• 제목/요약/키워드: pae

검색결과 781건 처리시간 0.035초

특별기고 / 사용자 테스트로 게임 향상시키기

  • 멜리사패데로프
    • 디지털콘텐츠
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    • 7호통권122호
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    • pp.146-150
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    • 2003
  • 대부분의 게임 디자이너들은 베타버전이 나와 제품에 대한 품질 확인 문의가 생길 때까지 제품에 대한 피드백을 받지 않는다. QA 테스터는 게임 제작의 관행을 깨기 위해 노력하고 있다. 특히 QA 테스터는 버그와 밸런스 문제를 찾고 주요 게임 플레이 문제까지도 찾아낸다. 하지만 이들이 디자인 문제에 대해 피드백을 준다고 하더라도 제품은 몇 달 이내의 빠른 시간 내에 선적되어야 하기 때문에 이 문제를 모두 해결하려면 시간이 너무 늦어진다.

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CMOS Linear Power Amplifier with Envelope Tracking Operation (Invited Paper)

  • Park, Byungjoon;Kim, Jooseung;Cho, Yunsung;Jin, Sangsu;Kang, Daehyun;Kim, Bumman
    • Journal of electromagnetic engineering and science
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    • 제14권1호
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    • pp.1-8
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    • 2014
  • A differential-cascode CMOS power amplifier (PA) with a supply modulator for envelope tracking (ET) has been implemented by 0.18 ${\mu}m$ RF CMOS technology. The loss at the output is minimized by implementing the output transformer on a FR-4 printed circuit board (PCB). The CMOS PA utilizes the $2^{nd}$ harmonic short at the input to enhance the linearity. The measurement was done by the 10MHz bandwidth 16QAM 6.88 dB peak-to-average power ratio long-term evolution (LTE) signal at 1.85 GHz. The ET operation of the CMOS PA with the supply modulator enhances the power-added efficiency (PAE) by 2.5, to 10% over the stand-alone CMOS PA for the LTE signal. The ET PA achieves a PAE of 36.5% and an $ACLR_{E-UTRA}$ of -32.7 dBc at an average output power of 27 dBm.

폴리머 시멘트계 Self leveling 바닥마감재의 기초성능평가 (Basic Efficiency Assessment of polymer cementitious Self leveling for floor-finishing materials)

  • 도정윤;김완기;소양섭
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2001년도 봄 학술발표회 논문집
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    • pp.1005-1010
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    • 2001
  • Recently, polymer-modified mortar has been studied for proposed use on industrial floors as top layers with thin thicknesses, typically 5~ 15mm. The purpose of this study is to evaluate basic properties of self leveling materials using polymer modifier as kinds of SBR, PAE, SUBA. Superplasticizer and thickener have been included in the mixes to reduce bleeding and drying shrinkage as well as in order to facilitate the workability required. The self leveling materials using four types of polymer dispersion are prepared with polymer-cement ratios which respectively range from 50%, 75%, and were tested for basic characteristics such as adhesion in tension, crack resistance test, rebound test after the preparative tests for unit weight, air content, consistency ratio etc. The results show almost as equal quality as existing commercial industrial flooring when mortar is modified by polymer dispersion. Adhesion in tension of polymer modified mortars using each SBR and PAE emulsion was over 10 kgf/$cm^{2}$. Crack or flaw derived from shrinkage is strongly dependent on the type of polymer dispersion because of each different total solid of polymer. It is judged that polymer modified mortar with self-leveling can be very well suited for Floor-finished.

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