The case describes the market growth of Web Reservation International an Irish SME company, which is a market leader in the Budget, Independent and Youth Travel (BIYT) market through its online reservation system. The case describes the development of the company through organic growth and acquisitions. The case raises four main questions. Is the WRI domination position sustainable in the long ...

In write-once memory (e.g., Flash), a cell’s level can only be raised, and erasure is only in bulk. The total number of erasures (endurance) is limited, and drops sharply with technology shrinkage and with cell-capacity increase. The normalized write capacity (ratio of total amount of data that can be written to storage capacity) drops similarly. Various coding schemes enable overwrites at the ...

With the rise of portal sites for image-file download of musical scores, the electronic distribution of musical scores, an activity in progress of 15 years, has attracted increased attention. We describe several data models for score distribution and emphasize the one used in the MuseData archive of musical data (1984–). This archive (containing substantial quantities of the music of Bach, Hand...

We study the problem of computing the k-visibility region in the memory-constrained model. In this model, the input resides in a randomly accessible read-only memory of O(n) words, with O(logn) bits each. An algorithm can read and write O(s) additional words of workspace during its execution, and it writes its output to write-only memory. In a given polygon P and for a given point q ∈ P , we sa...

there have been many differences on the subject of literacy or illiteracy of prophet muhammad (peace be upon him) for a long time. many have said that he was not able to read or write throughout his life. they ratiocinate depending on the words of (ommi) and (ommien) in holy quran, meaning illiterate in dictionaries, or the story of the treaty of hudaybiyya. this can be considered as an unaccep...

We present an access method for timeslice queries that reconstructs a past state s(t) of a time-evolving collection of objects, in O(log,, n + Is(t)l/b) I/O ‘8, where Is(t)1 denotes the size of the collection at time t, n is the total number of changes in the collection’s evolution and b is the size of an I/O transfer. Changes include the addition, deletion or attribute modification of objects;...

سخن سردبیر Editorial مجله دانشگاه علوم پزشکی رفسنجان دوره 21، دی 1401، 1006-1005 چگونه یک مروری بر کتاب بنویسیم؟ How to Write a Book Review? محسن رضائیان[1] Mohsen Rezaeian در یکی از سخن‌های سردبیری مجله دانشگاه، به توضیح انواع مقالات غیر پژوهشی (Non-research articles) پرداختیم. در همان جا توضیح دادیم که یکی از انواع مقالات غیر پژوهشی بسیار مهم که می‌تواند توسط دانشمندان نو...

Cohen, G.D. and G. Zemor, Write-isolated memories (WIMs), Discrete Mathematics 114 (1993) 105-113. A write-isolated memory (WIM) is a binary storage medium on which no change of two consecutive positions is allowed when updating the information stored. We prove that the optimal rate for writing on a WIM is log,(l +$);‘2 =0.69. We give asymptotic constructions achieving 0.6.

Scheme is one of only a few languages with a concise specification and formal semantics. With such a foundation it should be easy to write portable code that, without modification, runs correctly on different Scheme implementations. Yet this goal has proved elusive – there are more than fifty Schemes and writing programs that are portable between even just a few of these implementations is tedi...