• Journal of Sensor Science and Technology
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• v.27 no.1
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• pp.64-67
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• 2018

A new CMOS neuron circuit for implementing bistable synapses with spike-timing-dependent plasticity (STDP) properties has been proposed. In neuromorphic systems using STDP properties, the short-term dynamics of the synaptic efficacies are governed by the relative timing of the pre- and post-synaptic spikes, and the efficacies tend asymptotically to either a potentiated state or to a depressed one on long time scales. The proposed circuit consists of a negative shifter, a current starved inverter and a schmitt trigger designed using 0.18um CMOS technology. The simulation result shows that the proposed circuit can reduce the total size of neurons, and the spike energy of the proposed circuit is much less compared to the conventional circuits.

• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2006.09b
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• pp.844-845
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• 2006

For microelectronic circuits, the main type of failure is thermal fatigue. Therefore, the search for matched coefficients of thermal expansion (CTE) of packaging materials in combination with a high thermal conductivity is the main task for developments of heat sink materials electronics, and good mechanical properties are also required. The aim of this work is to develop copper matrix composites reinforced with carbon nanofibers to meet these requirements. In this paper, a technology for obtaining a homogeneous mixture of copper and nanofibers will be presented and the microstructure and properties of consolidated samples will be discussed.

• Journal of the Korea Safety Management & Science
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• v.8 no.2
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• pp.103-114
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• 2006

Today the usage of DB already becomes an important issue for many companies' survival. Especially, the companies which have adopted CRM could not gain the return to be expected because of the lack of understanding about the relationship with customers. Professor Schmitt introduced 'the complete CEM(Customer Experience Management) model', but no specific methodology for analysis was introduced. Therefore, in this study we use HOQ, GA, and ANP to build 'the complete CEM model' and present the integrated CEM model based on the integrated analytic process to help the company's decision about the stage to be begun first out of 5 stages of CEM and the priorities of investment in customer experiences.

• Journal of the Korean Institute of Telematics and Electronics B
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• v.33B no.10
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• pp.20-37
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• 1996

A current-controlled OTA-R schemitt trigger circuit is described. It consists of two OTA's and two resistors. The output level of the circuit is determined by one OTA and one resistor, and the threshold level by the other OtA and resistor. The theory of operation is presented and computer simulation results and experimental results using CMOS arrays are used to verify theoretical predictions. The results show close agreement between predicted behaviour and experimental performance.

• Proceedings of the KIEE Conference
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• 2007.10a
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• pp.389-390
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• 2007

배터리 기반 시스템(휴대폰, PDA, 노트북)에서 현재 배터리에 대한 정확한 잔량 표시는 중요하다. 사용자입장에서 언제 배터리를 충전시켜야 하는지 알아야 하기 때문이다. 그런데 지금까지의 배터리 잔량 측정 장치를 보게 되면, 배터리의 전압만을 측정[1]하여 잔량을 표시하는 방식으로서 여기에는 여러 가지 문제점이 있다. 가장 중요한 문제점으로는 순간적인 배터리 전압강하에 따른 실 시간적이고 정확한 보상체계가 갖춰져 있지 않다는 점이다. 물론 하드웨어적으로 Schmitt Trigger라는 회로[2]를 구성하여 이를 방지해 놓고 있기는 하지만 Hysteresis margin[3]을 벗어난 값에 대해서는 보상을 해주지 않는다. 이런 보상은 보통 소프트웨어적으로 각 이밴트별 룩업 테이블을 만들어서 compensation하고 있기는 하지만, 수많은 이벤트에 대한 보상 값들과 예상치 못한 동작상의 오류를 막을 수는 없다. 따라서 이에 대한 근본적인 대안으로서 본 논문에서는 load current를 측정하여 그에 따른 전압강하를 계산하고 실시간적으로 배터리 전압에 보상을 해줌으로서 보다 정확한 배터리 잔량 표시를 구현하고자 한다.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.7 no.4
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• pp.195-199
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• 2014

A bridge resistance deviation-to-period (BRD-to-P) converter is presented for interfacing resistive biosensors. It consists of a linear operational transconductance amplifier (OTA) and a current-controlled oscillator (CCO) formed by a current-tunable Schmitt trigger and an integrator. The free running period of the converter is 1.824 ms when the bridge offset resistance is $1k{\Omega}$. The conversion sensitivity of the converter amounts to $3.814ms/{\Omega}$ over the resistance deviation range of $0-1.2{\Omega}$. The linearity error of the conversion characteristic is less than ${\pm}0.004%$.

• Journal of Communication Design
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• v.55
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• pp.240-249
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• 2016

This study focused on cases about user experience using digital media as a marketing. The recent convergence of various types of media is resulting in new types of content. In a situation where approaching consumers through digital and virtual means is no longer an alternative or an option but a necessity, customers must be influenced and stimulated using various types of digital media. Because modern consumers prefer to participate actively rather than to be passively exposed to information, there is a need to maximize and optimize the consumer's experience using digital media. In this research, consumer experiences that utilized digital media were examined, and these case studies were analyzed from an experiential marketing perspective. How the 5 different types of Experiential Marketing proposed by Bernd Schmitt and Digital medias were combined in the digital marketing campaigns was examined. The case studies analyzed in this research were chosen out of widely popular digital marketing campaigns ran by beauty brands that used various experimental marketing types, such as 'Make-up Genius' of L'Or?al, 'Google Glass Tutorials' of Yves Saint Laurent and 'Digital Runway Bar' of The Burberry Beauty Box. This study classified that case samples into paid media, earned media and owned media based on sense, feel, think, act and relate that are the strategic experiential modules of Bernd Schmitt. This study could be confirmed various customer experience as a sense, feel, think, act and relate through that cases using digital media technology and marketing element of digital media. Through the process of examining which digital media types each marketing campaign utilized and how these types of digital marketing were combined, this research is significant in that it helps for the understanding of the current state of digital marketing and in that it can serve as the foundation for future research of efficient digital marketing.

• Journal of Venture Innovation
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• v.2 no.2
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• pp.79-94
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• 2019

The purpose of this study is to explore the factors affecting rural experience by applying the unified push-pull-mooring model. The theoretical model is an unified PPM model that introduces new variables based on PPM. The pull factor of the newly introduced variables were reconstructed based on the Schmitt's Experience model and ServQual model. The hypothesis is set as follows. The push factor will have a negative effect on experience satisfaction and the pull factor(experience attributes, service quality)will have a positive effect on experience satisfaction. Also, mooring factors will have a negative effect on experience satisfaction. The research model of this study was tested by structural equation model based on 314 effective questionnaire data. Service quality had a positive effect on experience satisfaction. Mooring factors have a negative effect on experience satisfaction. Push factor and experience attributes factor were analyzed to have a no significance effect on experience satisfaction. These results theoretically test that the mooring factors also have an important effect on the experience satisfaction in the rural experience. Based on the Schmitt's Experience model and ServQual model introduced as a pull factor, the proposed unified PPM model proved to be a useful analysis framework. In practice, it was able to provide implications on what factors should be strategically and marketingly focused to activate the 6th industry experience.

• Journal of Digital Convergence
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• v.15 no.6
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• pp.121-132
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• 2017

In this study, there is a purpose of research to secure competitiveness through the effective utilization of intangible corporate resources of founded enterprises. For this research, we conducted a survey on the way the customers who used the products of the BI center and founders less than 7 years evaluated the founded company. Schmitt's empirical element was examined as a theoretical background, and it was examined whether these empirical factors and attitudes acted as a preprocess in the decision-making process as a repurchase intention. The Result of research is as follows. First, It clearly indicated that customer experience and search experience affected the degree of re-purchase. Second, customer's experience (use experience, search experience, contact experience) were grasped with significant influence on customer's attitude. Third, we discovered that customer's attitude had mediated between customer's experience (use experience, search experience) and re-purchase. This research suggests that if we manage empirical factors well, we can increase the degree of re-purchase and cope appropriately with the limitations of small and medium enterprises.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.19 no.7
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• pp.771-777
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• 2008

In this paper, a frequency doubler using modified time-delay technique is proposed. A voltage controlled delay line (VCDL) in the proposed frequency doubler compensates the group delay time mismatching between input and delayed signal. With the group delay time matching and waveform shaping using the adjustable Schmitt triggers, the unwanted fundamental component($f_0$) and the higher order harmonics such as third and fourth are diminished excellently. In result, only the doubled frequency component($2f_0$) appears dominantly at the output port. The frequency doubler is designed at 1.15 GHz of $f_0$ and fabricated with TSMC $0.18\;{\mu}m$ CMOS process. The measured output power at $2f_0$ is 2.67 dBm when the input power is 0 dBm. The obtained suppression ratio of $f_0,\;3f_0$, and $4f_0$ to $2f_0$ are 43.65, 38.65 and 35.59 dB, respectively.