نتایج جستجو برای: and poa bulbosa l
تعداد نتایج: 16944088 فیلتر نتایج به سال:
برای رسیدن به عملکرد دام در سطح مطلوب تامین نیاز غذایی دام از نظر عناصر معدنی، ضروری است. به همین منظور، عناصر معدنی چهار گونه مهم مرتعی و مورد چرای دام شامل؛ Dactylis glomerata, Poa bulbosa Bromus tomentellus, و Stipa barbata در مراتع ییلاقی طالقان در مرحله رشد رویشی، گلدهی و بذردهی اندازهگیری شد. بنابراین، از هر گونه سه نمونه و حداقل پنج پایه از نقاط مختلف تیپهای گیاهی، برداشت گردید. تجزیه ...
The Price of Anarchy (PoA) is a measure that compares the ratio between the maximum and minimum of a cost function evaluated at any Nash equilibrium of a game. There have been many results that bound the highest PoA for certain classes of games, but little has been done to explore the distribution of the PoA over a set of games. This project proposes a method to empirically evaluate this distri...
This paper addresses computations of a robustly safe region on the state space for uncertain constrained systems subject to disturbances based on a probabilistic approach. We first define a probabilistic output admissible (POA) set. This set is a subset of the state space which excludes with high probability initial states violating the constraint. Then, an algorithm for computing the POA set i...
Fire is one of the incorporate vegetation management practices for grasslands and semi-arid rangelands. It may affect symbiotic relationship between range plants and mycorrhiza. Accordingly, this research was aimed to investigate the effects of a spring prescribed fire on the symbiotic relationships between mycorrhiza and 6 plant species. The study was conducted in a semi-arid steppe rangeland ...
We identify how to share costs locally in weighted congestion games with polynomial cost functions to minimize the worst-case price of anarchy (POA). First, we prove that among all cost-sharing methods that guarantee the existence of pure Nash equilibria, the Shapley value minimizes the worst-case POA. Second, if the guaranteed existence condition is dropped, then the proportional cost-sharing ...
BACKGROUND Completion of advance directives (ADs) and power of attorney (POA) documents may protect a person's autonomy in future health care situations when the individual lacks decisional capacity. As such situations become naturally much more common in old age, we specifically aimed at providing information on (i) the frequency of ADs/POA in oldest-old individuals and (ii) factors associated...
Biomass burning (BB) is a large source of primary and secondary organic aerosols (POA and SOA). This study addresses the physical and chemical evolution of BB organic aerosols. Firstly, the evolution and lifetime of BB POA and SOA signatures observed with the Aerodyne Aerosol Mass Spectrometer are investigated, focusing on measurements at high-latitudes acquired during the 2008 NASA ARCTAS miss...
OBJECTIVE to analyze AIDS mortality trends in Rio Grande do Sul State (RS) and Porto Alegre City (POA) according to sociodemographic characteristics in the period 2000-2011. METHODS this was an ecological time series study of AIDS mortality rates; Prais-Winsten regression model was used. RESULTS the standardized mortality AIDS rate showed a stationary trend in RS (1.3%; 95%CI: -0..;6.7) and...
A hypertensive 69-year-old man presented with an incidentally discovered non-ruptured aneurysm of the persistent primitive olfactory artery (POA). The POA originates at the terminal portion of the internal carotid artery, runs along the olfactory tract anteriorly toward the crista galli, and forms an acute angle with the distal anterior cerebral artery. The aneurysm was located at this characte...
This is the third column in our series explaining the new OMG Portable Object Adapter. An Object Adapter is the CORBA component responsible for adapting CORBA’s concept of objects to a programming language’s concept of servants. As you’ll recall from previous columns [1, 2], CORBA objects are “abstract” entities defined by IDL interfaces. Likewise, servants are “concrete” implementations of COR...
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