• 한국IT서비스학회지
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• 제18권3호
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• pp.129-141
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• 2019

Currently, there is a wave of second startup companies in Korea as well as within the global market, and the role of accelerators have become highly important at the center of changes. In the early 2000s, Y-Combinator has made Airbnb and Dropbox grow into a global company, and its start-up support model has begun to gain worldwide attention, and further became the beginning of the "accelerator" industry. The accelerator industry has been expanding rapidly throughout the United States, Britain and Israel, as well as China and Southeast Asia in recent years. As of the end of 2018, more than 130 accelerators have been operating in Korea, starting with Primer in 2010, and the scope of its activities has been expanding into specialty fields such as Pintech, bio industry, and Block chain, as well as Game. The purpose of this study is to study the role of the accelerator through the phenomenon of these accelerators and their step-by-step support services.

• 벤처혁신연구
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• 제5권1호
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• pp.1-18
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• 2022

열정이 기업가정신의 중요한 부분이며 창업가, 종업원 및 스타트업의 의도와 행동, 성과에 영향을 미친다는 경험적 증거가 늘어나고 있다. 열정은 스타트업을 시작하는 창업가가 극복해야 하는 노력과 도전을 고려할 때 기업가적 맥락에서 특히 중요하다. 본 연구는 액셀러레이터 보육 프로그램에 참여하는 스타트업 창업가 열정, 액셀러레이터 창업가와 매니저 열정이 보육 스타트업의 창업성과에 미치는 영향을 확인하고자 했다. 또한 창업 자기효능감이 이 영향 관계에서 매개 역할을 하는지 확인하고자 했다. 설문조사는 액셀러레이터 보육 프로그램을 마친 스타트업 창업가로 온라인 방식으로 실시하였다. 분석에 활용된 설문자는 총 330명이었다. 실증 분석결과 스타트업 창업가 열정, 액셀러레이터 창업가와 매니저 열정은 모두 보육 스타트업의 창업성과에 정(+)의 영향을 미치는 것이 확인되었다. 열정의 영향력은 스타트업 창업가> 액셀러레이터 창업가> 액셀러레이터 매니저 순으로 높게 나타났다. 창업 자기효능감은 스타트업 창업가 열정 및 액셀러레이터 창업가 열정과 보육 스타트업의 창업성과 간에 각각 매개 역할을 하는 것이 확인되었다. 하지만 액셀러레이터 매니저 열정과 보육 스타트업의 창업성과 간에는 유의한 매개 역할이 확인되지 않았다. 본 연구는 액셀러레이터 창업가와 매니저의 열정이 보육 스타트업의 창업성과에 긍정적인 영향을 미친다는 사실을 실증적으로 처음으로 확인한 데 의의가 있다. 액셀러레이터 창업가와 매니저의 열정은 보육 스타트업의 창업성과를 창출하는 데 감춰진 핵심(lynchpin) 요인일 만큼 중요한 역할을 하고 있다. 특히 액셀러레이터 창업가 열정은 보육 스타타업 창업성과에 미치는 영향력이 크므로 스타트업이 액셀러레이터를 선택할 때 이 사실을 인지하고 이들의 열정 평판을 주의 깊게 살펴볼 필요가 있다.

• 무역학회지
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• 제47권1호
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• pp.79-97
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• 2022

This study aims to analyze the effects of the characteristics of startups and the role of accelerators on internationalization performance. To achieve this purpose, we collected data from the management of 180 startups promoting overseas expansion. As a result of empirical analysis, it was confirmed that among the characteristics of startups, innovativeness, learning orientation, and global orientation had a significant effect on internationalization performance. In addition, it was confirmed that the role of the accelerator has a positive effect on the internationalization performance.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2014년도 제46회 동계 정기학술대회 초록집
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• pp.253.2-253.2
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• 2014

Micro hollow cathode discharges (MHCDs) are high-pressure, non-equilibrium discharges. Those MHCDs are useful to produce an excimer radiation. A major advantage of excimer sources is their high internal efficiency which may reach values up to 40% when operated under optimum conditions. To produce strong excimer radiation, the optimisation of the discharge conditions however needs a detailed knowledge of the properties of the discharge plasma itself. The electron density and temperature influence the excitation as well as plasma chemistry reactions and the gas temperature plays a major role as a significant energy loss process limiting efficiency of excimer radiation. Most of the recent spectroscopic investigations are focusing on the ultraviolet or vacuum ultraviolet range for direct detection of the excimer. In our experiments we have concentrated on investigating the micro hollow cathodes from the near UV to the near infrared (300~850 nm) to measure the basic plasma parameters using standard plasma diagnostic techniques such as stark broadening for electron density and the relative line intensity method for electron temperature. Finally, the neutral gas temperature was measured by means of the vibrational rotational structures of the second positive system of nitrogen.

• Journal of Astronomy and Space Sciences
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• 제40권4호
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• pp.259-266
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• 2023

The Standard Model (SM) does not provide an information for 26% of dark matter of the universe. In the dark sector, dark matter is supposed to be linked with the hypothetical particles called dark photons that have similar role to photons in electromagnetic interaction in the SM. Besides astronomical observation, there are studies to find dark matter candidates using accelerators. In this paper, we searched for dark photons using future electron-positron colliders, including Circular Electron Positron Collider (CEPC)/CEPC, Future Circular Collider (FCC-ee)/Innovative Detector for Electron-positron Accelerator (IDEA), and International Linear Collider (ILC)/International Large Detector (ILD). Using the parameterized response of the detector simulation of Delphes, we studied the sensitivity of a double dark photon mode at each accelerator/detector. The signal mode is double dark photon decay channel, e⁺e^- → A'A', where A' (dark photon with spin 1) decaying into a muon pair. We used MadGraph5 to generate Monte Carlo (MC) events by means of a Simplified Model. We found the dark photon mass at which the cross-sections were the highest for each accelerator to obtain the maximum number of events. In this paper we show the expected number of dark photon signal events and the detector efficiency of each accelerator. The results of this study can facilitate in the dark photon search by future electron-positron accelerators.

• Corrosion Science and Technology
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• 제6권4호
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• pp.154-158
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• 2007

For the application of flexible printed circuit board (FPCB), electroplated copper is required to have low surface roughness and residual stress. In the paper, the effects of surface roughness and residual stress of electroplated copper as thick as $8{\mu}m$ were studied on organic additives such as inhibitor, leveler and accelerator. Polyimide film coated with sputtered copper was used as a substrate. Surface roughness and surface morphology were measured by 3D-laser surface analysis and FESEM, respectively. Residual stress was calculated by Stoney's equation after measuring radius curvature of specimen. The addition of additives except high concentration of accelerator in the electrolyte decreased surface roughness of electroplated copper film. Such a tendency was explained by the function of additives among which the inhibitor and the leveler inhibit electroplating on a whole surface and prolusions, respectively. The accelerator plays a role in accelerating the electroplating in valley parts. The inhibitors and the leveler increased residual stress, whereas the accelerator decreased it. It was thought to be related with entrapped additives on electroplated copper film rather than the preferred orientation of electroplated copper film. The reason why additives lead to residual stress remains for the future work.

• KDI Journal of Economic Policy
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• 제40권2호
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• pp.75-96
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• 2018

Recently, the government has been pursuing various policies to create new industries and jobs through the invigoration of start-ups. For the sustained growth of start-ups, it is necessary to look not only at the supply of risk capital but also at policies for venture capital firms that nurture and foster start-ups. The purpose of this study is to estimate the effects of the nurturing and fostering role of risk capital, such as mentorship on the performance of start-ups, and to do this we analyzed the effects, as a newly introduced form of venture capital, of mentoring by an accelerator and investor ties on the performance outcomes of start-ups. We find that mentoring and investor ties for start-up enterprises positively influence follow-up investment in start-ups. In addition, this study finds that with a younger CEO of a start-up, it is more likely that the performance of the start-up will improve. Meanwhile, when examining increases in employment as a measure of the business performance of start-ups, mentoring and investor ties are found to have a positive effect on the increase of employment at start-ups. These results suggest that there is a need to promote policies that strengthen the mentoring role of venture capital in Korea's equity finance policies and in the government's SME support policies.

• 한국진공학회지
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• 제7권s1호
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• pp.183-189
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• 1998

A new computer simulation method for film growth, the kinetic Monte Carlo simulation in combination with the results obtained from molecular dynamics simulation for the transient process induced by deposited atoms, was developed. The behavior of energetic atom in Au/Au(100) thin film deposition was investigated by the method. The atomistic mechanism of energetic atom deposition that led to the smoothness enhancement and the relationship between the role of transient process and film growth mechanism were discussed. We found that energetic atoms cannot affect the film growth mode in layer-by-layer at high temperature. However, at temperature of film growth in 3-dimensional mode and in quasi-two-dimensional mode, energetic atoms can enhance the smoothness of film surface. The enhancement of smoothness is caused by the transient mobility of energetic atoms and the suppression for the formation of 3-dimensional islands.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2016년도 제50회 동계 정기학술대회 초록집
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• pp.151.1-151.1
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• 2016

Complex oxide heterointerfaces have been extensively explored in the past due to the novel phenomenon emerging at such interfaces that differ from their individual bulk counterparts. The integration of a ferromagnetic (FM) material with the superconducting (SC) material leading to proximity effect is one of the commonly studied phenomenon in these heterostructures. In continuation, we have stabilized the FM layer La0.7Ca0.3MnO3 (LCMO) on SC material YBa2Cu3O7-${\delta}$ (YBCO) using pulsed laser deposition technique and explored the structural, magnetic, electrical and magneto-transport properties of this heterostructure. ${\Phi}$-scan measurements confirm the epitaxial nature of LCMO/YBCO heterostructure grown on single crystalline SrTiO3 substrate. The FM transition of LCMO and SC transition of YBCO are observed in the magnetization measurements of the bilayer structure. Through electrical measurements, we understood that the proximity effect leads to lowering of the SC transition of YBCO. The role of interface in the bilayer structure is also realized through electrical transport measurements.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 C
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• pp.1550-1551
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• 2006

An L-band linear accelerator system for e-beam sterilization is under design for bio-technology application. The klystron-modulator system as RF microwave source has an important role as major components to offer the system reliability for long time steady state operation. A PFN line type pulse generator with a peak power of 71.5-MW, $7{\mu}s$, 285 pps is required to drive a high-power klystron. The high power pulse transformer has a function of transferring pulse energy from a pulsed power source to a high power load. The pulse transformer producing a pulse with a peak voltage of 275 kV is required to produce 30-MW peak and 60 kW average RF output power at the frequency of 1.3-GHz. We have designed the high power pulse transformer with 1:13 step-up ratio. The peak and average power capability is 71.5-MW (275 kV, 260 A at load side with $7{\mu}s$ pulse width) and 130 kW, respectively. In this paper, we present a system overview and initial design results of the high power pulse transformer.