نتایج جستجو برای: geographical obstacles distance function geographic

تعداد نتایج: 1546628  

2014
Lisa M Miller Lavern M Vercaigne Louise Moist Charmaine E Lok Navdeep Tangri Paul Komenda Claudio Rigatto Julie Mojica Manish M Sood

BACKGROUND Residing remotely from health care resources appears to impact quality of care delivery. It remains unclear if there are differences in vascular access based on distance of one's residence to dialysis centre at time of dialysis initiation, and whether region or duration of pre-dialysis care are important effect modifiers. METHODS We studied the association of distance from a patien...

Journal: : 2022

Bu çalışma, pandemi sürecinde gerçekleştirilen uzaktan eğitim faaliyetlerine ilişkin karşılaşılan engelleri analiz ederek tek bir çatı altında toplamayı amaçlamıştır. Çalışmada ortaya çıkan sonuçlar, yapılacak faaliyetlerinde dikkat edilmesi gereken noktaları ön plana çıkarması açısından önem arz etmektedir. Araştırmanın yöntemi meta-sentez olarak belirlenmiştir. kapsamda, Covid-19 pandemisi dö...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2008
Chuan-Yang Yin Bing-Hong Wang Wen-Xu Wang Guan-Rong Chen

We investigate the geographical effect on the synchronization of small-world oscillator networks. We construct small-world geographical networks by randomly adding links to one- and two-dimensional regular lattices, and we find that the synchronizability is a nonmonotonic function of both the coupling strength and the geographical distance of randomly added shortcuts. Our findings demonstrate t...

Journal: :Human biology 2015
J Román-Busto

The existing relationship between human populations is a function of their migratory and genetic exchange, which will be inversely proportional to the distance separating them. The effect of geographic distance on population structure may be estimated by means of isonymic methods that use information on the surnames present in a territory as an approximation to the distribution of allele freque...

Journal: :Diversity 2023

Community phylogenetic structure and diversity analysis are useful complements to species-centric approaches in biodiversity studies by providing new insights into the processes that drive community assembly. In this study, we aimed understand differences relative importance of abiotic filtering, biotic interactions, dispersal limitation on assembly trees at different vegetation growth stages. ...

Journal: :CoRR 2007
Olivier Powell Sotiris E. Nikoletseas

Geographic routing is becoming the protocol of choice for many sensor network applications. The current state of the art is unsatisfactory: some algorithms are very efficient, however they require a preliminary planarization of the communication graph. Planarization induces overhead and is not realistic in many scenarios. On the other hand, georouting algorithms which do not rely on planarizati...

2007
Olivier Powell Sotiris E. Nikoletseas

Geographic routing is becoming the protocol of choice for many sensor network applications. The current state of the art is unsatisfactory: some algorithms are very efficient, however they require a preliminary planarization of the communication graph. Planarization induces overhead and is thus not realistic for some scenarios such as the case of highly dynamic network topologies. On the other ...

2012
Johannes Bergsten David T. Bilton Tomochika Fujisawa Miranda Elliott Michael T. Monaghan Michael Balke Lars Hendrich Joja Geijer Jan Herrmann Garth N. Foster Ignacio Ribera Anders N. Nilsson Timothy G. Barraclough Alfried P. Vogler

Eight years after DNA barcoding was formally proposed on a large scale, CO1 sequences are rapidly accumulating from around the world. While studies to date have mostly targeted local or regional species assemblages, the recent launch of the global iBOL project (International Barcode of Life), highlights the need to understand the effects of geographical scale on Barcoding's goals. Sampling has ...

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 In the current disorderly world, securing benefits and achieving optimal security for countries alone is very difficult and unavoidable. Uniting with other countries and powers is a way to advance national goals and provide benefits, and bring more guarantees for countries to survive, advance, develop and peace. The factors and conditions that lead to the unification of the countries have been...

2015
Yuri Gori Ron Wehrens Nicola La Porta Federica Camin

BACKGROUND Tracking timber is necessary in order to prevent illegal logging and protect local timber production, but there is as yet no suitable analytical traceability method. Stable isotope ratios in plants are known to reflect geographical variations. In this study we analysed four stable isotope ratios in order to develop a model able to identify the geographic origin of Norway spruce in th...

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