ACORDE is one of the ALICE detectors, presently under construction at CERN. It consists of an array of plastic scintillator counters placed on the three upper faces of the ALICE magnet. It will act as a cosmic ray trigger, and, together with other ALICE sub-detectors, will provide precise information on cosmic rays with primary energies around 10 ÷ 10 eV. Here we describe the design of ACORDE a...

یکی از پارامترهای مهم محیط­های پخش نوترون، طول نوترون حرارتی است. روش مرسوم محاسباتی استفاده کد MCNP برمبنای توزیع شار در محیط و برازش تابع ریاضی مربوطه بر آن این پژوهش، روشی نوین که مبنای کارت PTRAC است، ارایه شده پارامتر برای آب­سبک اساس روش­های فوق محاسبه با مقادیر گزارش مراجع مقایسه گردیده تطابق خوبی نیز مشاهده حسن فوق، عدم نیاز به علاوه فرض می­شود تا محل چشمه، فاصله­ی کافی وجود دارد. مسأله...

Biographical note: Alice Sullivan is a Research Officer at the Bedford Group for Lifecourse and Statistical Studies, Institute of Education, University of London. Current projects include a study of co-educational and single-sex schooling. Acknowledgements: Many thanks to John Bynner, Anthony Heath, Geoffrey Walford and two referees. This work was funded by an ESRC studentship.

The is the fifth in a series of research reports from the first phase of the ALiCE II project. This report presents the background and technical details of the cellular wireless internet communication subsystem for the Autonomous Line Crawling Equipment (ALiCE II) robot. ALiCE II is a second generation version of a new family of autonomous line-crawling robotic devices using swarm intelligence ...

We consider a simple streaming game between two players Alice and Bob, which we call the mirror game. In this game, Alice and Bob take turns saying numbers belonging to the set {1, 2, . . . , 2N}. A player loses if they repeat a number that has already been said. Bob, who goes second, has a very simple (and memoryless) strategy to avoid losing: whenever Alice says x, respond with 2N+1−x. The qu...

Alice gets a k-bit message x to send to Bob. Unfortunately, the communication channel is corrupted, and some number of bits may flip. For conceretness, say twenty percent of all bits sent on the channel may flip. Which bits are flipped is unknown, and different bits may flip for different messages sent on the channel. Can Alice still send a message that can be reliably received by Bob? We allow...

Consider the following situation: Alice is a hand-held device, such as a PDA. Bob is a device providing a service, such as an ATM, an automatic door, or an anti-aircraft gun pointing at the gyro-copter in which Alice is travelling. Bob and Alice have never directly met before, but share a key as a result of secure hand-offs. Alice has used this key to request a service from Bob (dispense cash, ...

This article presents a quantum transmission problem, in which Alice is trying to send a number of qbits to Bob. Alice has access to two channels, one that sends classical bits and another that sends quantum bits. We show that under certain error terms, Alice can optimize transmission, up to logarithmic precision, by sending only a classical description of the qbits.