نتایج جستجو برای: without

تعداد نتایج: 797957  

Journal: :Mechanisms of Development 2002
A Caprioli R Goitsuka C Pouget D Dunon T Jaffredo

Notch signalling is an important evolutionary conserved mechanism known to control cell fate choices through local interactions. Here, the patterns of expression of Notch-1 and -2 genes and their ligands Delta-1, Serrate-1 and -2, were established in the early blastodisc of the chicken embryo from the pre-streak to the first somite stages. Delta-1 was detected as early as the pre-streak stage i...

2008
Fengming Wang

The definition of privacy, according to Merriam-Webster, is the quality or state of being apart from company or observation. Under the rapid development of internet technology, people’s right to maintain private lives have been challenged by the massive volume of information one can access and the fast speed at which information traverse spatially. The paper explains two typical reasons why cur...

2004
Nathan Russell

Developments in electronic communications have created many new uses for the letter “e”—“e-commerce,” “e-learning,” “e-governance,” and so forth. These terms point to some of the ways in which modern information and communications technologies (ICTs) are changing how millions of people work and live. Against that background, it makes sense for the International Center for Tropical Agriculture (...

Journal: :Maturitas 2013
Allen R Huang Louise Mallet

People are living to older age. Demographic pressures are driving change. Opiate analgesics are the most powerful known pain relievers. Persistent pain, both cancer and non-cancer types is frequent in older adults. The use of opioid analgesics is appropriate in the treatment of moderate to severe persistent pain. The challenge of prescribing opioids in older adults is to understand the factors ...

Journal: :Journal of cellular biochemistry 2009
Michael C Marvin David R Engelke

The "RNA World" hypothesis suggests that life developed from RNA enzymes termed ribozymes, which carry out reactions without assistance from proteins. Ribonuclease (RNase) P is one ribozyme that appears to have adapted these origins to modern cellular life by adding protein to the RNA core in order to broaden the potential functions. This RNA-protein complex plays diverse roles in processing RN...

Journal: :Complex Systems 1996
David Griffeath Cristopher Moore

It is shown that if a cellular automaton (CA) in two or more dimensions supports growing “ladders” which can turn or block each other, then it can express arbitrary boolean circuits. Thus the problem of predicting the CA for a finite amount of time becomes P-complete, the question of whether a finite configuration grows to infinity is P-hard, and the long-term behavior of initial conditions wit...

2007
Florian Hoffmann Angelika M. Vollmar

Diese Dissertation wurde selbständig, ohne unerlaubte Hilfe erarbeitet.

2016
Rajesh Singh Sachin Malik S. B. Gupta

An almost unbiased estimator using known value of some population parameter(s) is proposed. Under simple random sampling without replacement (SRSWOR) scheme the expressions for bias and mean square error (MSE) are derived. Numerical illustrations are given.

Journal: :Industrial health 1998
T Iwasaki M Takahashi H Saito H Arito

The adaptation of cardiovascular and thermoregulatory responses to ozone (O3) was examined by repeated exposure of electrocardiographic (ECG) electrode- and thermistor sensor-implanted rats to O3 for 4 consecutive days (8 hrs/day). Circadian rhythms of heart rate (HR) and abdominal core temperature (Tco) were disrupted on the first and second O3 exposure days in a concentration dependent manner...

2017
Maria-Rosario Luquin Jaime Kulisevsky Pablo Martinez-Martin Pablo Mir Eduardo S Tolosa

To date, no consensus exists on the key factors for diagnosing advanced Parkinson disease (APD). To obtain consensus on the definition of APD, we performed a prospective, multicenter, Spanish nationwide, 3-round Delphi study (CEPA study). An ad hoc questionnaire was designed with 33 questions concerning the relevance of several clinical features for APD diagnosis. In the first-round, 240 neurol...

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