نتایج جستجو برای: itself
تعداد نتایج: 129574 فیلتر نتایج به سال:
W siedzibie Rektoratu UTP odbył się konkurs krasmówczy dla uczniów z naszego regionu organizowany przez bydgoski oddział English Speaking Union oraz Koło Naukowo-Dyskusyjne Wspólny Język. Do ogólnopolskiego finału zakwalifikowali się Agnieszka Śledzik (I LO Nakło), Jakub Piekut (VII LO Bydgoszcz) (na zdjęciach) oraz Andrzej Chrostowski (VII LO Bydgoszcz), Monika Muszyńska (IX LO Bydgoszcz), Mic...
How mitosis keeps itself in order C ells progress through mitosis by switching protein activities on and off in a clearly defi ned order. The ubiquitin ligase APC/C deactivates mitotic proteins by targeting them for degradation by the proteasome. The APC/C is activated by two different subunits that recognize short sequence motifs, known as D and KEN boxes, in the target proteins. In early mito...
Shape-memory alloys are metal pieces that "remember" their original cold-forged shapes and return to the pre-deformed shape after heating. In this work we construct a software analogous of shape-memory alloys: programs whose code resists obfuscation. We show how to pour arbitrary functions into protective envelops that allow recovering the functions' exact initial code after obfuscation. We exp...
The following is proved: if every bridgeless graph G has a cycle cover of length at most 7/51€(G)I, then every bridgeless graph G has a cycle cover of length at most 7/51€(G)I such that any edge of G is covered once or twice.
In communications, the obstacle to high bandwidth and reliable transmission is usually the interconnections, not the links. Nowhere is this more evident than on the Internet, where broadband connections to homes, offices and now mobile smart phones are a frequent source of frustration, and the interconnections between the roughly 50,000 subnetworks (autonomous systems or ASes) from which it is ...
We have traditionally viewed spam from the receiver’s point of view: mail servers assaulted by a barrage of spam from which we must pick out a handful of legitimate messages. In this paper we describe a system for better filtering spam by exploiting the vantage point of the spammer. By instantiating and monitoring botnet hosts in a controlled environment, we are able to monitor new spam as it i...
Alexis de Tocqueville, a French political scientist and historian who visited America in 1831, is quoted frequently on the distinctions he found between the New and Old Worlds. But some of his other comments highlighted similarities across civilizations: “The village or township is the only association which is so perfectly natural that, wherever a number of men are collected, it seems to const...
An article in American Family Physician summarizing the top 20 research studies of 2011 reported on a number of practical, patientoriented findings.1 One striking feature of this article is the inclusion of several studies that challenge traditional medical opinion. In the 1990s, for example, high-carbohydrate, low-fat diets were all the rage; now the Mediterranean diet is shown to have better ...
Although global food demand is expected to increase 60% by 2050 compared with 2005/2007, the rise will be much greater in sub-Saharan Africa (SSA). Indeed, SSA is the region at greatest food security risk because by 2050 its population will increase 2.5-fold and demand for cereals approximately triple, whereas current levels of cereal consumption already depend on substantial imports. At issue ...
The human body is made up of 37 trillion cells and billions of these die every single day. The body has special cells, called macrophages, which consume dying cells to prevent them from building up in your body. Macrophages are also able to eat any cell that is infected by a bacterium or virus. This helps your body to remain as healthy as possible. Sometimes, the macrophages are given the wrong...
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