Cycimns were originally defined as proteins which are synthesized in each cell cycle and destroyed at every mitosis. Cyclins were discovered by T. Hunt and students at the Marine Biological Laboratory, Woods Hole, MA, duningthe 1982 Physiology Course (1). They labeled eggs ofthe sea urchin Arbacia punctulata with [35S]methionine after fertilization and analyzed the temporal pattern of protein s...

宇宙開発 におけ る安全性 と経済性の要求か ら宇宙 ロボ ットに関す る研究1)~ηが進め られてい る.宇 宙 ロボ ット で大 きな問題 の一つ にエ ネルギ ーの供給法があ る.打 ち 上げ にかか るコス トが莫大なため,ロ ボ ットの質量は出 来 るだけ小 さくす る必要があ り,大 きなバ ッテ リーは積 み込めない.宇 宙空間では太陽かち無限にエネルギを引 き出す ことが出来 る.し か し太陽電 池の性能は,容 量 0.2~0.3(kW/m2),比 電 力50(W/kg)程 度8)であ り, マ ニピュレータの駆 動時 に必要 な電 力を太陽電 池のみか ら供給す るためには,通 常の運用時 の必要電 力に比べ て 過 大な容量 の太陽電 池 システムが必要 とな り,大 型化 を 招 く.ま たマ ニピュレータを制動す る際 に余剰 エネルギ を熱 として発生 さ...

1,2,3 B.E. Scholar BVCOE&RI Nashik(India) ABSTARCT Antiknock braking systems are used in modern cars to prevent the wheels from locking after brakes are applied. The dynamics of the controller needed for antiknock braking system depends on various factors. The vehicle model often is in nonlinear form. Controller demand to provide a controlled torque necessary to maintain optimum value of the wh...

poor stand establishment of canola (brassica napus l.) under flatland mechanized planting and crust-forming soil is a major problem for farmers in central iran. previous research there showed that irrigated cotton emergence on crust-forming soils under flatland planting can be significantly improved using a double-disk planter with zero-pressure press wheel tires and no crust-breaking. in that ...

The bounding gait for the Platform for Ambulating Wheels (PAW), a new and unique hybrid wheeled-leg system is presented here. Two hypotheses are tested and discussed: first, that the robot’s forward speed can be increased by increasing the leg liftoff angles and, second, that addition of distally-mounted actuated wheels can be used in running gaits such as the bound. Both hypotheses were tested...

A letter to the editor. Meals on Wheels (MOW) is a community-based not-forprofit organisation that delivers nutritious meals to vulnerable clients in the community, to enable them to maintain their health and independence within their own home. MOW meals aim to provide at least one-third of the recommended dietary intake (RDI) for energy, fibre and calcium, and one-half of the RDI for protein, ...

OBJECTIVE Overbraking and underbraking have been shown to be common factors in motorcycle crashes. Antilock braking systems (ABS) prevent wheels from locking during braking and may make riders less reluctant to apply full braking force. The objective of this study was to evaluate the effect of ABS in fatal motorcycle crashes. METHODS Motorcycle drivers involved in fatal crashes per 10,000 reg...

..................................................................................................................................................... 1 Students vs. Skills: Partitioning Variance Explained in Learner Models ........................................... 2 The Opportunity Count Model: A Flexible Approach to Modeling Student Performance ............. 10 Enhancing the Efficiency and R...