• Journal of Digital Convergence
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• v.17 no.12
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• pp.139-145
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• 2019

The purpose of this study is to analyze the effects of black consumer behavior on turnover intentions. Baron and kenny (1986) The effectiveness of the analysis results, according to the verification procedure. Results of empirical analysis are as follow. black-consumer behavior has the significant positive effect on the intention of turnover of employee in restaurant. and The significance of this study indicates that service employee's psychological contract violation plays a role as mediated variable influencing the relationship between black-consumer behavior and intention of turnover. Based on the results of the empirical analysis, it was suggested that measures such as a policy banning access to black consumers or compensation system such as emotional labor allowance were needed to reduce the degree of turnover of the members of the organization. Finally, the methodological limitations of this study are presented.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.58 no.2
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• pp.327-331
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• 2009

Nano-porous $TiO_2$ powder was fabricated using Acetylene black, applied photo voltaic device based on the Dye-sensitized Solar Cells (DSCs) was investigated experimentally. $TiO_2$-powder was fabricated using Ti-isopropoxide and 2-propanol by sol-gel combustion method. For cases of variable Acetylene black, characteristic of porosity, size of particle and crystallite of obtained $TiO_2$ nano-powder was investigated. The photovoltaic efficiency of the prepared DSCs was measured using $TiO_2$ film which prepared on each different heat treatment temperature($400^{\circ}C{\sim}700^{\circ}C$) with paste of $TiO_2$ powder. The porosity and size of particle of $TiO_2$ powder made with Acetylene black 0.4g was influenced significantly effect to DSCs characteristic. Heat treatment at $500^{\circ}C$ makes the better photovoltaic efficiency which 5.02%($J_{sc}=11.79mA/cm^2$, $V_{oc}=0.73V$, ff=0.58). The sol-gel combustion method was useful to DSCs fabrication.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.58 no.2
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• pp.322-326
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• 2009

In this work, nanoporous $TiO_2$ powder was fabricated using Ketjen black, and applied in photovoltaic device based on the Dye-sensitized Solar Cells (DSCs). $TiO_2$ powder was fabricated using Ti-isopropoxide and 2-propanol by sol-gel combustion method. For added $0{\sim}2g$ variable of Ketjen black, characteristic of porosity, size of particle and crystallite of obtained $TiO_2$ nano powder was investigated. The photovoltaic efficiency of the prepared DSCs was measured using $TiO_2$ film which prepared on each different heat treatment temperature($100^{\circ}C{\sim}600^{\circ}C$) with paste of $TiO_2$ powder. The porosity and size in particle of $TiO_2$ powder made with Ketjen black Ig was influenced significantly effect to DSCs characteristic. Heat treatment at $500^{\circ}C$ makes the better photovoltaic efficiency which around 6.11%($J_{sc}=13.35mA/cm^2$, $V_{oc}=0.73V$, ff=0.63). The sol-gel combustion method was useful to DSCs fabrication.

• Food Science and Preservation
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• v.30 no.6
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• pp.905-917
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• 2023

The optimal fermentation conditions for producing fermented black soybeans rich in sulfur-containing amino acids were investigated. Response surface methodology monitored fermentation conditions. A central composite design examined the effect of independent variables: enzyme concentration (X₁) and fermentation time (X₂) on yield and methionine content. Both factors significantly influenced these dependent variables. Enzyme concentration more profoundly affected amino nitrogen content than fermentation time. β-Glucan content and cystine level were primarily affected by fermentation time. We elicited each variable's regression formula and identified optimal fermentation conditions for functional compounds. The predicted optimum conditions were an enzyme concentration of 0.28-0.32% and a fermentation time of 58.0-62.0 min. Under these optimal conditions, each black soybean variety's sulfur amino acid content ranged from 818.62 to 922.62 mg/100 g, demonstrating significant variety differences.

• Journal of the Korean Society of Food Science and Nutrition
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• v.35 no.4
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• pp.499-506
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• 2006

Response surface methodology was used to investigate the cookie manufacturing process with black rice flour. A three- variable, three-level central composite design was employed where the independent variables were the amount of black rice flour ($0{\sim}20%$), baking time ($10{\sim}14 min$), and sugar type (sucrose, aspartame and oligosaccarides). pHs of dough and cookie tended to increase with the addition of black rice flour. Moisture content of dough slightly increased with tile addition of black rice flour but nearly affected by baking time. Spread factor increased with the addition of black rice flour and it was more evident in the samples prepared with sucrose. L*-value decreased but a*-value increased significantly with the addition of black rice flour. Generally the amount of black rice flour in the sample did not affect the textural characteristics of cookie. As the amount of black rice and baking time increased, sensory flavor became stronger. Sensory sweetness as well as hardness increased but sensory color became darker with the addition of black rice flour. In addition, the response surface models developed in this study for most of physicochemical and sensory characteristics of black rice cookie were adequate.

• Fisheries and Aquatic Sciences
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• v.13 no.2
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• pp.182-189
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• 2010

An active stimulating device (ASD) using a rope apparatus may operated by the flow of turbulence inside a cod end, generating variable stimuli in addition to flow-related effects to minimize the by-catch of juvenile fishes. Preliminary testing involved a hydrodynamic effect inside the cod end with a rotating rope kite or conical rope array to generate variable stimuli (visual stimuli, water flow, or physical contact with fish) to change fish position. The experimental rope kite offered more choice in rotating period and range of sweeping action; adjusting the towing line or flow velocity helped to drive fish toward the net panel and encouraged escape. The conical shape of the rope array in the cod end helped to clear a path for fish by disturbing the rigging and providing more contrast between objects, preventing an optomotor response. This enabled more black porgy to be herded toward the net at an early stage of towing. Therefore, either a conical rope array or a rotating rope kite can be used as an effective ASD to prevent juvenile by-catch.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10b
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• pp.505-507
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• 1998

상속은 객체 지향 원리에서 만의 특성으로 추상화 레벨을 높여주고, 소프트웨어의 재사용을 강력히 지원하며, 대체 원리를 따른다. 또한 유지 보수의 용이성, 신뢰성등의 잇점을 제공한다. 그러나 측정 결과에 따르면 상속 계층이 깊어질수록 재사용이 어렵다고 조사되었으며 이는 재사용뿐아니라 개발에 있어서도 장애의 요인이 된다. 상속의 깊이를 최소화하기 위해서는 우선 상속 계층에서 직접적, 또는 간접적으로 사용되는 instance variable과 method만을 제외하고는 모두 삭제되어야 한다. 그러나, 다형성이 적용된 클래스는 정적(static) 분석이 불가능하므로 다형성을 제거하되, 다형성이 적용되었을 때와 동일한 모든 state, 기능 및 동작이 유지된 상태에서 처리되어야 한다. 다형성이 제거될 때 구현의 세부 사항은 변경하지 않음으로써 black box의 이점을 살린다. 다중상속의 경우는 각각의 상속 경로에 대하여 동일한 처리를 반복 수행하여 결과를 얻을 수 있으며, instance variable과 method의 access 레벨에 따라 처리 방법이 조금씩 달라진다. 본 논문에서는 C++에서의 다형성과 불필요한 instance variable과 method의 제거알고리즘에 대하여 논한다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2005.11a
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• pp.134-135
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• 2005

To improve mean-life and reliability of power cable, we have investigated volume resistivity and thermal conductivity showed by changing the content of acetylene black which is the component parts of semiconductive shield in underground power transmission cable. The sheets were primarily kneaded in their pellet form material samples for 5 minutes on rollers ranging between 70[$^{\circ}C$] and 100[$^{\circ}C$]. Then they were produced as sheets after pressing for 20 minutes at 180[$^{\circ}C$] with a pressure of 200[kg/cm]. The content of conductive acetylene black was the variable, and their contents were 20, 30 and 40[wt%], respectively. Volume resistivity of specimens was measured by volume resistivity meter after 10 minutes in the preheated oven of both $25\pm1[^{\circ}C]$ and $90\pm1[^{\circ}C]$. Thermal conductivity was measured by Nano Flash Diffusivity. The measurement temperatures of thermal conductivity using Nano Flash Diffusivity were both 25[$^{\circ}C$] and 55[$^{\circ}C$]. From these experimental results, volume resistivity was high according to an increase of the content of acetylene black. And thermal conductivity was increased to an increase of the content of acetylene black. And thermal conductivity were increased by heating rate because volume of materials was expanded according to rise in temperature.

• Korean Journal of Human Ecology
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• v.9 no.4
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• pp.459-469
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• 2000

The purpose of this study is to investigate the Myokmok, a kind of shroud. This study classifies Myokmok by its size, shape, cloths and color. Korean Myokmok through literatures are as follows. The size of Myokmok was one Ch'ok(尺) two Ch'on(寸). The surface of Myokmok were mostly black and the lining was mostly red. The cloths of Myokmok were Paek(帛) and Chu(紬). Myokmok through relics was various in size and the cloths were Kongdan(貢緞), Myongchu(明紬) and the color was various. Actual conditions of current Myokmok were various. The size, shape and cloths were more variable than the literatures and relics. In the Chinese Myokmok through literatures, the size were one Ch'ok two Ch'on, one Ch'ok and one Ch'ok five Ch'on. The cloths of Myokmok were Paek and Kyon(絹). The surface of Myokmok were mostly black and the lining was mostly red. Myokmok in Munkonggaryoieuichul was tide by the strings of four corners. The size of the Chinese Myokmok was various. The shape of the current Myokmok was various than the literatures and relics.

• Journal of The Korean Astronomical Society
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• v.35 no.3
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• pp.123-130
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• 2002

An elliptical accretion disk may be formed by tidally disrupted debris of a flying-by star in an active galactic nucleus (AGN) or by tidal perturbation due to a companion in a binary black hole system. We investigate the iron K$\alpha$ line profiles expecting from a geometrically thin, relativistic, elliptical disk in terms of model parameters, and find that a broad and skewed line profile can be reproduced well. Its shape is variable to the model parameters, such as, the emissivity power-law index, the ellipticity of the disk, and the major axis orientation of the elliptical accretion disk. We suggest that our results may be useful to search for such an elliptical disk and consequently the tidal disruption event.