• Journal of the Korean Home Economics Association
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• v.38 no.8
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• pp.13-27
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• 2000

The background of single animal figures was originated from those northern mounted nomadic groups, which was Scythe style Culture. The art of the nomads working in the Scythian idiom was small in size and essentially decorative in intention, yet practically every object which can be associated with any unit in this group of people possesses many of the attributes essential to a real work of art. Clarity of conception, purity of form, co-ordination of rhythm and balance, and not least, an understanding and respect for the material employed were triumphantly blended by the Eurasian nomads to produce a distinctive style. In Scythian art the multitude of animal representations well illustrates the reoccupation of this nomadic people with animals in their environment. Usually only wild animals are represented. Commonly depicted are: stags and deer, lions or other large cats, eagles, birds heads (perhaps of ravens), griffins, snakes, hares, fish, goats, rams, boars, moose (elk), yak, sheep and bears. The occasional exception to the wild animal rule is domesticated horses-important because the Scythians were horse bleeders and their whole culture revolved around their dependence on the horse. The nomads had little reason to create object in honour of gods or men, but they had an instinct for beauty and the wish to surround themselves with the animal forms in which they had come to delight The Scytians tried to combine in a single rendering all the salient points of the animal they were delineating. They archived considerable success in the difficult task of showing in a single image the various and often incompatible poses assumed by a single animal in the course of its life. Zoomorphic motifs were used not simple for decorative effect, but to trim the object into amulets, with magical power to assist in hunting, and to protect the owner from harm.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.3
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• pp.605-614
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• 2012

Nowadays u-healthcare which is very sensitive to the character of user's information among other ubiquitous computing field is popular in medical field. u-healthcare deals extremely personal information including personal health/medical information so it is exposed to various weaknees and threats in the part of security and privacy. In this paper, RFID based patient's information protecting protocol that prevents to damage the information using his or her mobile unit illegally by others is proposed. The protocol separates the authority of hospital(doctor, nurse, pharmacy) to access to patient's information by level of access authority of hospital which is registered to management server and makes the hospital do the minimum task. Specially, the management server which plays the role of gateway makes access permission key periodically not to be accessed by others about unauthorized information except authorized information and improves patient's certification and management.

• Smart Media Journal
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• v.4 no.4
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• pp.56-63
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• 2015

Modern GPU can execute mass parallel computation by exploiting many GPU core. GPGPU architecture, which is one of approaches exploiting outstanding computational resources on GPU, executes general-purpose applications as well as graphics applications, effectively. In this paper, we investigate the impact of memory-efficiency and performance according to number of CTAs(Cooperative Thread Array) on a SM(Streaming Multiprocessors), since the analysis of relation between number of CTA on a SM and them provides inspiration for researchers who study the GPU to improve the performance. Our simulation results show that almost benchmarks increasing the number of CTAs on a SM improve the performance. On the other hand, some benchmarks cannot provide performance improvement. This is because the number of CTAs generated from same kernel is a little or the number of CTAs executed simultaneously is not enough. To precisely classify the analysis of performance according to number of CTA on a SM, we also analyze the relations between performance and memory stall, dram stall due to the interconnect congestion, pipeline stall at the memory stage. We expect that our analysis results help the study to improve the parallelism and memory-efficiency on GPGPU architecture.

• Korean System Dynamics Review
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• v.16 no.3
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• pp.5-29
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• 2015

The importance of the concept of safety culture has increased in the security of high-risk facility after Chernobyl accident in 1986. This paper elaborated the concept of safety culture and its main factors by Causal Loop Diagram. Due to the decline of safety culture, the occurrence of incidents and accidents require more and more corrective actions to the members of high-risk facilities and thereby increasing their workloads. Employees who must complete the task within the given time have to have time pressures and don't comply with the rules and procedures. Also, a schedule pressure is a big stress for employees, causing mistakes in precision work. In order to improve these problems, CLD of the safety culture in this paper suggests hiring more workers, re-allocation of given workloads and strengthen the learning, communication capabilities and safety leadership. In addition, the two real accident cases were analyzed to test the feasibility of the System Dynamic simulation model through the process of structuring the fault trees on the stationary black out accident in Kori unit 1 in South Korea and Kleen Energy power station explosion in US. The simulation results show that the various safety factors cause the serious accident combined with mechanical failure and safety culture will reduce the possibility of the accidents in these high-risk organizations. This simulation model can contribute to analyzing the impact of the organizational and human factors of safety culture and can provide the alternatives in high-risk facilities.

• Smart Structures and Systems
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• v.6 no.8
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• pp.939-951
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• 2010

A low-cost wireless sensor network (WSN) solution with highly expandable super and simple nodes was developed. The super node was designed as a sensing unit as well as a receiving terminal with low energy consumption. The simple node was designed to serve as a cheaper alternative for large-scale deployment. A 12-bit ADC inputs and DAC outputs were reserved for sensor boards to ease the sensing integration. Vibration and thermal field tests of the Chi-Lu Bridge were conducted to evaluate the WSN's performance. Integral acceleration, temperature and tilt sensing modules were constructed to simplify the task of long-term environmental monitoring on this bridge, while a star topology was used to avoid collisions and reduce power consumption. We showed that, given sufficient power and additional power amplifier, the WSN can successfully be active for more than 7 days and satisfy the half bridge 120-meter transmission requirement. The time and frequency responses of cables shocked by external force and temperature variations around cables in one day were recorded and analyzed. Finally, guidelines on power characterization of the WSN platform and selection of acceleration sensors for structural health monitoring applications were given.

• Journal of Dairy Science and Biotechnology
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• v.23 no.1
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• pp.9-17
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• 2005

Nanotechnology has penetrated into the various branches of research and development and it is particularly of benefit to the particle size engineering. It has been widely known that the particle size of an active pharmaceutical ingredient (API) is critical in determining the bioavailability and processability of pharmaceutical formulation. However, the window of appropriate particle size has been limited mainly due to related processing difficulties. The windows have been widened by the recent development of nanotechnologies, resulting in diversified drug delivery systems. The impact of this development is far more fundamental than what can be expected from conventional particle size engineering. It is the case that the preparation and use of nanoparticles will soon be a common task in the particle engineering step of pharmaceutical unit operations. In this chapter, the basic principles of variouspreparation techniques will be discussed in detail. Regardless of processing details, the preparation methods of pharmaceutical nanoparticles mainly concern how to deal with the extra energy related with particle size. Depending on the ways of treating the e103 energy, preparation methods can be classified into two major classes, i.e.. thermodynamic and kinetic approaches. The recent progresses have shown the possibilities of much more complex combinations of different approaches and the use of new types of energy and nanostructures.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.20 no.4
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• pp.87-92
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• 2020

Although GPGPU (General-Purpose GPU) can maximize performance by parallelizing a task with tens of thousands of threads, those threads are internally grouped into a thread block, which is a base unit for processing and resource allocation. A thread block scheduler is a specialized hardware gadget whose role is to allocate thread blocks to GPGPU processing hardware in a round-robin manner. However, round-robin is a sequential allocation policy and is not optimized for GPGPU resource utilization. In this paper, we propose a thread block scheduler model which can analyze and quantify performances for various thread block scheduling policies. Experiment results from the implemented simulator of our model show that the legacy hardware thread block scheduling does not behave well when workload becomes heavy.

• The KIPS Transactions:PartB
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• v.8B no.6
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• pp.699-704
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• 2001

ABSTRACT In this paper, a new hybrid modular recurrent TDNN (time-delay neural network)-HMM (hidden Markov model) architecture for speech recognition has been studied. In TDNN, the recognition rate could be increased if the signal window is extended. To obtain this effect in the neural network, a high-level memory generated through a feedback within the first hidden layer of the neural network unit has been used. To increase the ability to deal with the temporal structure of phonemic features, the input layer of the network has been divided into multiple states in time sequence and has feature detector for each states. To expand the network from small recognition task to the full speech recognition system, modular construction method has been also used. Furthermore, the neural network and HMM are integrated by feeding output vectors from the neural network to HMM, and a new parameter smoothing method which can be applied to this hybrid system has been suggested.

• Journal of the Ergonomics Society of Korea
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• v.33 no.1
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• pp.59-68
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• 2014

Objective: The aim of this study is to investigate the effect of BackJoy on how it effectively reduces the physical load generated in a posture in which the user sits, increases user's comfort and satisfaction, and maintains the correct posture. Background: Because of development of science and economic development, most office workers and students spend about 75% of their working time in chairs. However most of them have a poor posture. Method: This experiment conducted measurement using a pressure mat and surveyed to evaluate fatigue level, satisfaction and comfort of sit. The study is experimented 20 male and 14 female participants. The participants carried out four different types of tasks and each task took 20 minutes long. Results: In the case of experiment results before and after the use of BackJoy, average pressure, contact area and pressure per unit area appear to prove that using BackJoy is more effective. Conclusion: Through this study, the BackJoy's effects for the maintenance of good posture and loads that occur in the body are reduced. In the future study, there are some researches needed for various verifications using an EMG sensor that shows loads of vertebrae and we need to analyze each group of the participants by dividing them. Application: The evaluation method used in this study can be applied to evaluating ergonomic chairs.

• Journal of the Korea Safety Management & Science
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• v.5 no.3
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• pp.81-98
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• 2003

In modern society, there are diverse sorts of VIPs including a king and individuals. Some like a king or president are in need of professional secret services, and others become VIPs by being guarded by a bodyguard company at their own request. The former is called a public guard, and the latter is a private one. In the field of the public guard, the nation should be furnished with a guard system in consideration of political circumstances to protect VIPs. That is, the parliamentary cabinet system and presidential system call for a different guard system, and the guard system's professional features vary to some degree with political situations and cultural climate. If the ultimate goal of guard is to protect the chief of the democratic and open state in a most efficient and safe manner, it's mandatorily necessary to set up a professional and specialized guard organization to provide democratic and efficient secret services. It's desired that the domestic presidential guard division should be staffed with not only expert guards but other personnels dispatched from the military and police. In the police, guard mission is splitted among various guard and security agencies, including the National Police Agency's public security bureau or the Seoul Metropolitan Police Agency's public security division, 101 security unit, mobile police and 22 special guard division. As a chain of command is separated and it's difficult to manage such organizations effectively, the National Police Agency should be exclusively in charge of VIP guard and security. In the area of private guard, the private police system has shared national security task as a middle organization between the private police and private guard. But now its intent has gradually weakened, and its mission should be redefined. In addition, the way people look at private guard should change, and they should be well informed that it could serve to prevent possible crimes, protect them against crimes and get rid of their inconveniences. To make a good impression on people, the guard associations and businesses should put their efforts into reinforcing publicity activities, and the government, academic circles and press should team up with them as well.