• Title/Summary/Keyword: ATE

Search Result 1,167, Processing Time 0.025 seconds

A Study on Measurement Accuracy and Required Time based on SCPI of Power Meter in Ka Band (Ka 밴드에서 Power Meter 계측 명령어에 따른 측정 정확도와 소요시간에 대한 연구)

  • Cho, Tae-Chong;Shin, Suk-Ho
    • The Journal of the Institute of Internet, Broadcasting and Communication
    • /
    • v.20 no.5
    • /
    • pp.51-56
    • /
    • 2020
  • Measurement accuracy and required time is important to make ATE(Automatic test equipment) system in Ka band, and SCPI commands of power meter which is a representative RF test equipment are studied in this paper. Comparison data between FETCH and MEASURE which are SCPI commands are measured in 30 G ~ 31 GHz and -70 ~ +20 dBm using two power sensor. The data show that FETCH which is the fastest SCPI is able to get reliable data in linear interval above noise level. MEASURE which is the best accurate command takes longer time than FETCH, and the longest time is 13.2 seconds. These results offer that measurement accuracy and required time of the two SCPI for power meter and would be used as a guideline for efficient ATE system in Ka band.

A Study on the Survey of Eating out Food Preference of College Students in Seoul (서울지역 대학생의 외식실태 및 기호도 조사연구 (I))

  • 노정미
    • Journal of the Korean Home Economics Association
    • /
    • v.27 no.2
    • /
    • pp.65-74
    • /
    • 1989
  • The purpose of this study was to investigate the state of eating out and the food preference of college students in Seoul. This survey was carried out through questionaires, and the subjects were 158 male and 159 female students. The result obtained were summarized as follows; 1) Female students had more regular breakfast than male students, and male students had more regular dinner than female students. 2) Male and higher grade students brought home-made lunches more frequently than female students, and others ate out in campus dinning room and off campus dinning room. 3) Most of subjects (77.3%) ate out more than once a day, they ate out in lunch time more frequently than other times. 4) Male and female students used different type of restaurant. 5) The most favorite food of male students in eating out was a Dongas, and that of female students was Nangmyun.

  • PDF

Efficient Multi-site Testing Using ATE Channel Sharing

  • Eom, Kyoung-Woon;Han, Dong-Kwan;Lee, Yong;Kim, Hak-Song;Kang, Sungho
    • JSTS:Journal of Semiconductor Technology and Science
    • /
    • v.13 no.3
    • /
    • pp.259-262
    • /
    • 2013
  • Multi-site testing is considered as a solution to reduce test costs. This paper presents a new channel sharing architecture that enables I/O pins to share automatic test equipment (ATE) channels using simple circuitry such as tri-state buffers, AND gates, and multiple-input signature registers (MISR). The main advantage of the proposed architecture is that it is implemented on probe cards and does not require any additional circuitry on a target device under test (DUT). In addition, the proposed architecture can perform DC parametric testing of the DUT such as leakage testing, even if the different DUTs share the same ATE channels. The simulation results show that the proposed architecture is very efficient and is applicable to both wafer testing and package testing.

Clothing and Self-Image (의복과 자기이미지)

  • 정인희;이은영
    • Journal of the Korean Society of Clothing and Textiles
    • /
    • v.20 no.1
    • /
    • pp.207-217
    • /
    • 1996
  • Self is well·expressed by clothing, so self-image can be an effective variable for conducting clothing·behavior studies. But there ate some problems in clothing and self-image researches. This paper will be a clue to discuss these problems. The contents of this study are as follows. (1) The notion of self-image is compared with self-concept, and according to this work, self concept comprehends the evaluative properties in addition to self-image illustration. In tai.; part, the problem in translating the terminologies, 'self-concept' and 'self-image', are also discussed. (2) The aspects of self-image are explored, thus physical and social-psychological aspects are determined. (3) Two sub-dimensions of self-image ate recommended relating to clothing researches: actual versus ideal and intrinsic versus phenomenal. (4) Some comments for future studies ate added. It is needed to investigate the relationships of other social- psychological variables and self-image in clothing department.

  • PDF

Constructional Constraints in English Free Relative Constructions

  • Kim, Jong-Bok
    • Language and Information
    • /
    • v.5 no.1
    • /
    • pp.35-53
    • /
    • 2001
  • As a subtype of English relative clause constructions, free relative constructions like what John ate in I ate what John ate exhibit complicated syntactic and semantic properties. In particular, the constructions have mixed properties of nominal and verbal: they have the internal syntax of sentence and the external syntax of noun phrase. This paper provides a constraint-based approach to these mixed constructions, and shows that simple constructional constraints are enough to capture their complexities. The paper begins by surveying the properties of the constructions. In discusses two types(Specific and nonspecific) of free relatives, their ,lexical restrictions nominal properties and behavior with respect to extraposition, piped piping and stacking Following these it sketches the basic framework of the HPSG(Head-driven Phrase Structure Grammar) which is of relevance in this paper. As the main part, the paper presents a constraint- based analysis in which tight interactions between grammatical constructions and a rich network of inheritance relations play important roles in accounting for the basic as well as complex properties of the constructions is question.

  • PDF

The Method of Parallel Test Efficiency Improvement using Multi-Clock Mode (멀티클럭 모드를 이용한 병렬 테스트 성능 향상 기법)

  • Hong, Chan Eui;Ahn, Jin-Ho
    • Journal of the Semiconductor & Display Technology
    • /
    • v.18 no.3
    • /
    • pp.42-46
    • /
    • 2019
  • In this paper, we introduce the novel idea to improve parallel test efficiency of semiconductor test. The idea includes the test interface card consisting of NoC structure able to transmitting test data regardless of ATE speed. We called the scheme "Multi-Clock" mode. In the proposed mode, because NoC can spread over the test data in various rates, many semiconductors are tested in the same time. We confirm the proposed idea will be promising through a FPGA board test and it is important to find a saturation point of the Multi-Clock mode due to the number of test chips and ATE channels.

A Concurrent Testing of DRAMs Utilizing On-Chip Networks (온칩네트워크를 활용한 DRAM 동시 테스트 기법)

  • Lee, Changjin;Nam, Jonghyun;Ahn, Jin-Ho
    • Journal of the Semiconductor & Display Technology
    • /
    • v.19 no.2
    • /
    • pp.82-87
    • /
    • 2020
  • In this paper, we introduce the novel idea to improve the B/W usage efficiency of on-chip networks used for TAM to test multiple DRAMs. In order to avoid the local bottleneck of test packets caused by an ATE, we make test patterns using microcode-based instructions within ATE and adopt a test bus to transmit test responses from DRAM DFT (Design for Testability) called Test Generator (TG) to ATE. The proposed test platform will contribute to increasing the test economics of memory IC industry.

Improving Parallel Testing Efficiency of Memory Chips using NOC Interconnect (NOC 인터커넥트를 활용한 메모리 반도체 병렬 테스트 효율성 개선)

  • Hong, Chaneui;Ahn, Jin-Ho
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.68 no.2
    • /
    • pp.364-369
    • /
    • 2019
  • Generally, since memory chips should be tested all, considering its volume, the reduction in test time for detecting faults plays an important role in reducing the overall production cost. The parallel testing of chips in one ATE is a competitive solution to solve it. In this paper, NOC is proposed as test interface architecture between DUTs and ATE. Because NOC can be extended freely, there is no limit on the number of DUTs tested at the same time. Thus, more memory can be tested with the same bandwidth of ATE. Furthermore, the proposed NOC-based parallel test method can increase the efficiency of channel usage by packet type data transmission.

A Study on the Necessity for Hygiene Education for Children at the Gyeongbuk Community Children Center (경북 지역아동센터 아동들에 대한 위생교육 필요성)

  • Lee, Youn-Jung;Bae, Ji-Hyun
    • The Korean Journal of Food And Nutrition
    • /
    • v.24 no.4
    • /
    • pp.577-588
    • /
    • 2011
  • The purpose of this research was to provide basic educational data on the proper eating habits of children who use the community children center. The results of the research conducted by polling the fourth, fifth, and sixth-grade children of the community children centers are summarized as follows. Male children had more meals and ate them faster than those of female children, and they also tended to watch more TV and read books. Moreover, children of families headed by fathers ate until they were full, whereas children of households headed by mothers ate less. More female than male children skipped breakfast, and the percentage of children who had their meals alone was high among children reared by their grandfathers. Most of the children ate only what they liked. Moreover, male children ate only particular fruits and vegetables, whereas female children ate only beans and miscellaneous cereals. Most of the children recognized that they had eating problems, such as eating only what they liked and eating meals on irregular schedules. Such eating habits were affected mainly by family members such as parents, brothers, and sisters. Female children scored higher than male children in terms of nutrition and hygiene knowledge. Approximately 40~50.3% of all subjects became interested in nutrition and hygiene education at the community children center. Most of the children recognized that nutrition and hygiene education is necessary at the community children center. They also recognized their own eating problems and wanted nutrition and hygiene education to be taught at the community children center. Accordingly, regular educational activities and meals for children in the community children center considered a children's particular home background to improve eating habits in the children.

The Effect of Food Deprivation Length of Pair House Pigs on the Running Speed and Feeding Activity in Solitary and Social Conditions

  • Hsia, L.C.
    • Asian-Australasian Journal of Animal Sciences
    • /
    • v.17 no.2
    • /
    • pp.271-277
    • /
    • 2004
  • The purpose of this experiment was to study the feeding behavior and running speed under various feed deprivation lengths and social environments. Three trials were conducted. Trial 1: ten pigs were trained individually to run a course and eat their feed at the end of the course. The pigs were deprived feed for 1, 5, 10 or 20 h. Trial 2: 1. Two pigs ran and ate together. Both pigs had 5 h of feed deprivation before the run (D5). 2. Two pigs ran and ate alone, but both pigs had 5 h of feed deprivation before the run (S5). 3. Two pigs ran and ate together. Both had 1 h of feed deprivation before the run (D1). 4. Two pigs ran and ate alone and both pigs had 1 h of feed deprivation before the run (S1). 5. Two pigs ran together, one had 5 h of feed deprivation, and the other had 1 h of feed deprivation before the run (51). Trial 3: 1. On the 1st day 5 pairs of pigs had 5 h feed deprivation and could eat feed together at (B) point (D1). 2. On the 2nd day the pigs ran and ate alone at (B) point after 5 h of feed deprivation. Feed was obtainable (D2). On the 3rd to 6th days, the pigs ran in pairs after 5 h of feed deprivation and only the dominant pig ate feed at point (B). The inferior pig was chased back to room and fed there. This stage was continued for four consecutive days, d 3 to 6. In trial 1, the running speed of pigs increased with the length of feed deprivation until 10 h, then being stable afterwards. Total feeding time increased with the length of feed deprivation (p<0.001). Eating speed did not increase with the length of feed deprivation (p>0.05). In trial 2, nine of ten pigs in treatment D5 ran faster than those in S5. Seven of the ten pigs in treatment S1 ran faster than those in treatment D1. The pigs in treatment D5 had significantly higher feed intake (p<0.001) and eating speed (p<0.05) than the pigs in other treatments. In trial 3, there were significant differences on running speed between D1 and D6 (p<0.01) and between D2 and D1, D3, D4 and D5. The inferior pig ran faster in D2 but from 3 to 6 it was the dominant pig that showed the greatest speed in completing the whole course. The results demonstrated that the pigs with low feeding motivation may cause low running speed to feed and low feed intake of the neighbor when compared with pigs kept individually.