastic $\eta$ factors and crack tip stress triaxialites for standard and nonstandard fracture toughness testing specimens, via detailed three-dimensional (3-D) finite element (FE) analyses. Fracture toughness testing specimens include a middle cracked tension (M(T)) specimen, SE(B), single-edge cracked bar in tension (SE(T)) and C(T) specimen. The ligament-to-thickness ratio of the specimen is systematically varied. It is found that the use of the CMOD overall provides more robust experimental J estimation than that of the LLD, for all cases considered in the present work. Moreover, the J estimation based on the load-CMOD record is shown to be insensitive to the specimen thickness, and thus can be used for testing specimen with any thickness. The effects of in-plane and out-of-plane constraint on the crack tip stress triaxiality are also quantified, so that when experimental J value is estimated according to the procedure recommended in this paper, the corresponding crack tip stress triaxiality can be estimated. Moreover, it is found that the out-of-plane constraint effect is related to the in-plane constraint effect.

• 정보관리학회지
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• 제37권2호
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• pp.145-169
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• 2020

도서관 LOD가 확산되지 못하는 현시점에서, 본 연구의 목적은 국내 도서관 LOD의 발행과 구축에 대한 현황을 살펴보고, 그 개선방안을 모색하기 위한 것이다. 사용한 연구방법은 문헌연구, 사례조사, 전문가 면담이다. 본 연구에서 제시된 개선방안은 첫째 도서관은 LOD 구축 대상의 중복을 피하고, 유일하고 특화된 자료를 구축할 필요가 있다. 둘째 도서관은 이용자 요구를 반영한 LOD 서비스를 개발하고, 편리한 LOD 인터페이스를 구현할 필요가 있다. 셋째 도서관은 데이터의 식별체계를 마련하고 전거파일을 구축할 필요가 있다. 넷째 도서관은 사서나 이용자에게 데이터 개방과 연계의 필요성을 인식시키고, 이를 위한 교육과 홍보의 기회를 제공할 필요가 있다. 다섯째 도서관은 통합 검색을 위해 LOD를 활용하고, 도서관 LOD를 검색할 수 있는 통합 플랫폼을 마련할 필요가 있다. 여섯째 도서관은 LOD 발행과 활용을 위한 협력을 강화하고, 실무협의체를 구성할 필요가 있다. 일곱째 정부는 LOD 추진에 대한 지속적인 의지로 강력한 정책을 추진해야 하며, 계속해서 예산 지원을 할 필요가 있다.

• 국제물리치료학회지
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• 제2권2호
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• pp.288-293
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• 2011

The purpose of this study is to examine the effects of gait training using functional electrical stimulation on the improvement of hemiplegic patients' functions for balance and gait velocity. The subjects of the experiment were determined to be 10 each hemiplegic patients who had been diagnosed with stroke or brain damage six months or longer earlier assigned to an experimental group and a control group respectively. The subjects were evaluated before the experiment using Tetrax and 10M gait tests, received gait training five times a week for four weeks using functional electrical stimulation and were evaluated after the experiment in the same method as used in the evaluation before the experiment. In order to examine differences between the experimental group that received gait training using functional electrical stimulation and the control group that was treated by functional electrical stimulation and received gait training thereafter, differences between before and after the experiment were analyzed using paired sample t-tests and differences in changes after the experiment between the experimental group and the control group were analyzed using independent sample t-tests in order to compare the two groups with each other. Experimental results showed significant differences in weight bearing, balance and gait velocity between before and after the experiment in the experimental group(p<.05). In the control group, whereas weight bearing and gait velocity did not show any significant difference between before and after the experiment(p>.05), balance showed significant differences(p<.05). Weight bearing, balance and gait velocity change rates showed significant differences between the experimental group and the control group(p<.05). In conclusion, it was indicated that gait training using functional electrical stimulation is effective for enhancing stroke patients' weight bearing rates, balance abilities and gait velocity.

• 대한정형도수물리치료학회지
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• 제5권1호
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• pp.59-74
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• 1999

66 patients with low back pain were evaluated to determine if any differences of weight bearing were existed between the same side leg that feel pain(pain side leg) and that without pain (non-pain side leg) of lower extremities while weight bearing. 66 patients were divided into 3 groups according to pain pattern such as low back pain only(26), radiating pain only(21) and low back pain with radiating pain (19). Control group were 28 normal persons. The weight bearing was rated by Limloader(Model LLD-2000, Ver 1.2) and analyzed by paired and independent t-test, one-way ANOVA, Dunan's analaysis and Pearson's correlation analysis. The results of this study were as follows : 1. In patient group, significant difference of weight bearing rating between pain side leg and non-pain side leg was found. There was borne significantly less weight bearing rating(14.68%) on the pain side leg(P<.001). 2. In normal group, there was no significant difference between left and right leg(P>.05). But there was significant difference(3.21%) in absolute difference of both leg(p<.001). 3. The difference of 1 and 2 was 11.47% : more difference of weight bearing rating between both legs in patient group than that of the control group(p<.001). 4. There were significant differences of weight bearing rating in those 3 groups : low back pain group(10.30%), radiating pain group (17.90%) and low back pain with radiating pain group (17.10%) (p<.001). 5. There was significant correlation between pain intensity and difference of weight bearing rating(p<.05). The severer pain intensity. the more difference of weight bearing rating was found. 6. There was no significant correlation between the age, height and duration of symptom, etc(p>.05).

• 방사성폐기물학회지
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• 제2권3호
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• pp.219-230
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• 2004

Most of the low-level liquid radioactive wastes generated from PWR plants are classified into high or low total suspended solid(HTDS or LTDS), and into radiochemical and radioactive laundry waste. Although the evaporation process has a high decontami- nation ability, it has several problems such as corrosion, foam, and congestion. A new liquid waste disposal process using the ion-exchange demineralizer(IED), instead of the current evaporation process, has been introduced into the Yonggwang NPP #5 and 6. These two methods have been compared to understand the differences in this study. Aspects compared here were the released radioactivity amount of the liquid radioactive wastes, the dose of off-site residents, the decontamination factor, and the amount of the solid radioactive wastes. The IED system is designed to discharge higher radioactivity about 20% than the evaporating system, and the actual radioactivity released from the evaporating and IED system were 0.473mCi and 1.098mCi, respectively. The radioactivity released from the IED was 2.32 times higher than that of the evaporating system. The dose of off-site residents was $2.97{\times}10^{-6}$mSv for the evaporating system, and $6.47{\times}10^{-6}$mSv for IED. The decontamination factor(DF) of the evaporator is, in most cases, far lower than the lower limits of detection(LLD) with the Ge-Li detector. Due to the low concentration of the liquid wastes collected from the liquid waste system, the decontamination factor of IED is very low. Since there is not enough data on the amount of solid radioactive wastes generated by the evaporation system, the comparison on these two systems has been conducted on the basis of the design, and the comparison result was that the evaporating system generated more wastes about 40% than IED.

• 한국축산식품학회지
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• 제39권5호
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• pp.756-767
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• 2019

This study aimed to evaluate the effect of doneness on the microbial, nutritional, and quality characteristics of 1.5 cm- and 2.0 cm-thick pork neck steaks. Pork neck meat was obtained within 24 h after slaughtering, cut into 1.5 cm- and 2.0 cm-thick slices (n=5), packed in LLD-PE wrap, and stored at $4{\pm}2^{\circ}C$ for 7-10 days until aerobic plate counts (APC) reach 5.51-6.50 Log CFU/g. Then, the pork meat was cooked on a frying pan till it was medium-rare, medium, or well-done. The microbial inhibition rates of the 1.5 cm- and 2.0 cm-thick steak in medium-rare state were 58.26% and 51.70%, respectively, whereas it was 100% for medium-done pork steak of either thickness. The total calories of the 1.5 cm- and 2.0 cm-thick well-done pork steaks were 643.61 kcal/100 g and 675.00 kcal/100 g, respectively, which was higher than that in medium-rare and medium-done steaks. The retention ratios for Fe and K in the well-done steak were significantly lower than those in the medium and medium-rare steak of either thickness (p<0.05). The shear force of the medium-rare and medium steak did not differ, whereas that of the well-done steak was significantly higher than that of the medium-rare steak of either thickness (p<0.05). We observed that the well-done pork steak had tough texture, low mineral content, and high calories. Therefore, consumption of medium and medium-rare pork is more beneficial than that of well-done pork.

• Journal of Radiation Protection and Research
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• 제48권2호
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• pp.100-106
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• 2023

Background: As breast tissue expanders consist of metallic materials in the needle guard and ferromagnetic injection port, irradiation can produce radioactivation. Materials and Methods: A CPX4 (Mentor Worldwide LLD) breast tissue expander was exposed using the Versa HD (Elekta) linear accelerator. Two photon energies of 6 and 10 MV-flattening filter free (FFF) beams with 5,000 monitor units (MU) were irradiated to identify the types of radiation. Furthermore, 300 MU with 10 MV-FFF beam was exposed to the CPX4 breast tissue expander by varying the machine dose rates (MDRs) 600, 1,200, and 2,200 MU/min. To assess the instantaneous dose rates (IDRs) solely from the CPX4, a tissue expander was placed outside the treatment room after beam irradiation, and a portable radioisotope identification device was used to identify the types of radiation and measure IDR. Results and Discussion: After 5,000 MU delivery to the CPX4 breast tissue expander, the energy spectrum whose peak energy of 511 keV was found with 10 MV-FFF, while there was no resultant one with 6 MV-FFF. The time of each measurement was 1 minute, and the mean IDRs from the 10 MV-FFF were 0.407, 0.231, and 0.180 μSv/hr for the three successive measurements. Following 10 MV-FFF beam irradiation with 300 MU indicated around the background level from the first measurement regardless of MDRs. Conclusion: As each institute room entry time protocol varies according to the working hours and occupational doses, we suggest an addition of 1 minute from the institutes' own room entry time protocol in patients with CPX4 tissue expander and the case of radiotherapy vaults equipped with a maximum energy of 10 MV photon beams.