왜 프로그래머가 가독성을 향상시키는 수련을 평생 해야 하는지를 알려준다. 단지 상투적인 이유만 들먹이는 게 아니다. 좋은 가독성은 프로그래머를 프로로 만들어주고, 큰 기쁨을 주며, 성장할 기회를 준다고 역설한다. 가독성을 향상시키려면 눈에 보이는 것들부터 신경을 써야 하며, 코드 자체가 프로그램을 설명해야 하며, 흐름을 단순화하고 주석을 잘 쓰고 퇴고해야 한다는 간단한 원칙부터 지켜나가야 한다.
This document discusses NAVER's Data Center "GAK" and its infrastructure engineering. It provides an overview of the data center's start and describes server room automation and monitoring tools. It also discusses the application of green technologies and their effects. The document includes charts showing growth trends of data and services over time at NAVER.
CasperJS is a headless browser solution for automating monitoring built with JavaScript and PhantomJS. It allows periodically monitoring web servers to ensure they are functioning properly and prevent issues like outages from negatively impacting customers. Other similar services include monitor.us, uptimerobot.com, and Zabbix. Self-hosted solutions may require more customization.
왜 프로그래머가 가독성을 향상시키는 수련을 평생 해야 하는지를 알려준다. 단지 상투적인 이유만 들먹이는 게 아니다. 좋은 가독성은 프로그래머를 프로로 만들어주고, 큰 기쁨을 주며, 성장할 기회를 준다고 역설한다. 가독성을 향상시키려면 눈에 보이는 것들부터 신경을 써야 하며, 코드 자체가 프로그램을 설명해야 하며, 흐름을 단순화하고 주석을 잘 쓰고 퇴고해야 한다는 간단한 원칙부터 지켜나가야 한다.
This document discusses NAVER's Data Center "GAK" and its infrastructure engineering. It provides an overview of the data center's start and describes server room automation and monitoring tools. It also discusses the application of green technologies and their effects. The document includes charts showing growth trends of data and services over time at NAVER.
CasperJS is a headless browser solution for automating monitoring built with JavaScript and PhantomJS. It allows periodically monitoring web servers to ensure they are functioning properly and prevent issues like outages from negatively impacting customers. Other similar services include monitor.us, uptimerobot.com, and Zabbix. Self-hosted solutions may require more customization.
Agricultural film plays a critical role in raising agricultural productivity. Almost 550,000 tonnes of agricultural film were consumed in Europe in 2011, with silage film accounting for over half of total usage. While demand for agricultural film in tonnage terms is expected to remain stable, some countries like Poland and Central/Eastern Europe may see appreciable growth. Innovation in agricultural film focuses on developing more durable films that extend the growing season and increase yields.
The document is the June/July 2011 issue of Film & Sheet Extrusion magazine. It includes the following articles:
- An article about growing global demand for pallet stretch film and Asia leading the growth.
- An article on how biaxial orientation is commonly used with polypropylene but can also benefit other polymers.
- An article discussing how rapidly cooling polyolefin film can produce high clarity opening new applications.
The issue also includes various industry news briefs on topics like the European Commission considering a plastic bag ban in Europe, companies expanding production capacities, and a trial by Dow showing the benefits of energy recovery from recycled plastic film.
Agricultural film plays a critical role in raising agricultural productivity. Almost 550,000 tonnes of agricultural film were consumed in Europe in 2011, with silage film accounting for over half of total usage. While demand for agricultural film in tonnage terms is expected to remain stable, some countries like Poland and Central/Eastern Europe may see appreciable growth. Innovation in agricultural film focuses on developing more durable films that extend the growing season and increase yields.
The document is the June/July 2011 issue of Film & Sheet Extrusion magazine. It includes the following articles:
- An article about growing global demand for pallet stretch film and Asia leading the growth.
- An article on how biaxial orientation is commonly used with polypropylene but can also benefit other polymers.
- An article discussing how rapidly cooling polyolefin film can produce high clarity opening new applications.
The issue also includes various industry news briefs on topics like the European Commission considering a plastic bag ban in Europe, companies expanding production capacities, and a trial by Dow showing the benefits of energy recovery from recycled plastic film.
13. 경질피복재 연질피복재 유리 PET( 폴리에스터 판 ) PC( 폴리카보네이트 ) FRP ( 유리섬유강화판 ) PVC( 폴리염화비닐 ) PO ( 폴리올레핀 ) < 참고 1> 피복자재의 형태별 분류 PE( 폴리에틸렌 ) EVA( 초산비닐 )
14.
15. < 참고 3> 농업용 필름의 원료별 특성 및 사용현황 고밀도 폴리에틸렌 저밀도 폴리에틸렌 선형 저밀도 폴리에틸렌 밀도 : 0.940 ~ 0.960 0.918 ~ 0.930 0.915 ~ 0.938 (1) PE 구조 : (2) PE 의 특성 . 강성 인장강도 충격강도 열융착 가공성 유연성 투명성 강점 125~135 115~125 100~115 용융온도 (℃) 0.940~0.965 0.910~0.940 0.910~0.925 밀도 Linear( 선형 ) Linear( 선형 ) Branch( 가지 ) 구조 Low Low High 중합압력 HDPE LLDPE LDPE
16. (3) EVA 분 자 구 조 : H I I H H I I H R – C – C – C – C – C - R H I I H H I I O I C = O I O I H H I I H (4) EVA 필름 ( 농업용 ) 의 특성 . - Low EVA 필름 VA 함량 : 3~6% - High EVA 필름 VA 함량 : 9~15% EVA 필름 ( 농업용 ) VA 함량 단순 PE 에 비해 인장강도 , 충격강도 , 유연성 , 투명성 , 첨가제 반응이 뛰어나다 . EVA 필름의 특성 EVA 의 용도 : 압출코팅 , 농업용필름 , 발포용으로 사용된다 . 초산기 COOH-