• Proceedings of the Korea Concrete Institute Conference
• /
• 2004.11a
• /
• pp.33-36
• /
• 2004

The current Korea bridge design specifications have no provisions about concrete Barrier. And there are no test results of registence strength of the concrete barrier at the vehicle collision sites. This paper reports experimental results of concrete barrier on bridge deck conctructed by standard drawing of SB5 grade. Eight specimens were tested under static test. The specimens are divided by two groups (D-series and B-series). D-series is to show failure pattern of bridge deck. B-series is to show failure pattern of concrete Barrier. The test results compared with calculation results using Yield-Line theory of AASHTO LRFD Bridge Design Specifications.

• Journal of Electrical Engineering and Technology
• /
• v.7 no.2
• /
• pp.221-224
• /
• 2012

We propose a Readout Integrated Circuit (ROIC), which applies a fixed current bias sensing method to the input stage in order to simplify the circuit structure and the infrared sensor characteristic control. For the sample-and-hold stage to display and control a signal detected by the infrared sensor using a two-dimensional (2D) focal plane array, a differential delta sampling (DDS) circuit is proposed, which effectively removes the FPN. In addition, the output characteristic is improved to have wider bandwidth and higher gain by applying a two-stage variable gain amplifier (VGA). The output characteristic of the proposed device was 23.91 mV/$^{\circ}C$, and the linearity error rate was less than 0.22%. After checking the performance of the ROIC using HSPICE simulation, the chip was manufactured and measured using the SMIC 0.35 um standard CMOS process to confirm that the simulation results from the actual design are in good agreement with the measurement results.

• The KIPS Transactions:PartC
• /
• v.14C no.7
• /
• pp.545-552
• /
• 2007

P3P(Platform for Privacy Preference) that is used in the World Wide Web is a standard to define and negotiate policies about definition, transmission, collection, and maintenance of personal information. Current P3P standard provides methods that define client personal information protection policy and P3P policy associated with web server. It also provides a method that compares these two policies. The current P3P standard, however, does not handle detail functions for safe transmission of the personal information and data. Also, it does not handle problems that can be induced by the detail functions. In this paper, in order to solve these problems, we propose a Secure P3P(S-P3P) protocol, which is a security protocol for the current P3P standard, offers mutual authentication between the web server and the client, and guarantees integrity and confidentiality of the messages and data. Furthermore, a S-P3P protocol provides non-repudiation on transmission and reception of personal information that is transmitted from the client to the web server.

• Journal of the Institute of Electronics Engineers of Korea CI
• /
• v.45 no.5
• /
• pp.201-208
• /
• 2008

An active RFID system has the advantages of a long identification distance and a good identification rate as well as overcoming the passive RFID's drawback such as the lowering of identification rate on metal materials. So, the development of an active RFID system has been gradually increasing in harbor logistics and the national defense area. On the other hand, some identification failures between products developed under the same standards have been reported, and there are difficulties in evaluating the interoperability between developed Products and standard conformance test because an accurate evaluation method and equipment has not been established at the international level. Motivated by these, this study presents a realization of the hardware and software of emulator to evaluate the standard conformance of an active RFID system, Performance of the designed system are then analyzed by means of simulations of Matlab/Simulink, and the applicability of the emulator is verified by evaluating the standard conformance of a real active RFID tag.

• Journal of Korean language education
• /
• v.29 no.1
• /
• pp.25-52
• /
• 2018

This study purposed to discuss and suggest how to apply the internationally circulated standard Korean language curriculum to the fields of education. For this purpose, principles of the curriculum development that use reference of criterions like setting the education goals and stages of the Korean as second foreign language at the Korean foreign secondary school with the cases were reviewed. Studies about the curriculums of Korean language as an unit of state were began at 2010 and being continued in 2017. These researches pointed out a standard of the Korean language education, which influenced the development of curriculums, evaluations, and textbooks. Korean language teachers need lots of informations how to adjust the curriculums because they recognize that the curriculum as a reference of criteria is very difficult to be utilized. Roles of the reference of criteria that were extracted from the review on the curriculum development of the Korean as a second foreign language are providing a content basis for setting the goals of the curriculum and setting the stages connected with the operation of semesters. After the macroscopic development, plans for the phase of a syllabus run along. At this stage, sources of the items of education should be offered and elaboration of the education contents may design the syllabus. Finally, through a series of process, programs for Korean language education and textbook will be completed. Through this whole process, standard curriculum provides orientation and guidelines for the process of the development.

• Journal of the Korea Institute of Building Construction
• /
• v.1 no.2
• /
• pp.146-153
• /
• 2001

Radical development has been made in the every field of our society for the past scores of year. Radical development of industry and lining environment has mass-produced various toxic wastes . Which comes to the fore as a serious environmental problem. The purpose of this is to suggest the optima mix design by studying the utility of a toxic waste, plated sludge as a building material and deciding the standards of quality and use of cement and evaluating the properties of mortar and concrete in which plated sludge mixed. From an experiment, compressive strength required high early strength cement or special cement. Watertightness proved to be excellent. Heavy metals, such as Cd, Pb, Cu came out below an environmental standard. Cr+6 exceeded an environmental standard under a steam curing, but came out below an environmental under a standard curing. The higher replacement rate was, the lower frost, fusion and resistance were. Thus, got better results above the goal by condition. It was possible that plated sludge was replaced and solidified to aggregate. Therefore, it is necessary to define the standards of quality on strength, replacement rate of wastes, water permeability, endurance in other to solidify plated sludge to concrete products.

• Journal of the Institute of Electronics Engineers of Korea SD
• /
• v.48 no.11
• /
• pp.41-47
• /
• 2011

A novel digital instrumentation amplifier(DIA) converting universal signal inputs into 5V voltage-output for industry standard sensor signal processing was designed. The circuit consists of a commercial instrumentation amplifier, seven analog switches, two voltage references of 1.0V and -10.0V, and four resistors. The converting principle is the circuit reconstruction by switches for resistor values and reference voltages according to input signals. The simulation result shows that the DIA has a good output voltage characteristics of 0~5V for the input voltage of 0V~5V, 1V~5V, -10V~+10V, and 4mA~20mA. The nonlinearity error was less than 0.1% for the four type signal inputs.

• Korean Journal of Human Ecology
• /
• v.16 no.1
• /
• pp.173-181
• /
• 2007

This is a tentative study to provide prototype of sizing system for children's shoes. For this study, 364 elementary school girls from KyungIn and YeongNam areas were participated in the measurement. The results of the analysis on four measurement items related to foot can be summarized as followings: 1. All of the foot related items were increased according to their growth. Especially, foot length, foot width, and toe width showed a high correlation. 2. The result also revealed that the current sizing system can cover only 70.9% of children in measurement, which means that a new sizing system is required. 3. We suggested a new standard size for foot size/foot circumference based on the results above according to current sizing system, and a new standard size for foot circumference/foot width based on ISO standard. The results of this study would be helpful in the design of sizing system of children's shoe if applied with the raw data of the Size Korea recently measured.

• Journal of the Korean Wood Science and Technology
• /
• v.45 no.6
• /
• pp.846-856
• /
• 2017

The aim of this study was to develop the details of cross-laminated timber (CLT) envelops for satisfying the design standard for energy saving (DSEA) and passive standard in South Korea. When the same thickness of 180 mm concrete or CLT was used and the same materials for other layers were used for the roof, wall, and interlayer floor, the required insulation thickness for the different building envelopes in central, southern, and Jeju island was evaluated. As a result, compared to the concrete envelop, about 43 mm of insulation thickness was reduced for wall and roof with the CLT envelope. When the CLT envelopes were modified to protect the CLT from moisture based on FPInnovations (2011), the insulation thickness was further reduced by 12 mm. When the modified CLT building envelops satisfied with a passive standard are used for 10-story building, the required insulation was decreased by $40.89m^3$ for a floor ($105.27m^2{\times}2.3m$ in height) compared to concrete building. As the number of floors increases, about 3.58 m3 of insulation per floor was additionally saved.

• Journal of the Institute of Electronics Engineers of Korea TC
• /
• v.46 no.3
• /
• pp.26-31
• /
• 2009

In this paper, we propose the receiver algorithms suitable for the ECMA standard proposed for multi-gigabit packet transmission in 60 GHz band. In the ECMA standard, various modulation schemes are used for system flexibility. Hence, it is crucial to develop receiver algorithms supporting various modulation schemes with an uniform hardware structure. In this paper, we propose the receiver algorithms supporting DBPSK, DQPSK and OOK modulation schemes simultaneously. The proposed algorithms are not only hardware efficient but also support various modulation schemes with an uniform hardware structure.