• Title/Summary/Keyword: anticipating

Search Result 169, Processing Time 0.023 seconds

The Resilient Characteristics of Typical Subgrade Soils in Korea (우리나라 대표적 노상토의 회복탄성 특성)

  • 조천환;우제윤
    • Geotechnical Engineering
    • /
    • v.7 no.1
    • /
    • pp.15-32
    • /
    • 1991
  • Recently, the rational methods of pavement design and analysis using the resilient modulus, MR, as fundamental input material property have been increasingly adopted in major advanced countries. Since the development of 1986 AASHTO Guide for Design of Pavement Structures, many researches concerning the resilient characteristics of various pavement materials as well . as development of reliable testing methods have been actively performed. Anticipating the use of Mn-based pavement design and analysis such as resilient characteristics and Mn - CBR relat - ionship of domestic subgrade soils were performed including development of a standard MR test procedure suitable for subgrade soils in our country.

  • PDF

Machining Characteristics of Ti-6Al-4V Titainum Alloy (Ti-6Al-4V 타이타늄 합금의 선삭특성)

  • 홍우표;김형철;이동주
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 2000.11a
    • /
    • pp.818-822
    • /
    • 2000
  • The low density, sustained high temperature strength and excellent resistivity to acid materials have made them strong candidate materials for future aerospace or medical applications. Nowadays their usage has already been broaden to everyday's commercial applications such as golf club heads, finger rings and many decorative items, Anticipating the general use of this material and development of the titanium alloys in domestic furnaces, the review and the study of the machining parameters for those alloys are deemed necessary. The present studies are concentrated to the machining parameters of the Ti-6Al-4V alloys due to their dominant position in the production of titanium alloys.

  • PDF

Strength Durability on Spur and Helical Gears in the Gearbox of Machine Tool (공작기계 기어박스에서의 스퍼기어와 헬리컬기어에 대한 강도 내구성)

  • Han, Moonsik;Cho, Jaeung
    • Journal of the Korean Society of Manufacturing Process Engineers
    • /
    • v.13 no.3
    • /
    • pp.103-110
    • /
    • 2014
  • In this study, spur and helical box models of an existing machine tool are investigated using structural and fatigue analyses. As the helical box model is shown to have less stress and deformation than those characteristics of the spur box model, the helical box has more strength and more transmission efficiency on the structure. In terms of fatigue analysis, the helical box model has more repeated fatigue strength than that of the spur box model. These study results can be effectively utilized in the design of real gear boxes of machine tools by anticipating and investigating prevention and durability against damage.

Review on The Proposed Offshore Wind Farm Projects Using National Wind Atlas and National Geographic Information (국가바람지도 및 국가지리정보에 의한 국내 해상풍력단지 개발계획의 비교분석)

  • Kim, Hyun-Goo;Hwang, Hyo-Jung
    • Journal of the Korean Solar Energy Society
    • /
    • v.30 no.5
    • /
    • pp.44-55
    • /
    • 2010
  • The proposed offshore wind farm projects, i.e., Mooudo offshore, Yeonggwang-Gochang offshore, Saemangeum offshore, Imjado offshore and Gadeokdo-Dadeapo offshore, were compared and analyzed using the Korea National Wind Mapand Wind Farm Suitability Assessment System developed by the Korea Institute of Energy Research. The suitability of the proposed areas was comprehensively assessed using geographic, economic constraints, wave condition and wind resource factors, but the focus of this paper was on the geographic constraints and wave conditions. Imjado had several geographical constraints, despite having a good wind power density, while Saemangeum had a relatively low wave height, shallow water depth, close substation and slow tidal current. It is anticipating that the present comparison and analysis could be used as reference guidelines when selecting and preparing the design of large-scale offshore wind farm in the near future.

Development of Tension Bracing for Energy Dissipation Capacity (에너지 소산 능력을 가진 인장가새 개발)

  • 최형준;엄승현;김원기
    • Proceedings of the Earthquake Engineering Society of Korea Conference
    • /
    • 2002.09a
    • /
    • pp.349-356
    • /
    • 2002
  • Anticipating potential strong earthquakes, bracing dampers for better seismic performance are being developed in Korea, while similar ones are already developed in other countries. But, there are lack of relevant research on Slender Brace Dampers rather than hysteretic dampers, whose concept is also inappropriate for rehabilitation existed slender braced frame. For the development of Slender Brace Damper in slender braced frame, this research investigates Slender Brace Damper possessing various shapes of hyteretic damper through performing experimental test under cyclic loadings. As a result at this paper, Energy dissipation of test specimens (H35B20PS, H35B20TS, H20B60PS) are superior.

  • PDF

Electrophysiologic Examination and Physiotherapy for Facial Nerve Palsy (안면신경 마비의 전기생리학적 검사 및 물리치료)

  • Ryoo, Jae-Kwan;Kim, Jong-Soon
    • Journal of Korean Physical Therapy Science
    • /
    • v.4 no.3
    • /
    • pp.499-509
    • /
    • 1997
  • The facial nerve have a long pathway. Thus facial nerve fibers easily involved at any point along their course will lead to a facial palsy of lower motor neuron type and upper motor neuron type. The electrophysiologic examination can evaluate and anticipating that prognosis of facial nerve palsy. The electrophysiologic examination are Nerve Excitability Test(NET), Elecctroneurography(ENG), Electro-myography(EMG), Blink Reflex, and Electrogustometry et.al. The NET is very useful method for assessment of prognosis and distinguish between nerve degeneration and physiological block as early as 72 hour after onset of the facial palsy. And other examination also give objectively information of facial nerve for prognosis and treatment. Treatment goal of physiotherapy are prevent contracture and disuse atrophy of facial muscle with muscle reeducation and strengthening and maintain symmetry facial motion. The treatment better start as early as possible.

  • PDF

A Strategic Effect of Bundling on Product Distribution

  • Gwon, Jae-Hyun
    • Journal of Distribution Science
    • /
    • v.13 no.10
    • /
    • pp.15-21
    • /
    • 2015
  • Purpose - This study examines a bundling effect on production and distribution in a patent-protected industry. Despite the heavy use of bundling strategies in the information and technology industry, literature has paid scant attention to bundling of intellectual property rights. This study examines a theoretical exploration of the bundling effect on licensing behavior. Research design, data, and methodology - To address this behavior, we build a simplified model consisting of three stages: 1) bundling decision, 2) licensing agreement, and 3) competition. The subgame perfect Nash equilibrium is applied to the model. Results - A single-patent holder with superior technology grants its own license to the multiple-patent firm, thereby leaving the market. Anticipating the single right holder's licensing strategy, the multiple-patent firm offers a bundle, making the single-right holder's bargaining position weaker. Conclusions - Bundling is an effective business strategy, resulting in multiple products for a firm as it faces other firms with single-product lines in each market. Taking advantage of the multi-patent or multi-product lines, the firm utilizes the bundling strategy obtaining better technology from the standalone single-patent firms.

A Study on the Tool Wear and Cutting Characteristics in the Machining of Ti-6Al-4V using Tungsten Carbide Tool (초경공구를 사용한 Ti-6Al-4V 타이타늄 합금의 절삭가공시 공구마멸과 절삭특성에 관한 연구)

  • 김남용;홍우표;이동주
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
    • /
    • 2000.10a
    • /
    • pp.361-366
    • /
    • 2000
  • The machinability of Ti-6Al-4V titanium alloy and tool wear behavior when machining Ti-6Al-4V titanium alloy was studied to understand the machining characteristics. this material is one of the strong candidate materials present and future aerospace or medical applications. Nowadays their usage has already been broaden to everyday's commercial applications such as golf club heads, finger rings and many decorative items. Anticipating the general use of this material and development of the titanium alloys in domestic facilities, the review and the study of the machining parameters for those alloys are deemed necessary. this study is concentrated to the machining parameters of the Ti-6Al-4V alloy due to their dominant position in the production of titanium alloys.

  • PDF

Video-Assisted Thoracoscopic Thymectomy (흉강내시경을 이용한 흉선 절제술)

  • Jang, Taek-Hui;Baek, Hui-Jong
    • Journal of Chest Surgery
    • /
    • v.28 no.1
    • /
    • pp.78-80
    • /
    • 1995
  • We report the thoracoscopic resection of thymus and pericardial fat tissue in a patient who was in the setting of late severe myasthenia gravis[Osserman`s Group II-C-2 and previous tracheostomy state. The patient was 33-year-old female. She had been supported with mechanical ventilator for 88 days and suffered from recurrent pneumonia. Our first aim was to weaning her from mechanical ventilator. Traditional methods such as median sternotomy or transcervial thymectomy or transsternal sternotomy were difficult because of the anticipating complications of mediastinitis or morbidity, especially chest pain, following thoracotomy. We could wean her from the mechanical ventilator at postoperative 9 days. So, we concluded that video-assisted thoracoscopic thymectomy is a useful alternative tool in this case.

  • PDF

Durability Analysis on Fatigue of Caliper Cylinder (캘리퍼 실린더의 피로에 대한 내구성 해석)

  • Han, Moonsik;Cho, Jaeung
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.23 no.2
    • /
    • pp.208-213
    • /
    • 2015
  • In this study, two models due to the configuration of caliper cylinder among the parts of automotive brake system are studied by structural and fatigue analysis. As the maximum equivalent stress at model 2 becomes 1.5 times lower than model 1, model 2 can endure load higher than model 1. In case of fatigue damage analysis on model 1 and 2, model 1 has the damage area more than model 2. Fatigue damage at model 1 happen more than model 2. These study results can be effectively utilized with the design on caliper cylinder by anticipating prevention against its damage and investigating durability.