• Food Science and Biotechnology
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• v.17 no.2
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• pp.389-395
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• 2008

The objective of this study was to examine the effects of crude protease from Bacillus polyfermenticus SCD and marination time on quality of pork and beef jerky. Neither pork nor beef jerky showed a significant difference in pH among all treatments, and each protease was found to have a greater effect on the color of beef jerky. The hardness was significantly lower in all jerky treated with each protease, however the textural properties of jerky were not significantly different with regard to marination times. Water content was not affected by protease addition or marination times, however the water activity was lower in jerky treated with protease. The rehydration capacity of pork jerky was higher in jerky treated with protease, whereas that of beef jerky was higher in jerky dried after tumbled and held for 24 hr. Sensory characteristics were higher in jerky treated with protease, not affected by holding time after marinated.

• Food Science of Animal Resources
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• v.35 no.4
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• pp.449-458
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• 2015

The effects of quality grade and storage time on physicochemical, sensory properties and microbial population of Hanwoo striploin beef were investigated. After a total of 30 Hanwoo beef were slaughtered, the cold carcasses were graded by official meat grader at 24 h postmortem. The carcasses were categorized into five groups (quality grade 1++, 1+, 1, 2, and 3) and were vacuum-packaged and stored. The samples were kept for 1, 4, 6, 8, 11, 13, 15, 18, 20, 22 and 25 d for analyses. As the quality grade was increased, moisture, protein and ash contents decreased (p<0.05). Higher quality grade corresponded with higher fat contents. The shear force values decreased with increasing quality grade and showed decreases sharply during the first 4 d (p<0.05). pH, water holding capacity, cooking loss, and volatile basic nitrogen for grade 1++ groups were lower than for grade 3 (p<0.05). CIE L* and b* values increased as increased quality grade (p<0.05). Meat color decreased until 13 d and fluctuated after 15 d of storage (p<0.05). Regarding the sensory scores, higher quality grade corresponded with higher juiciness, tenderness, flavor, fatty and palatability scores (p<0.05). Generally, increased storage time for 15 d improved sensory scores attributes. Results indicate that a high quality grade could positively influence physicochemical and sensory properties.

• Korean Journal of Animal Reproduction
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• v.19 no.3
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• pp.181-189
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• 1995

In this study, methods on fabrication of microtool and setting of micromanipulator were examined and relationship between first polar body extrusion rate and maturation time of follicular oocyte, enulceation rae and repetition of trial, and enucleation rate and maturation period were investigated. The results are as follows: 1. Suitable outside diameter of micropipette tube was 1mm. Holding pipette with less than diameter of oocyte was fitred for manipulation, and zona dissection needle was easily operated when its sharp-point had diameter of about 8 ${\mu}{\textrm}{m}$ and length of 300${\mu}{\textrm}{m}$. The injection pipette with 20~35${\mu}{\textrm}{m}$ outside diameter was adequate for injection of blastomere into perivitelline space. 2. Separation of blastomere was effective when zona pellucida had cut with zonadissection needle and the embryo was pipetted gently with the pipette that had narrower diameter than that of embryo until separation of blastomeres had completed. 3. The extrusion rate of first polar body was 78% during 20~24% hours incubation for maturation. 4. According to repetitions of micromanipulation, the enucleation rate was increased to 85% and the time required for enucleation of a oocyte was shortened to 3 min. 5. The extrusion rate of first polar body and enucleation rate were 82 and 76% respectively, in the group of the oocytes cultured for 22 hours. However in the group cultured for 24 hours, the extrusion rate of first polar body and enucleation rate were 53 and 100% respectively.

• Knowledge Management Research
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• v.14 no.1
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• pp.39-55
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• 2013

As the importance of intellectual property rights for the 21st century challenge became prominent, many companies have been trying to secure many rights competitively. In particular, application numbers of patent that represents technology has been increased continuously. Korean companies were not exception; mainly in large companies, there have been continued the efforts to grow the number of patent applications in quantitative volume. But the issues that how viable patents the companies have, how effectively the companies manage, and how economically usable the patents are, are totally different from quantitative management level. As such, the issue is connected to how to assess the patent management level of companies. On the other side of quantitative growth of patent that companies hold, there are some problems such as the difficulties to determine if the patents hold substantial values, and the difficulties to determine whether the patent are managed effectively. In addition, as the numbers of patent application and registration of companies are increased, the cost for patent holding and managing increase. It is required to pay continuous attention to the cost of patent management because patent registration fee has a property that increases rapidly with time and burden for patentee become heavier. As a result of analysis and interpretation, we confirmed that quantitative management, particularly the number of patent applicant does not make positive impact on how to use patent after application. Rather, it is observed that the economical usage is influenced positively by the efforts of patent applicants such as considering for the time of patent examination, paying attention to receive patent registration decision. Therefore, this study shows that efforts patent applicants provide in management level after application time are important to maintain the value of patents.

• Journal of Advanced Navigation Technology
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• v.21 no.6
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• pp.651-658
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• 2017

There were many studies on the development of radiation measuring instruments to detect the presence of radiation. In particular, the signal processing method and treatment without loss of the detection signal are very important. The common feature for these studies is the peak-hold method that keeps the peak value of input signal uniform for a short time, readouts its value, discharges electrical value, and then waits for next signal. We propose the new methodology to capture the pulse peak value from the radiation detector and read the value directly other than peak-hold method. This method has merit of accurate reading the input signal pulse peak value without complicate process of holding for a period or initializing of input signal, and then be verified to be adequate through simulation of actual example.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.28 no.5A
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• pp.294-304
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• 2003

For an efficient software download in cellular CDMA systems, session admission control based on area (SACA) is presented. In the SACA scheme, the base station only allows mobile terminal to start session when the mobile locates near the base station of a cell. A mobile that is located near cell center can request software download session, but the mobile that is far away from the center can request session only after arriving near the cell center. Session duration time follows exponential and Pareto distribution. Performance is analyzed in terms of handoff rate, mean channel holding time, session blocking probability and handoff forced termination probability. As analysis results, handoff rate between cells in the proposed scheme is reduced to 30 ~ 250 % compared to conventional scheme, according to traffic characteristics such as terminal speed, session duration time and the size of the allowable zone area in a cell for the start of the session. And new session blocking probability slightly decreases to 5 ~ 20 %, but handoff session forced termination probability drastically decreases to 35 ~ 220 %.

• Journal of Korea Water Resources Association
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• v.42 no.10
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• pp.809-824
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• 2009

Hydrological system forecasting, which is the short term runoff historical data during the limited period in dam site, is a conditional precedent of hydrological persistence by stochastic analysis. We have forecasted the monthly hydrological system from Andong dam basin data that is the rainfall, evaporation, and runoff, using the seasonal ARIMA (autoregressive integrated moving average) model. Also we have conducted long term runoff simulations through the forecasted results of TANK model and ARIMA+TANK model. The results of analysis have been concurred to the observation data, and it has been considered for application to possibility on the stochastic model for dam inflow forecasting. Thus, the method presented in this study suggests a help to water resource mid- and long-term strategy establishment to application for runoff simulations through the forecasting variables of hydrological time series on the relatively short holding runoff data in an object basins.

• Journal of the Korean Ceramic Society
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• v.54 no.4
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• pp.285-291
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• 2017

This study investigated the effects of grain size and phase constitution on the mechanical properties of $3Y-ZrO_2$ by varying the sintering conditions. The raw powder prepared by a low-cost wet milling using the coarse solid oxide powders was sintered by both pressureless sintering and hot-pressing, respectively. As increasing holding time at $1450^{\circ}C$ for pressureless sintering, it promoted the microstructural coarsening of matrix grains and the phase transformation to tetragonal phase, whereas the bimodal microstructure embedded with abnormal $cubic-ZrO_2$ grains was observed regardless of sintering time. On the other hand, the specimens hot-pressed at $1300^{\circ}C$ for 2 h reached ~ 97% of relative density with homogeneous fine microstructure and mixed phase constitution. It was found that the proportion of untransformed monoclinic zirconia had the most adverse effect on the biaxial strength compared to the impacts of grain size and density. The pressureless sintering of the low-cost powder for prolonged sintering time to 8 h led to a decent combination of mechanical properties ($H_V=13.2GPa$, $K_{IC}=8.16MPa{\cdot}m^{1/2}$, ${\sigma}=981MPa$).

• Journal of Korean Academy of Nursing
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• v.30 no.1
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• pp.225-239
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• 2000

This study is a research of conceptual development to find the factors of presence. The concept and the definition of presence received from literary review. On the basis of these findings, we formulate the contents of presence through structured interview guide composed of open-ended questionnaire which included the frequency, attitude, and posture. We selected 104 samples who are the patients, doctors, nurses, and other health providers. And then the contents of presence were established after integrating the formulated contents and putting them in order. The categorizing of the presence was made after discussing with specialist in this field. By using the selected contents, we made 25 statements of presence which were categorized into three factors. The results were as follows: 1. The definition of presence is being with at the same time and space, making attention with openness, and the therapeutic interaction with empathy. 2. The contents of presence through personal interviews are The time required is 5 minutes(46.15%), 2-3 minutes(34.61%), and 10 minutes (15.38%) respectively. The frequency of visiting is 3 times(39.20%), every time(23.07%), and more than 5 times(20.19%) respectively. \circled2 In case of being with nurse is having pain(39.42%), suffering trouble or severe fear(9.61%), feeling discomfort(8.65%), taking care of wound(7.69%), and other unfavorable symptoms(6.73%) respectively. \circled3 The posture being with nurse is depends on the situations(63.46%), sitting(26.92%), and standing(9.61%) respectively. Eye contact with nurse is face to face(78.84%), depends on the situations(20.19%), and not face to face(0.96%) respectively. \circled4 The attitudes of comfort are explaining about disease(23.07%), holding on hands (14.42%), touching on the suffering parts (11.53%), and unconditionally being with(7.69%) respectively. \circled5 Nurses' caring actions are kindness (27.88%), replying to the question (12.50%), smiling(10.57%), bright appearances (8.65%), and right and quick treatment(8.65%) respectively. \circled6 The effects of being with are peaceful mind(58.65%), quick recovery(13.46%), and decrease in fear(12.50%) respectively. \circled7 The attitudes of being with are listening (11.53%), recognition(8.65%), talking about discomfort(8.65%), and answering kindly (7.69%) respectively. 3. From the analysis of presence factors, 25 statements and 3 categorized factors are presented.

• Journal of Broadcast Engineering
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• v.7 no.1
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• pp.2-9
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• 2002

Recently. VR( Virtual Reality) applications such as virtual studio and virtual character are wifely used In TV programs. and AR( Augmented Reality) applications are also belong taken an interest increasingly. This paper introduces a virtual screen system. which Is a new AR application for broadcasting. The virtual screen system is a real-time video augmentation system by tracking a chroma-patterned moving panel. We haute recently developed a virtual screen system.'K-vision'. Our system enables the user to hold and morse a simple panel on which live video, pictures of 3D graphics images can appear. All the Images seen on the panel change In the correct perspective, according to movements of the camera and the user holding the panel, in real-time. For the purpose of tracking janet. we use some computer vision techniques such as blob analysis and feature tracking. K-vision can work well with any type of camera. requiring no special add-ons. And no need for sensor attachments to the panel. no calibration procedures required. We are using K-vision in some TV programs such as election. documentary and entertainment.