Low-cost computer-controlled asynchronous-video cross-hair device
نویسندگان
چکیده
منابع مشابه
Computer Network Time Synchronization using a Low Cost GPS Engine
Accurate and reliable time is necessary for financial and legal transactions, transportation, distribution systems, and many other applications. Time synchronization protocols such as NTP (the Network Time Protocol) have kept clocks of such applications synchronized to each other for many years. Nowadays there are many commercial GPS based NTP time server products at the market but they almost ...
متن کاملLow-cost computer-controlled current stimulator for the student laboratory.
Electrical stimulation of nerve and muscle tissues is frequently used for teaching core concepts in physiology. It is usually expensive to provide every student group in the laboratory with an individual stimulator. This article presents the design and application of a low-cost [about $100 (U.S.)] isolated stimulator that can be controlled by two analog-output channels (e.g., output channels of...
متن کاملThe cross-section trichometer: a new device for measuring hair quantity, hair loss, and hair growth.
BACKGROUND Office physicians are unable to measure hair quantity, hair loss, and hair growth in a simple and meaningful manner. One solution is to measure the cross-sectional area of a bundle of hair that is growing within a premeasured cross-section of scalp. OBJECTIVE The objective was to design a mechanical device that precisely measures the cross-sectional area of a bundle of hair and des...
متن کاملLow Cost Device For Light Flicker Measurement
A new instrument for the evaluation of disturbances caused by variations in lamp voltage (light flicker) is proposed, based on light intensity measurements. Unlike current standard (IEC EN 61000-4-15), which determines flicker severity by filtering powering voltage measurements with a standard lamp model (230V/60W), the presented methodology includes the lamp itself in the measurement process, ...
متن کاملVideoPal: Exploring Asynchronous Video-Messaging to Enable Cross- Cultural Friendships
Pen pal programs for connecting students from around the world through letter writing have been popular for generations. However, traditional technologies have several limitations in supporting pen pal activities. In this study, we explored the potential of video-based asynchronous messaging in supporting the development of children’s cross-cultural friendships. This paper presents the results ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Medical and Biological Engineering and Computing
سال: 1987
ISSN: 0140-0118,1741-0444
DOI: 10.1007/bf02443371