Earticle

이 논문은 조선유교가족규범의 형성과 전개가 그저 단일하고 매끈하였던 것이 아니라, 굴절과 균열의 전개 과정을 내포하고 있었음을 밝힌다. 이러한 작업을 통해 유교가족규범이 단지 외부의 이질적인 것이 삽입되거나 규범에 순응하는 것으로서가 아니라, 유교전통 안에서 미끄러짐, 불복종이 일어나는 속에서 구성된 것임을 강조할 것이다. 또한 가족 문제를 단지 이념이나 제도에 의해서가 아니라 감정, 경험, 서사에 주목해서 연구함으로써 유교가족에대한 새로운 이해의 장을 열 수 있음을 보여준다. 이 같은 문제의식을 효과적으로 다루기 위해 논문에서는 다음과같은 논의의 층위를 구성한다. 하나는 조선 전기의 불교와 유교, 조선 후기의 유교와 천주교가 중첩되는 지점에서 일어나는 중층성을 드러내는 것이다. 이를 통해 유교와 비유교가 만나는 지점에서일어나는 가족규범의 다양한 층과 결이 발생했음을 살펴볼 것이다. 다른 하나는 전형적인 유교가족규범, 젠더규범 내부에서 일어나는 복종과 불복종, 공고화와 균열의 이중성을 주목할 것이다. 이러한 논의 안에서 매우 안정되어 보이는 유교가족규범과 젠더 규범의 내부가 사실은 불안정하고 불확정적이었음을 보여줄 것이다. 이렇게 조선시대 가족을 논의함으로써 조선유교를 단일한 개념으로 포획하는 관념을 해체하고 혼종적이고 다양하며 개방적이고복수적인 정체성을 드러낼 수 있다. 또한 조선유교 및 조선가족규범을 이해하는 시각의 다양화를 제시할 수 있다.

This thesis reveals that the formation and development of Chosun Confucian family norms were not just uniform and smooth, but involved the development process of consolidation and fissure. Through such work, the thesis will emphasize that Confucian family norms were not simply inserted from external factors or conformed to norms, but were formulated within Confucian tradition, where sliding and insubordination occur. In addition, the thesis will show a new chapter of understanding about Confucian family by focusing on emotion, experience, and narration, rather than ideology or institution. To effectively discuss such issues, the thesis will classify the layers of discussion as such. The first is revealing the stratification where Confucianism, Buddhism in the early Chosun-dynasty, and Confucianism, Catholicism in the late Chosun-dynasty overlap. Through this, the thesis will look at how the diverse layers of family norms were developed, particularly at the overlapping point where Confucianism and non-Confucianism meet. Another focus of the discussion is the duplicity of subordination and insubordination, consolidation and fissure that occur within traditional Confucian family norms and gender norms. In such discussions, the author seeks to reveal that the interior of Confucian family norms and gender norms, which seemed stable, were in fact unstable and uncertain. By discussing family in the Chosun-dynasty, the notion that limits Chosun Confucianism as one concept will be dissolved and instead can reveal Confucianism’s hybrid, diverse, open, and plural identity. Furthermore, the thesis can suggest diversification of perspective that understands Chosun Confucianism and Chosun family norms.

This study was performed to find out the measurement criteria of slip resistance from analysis of human gait and slips. Many kinds of slip resistance testers were developed based on mechanical friction testers. But, there are, as yet, no unambiguous slip resistance measurement methodologies and generally accepted safety criteria or safety thresholds for estimating slipping hazard exposures. Also, there are variety of measuring conditions between those testers. The measurement criteria should be tested within the range of human slipping conditions observed in biomechanical studies. It's results should clearly consider whether the devices reflect the human slipping conditions. In this study a dragsled type friction tester, which was constructed in accordance with ISO 15133 basically, was used. Test conditions were set in order to determine the range of measurement criteria. It is shown that drag velocity should be more than 1 m/s, acceleration be more than 10 $m/s^2$, contact time be less than 0.1sec, and contact pressure be within 350~400 kPa.

A transient finite element simulation is developed for the two-dimensional stationary elastoplastic layer between sliding layers, to investigate thermoelastoplastic instability(TEPI) due to frictional heating in the material. The analysis will show some differences between the case of thermoelastic instability and TEPI, especially according to the contact pressure above yield stress. A transient behavior of contact pressure is captured to explain the behavior of thermoplasticity of contact with different sliding velocity. The instability of contact pressure in the long range of braking time will be explored to understand the generation mechanism of hot spots.

PURPOSE: The purpose of this study was compare quadriceps femoris muscle activity while performing wall slide squats of four methods. METHODS: Forty subjects, with no history of patellofemoral pain, quadriceps injury, or other knee injury volunteered for this study. Muscle activation of the vastus medialis obliquus, rectus femoris, vastus lateralis muscles were recorded while subjects performed 10 consecutive wall slide squats. Subjects performed the wall slide squats during four different methods: (1) basic wall slide squat, (2) keep back upright against fitness ball, (3) standing of unstable surface, (4) squeezing ball between both knees. Statistical analysis were accomplished by utilizing the one-way ANOVA(Bonferroni's post-hoc test) by SPSS 20.0 program. Significance level was set at p<.05. RESULTS: Muscle activations induced wall slide squats of four methods compared and results showed that there was significant difference only in vastus medialis obliquus and rectus femoris but there was no significant difference in vastus lateralis. The vastus medialis obliquus was significantly different only keep back upright against fitness ball at post-hoc test. The rectus femoris was significantly different keep back upright against fitness ball and standing of unstable surface at post-hoc test. CONCLUSION: Based on these results, we conclude that quadriceps femoris muscle activations are differenced by performing wall slide squats of four different methods in healthy subjects. These data suggest that for quadriceps muscle strengthening, exercise professionals can perform the wall slide squats by altering several task variables. Further research is needed to determine the exact mechanism by which quadriceps function is altered.

An adaptive formation control approach is proposed for nonhonolomic multiple mobile robots considering unknown slipping and skidding. It is assumed that unknown slipping and skidding effects are bounded by unknown constants. Under this assumption, the adaptive technique is employed to estimate the bounds of unknown slipping and skidding effects of each mobile robot. To deal with the skidding effect included in kinematics, the dynamic surface design approach is applied to design a local controller for each mobile robot. Using Lyapunov stability theorem, the adaptation laws for tuning bounds of slipping and skidding are induced and it is proved that all signals of the closed-loop system are bounded and the tracking errors and the synchronization errors of the path parameters converge to an adjustable neighborhood of the origin. Finally, simulation results are provided to verify the effectiveness of the proposed approach.

In this paper, we present a finger tip tactile sensor which can detect contact normal force as well as slip. The sensor is made up of two different materials, such as polyvinylidene fluoride (PVDF) known as piezoelectric polymer, and pressure variable resistor ink. In order to detect slip on the surface of the object, two PVDF strips are arranged along the normal direction in the robot finger tip and the thumb tip. The surface electrode of the PVDF strip is fabricated using silk-screening technique with silver paste. Also a thin flexible force sensor is fabricated in the form of a matrix using pressure variable resistor ink in order to sense the static force. The developed tactile sensor is physically flexible and it can be deformed three-dimensionally to any shape so that it can be placed on anywhere on the curved surface. In addition, a tactile sensing system is developed, which includes miniaturized charge amplifier to amplify the small signal from the sensor, and the fast signal processing unit. The sensor system is evaluated experimentally and its effectiveness is validated.

A media-feeding (or media-transport) system is a key component in daily consumer systems such as printers, copiers and ATM's. The role of the media-transport system is to feed a medium, which is usually in the form of a thin film, to the main process in a uniform and repeatable manner. Even small slippage between the media and the feeding rollers could significantly degrade the performance of the entire system. The slippage between the medium and the feeding rollers is determined by many parameters which include the friction coefficient between the feeding rollers and the medium material, the angular velocity of the feeding rollers, and the normal force applied by feeding rollers on the medium. This paper investigates the effect of the normal force and the angular velocity of feeding rollers on the slippage of the medium. Authors have constructed a test bed for experiments, which consists of a feeding module and various measuring devices. Using regular paper as media being fed, the authors experimentally measured the slippage of the medium under various normal forces and angular velocities of driving feeding roller. Also the authors developed a novel two-dimensional simulation model for the media-transport system. The paper medium is modeled as a set of multiple rigid bodies interconnected by revolute joints and rotational springs and dampers. Simulations were executed using a multi-body dynamic analysis tool called RecurDy $n^{ⓡ}$. The slippage obtained by the simulation is compared to experimental results.ults.

The purpose of this study is to understand the sliding characteristics of the infilling-joint surface using the new devised shear test apparatus with changeable slope for the original infilling materials and the infilling materials experienced cyclic freezing-thawing processes. Three types of the mother rock classified as the igneous rock, the metamorphic rock and the sedimentary rock and the infilling materials were collected for laboratory test. The cohesion according to the slope change of the rock joint shows large variation within ${\pm}$5 degrees but the internal friction angle shows appears the linear decreasing tendency. It is confirmed that the affecting factor of slope change of rock joint at the behavior of rock mass is larger than that of the infilling thickness. Test results show that the cohesion and the internal friction angle in 100 times of cyclic freezing-thawing processes are decreased about 50 percent compared with original one. A further study using various infillings materials would lead to a better understanding of the failure mechanism of rock mass by slope change of rock joint.

Leaf type foil bearings have been used successfully in many aerospace applications such as air cycle machines, turbocompressors and turboexpander. These applications are characterized by light loads, constant speeds and low to moderate temperatures. But, as system on start-up or shutdown, sliding contact between the shaft and foil surfaces cause wear. So, in present study, to understand pressure-flow characteristics and deformation of foil bearing, flow/structure interaction analysis was used. and using this method, 2D and 3D calculation was peformed for shape of foil bearing to know circumferential direction flow and leakage flow characteristics of axial direction.

The purpose of this study were to evaluate the dynamic characteristics of the portable slipmeters with respect to actual slipping and to compare their output with those of force platform. The selected slipmeters were commonly used devices for slipperiness measurement in situ floors. Their output quantity represented force (BOT-3000), loss of energy(British pendulum striker) and angle of inclination(English XL). The validity of these devices was studied with respect to actual slipping using a force platform. The precision of these devices was also evaluated with force platform. Based on dynamics of human subject behavior when slipping during normal walking, the all devices tested in this study showed poor performances: low built up ratio, low normal pressure, and long contact time prior to slip. Nevertheless, their results reasonably correlated with those calculated from the ground reaction forces generated by the operation of the selected slipmeters on the force platform although the absolute values of COF from these three devices could be quite different. Also the results showed good repeatability under the some test conditions.

To simulate an actual slip to measure floor slipperiness, slip resistance testers simulate slip in only forward direction because forward slip in the landing phase was found to be the most important factor for loss of balance. Backward slip in the take off phase was possible but was excluded in the friction test protocol because it was not dangerous. However, backward slip was tested in the friction test protocol without any theoretical background of the significance in generating dangerous slips and falls and was proven to be as good as forward slip in measuring floor slipperiness. Therefore, this study was designed to investigate the significance of backward slip in generating dangerous slips and falls with different combinations of floor and shoe sole. The results showed different tendency of backward slip in take off phase being significant in generating dangerous slips and falls because backward slip in the takeoff phase affected gait pattern disturbances seriously. resulted in dangerous falls. Fast toe velocity increased the severity of backward slip and confirmed the significance of backward slip in generating dangerous slips and falls. As a result, this study recommends the utilization of backward slip in the measurement of floor slipperiness.

이양지의 ｢유희｣는, 지금껏 탈식민주의 비평과 디아스포라 비평을 통해 많은 연구가 이루어져 왔다. 그러나, ｢유희｣의 모든 서사를 독점하는 화자가 한국인 여성인 ‘나’라는 특이점은 선행연구의 사각에 놓여있었다. 이 글은, 화자인 ‘나’에 초점을 맞추어 ｢유희｣를 ｢나의 유희｣로서 독해한다. 이를 통해 가시화 되는 것은, 헤테로 섹시즘적 규범아래 ‘여성’이란 종속주체로서 있기 때문에 우울해 하던 ‘나’이며, 유희와의 만남을 통해 이것이 해소된 ‘나’이다. 이 글은 이런 ‘나’가 그려내는 형용할 수 없는 유희에 대한 감정들을 보이지 않는 욕망으로서 읽어내며, ｢유희｣ 가 ‘나’의 ‘벽장’이었을 가능성을 독해한다. 나아가, 이러한 ‘나’가 묘사하는 유희가 한일의 경계뿐만 아니라, 갖은 규범을 넘나드는 비규범적인 퀴어한 존재임을 확인한다. 이때 중요한 것은, 유희가 퀴어하다는 것이 아닌, 서사를 독점하는 화자인 ‘나’가 유희를 퀴어하게 바라보고 있다는 점이다. ‘나’는, 본국인으로서 유희를 규범화 하던 과거와는 달리, 규범에서 벗어나는 유희를 있는 그대로 바라본다. 유희를 규범화하던 과거의 ‘나’는 남성 젠더화되어 있었으며, 규범에 침투되고 규정되며 이에 수치심을 느끼는 유희는 여성 젠더화된 신체이다. 그러나, 유희가 떠나고 난 뒤 증여로서 남겨진 종이 다발과 ‘나’의 신체 안에 자리 잡은 ‘작은 응어리’를 통해, ‘나’의 신체는 변화한다. 이러한 변화는, 규범의 강요를 매개하지 않은 관계이기 때문에 가능했으며, 이는 유희와의 지극히 사적인 친밀함이 있었기에 가능했음을, 이 글은 확인하였다.

Lee Yang-ji’s Yuhi has been extensively studied in postcolonial and diaspora criticism. However, a unique aspect of Yuhi who’s narrator is a Korean woman referred to as “I” has been overlooked in previous studies. This paper focuses on the narrator “I,” and reads Yuhi as ““I”’s Yuhi.” What becomes visible through this reading is the narrator, “I,” who has been melancholic due to her being subject to heterosexist norms as a “woman,” and this melancholia is resolved through her encounter with Yuhi. This paper reads the inexpressible emotions that “I” portrays toward Yuhi as invisible desires and Yuhi as a metaphorical “closet”, in the Sedgiwickian sense, for “I.” Furthermore, it can be observed that the Yuhi was depicted by “I” as a non-normative queer that traverses not only the boundaries between Korea and Japan but also various norms. What is important here is not that Yuhi is queer, but that the narrator ‘I,’ who monopolizes the narrative, views Yuhi as queer. Unlike in the past, when “I,” as a native, tried to enforce Yuhi to conform to norms, “I” sees Yuhi as deviating from the norms. In the past, “I” who imposed norms on Yuhi was gendered as male, while Yuhi whose body was infiltrated and regulated by these norms, experienced shame in her female-gendered body. However, after Yuhi leaves, “the bundle of paper” left as a gift and the “small lump” that formed within “I”’s body, signify its transformation. This transformation is possible because their relationship was not mediated by the enforcement of norms, and it confirms that the deeply personal intimacy with Yuhi enabled this change.

본 연구에서는 다단계방법(multi-step method)을 사용하여, 지진시 지반과 지하구조물 경계가 가장 미끄러지기 쉬운 상태일 수 있는 지반 공진시에 대하여 지하구조물 축방향 동지반강성계수와 미끄러지기 쉬운 조건들을 구하였다. 상재하중에 의한 지반과 지하구조물 경계에서의 전단저항력과 지진시 발생되는 미끄러짐 부분의 전단력을 비교함으로써 미끄러짐 조건을 결정하였다. 그리고 매개변수 해석을 통하여 지하구조물의 크기와 위치, 지반조건, 표층지반의 형상 및 경계마찰계수에 대하여 미끄러지기 쉬운 조건을 구하였다.

By focusing on the resonant vibration mode of soil-underground structure system, this paper obtained dynamic soil stiffness and easy sliding conditions at the interface between soil and underground structure. Multi-step method is employed to isolate two primary causes of soil-structure interaction. Mohr-Coulomb criterion is used to determine the threshold level of the sliding. To find out the conditions the interface slides easily, parametric studies are performed about the factors governing sliding, which are the size and location of underground structures, ground condition, the configuration of surface deposit and interface friction coefficients.

The feasibility of using AE for detecting contact and slip between a workpiece and an end effector has been tested. Specifically, the relationship between the contact and slip motion and the characteristics of the AE signal is theoretically and experimentally investigated. The experimental results manifest that the high sensitivity of AE signal to the contact and slip makes it a good alternative as a robot tactile sensor.

The paper presents an effective analytical method for SSI systems which can have separation or sliding at the soil-structure interface. The method is based on a hybrid approach which combines a linear SSI code KIESSI-2D in frequency domain with a commercial finite element package ANSYS to obtain nonlinear dynamic responses in time domain. The method is applied to a 2-D underground box structure which experiences separation and sliding at the soil-structure interface. Material nonlinearity of the concrete structure is also included in the analysis. Effects of the interface conditions are examined and some critical factors affecting the seismic performance of underground structures are identified.

The room-temperature shapes of cured unsymmetric composite laminates have out-of-plane warping after autoclave processing. In addition, they exhibit two stable room-temperature configurations due to snap-through phenomena when the side length of laminates exceeds a critical value. The cured shapes of unsymmetric laminates are influenced by many environmental factors. Experiments show that the effect of too-plate cannot be ignored and has significant influence on the cured shape of unsymmetric laminates. In this present study, approximations to the strain fields are used in the expression for the total potential energy and the Rayleigh-Ritz method is applied. The slippage effects resulting from the interaction between the laminates and the tool-plate are considered. By introducing a dimensionless slippage coefficient and correlating the corresponding value with experimental results, the influence of processing parameters is investigated. Modeling is extended to predict curvatures of plate configurations with various aspect ratio.