نتایج جستجو برای: sos

تعداد نتایج: 4511  

2008
Debarati Chattopadhyay Adam M. Ross Donna H. Rhodes

Many qualitative descriptions of Systems of Systems (SoS) exist in the literature, but only heuristics and guiding principles have been suggested with regard to SoS design methods. To assist SoS designers in decision making during conceptual design, prescriptive design methods are required for SoS. To develop a SoS design method, we propose to build on an existing system tradespace exploration ...

2006
Mohammad Reza Mousavi Iain C. C. Phillips Michel A. Reniers Irek Ulidowski

Structured Operational Semantics (SOS) is a popular method for defining semantics by means of deduction rules. An important feature of deduction rules, or simply SOS rules, are negative premises, which are crucial in the definitions of such phenomena as priority mechanisms and time-outs. Orderings on SOS rules were proposed by Phillips and Ulidowski as an alternative to negative premises. The m...

Journal: :International journal of pharmaceutics 2008
J Hongrapipat P Kopecková S Prakongpan J Kopecek

The synergism in anticancer effect toward human renal carcinoma A498 cells by binary combinations of free and N-(2-hydroxypropyl)methacrylamide (HPMA) copolymer-bound anticancer drugs, SOS thiophene (SOS), doxorubicin (DOX), and mesochlorin e6 monoethylenediamine (Mce6), was evaluated. The combination index (CI) analysis was used to quantify the synergism, antagonism, and additive effects. Both...

Journal: :CoRR 2013
Cheng-Jun Wang

The purpose of this study is threefold: first, to bring reference groups back into the framework of spiral of silence (SOS) by proposing an extended framework of dual opinion climate; second, to investigate the boundary conditions of SOS; third, to identify the characteristics of SOS in terms of spatial variation and temporal evolution. Modeling SOS with agent-based models, the findings suggest...

Journal: :Cell 2004
Holger Sondermann Stephen M. Soisson Sean Boykevisch Shao-Song Yang Dafna Bar-Sagi John Kuriyan

The classical model for the activation of the nucleotide exchange factor Son of sevenless (SOS) involves its recruitment to the membrane, where it engages Ras. The recent discovery that Ras*GTP is an allosteric activator of SOS indicated that the regulation of SOS is more complex than originally envisaged. We now present crystallographic and biochemical analyses of a construct of SOS that conta...

2017
Renata Martinuzzi de Lima Daniel de Vargas Lisandra M. Fontoura

System of Systems (SoS) is a subject of interest for many researchers from different research lines. System of Systems Engineering (SoSE) deals with many challenges mainly in the activities related to requirements. In order to explore studies related to Requirements Engineering (RE) for SoS, this Systematic Literature Review, using the Snowballing approach, aims to answer four research question...

Journal: :International Journal of Biological Sciences 2008
Celina Janion

Chromosomal DNA is exposed to continuous damage and repair. Cells contain a number of proteins and specific DNA repair systems that help maintain its correct structure. The SOS response was the first DNA repair system described in Escherichia coli induced upon treatment of bacteria with DNA damaging agents arrest DNA replication and cell division. Induction of the SOS response involves more tha...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2010
Kamlesh K Yadav Dafna Bar-Sagi

Regulated activation of Ras by receptor tyrosine kinases (RTK) constitutes a key transduction step in signaling processes that control an array of fundamental cellular functions including proliferation, differentiation, and survival. The principle mechanism by which Ras is activated down stream of RTKs involves the stimulation of guanine nucleotide exchange by the ubiquitous guanine nucleotide ...

Journal: :international journal of occupational hygiene 0
zahra zamanian department of occupational health engineering , school of health and nutrition, shiraz university of medical sciences, shiraz, iran. mansooreh dehghani department of environmental health engineering, school of health and nutrition, shiraz university of medical sciences, shiraz, iran. heidar mohammady department of environmental health engineering, school of health and nutrition, shiraz university of medical sciences, shiraz, iran. mohammadtaghi rezaeiani department of environmental health engineering, school of health and nutrition, shiraz university of medical sciences, shiraz, iran. hadi daneshmandi department of ergonomics, school of health and nutrition, shiraz university of medical sciences, shiraz, iran.

in today’s advanced world resulting from the improvement of technology, societies tend to encounter a large number of problems and accidents. as we know, university’s security personnel are classified as shift workers and are exposed to health disturbing factors. the aim of this study was investigation of shift work disorders among security personnel of the hospitals affiliated to shiraz univer...

2012
Reshma Maredia Navya Devineni Peter Lentz Shatha F. Dallo JiehJuen Yu Neal Guentzel James Chambers Bernard Arulanandam William E. Haskins Tao Weitao

Bacterial infections can be aggravated by antibiotic treatment that induces SOS response and vesiculation. This leads to a hypothesis concerning association of SOS with vesiculation. To test it, we conducted multiple analyses of outer membrane vesicles (OMVs) produced from the Pseudomonas aeruginosa wild type in which SOS is induced by ciprofloxacin and from the LexA noncleavable (lexAN) strain...

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