구형 투척 로봇의 전방향 충격흡수 구조 설계 및 동적 자세 안정화

정원석(Wonsuk Jung),김영근(Young-Keun Kim),김수현(Soohyun Kim) 제어로봇시스템학회 2016 제어·로봇·시스템학회 논문지 Vol.22 No.4

In this paper, we propose a novel compact surveillance throwing robot which has an omnidirectional shock absorption mechanism and an active control part of wheel treads to stabilize the dynamic posture of a miniature sphere type throwing robot. This throwing robot, which weighs 1.14kg and is 110mm in height, is designed in a spherical shape to be easily grabbed for throwing. Also, the omnidirectional shock absorbing aspect is designed using several leaf springs connected with inner and outer wheels. The wheel treads control part consists of a link mechanism. Through the field experiments, this robot is validated to withstand higher than 17Ns of omnidirectional impulse and increase the stabilized max speed three times from 11 rad/s to 33rad/s by increasing wheel treads.

보험설계사 보수구조가 불완전판매에 미친 영향

정원석 ( Wonsuk Chung ),이경희 ( Kyonghee Lee ) 한국금융연구원 2021 금융연구 Vol.35 No.2

본 논문에서는 보험설계사의 보수구조가 불완전판매에 미치는 영향을 생명보험 설계사의 보험상품 판매현황 데이터를 활용하여 분석하였다. 보험설계사는 보험료가 높을수록, 저축성보험보다는 보장성보험 판매 시 그리고 보험회사의 영업정책에 따른 보험료 환산율(초회보험료 대비 환산 초회보험료 비율)이 높을수록 높은 보수를 받는다. 분석 결과 보수 지급률이 높은 보장성보험의 판매비율이 높은 설계사에게서 불완전판매가 발생하는 경우가 많은 것으로 나타났다. 이러한 분석 결과는 정보경제학에서 이론적으로 예측한 전문가의 자기이익을 위한 편향된 정보전달 행위가 실제 보험판매에서 존재함을 보였다는 점에서 학술적 기여를 갖는다. 또한, 보험설계사의 불완전판매 감소를 위한 보수설계에서 고려해야 할 사항에 대한 기초자료를 제공한다는 점에서 정책적 의의를 가진다. Many communication(or Cheap Talk) game literature theoretically expected that experts could falsely recommend a product, called biased recommendation, to the decision-maker if the expert could get a higher payoff by selling the product than the others. If the decision-maker is aware of the biased incentive scheme of the expert he(or she) could discounts the recommendation and the communication is still possible. In the insurance market, insurance agents receive higher commissions when they sell protection-type insurance products than sell saving-type. So the agents have an incentive to the biased recommendation, such as laying, exaggerating of the benefits, to sell protect type insurance. From a financial supervisor’s perspective, those kinds of behaviors are considered misselling or incomplete sales. In this paper, we analyze the insurance agents’ sales behavior using the individual sales data, including the amount of sales commission and the number of misselling or incomplete sales, belonging to a large life insurance company. We set up a hypothesis that the agents have an incentive to falsely recommend the protection type insurance product which gives a higher commission rate to earn more payoffs. In the data, there are about 4,000 insurance agents in the company. Most of them do not have any or very few, 2 or less, misselling records. However, some agents do have more than ten misselling records. We analyze the causal relationship between the number of misselling and the sales of the portion of protection-type insurance which incentive scheme using the negative binomial regression analysis. If the coefficient of the portion in the estimation model is statistically significant which means, if other conditions are the same, the insurance agent is more likely to falsely recommend when he/she sells the insurance. Our empirical analysis results show that if the number of new sales contracts increases the number of misselling increases. the result also shows a statistically significant positive relationship between the portions of the sales of the protection-type product and the number of misselling. Our study shows that biased recommendation for the self-interest of experts, which is expected in the theoretical research, exists in the life insurance sales field. This paper provides evidence on a supervisory regulatory framework for the re-designing of insurance agents’ incentive schemes to reduce misselling incentives.

계사 생략이 포함된 스페인어 평서형 감탄문(declarative exclamatives)에 대한 통사적 분석

정원석 ( Jung Wonsuk ) 한국스페인어문학회(구 한국서어서문학회) 2018 스페인어문학 Vol.0 No.88

This paper discusses certain types of exclamatives in Spanish in which they appear in the shape of declarative and do not involve wh-phrase at the left-periphery of the sentence. Although this kind of exclamative has been described in the literature on Spanish exclamatives, it has not yet been discussed in detail. The aim of this paper is to examine some instances of declarative exclamatives to see whether they can be derived in the same way as typical wh-exclamatives. To this end, I describe first some properties of declarative exclamatives in Spanish with or without the presence of the copulative verb involved therein, and then I address some issues relevant to both the syntax of wh-exclamatives as well as ordinary wh-questions in Spanish. Finally, I also offer a twofold analysis of declarative exclamatives; depending on the ellipsis of the copulative verb, they can be derived either from “T-to-C” movement, similar to what happens in wh-exclamatives, or by way of subject raising to [Spec,CP] in order to satisfy the [Excl]-feature on C.

전치사의 목적어 생략이 불가한 이유에 대한 이론적 고찰

정원석 ( Jung Wonsuk ) 한국스페인어문학회(구 한국서어서문학회) 2020 스페인어문학 Vol.0 No.94

This paper discusses why the ellipsis of the complement of a Preposition(P) cannot be allowed in the general case. In principle this is unexpected if we consider that P is a functional category which is also eligible to be a licensing head of ellipsis, along with other functional categories such as T, C, and D, all of which can be the licensor of ellipsis in a variety of elliptical constructions. In this paper, I argue that the reason why a functional category P cannot allow ellipsis of its complement may be attributable to a PF-constraint; the so-called “Stranded Affix Filter(SAF)”(Lasnik 1981), in conjunction with the (a)tonicity of P(Gallego 2009, 2011). Concretely, I suggest that if P is atonic and thus cannot stand alone at PF, the complement of P cannot be elided due to the SAF imposed on P, whereas if P is tonic and can thus stand alone at PF, it is not subject to the SAF and thereby can be survived at PF after the deletion of its complement. To explore more of the possibility of ellipsis in the prepositional domain, I also discuss issues related to the ellipsis of PP as well as other instances where the complement of P is missing on the surface.

스페인어의 복합 시제구 생략(complex TP-ellipsis)에 관한 소고

정원석 ( Jung Wonsuk ) 한국스페인어문학회(구 한국서어서문학회) 2021 스페인어문학 Vol.- No.99

In Spanish, there are cases in which both the matrix TP and the embedded TP are elided all together, leaving apparently one remnant per clause. This paper examines how such kind of complex process of clausal ellipsis can be accounted for in a principled way, taking into consideration the existing analyses of TP-deletion. I argue that complex TP-ellipsis in Spanish is derived by deleting both the matrix TP and the embedded TP without moving the remnants of each TP. I claim that a deletion analysis assuming in-situ remnants is adequate to deal with complex TP-ellipsis and is also supported by the fact that heads like complementizer and negation (or the positive polarity marker si) cannot undergo the alleged movement of the remnant to the specifier of a functional phrase. I also discuss why non-null subject languages like English and French do not allow complex clausal ellipsis of both matrix TP and embedded TP, by claiming that the difference between Spanish and English/French may be attributable to the presence/absence of (some sort of) the so-called Comp-trace effects in the context of complex TP-ellipsis.

축방향 충격흡수 향상을 위한 소형구형 투척 로봇구조 설계

정원석(Wonsuk Jung),김영근(Young-Keun Kim),김수현(Soohyun Kim) 제어로봇시스템학회 2015 제어·로봇·시스템학회 논문지 Vol.21 No.4

In this paper, we propose a novel surveillance throwing robot which is compact, light-weight and has an efficient shock absorption mechanism. The throwing robot is designed in a spherical shape to be easily grabbed by a hand for throwing. Also, a motor-wheel linking mechanism is designed to be robustly protected from shocks upon landing. The proposed robot has a weight of 2.2kg and the diameter of its wheels is 150 mm. Through the field experiments, the designed robot is validated to withstand higher than 13Ns of impulse.

연금저축 세제혜택 세액공제 전환에 따른 연금저축 납입행태 변화 분석

정원석 ( Wonsuk Chung ) 보험연구원 2018 보험금융연구 Vol.29 No.3

정부는 고소득층의 세제혜택을 조정하고, 저소득층의 연금저축 납입유인을 강화하기 위해 소득공제를 적용하던 연금저축 납입액에 대한 세제혜택 방식을 2014년부터 세액공제로 전환하였다. 세액공제로 전환이 연금저축 가입자들의 연금저축 가입과 납입액에 미친 영향을 2012년부터 2016년까지 조사된 재정패널조사를 이용하여 분석하였다. 연구 결과 세액공제 도입이 저소득층 연금저축 가입 및 납입액을 감소시킨 것으로 나타났다. 이는 세액공제가 연금자산 형성이 꼭 필요한 저소득 계층에 연금저축 납입유인을 감소시킨 것을 의미하며, 이들 계층에 특화된 사적연금가입유인 제공이 필요함을 의미한다. 본 논문은 세제혜택 방식 변화에 따른 연금저축납입행태 변화를 규명하고 이에 관련된 정책적 시사점을 도출한 것에 그 학술적·정책적 기여가 있다. To enhance pension saving incentive to lower income earners and adjust tax favor to higher income earners, the Korean government changes the tax treatment method for the private pension contributions from tax exemption to tax credit in 2014. To assess the policy effect empirically, we analyze the policy effect by income level using the National Survey of Tax and Benefit Survey data from 2012 to 2016. We find two important pension saving behavior after changing the tax treatment method from the analysis. First, on average, private pension subscription has a negative causal relationship with the tax treatment method. We find that changing tax treatment method decreases the probability of pension subscription rate by 0.57%. However, for the pension subscription, there is no statistically significant evidence that a certain income group differently reacted to the new tax treatment method. Secondly, for the amount of pension contribution, changing the tax credit method decreased the pension contributions and compare to the higher income earners, the lower income earners decrease the amount of pension contribution more. Therefore, we conclude that, ironically, the new policy reduces the most needed group's pension savings. We claim that to make lower income earners save more pension fund the government needs to provide more customized incentives scheme.

스페인어 하위비교급 구문에서의 도치와 공백화

정원석 ( Wonsuk Jung ) 한국외국어대학교 언어연구소 2021 언어와 언어학 Vol.- No.91

Spanish behaves differently from English in the context of comparative (sub-)deletion in which degree or quantity variable is elided, but the whole comparative sentence is interpreted as involving such variable. While English comparative (sub-)deletion does not have to employ any specific strategy for the well-formedness of the comparative sentence, the Spanish counterpart requires either inversion or gapping; otherwise, it is ungrammatical(Price 1990; Reglero 2007, 2013; Sáez & Sánchez-López 2013). In this paper I discuss some issues involved in comparative (sub-)deletion constructions in Spanish, in particular with reference to the inversion and gapping strategies involved therein. I show that previous works on Spanish comparative (sub-)deletion do not satisfactorily account for empirical data. I also examine whether the two strategies above can be applicable to both partitive comparatives as well as comparatives in the form of relative clauses.

저소득층 연금저축 납입액에 대한 세액공제율 추가적용 효과 분석

정원석 ( Wonsuk Chung ) 한국재정학회(구 한국재정공공경제학회) 2018 재정학연구 Vol.11 No.3

정부는 2015년부터 연소득 5,500만 원 이하자의 연금저축 납입액에 대한 세액공제율을 기존 12%에서 15%로 강화하여 적용하였다. 소득수준에 따른 세액공제율 차등적용이 해당 소득계층의 연금저축 납입액변화에 미친 영향을 「재정패널조사」를 활용하여 실증분석한 결과, 세액공제율 확대 적용이 세액공제 도입 이후 이어져온 저소득층의 연금저축 가입 및 납입액 감소세를 증가세로 바꾸지는 못한 것으로 분석되었다. 이는 세액공제율 확대 적용이 과세미달자가 많은 저소득계층에 연금저축 가입유인을 주지 못하기 때문으로 보인다. 저소득층의 사적연금 납입확대 및 노후소득원 확보 유도를 위한 지원책 마련을 고민할 필요가 있다. From 2015 Korean government provides an additional tax credit to private pension subscribers who are earning lower than 55 million Korean won a year. In this research. we empirically analyze the policy effect on private pension savings by income levels. We find that applying additional tax credit rate does not increase lower income earners’ pension saving behaviors. That implies that because, in many cases, lower income earners do not have tax liabilities even though the government provides a higher tax credit rate they do not have any incentive to increase private savings. We suggest that providing subsidy should enhance lower income earners’ private pension savings.

사적연금 세제혜택 한도 상향에 따른 사적연금 추가가입 유인추정

정원석 ( Wonsuk Chung ),강성호 ( Sung Ho Kang ) 한국재정학회(구 한국재정공공경제학회) 2017 재정학연구 Vol.10 No.1

연금계좌에 대한 과세 이연한도가 2015년부터 400만원에서 700만원으로 상향됨에 따라 퇴직연금가입자들의 IRP 등 사적연금에 대한 가입 유인이 강화되었다. 이러한 정책적 변화의 영향을 측정하기 위해 2011년 세제혜택 한도 상향에 따른 사적연금 납입 행태 변화를 패널데이터를 활용하여 실증적으로 분석한 결과 세제혜택 한도 상향은 중산층과 저소득층 연금저축 납입액증가에는 별다른 영향을 미치지 않은 반면, 고소득층 연금저축 납입액은 증가하는 방향으로 영향을 미친 것으로 나타났다. 특히, 2011년 연금저축 납입액 상향에 따른 연금저축 납입액 탄력성을 바탕으로 2015년부터 확대된 IRP 본인 기여금 납입액 변화를 예측한 결과, 2015년 세제혜택 상향으로 인해 사적연금 납입액은 고소득층의 경우 약 3%, 중산층은 약 1% 정도 증가 할 것으로 예상되었다. 본 연구는 연금저축 한도 상향에 대한 경제주체의 반응이 소득수준별로 다르다는 점을 규명하였으며 이를 바탕으로 유사한 정책이 시행될 경우 소득계층별 반응을 예측할 수 있는 기초자료를 제공한다는 점에서 학술적, 정책적 기여를 가진다. In this study, we estimate the effect of extending tax deferral limit for private pension from 4 million KRW to 7million KRW in 2015 by income level. To estimate the effect, first we empirically analyze the elasticity of pension contribution of changing tax deferral limit in 2011. In the analysis we find that high income group sensitively reacts to the tax deferral limit change and increases private pension contribution. On the contrary, mid and low income groups do not change their private pension contribution. Based on the empirical analysis we estimate that because of increasing tax deferral limit, high and mid income groups will increase private pension contribution about 3% and 1% for each. However, the change will not increase low income group private pension. This study shows that pension contribution elasticities of changing tax limit are different for income levels. This finding will be a valuable knowledge for social security policy design.