• 제목/요약/키워드: local control

검색결과 3,862건 처리시간 0.032초

미국 소비자들의 로컬 푸드 구매에 대한 내재된 신념에 관한 연구 (Assessment of U.S. Consumers' Underlying Beliefs about Local Food Purchase)

  • 신연호;;정승은;김동진
    • 한국조리학회지
    • /
    • 제21권5호
    • /
    • pp.109-118
    • /
    • 2015
  • 본 연구의 목적은 Ajzen(1991)의 계획된 행동이론을 바탕으로 로컬 푸드를 구매와 관련한 기초적인 인지적 근거를 조사하는 것이다. 개방형 문항으로 이루어진 온라인 설문조사를 통해서 163명의 응답자로부터 자료를 수집하였으며, 수집된 로컬 푸드 구매와 관련한 소비자의 핵심적인 행동적 신념, 규범적 신념, 통제적 신념에 대한 자료를 분석하고 평가했다. 응답자들의 가장 핵심적인 행동적 신념은 지역경제 발전에 이바지함으로 나타났으며, 뒤를 이어 신선함, 식품의 원산지와 취급과정에 대한 지식, 환경혜택, 건강혜택으로 나타났다. 규범적 신념으로는 지역 사업가, 지역 농부, 가족, 지역민, 친구의 순으로 로컬 푸드 구매를 지지하는 것으로 나타났다. 반면, 로컬 푸드 구매와 관련한 장애물로는 불편한 로컬푸드 상점의 위치와 영업시간, 높은 가격, 상품의 제한성과 다양성, 구매처에 대한 제한된 지식등이 주로 거론되었다.

Adaptive Distributed Autonomous Robotic System based on Artificial Immune Network and Classifier System

  • Hwang, Chul-Min;Sim, Kwee-Bo
    • 제어로봇시스템학회:학술대회논문집
    • /
    • 제어로봇시스템학회 2004년도 ICCAS
    • /
    • pp.1286-1290
    • /
    • 2004
  • This paper proposes a Distributed Autonomous Robotic System (DARS) based on an Artificial Immune Network (AIN) and a Classifier System (CS). The behaviors of robots in the system are divided into global behaviors and local behaviors. The global behaviors are actions to search tasks in environment. These actions are composed of two types: aggregation and dispersion. AIN decides one between these two actions, which robot should select and act on in the global. The local behaviors are actions to execute searched tasks. The robots learn the cooperative actions in these behaviors by the CS in the local. The relation between global and local increases the performance of system. Also, the proposed system is more adaptive than the existing system at the viewpoint that the robots learn and adapt the changing of tasks.

  • PDF

Local bond-slip behavior of medium and high strength fiber reinforced concrete after exposure to high temperatures

  • Tang, Chao-Wei
    • Structural Engineering and Mechanics
    • /
    • 제66권4호
    • /
    • pp.477-485
    • /
    • 2018
  • This study aims to investigate the influence of individual and hybrid fiber on the local bond-slip behavior of medium and high strength concrete after exposure to different high temperatures. Tests were conducted on local pullout specimens (150 mm cubes) with a reinforcing bar embedded in the center section. The embedment lengths in the pullout specimens were three times the bar diameter. The parameters investigated include concrete type (control group: ordinary concrete; experimental group: fiber concrete), concrete strength, fiber type and targeted temperature. The test results showed that the ultimate bond stress in the local bond stress versus slip curve of the high strength fiber reinforced concrete was higher than that of the medium strength fiber reinforced concrete. In addition, the use of hybrid combinations of steel fiber and polypropylene fiber can enhance the residual bond strength ratio of high strength concrete.

한국종의 진동 맥놀이 투닝법 (Control Method of the Vibration Beat in a Korean bell)

  • 김석현
    • 한국소음진동공학회:학술대회논문집
    • /
    • 한국소음진동공학회 2009년도 춘계학술대회 논문집
    • /
    • pp.359-360
    • /
    • 2009
  • In this study, we propose a practical method to improve the clarity and the period of the beat in a Korean bell. Proper beating in vibration and sound is very important feature in Korean bell. An equivalent ring theory is applied and finite element analysis is performed to determine the condition of the asymmetry of the bell. The clearity and the period of the beat are improved by attaching a counter mass or decreasing local thickness. This paper shows that the improved the attaching a counter mass or decreasing local thickness. This paper of the beat are improved by attaching a counter mass or decreasing local thickness. This paper shows that the amount and position of the local variation for the required beat condition can be predicted by using the equivalent model, The predicted results are verified by the experiment.

  • PDF

DNA 코딩 방법을 이용한 국소 퍼지 추론규칙의 자동획득 (Automatic acquisition of local fuzzy reasoning rules through DNA coding method)

  • 박종규;윤성용;오성권;안태천
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 1999년도 하계학술대회 논문집 B
    • /
    • pp.543-545
    • /
    • 1999
  • In this paper, the composition method of global and local fuzzy reasoning concepts is researched for reducing the number of rules, not losing the performance for fuzzy controller. A new method is proposed in details that controls the interaction between global reasoning and local reasoning. In order to automatically acquire and optimize the method, the DNA coding algorithm is introduced to the local fuzzy reasoning of the proposed composition fuzzy reasoning method. The method is applied to the real liquid level control system for the purpose of evaluating the Performance. The simulation results show that the proposed technique can produce the fuzzy rules with higher accuracy and feasibility than the conventional methods.

  • PDF

Mesh 스크린을 이용한 충돌제트 열전달 제어에 관한 연구 (Control of Impinging Jet Heat Transfer with Mesh Screens)

  • 조정원;이상준
    • 대한기계학회:학술대회논문집
    • /
    • 대한기계학회 2000년도 추계학술대회논문집B
    • /
    • pp.267-271
    • /
    • 2000
  • The local heat transfer rate of an axisymmetric submerged air jet impinging on normal to a heated flat plate was investigated experimentally with varying solidity of mesh screen. The mean velocity and turbulent Intensity profiles of streamwise velocity component were measured using a hot-wire anemometry. The temperature distribution on the heated flat surface was measured with thermocouples. The screen installed in front of the nozzle exit(behind of 35mm) modify the jet flow structure and local heat transfer characteristics. For higher solidity screen, turbulence intensity at core lesion is high and increases the local heat transfer rate at nozzle-to-plate spacings(L/D<6). For larger nozzle-to-plate spacings(L/D>6), however, the turbulent Intensities of all screens tested in this study approach to an asymptotic curve, but the small mean velocity at the core region reduces the local heat transfer rate for high solidity screens.

  • PDF

조향규칙 학습을 이용한 자율주행로봇의 지역경로계획설계 (Local Path Planning Design of Autonomous Mobile Robot using The Direction Indicator Rules Learning)

  • 박경석;최한수;정헌
    • 대한전자공학회:학술대회논문집
    • /
    • 대한전자공학회 2002년도 하계종합학술대회 논문집(5)
    • /
    • pp.25-28
    • /
    • 2002
  • The path planning of autonomous mobile robot use two method. One is global path planning and another is local path planning. In this paper, We study the local path planning of autonomous mobile robot move in unknown enviroment. This local path planning is based on neural network using the direction indicator rules learning. also the system is made up of sensor system. The motion control system for real-time execution. The experimental results show that the developed direction indicator system operates properly and strongly at circumstance.

  • PDF

MOTION VECTOR DETECTION ALGORITHM USING THE STEEPEST DESCENT METHOD EFFECTIVE FOR AVOIDING LOCAL SOLUTIONS

  • Konno, Yoshinori;Kasezawa, Tadashi
    • 한국방송∙미디어공학회:학술대회논문집
    • /
    • 한국방송공학회 2009년도 IWAIT
    • /
    • pp.460-465
    • /
    • 2009
  • This paper presents a new algorithm that includes a mechanism to avoid local solutions in a motion vector detection method that uses the steepest descent method. Two different implementations of the algorithm are demonstrated using two major search methods for tree structures, depth first search and breadth first search. Furthermore, it is shown that by avoiding local solutions, both of these implementations are able to obtain smaller prediction errors compared to conventional motion vector detection methods using the steepest descent method, and are able to perform motion vector detection within an arbitrary upper limit on the number of computations. The effects that differences in the search order have on the effectiveness of avoiding local solutions are also presented.

  • PDF

Alternative practices of achieving anaesthesia for dental procedures: a review

  • Angelo, Zavattini;Polyvios, Charalambous
    • Journal of Dental Anesthesia and Pain Medicine
    • /
    • 제18권2호
    • /
    • pp.79-88
    • /
    • 2018
  • Managing pain and anxiety in patients has always been an essential part of dentistry. To prevent pain, dentists administer local anaesthesia (LA) via a needle injection. Unfortunately, anxiety and fear that arise prior to and/or during injection remains a barrier for many children and adults from receiving dental treatment. There is a constant search for techniques to alleviate the invasive and painful nature of the needle injection. In recent years, researchers have developed alternative methods which enable dental anaesthesia to be less invasive and more patient-friendly. The aim of this review is to highlight the procedures and devices available which may replace the conventional needle-administered local anaesthesia. The most known alternative methods in providing anaesthesia in dentistry are: topical anaesthesia, electronic dental anaesthesia, jet-injectors, iontophoresis, and computerized control local anaesthesia delivery systems. Even though these procedures are well accepted by patients to date, it is the authors' opinion that the effectiveness practicality of such techniques in general dentistry is not without limitations.

Allergic reactions to local anesthetic mepivacaine in dental procedures: a case report

  • Yoonhyoung Nam;Seyeon Min;Wonse Park;Kee-Deog Kim
    • Journal of Dental Anesthesia and Pain Medicine
    • /
    • 제23권3호
    • /
    • pp.173-177
    • /
    • 2023
  • Local anesthetics are an essential part of pain control during dental treatment. Despite its effectiveness and safety, patients should constantly be aware of potential adverse effects, including allergic reactions. Allergic reactions to amide-type local anesthetics (LAs), such as lidocaine and mepivacaine, are rare compared to those to ester-type LAs. Herein, we report the case of a patient with a history of allergy to lidocaine and mepivacaine, with symptoms of itching, diffuse erythema of the wrists and hands, dizziness, and pectoralgia. This case report emphasizes the importance of collecting medical and dental histories of patients is necessary, and how an allergy test in the allergy and clinical immunology department helps select safe LAs for patients.