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1

Energy and Deadline Constrained Robust Stochastic Static Resource Allocation  

E-print Network

Energy and Deadline Constrained Robust Stochastic Static Resource Allocation Mark A. Oxley1 of energy and deadline constrained static resource allocation where a collection of independent tasks ("bag of tasks stochastically. This research focuses on the design of energy-constrained resource allocation

Maciejewski, Anthony A.

2

Dynamic address allocation protocols for Mobile ad hoc networks  

E-print Network

Address allocation is an important issue in Mobile ad hoc networks. This thesis proposes solutions to assign unique IP addresses to nodes participating in Mobile ad hoc networks and evaluates the proposed solutions. Address allocation protocols...

Patchipulusu, Praveena

2001-01-01

3

Unexpected patterns of plastic energy allocation in stochastic environments.  

PubMed

When environmental conditions vary stochastically, individuals accrue fitness benefits by exhibiting phenotypic plasticity. Here we analyze a general dynamic-programming model describing an individual's optimal energy allocation in a stochastic environment. After maturation, individuals repeatedly decide how to allocate incoming energy between reproduction and maintenance. We analyze the optimal fraction of energy invested in reproduction and the resultant degree of plasticity in dependence on environmental variability and predictability. Our analyses reveal unexpected patterns of optimal energy allocation. When energy availability is low, all energy is allocated to reproduction, although this implies that individuals will not survive after reproduction. Above a certain threshold of energy availability, the optimal reproductive investment decreases to a minimum and even vanishes entirely in highly variable environments. With further improving energy availability, optimal reproductive investment gradually increases again. Costs of plasticity affect this allocation pattern only quantitatively. Our results show that optimal reproductive investment does not increase monotonically with growing energy availability and that small changes in energy availability can lead to major variations in optimal energy allocation. Our results help to unify two apparently opposing predictions from life-history theory, that organisms should increase reproductive investment both with improved environmental conditions and when conditions deteriorate ("terminal investment"). PMID:19196158

Fischer, Barbara; Taborsky, Barbara; Dieckmann, Ulf

2009-03-01

4

Stochastic optimisation of water allocation on a global scale  

NASA Astrophysics Data System (ADS)

Climate change, increasing population and further economic developments are expected to increase water scarcity for many regions of the world. Optimal water management strategies are required to minimise the water gap between water supply and domestic, industrial and agricultural water demand. A crucial aspect of water allocation is the spatial scale of optimisation. Blue water supply peaks at the upstream parts of large catchments, whereas demands are often largest at the industrialised downstream parts. Two extremes exist in water allocation: (i) 'First come, first serve,' which allows the upstream water demands to be fulfilled without considerations of downstream demands, and (ii) 'All for one, one for all' that satisfies water allocation over the whole catchment. In practice, water treaties govern intermediate solutions. The objective of this study is to determine the effect of these two end members on water allocation optimisation with respect to water scarcity. We conduct this study on a global scale with the year 2100 as temporal horizon. Water supply is calculated using the hydrological model PCR-GLOBWB, operating at a 5 arcminutes resolution and a daily time step. PCR-GLOBWB is forced with temperature and precipitation fields from the Hadgem2-ES global circulation model that participated in the latest coupled model intercomparison project (CMIP5). Water demands are calculated for representative concentration pathway 6.0 (RCP 6.0) and shared socio-economic pathway scenario 2 (SSP2). To enable the fast computation of the optimisation, we developed a hydrologically correct network of 1800 basin segments with an average size of 100 000 square kilometres. The maximum number of nodes in a network was 140 for the Amazon Basin. Water demands and supplies are aggregated to cubic kilometres per month per segment. A new open source implementation of the water allocation is developed for the stochastic optimisation of the water allocation. We apply a Genetic Algorithm for each segment to estimate the set of parameters that distribute the water supply for each node. We use the Python programming language and a flexible software architecture allowing to straightforwardly 1) exchange the process description for the nodes such that different water allocation schemes can be tested 2) exchange the objective function 3) apply the optimisation either to the whole catchment or to different sub-levels and 4) use multi-core CPUs concurrently and therefore reducing computation time. We demonstrate the application of the scientific workflow to the model outputs of PCR-GLOBWB and present first results on how water scarcity depends on the choice between the two extremes in water allocation.

Schmitz, Oliver; Straatsma, Menno; Karssenberg, Derek; Bierkens, Marc F. P.

2014-05-01

5

Stochastic does not equal ad hoc. [theories of lunar origin  

NASA Technical Reports Server (NTRS)

Some classes of influential events in solar system history are class-predictable but not event-predictable. Theories of lunar origin should not ignore class-predictable stochastic events. Impacts and close encounters with large objects during planet formation are class-predictable. These stochastic events, such as large impacts that triggered ejection of Earth-mantle material into a circum-Earth cloud, should not be rejected as ad hoc. A way to deal with such events scientifically is to investigate their consequences; if it can be shown that they might produce the Moon, they become viable concepts in theories of lunar origin.

Hartmann, W. K.

1984-01-01

6

A Novel Stochastic Clustering Auction for Task Allocation in Multi-Robot Teams  

E-print Network

A Novel Stochastic Clustering Auction for Task Allocation in Multi-Robot Teams Kai Zhang, Emmanuel communication links between robots that were motivated by a generic topology called a "scale free network." I. INTRODUCTION Auction methods are an effective approach to task allo- cation for heterogeneous robot teams

Barbu, Adrian

7

A Stochastic Clustering Auction (SCA) for Centralized and Distributed Task Allocation in  

E-print Network

A Stochastic Clustering Auction (SCA) for Centralized and Distributed Task Allocation in Multi-agent of heterogeneous robots or human-robot teams. It is well known that this problem is NP hard and hence of heterogeneous agents, for example, teams of heterogeneous robots or human-robot teams are expected

Collins, Emmanuel

8

A Stochasticity Threshold in Holography and and the Instability of AdS  

E-print Network

We give strong numerical evidence that a self-interacting probe scalar field in AdS, with only a few modes turned on initially, will undergo fast thermalization only if it is above a certain energetic threshold. Below the threshold the energy stays close to constant in a few modes for a very long time instead of cascading quickly. This indicates the existance of a Strong Stochasticity Threshold (SST) in holography. The idea of SST is familiar from certain statistical mechanical systems, and we suggest that it exists also in AdS gravity. This would naturally reconcile the generic non-linear instability of AdS observed by Bizon and Rostworowski, with the Fermi-Pasta-Ulam-Tsingou-like quasi-periodocity noticed recently for some classes of initial conditions. We show that our simple set-up captures many of the relevant features of the full gravity-scalar system.

Pallab Basu; Chethan Krishnan; Ayush Saurabh

2014-08-04

9

Online Resource Allocation Problems Patrick Jaillet  

E-print Network

and ad displays on-demand videos/movies kidney exchange programs 2 online optimization frameworkraft Online Resource Allocation Problems Patrick Jaillet Department of Electrical Engineering competitive analysis randomization and oblivious adversary stochastic information 3 basic online models online

Jaillet, Patrick

10

Channel allocation in OFDMA-based wireless ad-hoc networks  

NASA Astrophysics Data System (ADS)

Wireless ad hoc networks find great utility in situations where there is no wired base station infrastructure. For large networks wireless channel access needs to be performed in a distributed manner. Orthogonal Frequency Division Multiple Access (OFDMA) is an emerging multiple access technique that is used in several new networking technologies. In this paper we study the use of OFDMA for ad hoc networks. Each point-to-point link does not transmit over the entire band and uses a subset of the total number of available subcarriers. This enables flexible network resource management with the ability to vary the output link capacity depending on the traffic load. Specifically, we address the problem of subcarrier allocation for point-to-point links of ad hoc networks. We present a distributed algorithm for subcarrier allocation and compare its performance to a centralized graph-theoretic heuristic. The simulation results also show that our protocol is robust and scalable.

Kulkarni, Gautam; Raghunathan, Vijay; Srivastava, Mani B.; Gerla, Mario

2002-12-01

11

Mike Blaskiewicz C-AD 1 Stochastic Cooling for RHIC  

E-print Network

transfer impedance for one kicker M frequency bands with N kickers per band multi-slot kicker, length L For each kicker Total power Total voltage Each kicker should have a different center frequency. )(2 f-AD 4 Kicker Impedance for FNAL copy Need an efficient kicker structure. The FNAL Antiproton Accumulator

12

Mechanism Design for Stochastic Virtual Resource Allocation in Non-cooperative Cloud Systems  

Microsoft Academic Search

Currently, virtualization technology has been widely adopted by cloud service providers to provide flexible and cost- effective resource sharing among users. On cloud platforms, computing resources are allocated on-demand dynamically and the application hosted on a virtual machine(VM) usually has the illusion of complete control of resources. Thus, a selfish VM may strategically compete for resource with other VMs to

Zhen Kong; Cheng-Zhong Xu; Minyi Guo

2011-01-01

13

The Organization of Work in Social Insect Task Allocation as an Ad Hoc, Dynamical Network  

E-print Network

of colony behavior results in task allocation [1]. Colonies perform various tasks, such as foraging, care in harvester ants (Pogonomyrmex barbatus) [2]. In- side the nest, ants care for the brood (the preadult forms depend on numbers engaged in another [3,4]. Ants switch tasks, though not all transitions are possible

White, Douglas R.

14

Ad Serving Using a Compact Allocation Plan PEIJI CHEN, Yahoo! Labs  

E-print Network

of online display advertising is sold via guaranteed contracts: a publisher guarantees to the advertiser by the ad server during an ad call; they are small, using only O(1) space for contract; and are stateless and Principles]: General General Terms: Algorithms, Performance, Display Advertising Additional Key Words

Fiat, Amos

15

Intertemporal Cost Allocation and Managerial Investment Incentives: A Theory Explaining the Use of Economic Value Added as a Performance Measure  

Microsoft Academic Search

This paper provides a formal analysis of how managerial investment incentives are affected by alternative allocation rules when managerial compensation is based on accounting measures of income that include allocations for investment expenditures. The main result is that there exists a unique allocation rule that always induces the manager to choose the efficient investment level. The income measure created by

William P. Rogerson

1997-01-01

16

Investigation and incorporation of water inflow uncertainties through stochastic modelling in a combined optimisation methodology for water allocation in Alfeios River (Greece)  

NASA Astrophysics Data System (ADS)

The Alfeios River plays a vital role for Western Peloponnisos in Greece from natural, ecological, social and economic aspect. The main river and its six tributaries, forming the longest watercourse and the highest streamflow rate of Peloponnisose, represent a significant source of water supply for the region, aiming at delivering and satisfying the expected demands from a variety of water users, including irrigation, drinking water supply, hydropower production and recreation. In the previous EGU General Assembly, a fuzzy-boundary-interval linear programming methodology, based on Li et al. (2010) and Bekri et al. (2012), has been presented for optimal water allocation under uncertain and vague system conditions in the Alfeios River Basin. Uncertainties associated with the benefit and cost coefficient in the objective function of the main water uses (hydropower production and irrigation) were expressed as probability distributions and fuzzy boundary intervals derived by associated ?-cut levels. The uncertainty of the monthly water inflows was not incorporated in the previous initial application and the analysis of all other sources of uncertainty has been applied to two extreme hydrologic years represented by a selected wet and dry year. To manage and operate the river system, decision makers should be able to analyze and evaluate the impact of various hydrologic scenarios. In the present work, the critical uncertain parameter of water inflows is analyzed and its incorporation as an additional type of uncertainty in the suggested methodology is investigated, in order to enable the assessment of optimal water allocation for hydrologic and socio-economic scenarios based both on historical data and projected climate change conditions. For this purpose, stochastic simulation analysis for a part of the Alfeios river system is undertaken, testing various stochastic models from simple stationary ones (AR and ARMA), Thomas-Fiering, ARIMA as well as more sophisticated and complete such as CASTALIA. A short description and comparison of their assumptions, the differences between them and the presentation of the results are included. Li, Y.P., Huang, G.H. and S.L., Nie, (2010), Planning water resources management systems using a fuzzy boundary interval-stochastic programming method, Elsevier Ltd, Advances in Water Resources, 33: 1105-1117. doi:10.1016/j.advwatres.2010.06.015 Bekri, E.S., Disse, M. and P.C.,Yannopoulos, (2012), Methodological framework for correction of quick river discharge measurements using quality characteristics, Session of Environmental Hydraulics - Hydrodynamics, 2nd Common Conference of Hellenic Hydrotechnical Association and Greek Committee for Water Resources Management, Volume: 546-557 (in Greek).

Bekri, Eleni; Yannopoulos, Panayotis; Disse, Markus

2014-05-01

17

A framework for addressing stochastic and combinatorial aspects of scheduling and resource allocation in pharmaceutical R&D pipelines  

Microsoft Academic Search

Managing a pharmaceutical R&D pipeline is a complex undertaking that involves an inter-play of strategic and tactical decision-making around portfolio selection, activity scheduling and resource allocation across multiple projects along a multi-year scope. In this paper we focus on improving the quality of pharmaceutical resource management decisions and practices. Pharmaceutical resource management is broadly comprised of decisions relating to scheduling

Vishal A. Varma; Joseph F. Pekny; Gary E. Blau; Gintaras V. Reklaitis

2008-01-01

18

Risk allocation strategies for distributed chance-constrained task allocation  

E-print Network

This paper addresses the issue of allocating risk amongst agents in distributed chance-constrained planning algorithms. Building on previous research that extended chance-constrained planning to stochastic multi-agent ...

Ponda, Sameera S.

19

UNIVERSITY SPACE POLICY ALLOCATION OF UNIVERSITY SPACE  

E-print Network

. Hereto, space has usually been allocated in an ad hoc manner on a long term basis without periodic reviewUNIVERSITY COLLEGE DUBLIN UNIVERSITY SPACE POLICY #12;ALLOCATION OF UNIVERSITY SPACE I Purpose To provide a methodology for the allocation of space across the University II Background Due

20

Optimal Allocation of Construction Planning Resources  

Microsoft Academic Search

Efficient allocation of resources for construction planning activities requires construction planning resource requirements to be determined on a cost-effective and value-adding basis. However, although some research studies have indicated that increasing resource allocations to construction planning activities will lead to improved project performance, other research studies have indicated that investing in construction planning beyond an optimum point will lead to

Olusegun O. Faniran; Peter E. D. Love; Heng Li

1999-01-01

21

Optimal Allocation of Work in Assembly Systems  

Microsoft Academic Search

We investigate how to allocate work in stochastic assembly systems so as to maximize throughput. We use Markov models for systems with exponential processing times and simulation-based methods for other probability distributions. We find that assembly systems should be unbalanced in the direction of assigning less work to assembly and more to component stations. We also find that greater parallelism

Kenneth R. Baker; Stephen G. Powell; David F. Pyke

1993-01-01

22

Allocating online advertisement space with unreliable estimates Mohammad Mahdian  

E-print Network

Allocating online advertisement space with unreliable estimates Mohammad Mahdian Yahoo! Research the bids and the budgets of advertisers. As a search query arrives, the ad space is allocated University saberi@stanford.edu Abstract We study the problem of optimally allocating online advertisement

Saberi, Amin

23

Ownership % Allocation Share % CONCENTRATION OF ALLOCATION OWNERSHIP  

E-print Network

.029 Ownership % Allocation Share % CONCENTRATION OF ALLOCATION OWNERSHIP 57Total SURF CLAM Allocation owners C528 C567 Singer Island Ventures Inc MYERS CLAM COMPANY IN First Pioneer Farm Credit, ACA Wachovia.L.C. KRISTY LEE CLAM CO 1ST PIONEER F.B.O. JM & MT Sturdy Savings Bank (OB) Wachovia Bank NA - ITF GEORGE

24

Informative allocation and consistent treatment selection Tamas Rudas  

E-print Network

the odds ratio (cross product ratio). Such decisions do not depend on the allocation of the observations based on the value of the odds ratio (Rudas, 1998) or cross product ratio (cpr) a/b c/d = ad bc based on the cross sum ratio is investigated. This procedure is not only sensitive to allocation

Rudas, Tamas

25

Allocating online advertisement space with unreliable estimates  

Microsoft Academic Search

We study the problem of optimally allocating online ad- vertisement space to budget-constrained advertisers. This problem was defined and studied from the perspective of worst-case online competitive analysis by Mehta et al. Our objective is to find an algorithm that takes advantage of the given estimates of the frequencies of keywords to com- pute a near optimal solution when the

Mohammad Mahdian; Hamid Nazerzadeh; Amin Saberi

2007-01-01

26

Resource Allocation With Non-Deterministic Demands and Profits  

E-print Network

Resource Allocation With Non-Deterministic Demands and Profits Nan Hu, Diego Pizzocaro, Matthew P is selected with the goal of maximizing total profit. Besides, because of uncertain factors like unreliable and profits of tasks are deterministic and known a priori, both of which may be stochastic following certain

Preece, Alun

27

The allocative efficiency implications of water pollution abatement cost comparisons  

Microsoft Academic Search

Assessments of the efficiency of water pollution control allocations are usually based on abatement cost comparisons. The general rule is that efficiency is improved by reallocating abatement from sources with high marginal costs to low-cost sources. The welfare-theoretic foundation of this rule is well established for situations with nonstochastic emissions. In situations with stochastic emissions, pollution control involves improving the

James S. Shortle

1990-01-01

28

A Stochastic Programming Based Approach to  

E-print Network

-to-Order (ATO) inventory system ·The inventory control problem ·The stochastic programming (SP) based approach Review) ATO Inventory Control Problem ·We want to choose a replenishment policy and an allocation policy', formulating the ATO inventory control problem as a Markov decision process (MDP) would require an enormous

29

UPDATE SPATIAL ALLOCATION FILES  

EPA Science Inventory

SMOKE-ready and EMS-HAP-ready spatial allocation files that can be used to allocate 1999 emissions and their derivatives (e.g., 1999 NEI and 2001 modeling platform) from the county level to modeling grid cells (36, 12 and 4 kilometer) and to census tracts....

30

Stochastic resonance in electrical circuits. I. Conventional stochastic resonance  

Microsoft Academic Search

Stochastic resonance (SR), a phenomenon in which a periodic signal in a nonlinear system can be amplified by added noise, is introduced and discussed. Techniques for investigating SR using electronic circuits are described in practical terms. The physical nature of SR, and the explanation of weak-noise SR as a linear response phenomenon, are considered. Conventional SR, for systems characterized by

Dmitrii G. Luchinsky; Riccardo Mannella; Peter V. E. McClintock; Nigel G. Stocks

1999-01-01

31

The Allocative Efficiency Implications of Water Pollution Abatement Cost Comparisons  

NASA Astrophysics Data System (ADS)

Assessments of the efficiency of water pollution control allocations are usually based on abatement cost comparisons. The general rule is that efficiency is improved by reallocating abatement from sources with high marginal costs to low-cost sources. The welfare-theoretic foundation of this rule is well established for situations with nonstochastic emissions. In situations with stochastic emissions, pollution control involves improving the distribution of emissions. Nevertheless, efficiency analyses involving stochastic emissions usually sidestep formal consideration of the stochastic element by measuring pollution control and control costs with respect to changes in long-term average flows. An economic model of stochastic emissions is used to demonstrate that this approach can give misleading results. An alternative procedure is briefly discussed.

Shortle, James S.

1990-05-01

32

Stochastic Programming Approach to Hydraulic Fracture Design for the Lower Tertiary Gulf of Mexico  

E-print Network

.......................................................................................... 1 Deep-water Lower Tertiary Background ............................................. 3 Research Objectives ............................................................................. 7 Literature Review... ....................................... 47 Finite Conductivity Fracture Approximation ..................................... 52 Proppant Allocation in Multilayer Reservoirs .................................... 53 vi IV STOCHASTIC OPTIMIZATION...

Podhoretz, Seth

2013-07-27

33

Advertisement allocation for generalized second-pricing schemes  

Microsoft Academic Search

Recently, there has been a surge of interest in algorithms that allocate advertisement space in an online revenue-competitive manner. Most such algorithms, however, assume a pay-as-you-bid pricing scheme. In this paper, we study the query allocation problem where the ad space is priced using the well-known and widely-used generalized second price (GSP) scheme. We observe that the previous algorithms fail

Ashish Goel; Mohammad Mahdian; Hamid Nazerzadeh; Amin Saberi

2010-01-01

34

Stochastic thermodynamics  

NASA Astrophysics Data System (ADS)

'Stochastic thermodynamics as a conceptual framework combines the stochastic energetics approach introduced a decade ago by Sekimoto [1] with the idea that entropy can consistently be assigned to a single fluctuating trajectory [2]'. This quote, taken from Udo Seifert's [3] 2008 review, nicely summarizes the basic ideas behind stochastic thermodynamics: for small systems, driven by external forces and in contact with a heat bath at a well-defined temperature, stochastic energetics [4] defines the exchanged work and heat along a single fluctuating trajectory and connects them to changes in the internal (system) energy by an energy balance analogous to the first law of thermodynamics. Additionally, providing a consistent definition of trajectory-wise entropy production gives rise to second-law-like relations and forms the basis for a 'stochastic thermodynamics' along individual fluctuating trajectories. In order to construct meaningful concepts of work, heat and entropy production for single trajectories, their definitions are based on the stochastic equations of motion modeling the physical system of interest. Because of this, they are valid even for systems that are prevented from equilibrating with the thermal environment by external driving forces (or other sources of non-equilibrium). In that way, the central notions of equilibrium thermodynamics, such as heat, work and entropy, are consistently extended to the non-equilibrium realm. In the (non-equilibrium) ensemble, the trajectory-wise quantities acquire distributions. General statements derived within stochastic thermodynamics typically refer to properties of these distributions, and are valid in the non-equilibrium regime even beyond the linear response. The extension of statistical mechanics and of exact thermodynamic statements to the non-equilibrium realm has been discussed from the early days of statistical mechanics more than 100 years ago. This debate culminated in the development of linear response theory for small deviations from equilibrium, in which a general framework is constructed from the analysis of non-equilibrium states close to equilibrium. In a next step, Prigogine and others developed linear irreversible thermodynamics, which establishes relations between transport coefficients and entropy production on a phenomenological level in terms of thermodynamic forces and fluxes. However, beyond the realm of linear response no general theoretical results were available for quite a long time. This situation has changed drastically over the last 20 years with the development of stochastic thermodynamics, revealing that the range of validity of thermodynamic statements can indeed be extended deep into the non-equilibrium regime. Early developments in that direction trace back to the observations of symmetry relations between the probabilities for entropy production and entropy annihilation in non-equilibrium steady states [5-8] (nowadays categorized in the class of so-called detailed fluctuation theorems), and the derivations of the Bochkov-Kuzovlev [9, 10] and Jarzynski relations [11] (which are now classified as so-called integral fluctuation theorems). Apart from its fundamental theoretical interest, the developments in stochastic thermodynamics have experienced an additional boost from the recent experimental progress in fabricating, manipulating, controlling and observing systems on the micro- and nano-scale. These advances are not only of formidable use for probing and monitoring biological processes on the cellular, sub-cellular and molecular level, but even include the realization of a microscopic thermodynamic heat engine [12] or the experimental verification of Landauer's principle in a colloidal system [13]. The scientific program Stochastic Thermodynamics held between 4 and 15 March 2013, and hosted by The Nordic Institute for Theoretical Physics (Nordita), was attended by more than 50 scientists from the Nordic countries and elsewhere, amongst them many leading experts in the field. During the program, the most recent developments, open quest

Eichhorn, Ralf; Aurell, Erik

2014-04-01

35

Sensory Optimization by Stochastic Tuning  

PubMed Central

Individually, visual neurons are each selective for several aspects of stimulation, such as stimulus location, frequency content, and speed. Collectively, the neurons implement the visual systems preferential sensitivity to some stimuli over others, manifested in behavioral sensitivity functions. We ask how the individual neurons are coordinated to optimize visual sensitivity. We model synaptic plasticity in a generic neural circuit, and find that stochastic changes in strengths of synaptic connections entail fluctuations in parameters of neural receptive fields. The fluctuations correlate with uncertainty of sensory measurement in individual neurons: the higher the uncertainty the larger the amplitude of fluctuation. We show that this simple relationship is sufficient for the stochastic fluctuations to steer sensitivities of neurons toward a characteristic distribution, from which follows a sensitivity function observed in human psychophysics, and which is predicted by a theory of optimal allocation of receptive fields. The optimal allocation arises in our simulations without supervision or feedback about system performance and independently of coupling between neurons, making the system highly adaptive and sensitive to prevailing stimulation. PMID:24219849

Jurica, Peter; Gepshtein, Sergei; Tyukin, Ivan; van Leeuwen, Cees

2013-01-01

36

Added Sugars  

MedlinePLUS

... dont need sugar to function properly. Added sugars contribute zero nutrients but many added calories that can lead to extra pounds or even obesity, thereby reducing heart health. If you think of ...

37

Stochastic resonance in electrical circuits. II. Nonconventional stochastic resonance  

Microsoft Academic Search

For pt.I see ibid., vol.46, no.9, pp.1205-14 (1999). Stochastic resonance (SR), in which a periodic signal in a nonlinear system can be amplified by added noise, is discussed. The application of circuit modeling techniques to the conventional form of SR, which occurs in static bistable potentials, was considered in a companion paper. Here, the investigation of nonconventional forms of SR

Dmitrii G. Luchinsky; Riccardo Mannella; Peter V. E. McClintock; Nigel G. Stocks

1999-01-01

38

Channel Allocation Problem Mathematical Preliminaries  

E-print Network

Channel Allocation Problem Mathematical Preliminaries Multiple Access Protocols Ethernet Medium #12;Channel Allocation Problem Mathematical Preliminaries Multiple Access Protocols Ethernet Outline 1 Multiple Access Protocols ALOHA Slotted ALOHA CSMA 4 Ethernet CSMA-CD in Ethernet Binary Exponential

Ramkumar, Mahalingam

39

Channel Allocation Problem Mathematical Preliminaries  

E-print Network

Channel Allocation Problem Mathematical Preliminaries Multiple Access Protocols Ethernet Medium Channel Allocation Problem Mathematical Preliminaries Multiple Access Protocols Ethernet Outline 1 Channel Access Protocols ALOHA Slotted ALOHA CSMA 4 Ethernet CSMA-CD in Ethernet Binary Exponential Backoff

Ramkumar, Mahalingam

40

Aid allocation and poverty reduction  

Microsoft Academic Search

This paper derives a poverty-efficient allocation of aid and compares it with actual aid allocations. The allocation of aid that has the maximum effect on poverty depends on the level of poverty and the quality of policies. Using the headcount, poverty-gap, and squared poverty gap measures of poverty, alternatively, all yield similar poverty-efficient allocations. Finally, we find that the actual

Paul Collier; David Dollar

2002-01-01

41

Synaptic Tagging During Memory Allocation  

PubMed Central

There is now compelling evidence that the allocation of memory to specific neurons (neuronal allocation) and synapses (synaptic allocation) in a neurocircuit is not random and that instead specific mechanisms, such as increases in neuronal excitability and synaptic tagging and capture, determine the exact sites where memories are stored. We propose an integrated view of these processes, such that neuronal allocation, synaptic tagging and capture, spine clustering and metaplasticity reflect related aspects of memory allocation mechanisms. Importantly, the properties of these mechanisms suggest a set of rules that profoundly affect how memories are stored and recalled. PMID:24496410

Rogerson, Thomas; Cai, Denise; Frank, Adam; Sano, Yoshitake; Shobe, Justin; Aranda, Manuel L.; Silva, Alcino J.

2014-01-01

42

A Hopfield neural-network-based dynamic channel allocation with handoff channel reservation control  

Microsoft Academic Search

As channel allocation schemes become more complex and computationally demanding in cellular radio networks, alternative computational models that provide the means for faster processing time are becoming the topic of research interest. These computational models include knowledge-based algorithms, neural networks, and stochastic search techniques. This paper is concerned with the application of a Hopfield (1982) neural network (HNN) to dynamic

Oscar Lzaro; Demessie Girma

2000-01-01

43

Allocations for HANDI 2000 business management system  

SciTech Connect

The Data Integration 2000 Project will result in an integrated and comprehensive set of functional applications containing core information necessary to support the Project Hanford Management Contract. It is based on the Commercial-Off-The-Shelf product solution with commercially proven business processes. The COTS product solution set, of PassPort and People Soft software, supports finance, supply and chemical management/Material Safety Data Sheet, human resources. Allocations at Fluor Daniel Hanford are burdens added to base costs using a predetermined rate.

Wilson, D.

1998-08-24

44

Stochastic Cooling  

SciTech Connect

Stochastic Cooling was invented by Simon van der Meer and was demonstrated at the CERN ISR and ICE (Initial Cooling Experiment). Operational systems were developed at Fermilab and CERN. A complete theory of cooling of unbunched beams was developed, and was applied at CERN and Fermilab. Several new and existing rings employ coasting beam cooling. Bunched beam cooling was demonstrated in ICE and has been observed in several rings designed for coasting beam cooling. High energy bunched beams have proven more difficult. Signal suppression was achieved in the Tevatron, though operational cooling was not pursued at Fermilab. Longitudinal cooling was achieved in the RHIC collider. More recently a vertical cooling system in RHIC cooled both transverse dimensions via betatron coupling.

Blaskiewicz, M.

2011-01-01

45

Adding Fractions  

NSDL National Science Digital Library

In this web-based tutorial, students learn procedures for adding fractions with like and unlike denominators. The tutorial includes visual representations of the problems using pizzas, animations of the algorithm, and links to related lessons, worksheets, and practice problems.

Website, Math I.

2011-09-23

46

3739SPACE ALLOCATION/RE-ALLOCATION PROCEDURE Client identifies  

E-print Network

Page 1 3739SPACE ALLOCATION/RE-ALLOCATION PROCEDURE Client identifies space requirement Client completes space request form Submit space request form to Space Management Office Space Management Office acknowledge receipt Is space form completed accurately Is there vacant space Space Management Office conduct

47

Computationally efficient control allocation  

NASA Technical Reports Server (NTRS)

A computationally efficient method for calculating near-optimal solutions to the three-objective, linear control allocation problem is disclosed. The control allocation problem is that of distributing the effort of redundant control effectors to achieve some desired set of objectives. The problem is deemed linear if control effectiveness is affine with respect to the individual control effectors. The optimal solution is that which exploits the collective maximum capability of the effectors within their individual physical limits. Computational efficiency is measured by the number of floating-point operations required for solution. The method presented returned optimal solutions in more than 90% of the cases examined; non-optimal solutions returned by the method were typically much less than 1% different from optimal and the errors tended to become smaller than 0.01% as the number of controls was increased. The magnitude of the errors returned by the present method was much smaller than those that resulted from either pseudo inverse or cascaded generalized inverse solutions. The computational complexity of the method presented varied linearly with increasing numbers of controls; the number of required floating point operations increased from 5.5 i, to seven times faster than did the minimum-norm solution (the pseudoinverse), and at about the same rate as did the cascaded generalized inverse solution. The computational requirements of the method presented were much better than that of previously described facet-searching methods which increase in proportion to the square of the number of controls.

Durham, Wayne (Inventor)

2001-01-01

48

Modeling carbon allocation in trees: a search for principles.  

PubMed

We review approaches to predicting carbon and nitrogen allocation in forest models in terms of their underlying assumptions and their resulting strengths and limitations. Empirical and allometric methods are easily developed and computationally efficient, but lack the power of evolution-based approaches to explain and predict multifaceted effects of environmental variability and climate change. In evolution-based methods, allocation is usually determined by maximization of a fitness proxy, either in a fixed environment, which we call optimal response (OR) models, or including the feedback of an individual's strategy on its environment (game-theoretical optimization, GTO). Optimal response models can predict allocation in single trees and stands when there is significant competition only for one resource. Game-theoretical optimization can be used to account for additional dimensions of competition, e.g., when strong root competition boosts root allocation at the expense of wood production. However, we demonstrate that an OR model predicts similar allocation to a GTO model under the root-competitive conditions reported in free-air carbon dioxide enrichment (FACE) experiments. The most evolutionarily realistic approach is adaptive dynamics (AD) where the allocation strategy arises from eco-evolutionary dynamics of populations instead of a fitness proxy. We also discuss emerging entropy-based approaches that offer an alternative thermodynamic perspective on allocation, in which fitness proxies are replaced by entropy or entropy production. To help develop allocation models further, the value of wide-ranging datasets, such as FLUXNET, could be greatly enhanced by ancillary measurements of driving variables, such as water and soil nitrogen availability. PMID:22278378

Franklin, Oskar; Johansson, Jacob; Dewar, Roderick C; Dieckmann, Ulf; McMurtrie, Ross E; Brnnstrm, Ake; Dybzinski, Ray

2012-06-01

49

Scale interactions and their implication for stochastic parameterization (Invited)  

NASA Astrophysics Data System (ADS)

One critical question encountered in designing a stochastic parameterization is how to relate the stochastic forcing and parameters in the parameterization, that represent the unresolved variables, to resolved variables. Often an ad hoc relation, for instance the polynomial regressions considered by Wilks (2005), is used. The regression coefficients as well as the stochastic forcing are estimated by fitting the relation into the diagnosed unresolved tendencies in grid point domain. Another approach is to quantify various types of scale interactions in spectral domain and design stochastic paramterization based on these interactions. Here we consider scale interactions resulting from non-linear advection terms in spectral domain and quantify interactions among neighboring scales (in line with the idea of energy/enstrophy cascade) and interactions with remote scales (inspired by the concept of stochastic climate models), and discuss their implications for stochastic parameterization.

von Storch, J.

2013-12-01

50

Capacity Allocation Under Noncooperative Routing  

Microsoft Academic Search

The capacity allocation problem in a network that is to be shared by noncooperative users is considered. Each user decides independently upon its routing strategy so as to optimize its individual performance objective. The operating points of the network are the Nash equilibria of the underlying routing game. The network designer aims to allocate link capacities, so that the resulting

Yannis A. Korilis; Aurel A. Lazar; Ariel Orda

1995-01-01

51

Stochastic gene expression with delay.  

PubMed

The expression of genes usually follows a two-step procedure. First, a gene (encoded in the genome) is transcribed resulting in a strand of (messenger) RNA. Afterwards, the RNA is translated into protein. We extend the classical stochastic jump model by adding delays (with arbitrary distributions) to transcription and translation. Already in the classical model, production of RNA and protein comes in bursts by activation and deactivation of the gene, resulting in a large variance of the number of RNA and proteins in equilibrium. We derive precise formulas for this second-order structure with the model including delay in equilibrium. PMID:25285895

Jansen, Martin; Pfaffelhuber, Peter

2015-01-01

52

Bayesian sensor resource allocation  

NASA Astrophysics Data System (ADS)

Many tracking and guidance problems may be formulated as a terminating stochastic game in which the distribution of outcomes is affected by the intermediate actions. Traditional technique ignore this interaction. In this paper we develop an information gathering strategy which maximizes the expected gain of the outcome. For example, the objective could be a function of the terminal miss distance and target identify with penalties for missing a valid target or attacking a friendly one. Several trade-offs are addressed: the increased information available from taking more measurements, the fact that an increased number of measurement may adversely affect change of success and the fact that later measurements may be more informative but also may be of little use since there my not be enough time available for reaction to this extra information. The problem is formulated so that we are required to choose, under uncertainty, an alternative from a set of possible decisions. This set has a discrete uncertainty as to the number of measurements to be taken and a continuous uncertainty as to where and when the measurements should be taken. Preferences over consequences are modeled with a utility function. We propose to choose as optimal the alternative which maximizes expected utility. A simulation based approximation to the solution of this stochastic optimization problem is outlined. This relies on recent developments in dimensions swapping Markov Chain Monte Carlo (MCMC) techniques. The use of MCMC methodology allow us to explore the expected utility surface and thus select a measurement strategy. The resulting algorithm is demonstrated on a simple guidance problem.

Gordon, Neil J.; Bedworth, Mark D.

1998-09-01

53

Stochastic cooling in RHIC  

SciTech Connect

After the success of longitudinal stochastic cooling of bunched heavy ion beam in RHIC, transverse stochastic cooling in the vertical plane of Yellow ring was installed and is being commissioned with proton beam. This report presents the status of the effort and gives an estimate, based on simulation, of the RHIC luminosity with stochastic cooling in all planes.

Brennan,J.M.; Blaskiewicz, M. M.; Severino, F.

2009-05-04

54

Resource allocation using risk analysis  

SciTech Connect

Allocating limited resources among competing priorities is an important problem in management. In this paper we describe an approach to resource allocation using risk as a metric. We call this approach the Logic-Evolved Decision (LED) approach because we use logic-models to generate an exhaustive set of competing options and to describe the often highly complex model used for evaluating the risk reduction achieved by different resource allocations among these options. The risk evaluation then proceeds using probabilistic or linguistic input data.

Bott, T. F. (Terrence F.); Eisenhawer, S. W. (Stephen W.)

2003-01-01

55

Zinc allocation and re-allocation in rice  

PubMed Central

Aims: Agronomy and breeding actively search for options to enhance cereal grain Zn density. Quantifying internal (re-)allocation of Zn as affected by soil and crop management or genotype is crucial. We present experiments supporting the development of a conceptual model of whole plant Zn allocation and re-allocation in rice. Methods: Two solution culture experiments using 70Zn applications at different times during crop development and an experiment on within-grain distribution of Zn are reported. In addition, results from two earlier published experiments are re-analyzed and re-interpreted. Results: A budget analysis showed that plant zinc accumulation during grain filling was larger than zinc allocation to the grains. Isotope data showed that zinc taken up during grain filling was only partly transported directly to the grains and partly allocated to the leaves. Zinc taken up during grain filling and allocated to the leaves replaced zinc re-allocated from leaves to grains. Within the grains, no major transport barrier was observed between vascular tissue and endosperm. At low tissue Zn concentrations, rice plants maintained concentrations of about 20 mg Zn kg?1 dry matter in leaf blades and reproductive tissues, but let Zn concentrations in stems, sheath, and roots drop below this level. When plant zinc concentrations increased, Zn levels in leaf blades and reproductive tissues only showed a moderate increase while Zn levels in stems, roots, and sheaths increased much more and in that order. Conclusions: In rice, the major barrier to enhanced zinc allocation towards grains is between stem and reproductive tissues. Enhancing root to shoot transfer will not contribute proportionally to grain zinc enhancement. PMID:24478788

Stomph, Tjeerd Jan; Jiang, Wen; Van Der Putten, Peter E. L.; Struik, Paul C.

2014-01-01

56

Roadway Improvement Project Cost Allocation  

E-print Network

Roadway Improvement Project Cost Allocation CTS 21st Annual Transportation Research Conference costs #12;Potential Applications · Roadway Project Feasibility Studies ­ Identified potential roadway infrastructure improvement ­ Documentation of estimated project costs ­ Determine property assessments

Minnesota, University of

57

Spinning AdS Propagators  

E-print Network

We develop the embedding formalism to describe symmetric traceless tensors in Anti-de Sitter space. We use this formalism to construct the bulk-to-bulk propagator of massive spin J fields and check that it has the expected short distance and massless limits. We also and a split representation for the bulk-to-bulk propagator, by writing it as an integral over the boundary of the product of two bulk-to-boundary propagators. We exemplify the use of this representation with the computation of the conformal partial wave decomposition of Witten diagrams. In particular, we determine the Mellin amplitude associated to AdS graviton exchange between minimally coupled scalars of general dimension, including the regular part of the amplitude.

Costa, Miguel S; Penedones, Joao

2014-01-01

58

Conference structures and fair allocation rules  

Microsoft Academic Search

To describe how the outcome of a cooperative game might depend on which groups of players hold cooperative planning conferences, we study allocation rules, which are functions mapping conference structures to payoff allocations. An allocation rule is fair if every conference always gives equal benefits to all its members. Any characteristic function game without sidepayments has a unique fair allocation

R. B. Myerson

1980-01-01

59

Technical, allocative and economic efficiencies in swine production in Hawaii: a comparison of parametric and nonparametric approaches  

Microsoft Academic Search

Technical, allocative and economic efficiency measures are derived for a sample of swine producers in Hawaii using the parametric stochastic efficiency decomposition technique and nonparametric data envelopment analysis (DEA). Efficiency measures obtained from the two frontier approaches are compared. Firm-specific factors affecting productive efficiencies are also analyzed. Finally, swine producers' potential for reducing cost through improved efficiency is also examined.

Khem R. Sharma; PingSun Leung; Halina M. Zaleski

1999-01-01

60

Dynamic slot allocation (DSA) in indoor SDMA\\/TDMA using smart antenna basestation  

Microsoft Academic Search

In this paper, we introduce and study the use of dynamic slot allocation (DSA) in packet-switched space-divi- sion-multiple-access (SDMA) systems. In conventional SDMA, a smart antenna is used at the basestation to simultaneously communicate with multiple stations on the same frequency channel. When dynamic slot allocation is added, the basestation uses uplink channel measurements to intelligently construct future SDMA\\/TDMA frames.

Faisal Shad; Terence D. Todd; Vytas Kezys; John Litva

2001-01-01

61

Stochastic Approximation Approach to Stochastic Programming  

E-print Network

Monte Carlo sampling techniques, namely, the Stochastic Approximation (SA) and the Sample. Average ... than 5. The aim of this paper is to compare two computational approaches based on Monte. Carlo sampling ..... does not exceed M2.

2007-10-03

62

When to store energy in a stochastic environment.  

PubMed

The ability to store energy enables organisms to deal with temporarily harsh and uncertain conditions. Empirical studies have demonstrated that organisms adapted to fluctuating energy availability plastically adjust their storage strategies. So far, however, theoretical studies have investigated general storage strategies only in constant or deterministically varying environments. In this study, we analyze how the ability to store energy influences optimal energy allocation to storage, reproduction, and maintenance in environments in which energy availability varies stochastically. We find that allocation to storage is evolutionarily optimal when environmental energy availability is intermediate and energy stores are not yet too full. In environments with low variability and low predictability of energy availability, it is not optimal to store energy. As environments become more variable or more predictable, energy allocation to storage is increasingly favored. By varying environmental variability, environmental predictability, and the cost of survival, we obtain a variety of different optimal life-history strategies, from highly iteroparous to semelparous, which differ significantly in their storage patterns. Our results demonstrate that in a stochastically varying environment simultaneous allocation to reproduction, maintenance, and storage can be optimal, which contrasts with previous findings obtained for deterministic environments. PMID:21108636

Fischer, Barbara; Dieckmann, Ulf; Taborsky, Barbara

2011-05-01

63

Experimental evidence of a risk-sensitive reproductive allocation in a long-lived mammal.  

PubMed

When reproduction competes with the amount of resources available for survival during an unpredictable nonbreeding season, individuals should adopt a risk-sensitive regulation of their reproductive allocation. We tested this hypothesis on female reindeer (Rangifer tarandus), which face a trade-off between reproduction and acquisition of body reserves during spring and summer, with autumn body mass functioning as insurance against stochastic winter climatic severity. The study was conducted in a population consisting of two herds: one that received supplementary winter feeding for four years while the other utilized natural pastures. The females receiving additional forage allocated more to their calves. Experimental translocation of females between the herds was conducted to simulate two contrasting rapid alterations of winter conditions. When females receiving supplementary feeding were moved to natural pastures, they promptly reduced their reproductive allocation the following summer. However, when winter conditions were improved, females were reluctant to increase their reproductive allocation. This asymmetric response to improved vs. reduced winter conditions is consistent with a risk-averse adjustment in reproductive allocation. The ability of individuals to track their environment and the concordant risk-sensitive adjustment of reproductive allocation may render subarctic reindeer more resilient to climate change than previously supposed. PMID:18459345

Brdsen, Bard-Jrgen; Fauchald, Per; Tveraa, Torkild; Langeland, Knut; Yoccoz, Nigel Gilles; Ims, Rolf Anker

2008-03-01

64

Collective credit allocation in science.  

PubMed

Collaboration among researchers is an essential component of the modern scientific enterprise, playing a particularly important role in multidisciplinary research. However, we continue to wrestle with allocating credit to the coauthors of publications with multiple authors, because the relative contribution of each author is difficult to determine. At the same time, the scientific community runs an informal field-dependent credit allocation process that assigns credit in a collective fashion to each work. Here we develop a credit allocation algorithm that captures the coauthors' contribution to a publication as perceived by the scientific community, reproducing the informal collective credit allocation of science. We validate the method by identifying the authors of Nobel-winning papers that are credited for the discovery, independent of their positions in the author list. The method can also compare the relative impact of researchers working in the same field, even if they did not publish together. The ability to accurately measure the relative credit of researchers could affect many aspects of credit allocation in science, potentially impacting hiring, funding, and promotion decisions. PMID:25114238

Shen, Hua-Wei; Barabsi, Albert-Lszl

2014-08-26

65

Task allocation among multiple intelligent robots  

NASA Technical Reports Server (NTRS)

Researchers describe the design of a decentralized mechanism for allocating assembly tasks in a multiple robot assembly workstation. Currently, the approach focuses on distributed allocation to explore its feasibility and its potential for adaptability to changing circumstances, rather than for optimizing throughput. Individual greedy robots make their own local allocation decisions using both dynamic allocation policies which propagate through a network of allocation goals, and local static and dynamic constraints describing which robots are elibible for which assembly tasks. Global coherence is achieved by proper weighting of allocation pressures propagating through the assembly plan. Deadlock avoidance and synchronization is achieved using periodic reassessments of local allocation decisions, ageing of allocation goals, and short-term allocation locks on goals.

Gasser, L.; Bekey, G.

1987-01-01

66

Stochastic String Motion Above and Below the World Sheet Horizon  

E-print Network

We study the stochastic motion of a relativistic trailing string in black hole AdS_5. The classical string solution develops a world-sheet horizon and we determine the associated Hawking radiation spectrum. The emitted radiation causes fluctuations on the string both above and below the world-sheet horizon. In contrast to standard black hole physics, the fluctuations below the horizon are causally connected with the boundary of AdS. We derive a bulk stochastic equation of motion for the dual string and use the AdS/CFT correspondence to determine the evolution a fast heavy quark in the strongly coupled $\\N=4$ plasma. We find that the kinetic mass of the quark decreases by $\\Delta M=-\\sqrt{\\gamma \\lambda}T/2$ while the correlation time of world sheet fluctuations increases by $\\sqrt{\\gamma}$.

Jorge Casalderrey-Solana; Keun-Young Kim; Derek Teaney

2010-03-31

67

Dynamic-Programming Approximations for Stochastic Time-Staged Integer Multicommodity-Flow Problems  

Microsoft Academic Search

In this paper, we consider a stochastic and time dependent version of the min-cost integer multi- commodity flow problem that arises in the dynamic resource allocation context. In this problem class, tasks arriving over time have to be covered by a set of indivisible and reusable resources of dierent types. The assignment of a resource to a task removes the

Huseyin Topaloglu; Warren B. Powell

2006-01-01

68

Instantaneous stochastic perturbation theory  

E-print Network

A form of stochastic perturbation theory is described, where the representative stochastic fields are generated instantaneously rather than through a Markov process. The correctness of the procedure is established to all orders of the expansion and for a wide class of field theories that includes all common formulations of lattice QCD.

Martin Lscher

2014-12-17

69

Succession Model Landscape Stochasticity  

E-print Network

100 1000 10000 patch sizes birth rate both Disturbance Model Landscape Stochasticity Low Control High" accomplished by incrementing the patch birth rate (Control: s = a = 10) A simple model of species viabilitySuccession Model Landscape Stochasticity Low Control High Very High ThresholdMultiplier 0.1 1 10

70

518 IEEE TRANSACTIONS ON ROBOTICS, VOL. 26, NO. 3, JUNE 2010 Stochastic Modular Robotic Systems  

E-print Network

518 IEEE TRANSACTIONS ON ROBOTICS, VOL. 26, NO. 3, JUNE 2010 Stochastic Modular Robotic Systems, Member, IEEE, David Erickson, and Hod Lipson, Member, IEEE Abstract--Modular robotic systems typically. By contrast, stochastic modular robots take ad- vantage of ambient environmental energy for the transportation

Erickson, David

71

24 CFR 594.15 - Allocation amounts.  

Code of Federal Regulations, 2010 CFR

...ASSISTANT SECRETARY FOR COMMUNITY PLANNING AND DEVELOPMENT, DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT COMMUNITY FACILITIES JOHN HEINZ NEIGHBORHOOD DEVELOPMENT PROGRAM Funding Allocation and Criteria 594.15 Allocation amounts. (a)...

2010-04-01

72

Classification of capacitor allocation techniques  

Microsoft Academic Search

The problem of capacitor allocation for loss reduction in electric distribution systems has been extensively researched over the past several decades. This paper describes the evolution of the research and provides an evaluation of the practicality and accuracy of the capacitor placement algorithms in the literature. The intent of this paper is not to provide a complete survey of all

H. N. Ng; M. M. A. Salama; A. Y. Chikhani

2000-01-01

73

Regulating nutrient allocation in plants  

DOEpatents

The invention provides coding and promoter sequences for a VS-1 and AP-2 gene, which affects the developmental process of senescence in plants. Vectors, transgenic plants, seeds, and host cells comprising heterologous VS-1 and AP-2 genes are also provided. Additionally provided are methods of altering nutrient allocation and composition in a plant using the VS-1 and AP-2 genes.

Udvardi, Michael; Yang, Jiading; Worley, Eric

2014-12-09

74

Administrators' Decisions about Resource Allocation  

ERIC Educational Resources Information Center

Do academic administrators make decisions about resource allocation differently depending on the discipline receiving the funding? Does an administrator's academic identity influence these decisions? This study explored those questions with a sample of 1,690 academic administrators at doctoral-research universities. Participants used fictional

Knight, William E.; Folkins, John W.; Hakel, Milton D.; Kennell, Richard P.

2011-01-01

75

Flexible allocation and space management in storage systems  

E-print Network

scenarios, for example: (a) space on the disk is not allocated well across multiple file systems, (b) data is not organized well for typical access patterns. We propose Virtual Allocation for flexible storage allocation. Virtual allocation separates storage...

Kang, Suk Woo

2007-09-17

76

Power Aware Page Allocation Alvin R. Lebeck  

E-print Network

Power Aware Page Allocation Alvin R. Lebeck Department of Computer Science Duke University alvy@cs.duke.edu http://www.cs.duke.edu/~alvy Milly Watt #12;Power Aware Page Allocation 2© Alvin R. Lebeck, 2001, NSF Research Instrumentation, Intel, Microsoft #12;Power Aware Page Allocation 3© Alvin R. Lebeck

Ellis, Carla

77

50 CFR Table 2b to Part 660... - 2012, and beyond, Allocations by Species or Species Group (final 2012 allocations for assessed...  

Code of Federal Regulations, 2011 CFR

...the total trawl allocation of canary rockfish is allocated to the whiting fisheries...total trawl allocation for darkblotched rockfish is allocated to the whiting fisheries...the total trawl allocation for widow rockfish is allocated to the whiting...

2011-10-01

78

The comparative topology of energy allocation in budget models  

NASA Astrophysics Data System (ADS)

The standard Dynamic Energy Budget (DEB) model assumes that assimilates of an isomorphic individual are first added to reserve, a fraction ? of mobilised reserve is allocated to soma (somatic maintenance plus growth of structure), and the rest to maturity maintenance and maturation or reproduction. Food, reserve and structure have constant chemical composition. We here discuss all possible topological alternatives to the standard DEB model, and compare them on the basis of seven properties: the ability to capture weak homeostasis and general empirical growth and reproduction patterns. We selected a reserve dynamics such that reserve mobilisation rate is independent of assimilation, somatic maintenance is proportional to the amount of structure, maturity maintenance to the level of maturity, and assimilation to the surface area. The alternatives only differ from the standard DEB model in topology, but we drop the ?-rule and allow ? to vary with the amount of structure. For this purpose we introduce the concept 'generalised von Bertalanffy growth rate' and study how it behaves as a function of the ultimate structural length, both intra- and inter-specifically. The 21 derived topological alternatives of the standard DEB are classified into five classes of models, depending on the first allocation event for the assimilation flux. The possibilities of the first allocation event for the assimilation flux are: splitting ( ?-models), storing ( A-models), both maintenance fluxes simultaneously ( P-models), somatic maintenance ( S-models) or maturity maintenance ( J-models). We conclude that the standard DEB model with constant ? is the only one that passes all our tests successfully. Only assimilation ( A) models can naturally accommodate embryo development. The ?-models, which after splitting the fraction 1- ? of assimilates is allocated to maturity maintenance and maturity/reproduction while the fraction ? of assimilates is first stored in reserve or allocated to somatic maintenance, pass most tests, but have maturation and reproduction directly from food. So, embryos have to do this differently and reproduction is prohibited during starvation in these models.

Lika, Konstadia; Kooijman, Sebastiaan A. L. M.

2011-11-01

79

Dynamic Resource Allocation in Disaster Response: Tradeoffs in Wildfire Suppression  

PubMed Central

Challenges associated with the allocation of limited resources to mitigate the impact of natural disasters inspire fundamentally new theoretical questions for dynamic decision making in coupled human and natural systems. Wildfires are one of several types of disaster phenomena, including oil spills and disease epidemics, where (1) the disaster evolves on the same timescale as the response effort, and (2) delays in response can lead to increased disaster severity and thus greater demand for resources. We introduce a minimal stochastic process to represent wildfire progression that nonetheless accurately captures the heavy tailed statistical distribution of fire sizes observed in nature. We then couple this model for fire spread to a series of response models that isolate fundamental tradeoffs both in the strength and timing of response and also in division of limited resources across multiple competing suppression efforts. Using this framework, we compute optimal strategies for decision making scenarios that arise in fire response policy. PMID:22514605

Petrovic, Nada; Alderson, David L.; Carlson, Jean M.

2012-01-01

80

Algebraic Stochastic Calculus  

E-print Network

We develop the foundations of Algebraic Stochastic Calculus, with an aim to replacing what is typically referred to as Stochastic Calculus by a purely categorical version thereof. We first give a sheaf theoretic reinterpretation of Probability Theory. We regard probability spaces (X, F, P) as Grothendieck sites (F, J_P) on which Brownian motions are defined via sheaves in symmetric monoidal infinity-categories. Due to the complex nature of such a formalism we are naturally led to considering a purely categorical, time independent formalism in which stochastic differential equations are replaced by studying problems in deformation theory.

Renaud Gauthier

2014-07-25

81

Bifurcation Analysis of Stochastic Non-smooth Systems  

NASA Astrophysics Data System (ADS)

Non-smooth systems with stochastic parameters are important models e.g. for brake and cam follower systems. They show special bifurcation phenomena, such as grazing bifurcations. This contribution studies the influence of stochastic processes on bifurcations in non-smooth systems. As an example, the classical mass on a belt system is considered, where stick-slip vibrations occur. Measurements indicate that the friction coefficient which plays a large role in the system behavior is not deterministic but can be described as a friction characteristic with added white noise. Therefore, a stochastic process is introduced into the non-smooth model and its influence on the bifurcation behavior is studied. It is shown that the stochastic process may alter the bifurcation behavior of the deterministic system.

Gaus, Nicole; Proppe, Carsten

82

AdS spacetime in warped spacetimes  

Microsoft Academic Search

We obtain a large class of AdS spacetimes warped with certain internal spaces in 11-dimensional and type IIA or IIB supergravities. The warp factors depend only on the internal coordinates. These solutions arise as the near-horizon geometries of more general semilocalized multi-intersections of p-branes. We achieve this by noting that any sphere (or AdS spacetime) of dimension greater than 3

M. Cvetic; H. L; C. N. Pope; J. F. Vzquez-Poritz

2000-01-01

83

Gaugino mass in AdS space  

Microsoft Academic Search

We study supersymmetric QED in AdS4 with massless matter. At 1-loop the ultra-violet regulator of the theory generates a contribution to the gaugino mass that is navely inconsistent with unbroken supersymmetry. We show that this effect, known in flat space as anomaly mediated supersymmetry breaking, is required to cancel an infra-red contribution arising from the boundary conditions in AdS space,

Ben Gripaios; Hyung Do Kim; Riccardo Rattazzi; Michele Redi; Claudio A. Scrucca

2009-01-01

84

Magnetic Monopoles in AdS  

SciTech Connect

Applications to holographic theories have led to some recent interest in magnetic monopoles in four-dimensional Anti-de Sitter (AdS) spacetime. Some analytic and numerical results are discussed for monopoles in AdS, including the symmetries of minimal energy monopoles (which are often Platonic), a connection to Skyrmions, and the emergence of a hexagonal lattice in the large charge limit.

Sutcliffe, Paul [Department of Mathematical Sciences, Durham University, Durham DH1 3LE (United Kingdom)

2011-09-22

85

A framework for efficient rate-power allocation for OFDM in a composite-fading environment  

Microsoft Academic Search

We propose ad framework to optimally allocate transmission resources for a digital-user multichannel transmission link operating a dynamically-fading wireless environment. Beginning with the statistical properties of fading phenomena observed in such channels, we demonstrate how convex optimisation theory may be harnessed for this purpose. Examples are presented to illustrate how service quality criteria may be used to dynamically identify operating

Kamau Prince; Brian Krongold; Subhrakanti Dey

2005-01-01

86

UNL Study Looks at Economic Impacts of Water Allocations To Republican River Basin  

E-print Network

the Republican valley $32.5 million in value added. This is equivalent to $125 per acre-foot of reductionUNL Study Looks at Economic Impacts of Water Allocations To Republican River Basin Economy Recently in the Republican valley and provided economic information for making water policy decisions. "You can't cut back

Nebraska-Lincoln, University of

87

1. Scope and Applicability This document outlines guidelines for research space allocation and management within  

E-print Network

, the chair may petition for an ad hoc review (Section 4.2) to address unanticipated research space needs1. Scope and Applicability This document outlines guidelines for research space allocation and research space needs expand and contract over time. 2.3. Research space at the SOM is of finite quantity

Finley Jr., Russell L.

88

JBW Redundancy-Allocation Algorithm  

Microsoft Academic Search

A very simple heuristic redundancy-allocation algorithm for serial-parallel configurations is presented which: 1. Yields near-optimal system reliability under multiple resource system constraints. 2. Economically achieves a given redundant system reliability goal. 3. Accommodates both linear and nonlinear resource complexity functions. 4. Allows relative weighting of system resources. 5. Allows heterogeneous stages; ie. each stage is treated as a k-out-of-n:G model.

J. B. White

1985-01-01

89

Quantum Stochastic Processes  

SciTech Connect

We consider quantum analogues of n-parameter stochastic processes, associated integrals and martingale properties extending classical results obtained in [1, 2, 3], and quantum results in [4, 5, 6, 7, 8, 9, 10].

Spring, William Joseph [Quantum Information and Probability Group, School of Computer Science, University of Hertfordshire, Hatfield, Herts AL10 9AB (United Kingdom)

2009-04-13

90

Constant time worker thread allocation via configuration caching  

SciTech Connect

Mechanisms are provided for allocating threads for execution of a parallel region of code. A request for allocation of worker threads to execute the parallel region of code is received from a master thread. Cached thread allocation information identifying prior thread allocations that have been performed for the master thread are accessed. Worker threads are allocated to the master thread based on the cached thread allocation information. The parallel region of code is executed using the allocated worker threads.

Eichenberger, Alexandre E; O'Brien, John K. P.

2014-11-04

91

A stochastic optimization approach to mine truck C. H. TA{, J. V. KRESTA{, J. F. FORBES*{ and H. J. MARQUEZ  

E-print Network

A stochastic optimization approach to mine truck allocation C. H. TA{, J. V. KRESTA{, J. F. FORBES, Edmonton, Alberta, T6G-2V4, Canada In the mining industry, truck assignment is an important and complex; Chance-constrained; Oilsand mining 1. Introduction In the open-pit mining industry, trucks and shovels

Marquez, Horacio J.

92

Strategic planning for disaster recovery with stochastic last mile distribution  

SciTech Connect

This paper considers the single commodity allocation problem (SCAP) for disaster recovery, a fundamental problem faced by all populated areas. SCAPs are complex stochastic optimization problems that combine resource allocation, warehouse routing, and parallel fleet routing. Moreover, these problems must be solved under tight runtime constraints to be practical in real-world disaster situations. This paper formalizes the specification of SCAPs and introduces a novel multi-stage hybrid-optimization algorithm that utilizes the strengths of mixed integer programming, constraint programming, and large neighborhood search. The algorithm was validated on hurricane disaster scenarios generated by Los Alamos National Laboratory using state-of-the-art disaster simulation tools and is deployed to aid federal organizations in the US.

Bent, Russell Whitford [Los Alamos National Laboratory; Van Hentenryck, Pascal [BROWN UNIV.; Coffrin, Carleton [BROWN UNIV.

2010-01-01

93

Allocation Management Solutions for High Performance Computing  

SciTech Connect

High Performance Computing sites face unique problems due to the large number of projects and users competing for their resources. The use of an allocation manager can help alleviate some of these problems. This paper addresses some typical allocation problems faced by HPC managers and describes some possible solutions. The Gold Allocation Manager is presented as a case-study that implements a subset of the described solutions.

Jackson, Scott M.

2006-04-01

94

Stochastic nonlinear stabilization  

NASA Astrophysics Data System (ADS)

The fact that many physical systems are nonlinear and subject to disturbances motivates the study of stochastic nonlinear control, with stabilization as the most basic question. Because of a fundamental technical difficulty in the Lyapunov analysis, research attention since the 1960's has been moved from stabilization to optimization. The development of differential geometric nonlinear control theory in the 1980's and a recent discovery of a simple constructive formula for Lyapunov stabilization for deterministic nonlinear systems has inspired a large amount of research in adaptive, robust, and optimal nonlinear control. These achievements naturally led to re-examining the stochastic nonlinear stabilization problem, which is the topic of this dissertation. In this dissertation, we first introduce a new set of stability definitions in class K formalism, in order to connect the results in stochastic nonlinear control with the results in modern deterministic nonlinear control literature, and to introduce the new concept of Noise-to-State Lyapunov function. Then we rigorously prove a stochastic version of the convergence result of LaSalle and Yoshizawa. When we consider systems with unknown noise covariance, we extend Sontag's concept of input-to-state stability (ISS) to stochastic systems by introducing the concept Noise-to-State Lyapunov functions (ns-lf). For systems with a control input as well as stochastic noise (affine in both), we extend the ISS-control Lyapunov functions to stochastic systems, introduce ns-control Lyapunov functions (ns-clf), and prove that there exists a feedback law continuous away from the origin that guarantees the controlled system has an ns-lf if there exists an ns-clf. After addressing the stabilization issue, we pursue inverse optimality since direct optimal control problem involves a formidable computational task---solving HJB PDE. We show that if we know an ns-clf, then the inverse optimal control problem is solvable for general stochastic systems affine in control. Based on these theorems, we proceed with controller design for the stochastic strict-feedback systems---both state-feedback and output-feedback. Using back-stepping design method, we design closed form stabilizing and inverse optimal controllers when the noise has unity intensity. For the system with unknown covariance noise, we develop adaptive stabilization and disturbance attenuation schemes without a priori knowledge of a bound on the covariance.

Deng, Hua

95

Allocation, incentives and distortions: the impact of EU ETS emissions allowance allocations to the electricity sector  

E-print Network

provisions dealing with existing installations, what happens to allocation when they close, and allocations to new entrants. We provide a framework to assess the economic incentives and distortions that provisions in NAPs can have on market prices, operation...

Neuhoff, Karsten; Keats, Kim; Sato, Misato

96

Computational models and resource allocation for supercomputers  

NASA Technical Reports Server (NTRS)

There are several different architectures used in supercomputers, with differing computational models. These different models present a variety of resource allocation problems that must be solved. The computational needs of a program must be cast in terms of the computational model supported by the supercomputer, and this must be done in a way that makes effective use of the machine's resources. This is the resource allocation problem. The computational models of available supercomputers and the associated resource allocation techniques are surveyed. It is shown that many problems and solutions appear repeatedly in very different computing environments. Some case studies are presented, showing concrete computational models and the allocation strategies used.

Mauney, Jon; Agrawal, Dharma P.; Harcourt, Edwin A.; Choe, Young K.; Kim, Sukil

1989-01-01

97

AdS in Warped Spacetimes  

Microsoft Academic Search

We obtain a large class of AdS spacetimes warped with certain internal spaces\\u000ain eleven-dimensional and type IIA\\/IIB supergravities. The warp factors depend\\u000aonly on the internal coordinates. These solutions arise as the near-horizon\\u000ageometries of more general semi-localised multi-intersections of $p$-branes. We\\u000aachieve this by noting that any sphere (or AdS spacetime) of dimension greater\\u000athan 3 can be

M. Cvetic; H. Lu; C. N. Pope; J. F. Vazquez-Poritz

2000-01-01

98

Stability in Asymptotically AdS Spaces  

E-print Network

We discuss two types of instabilities which may arise in string theory compactified to asymptotically AdS spaces: perturbative, due to discrete modes in the spectrum of the Laplacian, and non-perturbative, due to brane nucleation. In the case of three dimensional Einstein manifolds, we completely characterize the presence of these instabilities, and in higher dimensions we provide a partial classification. The analysis may be viewed as an extension of the Breitenlohner-Freedman bound. One interesting result is that, apart from a very special class of exceptions, all Euclidean asymptotically AdS spaces with more than one conformal boundary component are unstable, if the compactification admits BPS branes or scalars saturating the Breitenlohner-Freedman bound. As examples, we analyze quotients of AdS in any dimension and AdS Taub-NUT spaces, and show a space which was previously discussed in the context of AdS/CFT is unstable both perturbatively and non-perturbatively.

M. Kleban; M. Porrati; R. Rabadan

2004-09-23

99

AdBlockVideo  

NSDL National Science Digital Library

Video ads can be quite a nuisance. AdBlockVideo can help users out by effectively blocking such ads. Visitors will need to download the program and they can toggle AdBlockVideo on and off as they see fit. This application is compatible with computers running Windows 98 and newer, Max OS 10.3 and newer, and Linux.

2011-01-01

100

Hamiltonian mechanics of stochastic acceleration.  

PubMed

We show how to find the physical Langevin equation describing the trajectories of particles undergoing collisionless stochastic acceleration. These stochastic differential equations retain not only one-, but two-particle statistics, and inherit the Hamiltonian nature of the underlying microscopic equations. This opens the door to using stochastic variational integrators to perform simulations of stochastic interactions such as Fermi acceleration. We illustrate the theory by applying it to two example problems. PMID:24266476

Burby, J W; Zhmoginov, A I; Qin, H

2013-11-01

101

A new look at stochastic resonance enhancement of mammalian auditory information processing  

Microsoft Academic Search

Among the communities of medicine and physiology, it has been long recognized most biological systems can be described as deterministic systems with some added noise (5). Stochastic resonance (SR) in biological systems was originally referred to a situation where a noise at an intermediate level is added to a signal to improve the detection of the signal. It is also

Dawei Hong; Shushuang Man

2009-01-01

102

Stochastic cooling at Fermilab  

SciTech Connect

The topics discussed are the stochastic cooling systems in use at Fermilab and some of the techniques that have been employed to meet the particular requirements of the anti-proton source. Stochastic cooling at Fermilab became of paramount importance about 5 years ago when the anti-proton source group at Fermilab abandoned the electron cooling ring in favor of a high flux anti-proton source which relied solely on stochastic cooling to achieve the phase space densities necessary for colliding proton and anti-proton beams. The Fermilab systems have constituted a substantial advance in the techniques of cooling including: large pickup arrays operating at microwave frequencies, extensive use of cryogenic techniques to reduce thermal noise, super-conducting notch filters, and the development of tools for controlling and for accurately phasing the system.

Marriner, J.

1986-08-01

103

Basic stochastic simulation: Stochastic simulation algorithm  

NSDL National Science Digital Library

The stochastic simulation algorithm (SSA, Kinetic Monte Carlo, Gillespie algorithm) produces an example trajectory for a particular member of a probabilistic ensemble by looping over the following steps. The current state of the system is used to determine the likelihood of each possible chemical reaction in relative comparison to the likelihoods for the other possible reactions, as well as to determine when the next reaction is expected. Pseudo-random numbers are drawn to "roll the dice" to determine exactly when the next reaction will proceed, and which kind of reaction it will happen to be.

2013-06-21

104

Stochastic optical active rheology  

NASA Astrophysics Data System (ADS)

We demonstrate a stochastic based method for performing active rheology using optical tweezers. By monitoring the displacement of an embedded particle in response to stochastic optical forces, a rapid estimate of the frequency dependent shear moduli of a sample is achieved in the range of 10-1-103 Hz. We utilize the method to probe linear viscoelastic properties of hydrogels at varied cross-linker concentrations. Combined with fluorescence imaging, our method demonstrates non-linear changes of bond strength between T cell receptors and an antigenic peptide due to force-induced cell activation.

Lee, Hyungsuk; Shin, Yongdae; Kim, Sun Taek; Reinherz, Ellis L.; Lang, Matthew J.

2012-07-01

105

Structures and stochastic methods  

SciTech Connect

Studies and research on structures and stochastic methods in the soil dynamics and earthquake engineering filed are covered in this book. The first section is on structures and includes studies on bridges, loaded tanks, sliding structures and wood-framed houses. The second section covers dams, retaining walls and slopes. The third section on underground structures covers pipelines, water supply, fire loss, buried lifeline, and underground transmission lines. The final section is on stochastic methods and includes applications in earthquake response spectra, lifeline aqueduct systems, and various other areas.

Cakmak, A.S.

1987-01-01

106

Stochasticity, a first introduction  

NSDL National Science Digital Library

Even when we model the dynamics of the abundances of molecules inside biological systems using calculus, it is important to remember that underlying behavior can be apparently random ("stochastic"). Even a deterministic system containing components moving in periodic ways can, at early times, support dynamics that appear disordered. The behavior of systems containing complicated collections of interacting parts can be difficult to predict with accuracy (chaos). Finally, systems can display stochasticity because the outcomes of measurements on quantum systems are indeterminate in a fundamental way. Random processes are modeled using Markov models.

2013-06-21

107

Supersymmetric holography on AdS3  

E-print Network

The proposed duality between Vasiliev's supersymmetric higher spin theory on AdS3 and the 't Hooft limit of the 2d superconformal Kazama-Suzuki models is analysed in detail. In particular, we show that the partition functions of the two theories agree in the large N limit.

Constantin Candu; Matthias R. Gaberdiel

2012-03-08

108

AdS Solutions Through Transgression  

E-print Network

We present new classes of explicit supersymmetric AdS_3 solutions of type IIB supergravity with non-vanishing five-form flux and AdS_2 solutions of D=11 supergravity with electric four-form flux. The former are dual to two-dimensional SCFTs with (0,2) supersymmetry and the latter to supersymmetric quantum mechanics with two supercharges. We also investigate more general classes of AdS_3 solutions of type IIB supergravity and AdS_2 solutions of D=11 supergravity which in addition have non-vanishing three-form flux and magnetic four-form flux, respectively. The construction of these more general solutions makes essential use of the Chern-Simons or "transgression" terms in the Bianchi identity or the equation of motion of the field strengths in the supergravity theories. We construct infinite new classes of explicit examples and for some of the type IIB solutions determine the central charge of the dual SCFTs. The type IIB solutions with non-vanishing three-form flux that we construct include a two-torus, and af...

Donos, Aristomenis; Kim, Nakwoo

2008-01-01

109

Stability in asymptotically AdS spaces  

Microsoft Academic Search

We discuss two types of instabilities which may arise in string theory compactified to asymptotically AdS spaces: perturbative, due to discrete modes in the spectrum of the laplacian, and non-perturbative, due to brane nucleation. In the case of three dimensional Einstein manifolds, we completely characterize the presence of these instabilities, and in higher dimensions we provide a partial classification. The

Matthew Kleban; Massimo Porrati; Raul Rabadan

2005-01-01

110

AdS. Klein-Gordon equation  

E-print Network

I propose a generalization of the Klein-Gordon equation in the framework of AdS space-time and exhibit a four parameter family of solutions among which there is a two parameter family of time-dependent bound states.

Ll. Bel

2014-05-22

111

Stochastic extensions of the regularized Schrdinger-Newton equation  

NASA Astrophysics Data System (ADS)

We show that the Schrdinger-Newton equation, which describes the nonlinear time evolution of self-gravitating quantum matter, can be made compatible with the no-signaling requirement by elevating it to a stochastic differential equation. In the deterministic form of the equation, as studied so far, the nonlinearity would lead to diverging energy corrections for localized wave packets and would create observable correlations admitting faster-than-light communication. By regularizing the divergencies and adding specific random jumps or a specific Brownian noise process, the effect of the nonlinearity vanishes in the stochastic average and gives rise to a linear and Galilean invariant evolution of the density operator.

Nimmrichter, Stefan; Hornberger, Klaus

2015-01-01

112

AdS null deformations with inhomogeneities  

E-print Network

We study $AdS\\times X$ null deformations arising as near horizon limits of D3-brane analogs of inhomogenous plane waves. Restricting to normalizable deformations for the $AdS_5$ case, these generically correspond in the dual field theory to SYM states with lightcone momentum density $T_{++}$ varying spatially, the homogenous case studied in arXiv:1202.5935 [hep-th] corresponding to uniform $T_{++}$. All of these preserve some supersymmetry. Generically these inhomogenous solutions exhibit analogs of horizons in the interior where a timelike Killing vector becomes null. From the point of view of $x^+$-dimensional reduction, the circle pinches off on these horizon loci in the interior. We discuss similar inhomogenous solutions with asymptotically Lifshitz boundary conditions, as well as aspects of Lifshitz singularities in string constructions involving $AdS$ null deformations. We also briefly discuss holographic entanglement entropy for some of these.

Narayan, K

2012-01-01

113

Optimal dynamic water allocation: Irrigation extractions and environmental tradeoffs in the Murray River, Australia  

NASA Astrophysics Data System (ADS)

A key challenge in managing semiarid basins, such as in the Murray-Darling in Australia, is to balance the trade-offs between the net benefits of allocating water for irrigated agriculture, and other uses, versus the costs of reduced surface flows for the environment. Typically, water planners do not have the tools to optimally and dynamically allocate water among competing uses. We address this problem by developing a general stochastic, dynamic programming model with four state variables (the drought status, the current weather, weather correlation, and current storage) and two controls (environmental release and irrigation allocation) to optimally allocate water between extractions and in situ uses. The model is calibrated to Australia's Murray River that generates: (1) a robust qualitative result that "pulse" or artificial flood events are an optimal way to deliver environmental flows over and above conveyance of base flows; (2) from 2001 to 2009 a water reallocation that would have given less to irrigated agriculture and more to environmental flows would have generated between half a billion and over 3 billion U.S. dollars in overall economic benefits; and (3) water markets increase optimal environmental releases by reducing the losses associated with reduced water diversions.

Grafton, R. Quentin; Chu, Hoang Long; Stewardson, Michael; Kompas, Tom

2011-12-01

114

Critical Infrastructure Protection and Resource Allocation Policy  

Microsoft Academic Search

Social and economic consequences of a terrorist attack on critical infrastructure are a key component of resource allocation policy and risk management. The NYU projects for CREATE develop analytical methods focused on the implications of attacks on critical infrastructures to provide inputs into resource allocation choices, decisions, and policies including the protection of infrastructure and its users. The research focus

Rae Zimmerman; Carlos E. Restrepo; Jeffrey S. Simonoff; Zvia S. Naphtali

2008-01-01

115

Justice in Grades Allocation: Teachers' Perspective  

ERIC Educational Resources Information Center

In this investigation I explore teachers' perspectives on just grade allocation. The study was carried out among language, math and science teachers in a national sample of Israeli high schools, where teachers were required to weigh a set of considerations that are used in the decision on grade allocation. Findings suggest that (a) a teacher's

Resh, Nura

2009-01-01

116

Resource Allocation: Ration, Fashion, or Innovashun?  

ERIC Educational Resources Information Center

Resource allocation is a key factor in promoting or retarding innovation. In a restrictive economic climate, it is easy to use resource allocation for decremental rationing and to stifle innovative thinking. The technique can also be used to ensure that the institution's human resources are encouraged to identify opportunities for innovation. (MSE)

Lourens, Roy

1986-01-01

117

How to Do Random Allocation (Randomization)  

PubMed Central

Purpose To explain the concept and procedure of random allocation as used in a randomized controlled study. Methods We explain the general concept of random allocation and demonstrate how to perform the procedure easily and how to report it in a paper. PMID:24605197

Shin, Wonshik

2014-01-01

118

Class Allocation Time: September 14. (Friday)  

E-print Network

Notice Class Allocation 9 14 () Time: September 14. (Friday) 9 14 9:00 Website: http://cld.liberal.ntu.edu.tw/en/news.htm The class allocation will be announced around 9:00am, September 14. Please come to our office or check our website to know your classroom and class session. Website: http

Wu, Yih-Min

119

Acquisitions Allocations: Fairness, Equity and Bundled Pricing.  

ERIC Educational Resources Information Center

Examined the effect of an interdisciplinary Web-based citation database with full text, the ProQuest Research Library, on the Western State University library's acquisitions allocation plan. Used list price of full-text journals to calculate increases in acquisitions funding. A list of articles discussing formula allocation is appended.

Packer, Donna

2001-01-01

120

Congestion rents allocation based on transmission usage  

Microsoft Academic Search

In this paper, an allocation method for the congestion rents is presented. The method is based on the use of generalized generation distribution factors (GGDFs) and generalized load distribution factors (GLDFs). These factors are employed to quantify the usage of the transmission system by considering the day-ahead market outcome. Under this allocation scheme, the system conditions are still reflected in

Guillermo Bautista; Victor H. Quintana

2003-01-01

121

Reward structures and the allocation of talent  

Microsoft Academic Search

As relative rewards that different professions receive are a key factor in the allocation of talent, what determines the reward structure of a society is an important question. This paper develops an equilibrium model of the allocation of talent between productive and unproductive activities (such as rent-seeking). The existence of rent-seeking creates a negative externality on productive agents and implies

Daron Acemoglu

1995-01-01

122

Cooperation and profit allocation in distribution chains  

E-print Network

Cooperation and profit allocation in distribution chains Luis A. Guardiola , Ana Meca and Judith Timmer§ Abstract We study the coordination of actions and the allocation of profit in supply chains un for replenishment of stocks. The goal of the supplier and the retailers is to maximize their individual profits

Boucherie, Richard J.

123

Carbon Allocation in Underground Storage Organs  

E-print Network

Carbon Allocation in Underground Storage Organs Studies on Accumulation of Starch, Sugars and Oil Cover: Starch granules in cells of fresh potato tuber visualised by iodine staining. #12;Carbon By increasing knowledge of carbon allocation in underground storage organs and using the knowledge to improve

124

Optimal Rate Allocation in Overlay Content Distribution  

E-print Network

Optimal Rate Allocation in Overlay Content Distribution Chuan Wu and Baochun Li Department. This paper addresses the optimal rate allocation problem in overlay content distribution for efficient, these scenarios reflect the contrast between elastic and streaming content distribution, with either per

Li, Baochun

125

Equilibrium Participation in Public Goods Allocations 1  

E-print Network

Equilibrium Participation in Public Goods Allocations 1 Paul J. Healy 2 Abstract An alternative planner. The set of allocations such that unanimous participation is a Nash equilibrium is shown to be sub allow a no-trade option. The resulting constraint, called equilibrium participation, requires

126

Private Matchings and Allocations University of Pennsylvania  

E-print Network

bundles of goods, how can we partition the goods amongst the agents to maximize social welfare- mally, the allocation must match agents to their preferred goods in order to maximize social welfare of the classical allocation problem: given k goods and n agents with individual, private valuation func- tions over

Plotkin, Joshua B.

127

Budget allocation and the analytic hierarchy process  

SciTech Connect

This report demonstrates that the priorities calculated by the Analytic Hierarchy Process can be used as measures of benefit for budget allocation. A procedure is described that optimally allocates a budget among competing DOE waste minimization projects. The projects are compared using an analytic hierarchy already developed by Sandia National Laboratories. 2 refs., 3 tabs.

Hulme, B.L. (Hulme Mathematics (USA))

1990-10-01

128

A combined linear optimisation methodology for water resources allocation in Alfeios River Basin (Greece) under uncertain and vague system conditions  

NASA Astrophysics Data System (ADS)

In the present study, a combined linear programming methodology, based on Li et al. (2010) and Bekri et al. (2012), is employed for optimizing water allocation under uncertain system conditions in the Alfeios River Basin, in Greece. The Alfeios River is a water resources system of great natural, ecological, social and economic importance for Western Greece, since it has the longest and highest flow rate watercourse in the Peloponnisos region. Moreover, the river basin was exposed in the last decades to a plethora of environmental stresses (e.g. hydrogeological alterations, intensively irrigated agriculture, surface and groundwater overexploitation and infrastructure developments), resulting in the degradation of its quantitative and qualitative characteristics. As in most Mediterranean countries, water resource management in Alfeios River Basin has been focused up to now on an essentially supply-driven approach. It is still characterized by a lack of effective operational strategies. Authority responsibility relationships are fragmented, and law enforcement and policy implementation are weak. The present regulated water allocation puzzle entails a mixture of hydropower generation, irrigation, drinking water supply and recreational activities. Under these conditions its water resources management is characterised by high uncertainty and by vague and imprecise data. The considered methodology has been developed in order to deal with uncertainties expressed as either probability distributions, or/and fuzzy boundary intervals, derived by associated ?-cut levels. In this framework a set of deterministic submodels is studied through linear programming. The ad hoc water resources management and alternative management patterns in an Alfeios subbasin are analyzed and evaluated under various scenarios, using the above mentioned methodology, aiming to promote a sustainable and equitable water management. Li, Y.P., Huang, G.H. and S.L., Nie, (2010), Planning water resources management systems using a fuzzy-boundary interval-stochastic programming method, Elsevier Ltd, Advances in Water Resources, 33: 1105-1117. doi:10.1016/j.advwatres.2010.06.015 Bekri, E.S., Disse, M. and P.C.,Yannopoulos, (2012), Methodological framework for correction of quick river discharge measurements using quality characteristics, Session of Environmental Hydraulics - Hydrodynamics, 2nd Common Conference of Hellenic Hydrotechnical Association and Greek Committee for Water Resources Management, Volume: 546-557 (in Greek).

Bekri, Eleni; Yannopoulos, Panayotis; Disse, Markus

2013-04-01

129

Adaptive stochastic cellular automata: Applications  

NASA Astrophysics Data System (ADS)

The stochastic learning cellular automata model has been applied to the problem of controlling unstable systems. Two example unstable systems studied are controlled by an adaptive stochastic cellular automata algorithm with an adaptive critic. The reinforcement learning algorithm and the architecture of the stochastic CA controller are presented. Learning to balance a single pole is discussed in detail. Balancing an inverted double pendulum highlights the power of the stochastic CA approach. The stochastic CA model is compared to conventional adaptive control and artificial neural network approaches.

Qian, S.; Lee, Y. C.; Jones, R. D.; Barnes, C. W.; Flake, G. W.; O'Rourke, M. K.; Lee, K.; Chen, H. H.; Sun, G. Z.; Zhang, Y. Q.; Chen, D.; Giles, C. L.

1990-09-01

130

24 CFR 1003.101 - Area ONAP allocation of funds.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 false Area ONAP allocation of funds. 1003.101 Section 1003.101 Housing...TRIBES AND ALASKA NATIVE VILLAGES Allocation of Funds 1003.101 Area ONAP allocation of funds. (a) Except as provided in...

2011-04-01

131

24 CFR 1003.101 - Area ONAP allocation of funds.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Area ONAP allocation of funds. 1003.101 Section 1003.101 Housing...TRIBES AND ALASKA NATIVE VILLAGES Allocation of Funds 1003.101 Area ONAP allocation of funds. (a) Except as provided in...

2010-04-01

132

AdS spacetime in warped spacetimes  

SciTech Connect

We obtain a large class of AdS spacetimes warped with certain internal spaces in 11-dimensional and type IIA or IIB supergravities. The warp factors depend only on the internal coordinates. These solutions arise as the near-horizon geometries of more general semilocalized multi-intersections of p-branes. We achieve this by noting that any sphere (or AdS spacetime) of dimension greater than 3 can be viewed as a foliation involving S{sup 3} (or AdS{sub 3}). Then the S{sup 3} (or AdS{sub 3}) can be replaced by a three-dimensional lens space (or a BTZ black hole), which arises naturally from the introduction of a NUT (or a pp wave) to the M-branes or the D3-brane. We then obtain multi-intersections by performing a Kaluza-Klein reduction or Hopf T-duality transformation on the fiber coordinate of the lens space (or the BTZ black hole). These geometries provide further possible examples of the AdS/CFT correspondence and of consistent embeddings of lower-dimensional gauged supergravities in D=11 or D=10.

Cvetic, M.; Lu'', H.; Pope, C. N.; Vazquez-Poritz, J. F.

2000-12-15

133

Carbon allocation and accumulation in conifers  

SciTech Connect

Forests cover approximately 33% of the land surface of the earth, yet they are responsible for 65% of the annual carbon (C) accumulated by all terrestrial biomes. In general, total C content and net primary production rates are greater for forests than for other biomes, but C budgets differ greatly among forests. Despite several decades of research on forest C budgets, there is still an incomplete understanding of the factors controlling C allocation. Yet, if we are to understand how changing global events such as land use, climate change, atmospheric N deposition, ozone, and elevated atmospheric CO{sub 2} affect the global C budget, a mechanistic understanding of C assimilation, partitioning, and allocation is necessary. The objective of this chapter is to review the major factors that influence C allocation and accumulation in conifer trees and forests. In keeping with the theme of this book, we will focus primarily on evergreen conifers. However, even among evergreen conifers, leaf, canopy, and stand-level C and nutrient allocation patterns differ, often as a function of leaf development and longevity. The terminology related to C allocation literature is often inconsistent, confusing and inadequate for understanding and integrating past and current research. For example, terms often used synonymously to describe C flow or movement include translocation, transport, distribution, allocation, partitioning, apportionment, and biomass allocation. A common terminology is needed because different terms have different meanings to readers. In this paper we use C allocation, partitioning, and accumulation according to the definitions of Dickson and Isebrands (1993). Partitioning is the process of C flow into and among different chemical, storage, and transport pools. Allocation is the distribution of C to different plant parts within the plant (i.e., source to sink). Accumulation is the end product of the process of C allocation.

Gower, S.T.; Isebrands, J.G.; Sheriff, D.W.

1995-07-01

134

Fuzzy Raw Materials Allocation Problem  

NASA Astrophysics Data System (ADS)

Based on credibility theory, this paper presents a new raw materials allocation (RMA) model in which the demands of products and the prices of surplus products are supposed to fuzzy variables, the involved restrictions mainly include the inventory of each raw material and the production capacity of company. Since the fuzzy variables in the RMA model are usually continuous variables and the exact analytical expression of objective function cannot be obtained, traditional optimization algorithms cannot be used to solve it. Therefore, we firstly apply an approximation approach (AA) to turn the original infinite-dimensional optimization problem into an approximating finite-dimensional one, then design a hybrid algorithm which combines neural network (NN) and particle swarm optimization (PSO) to solve the approximating model. A given numerical example illustrates that the designed algorithm works well.

Sun, Gao-Ji

135

AdS spacetimes and isometric embeddings  

E-print Network

An algebraic global isometric embedding of the nonrotating BTZ black hole is presented. The ambient spacetime is $\\mathbb{M}^{2,3}$, the 3+2 dimensional flat spacetime. We also present the analogous embedding for the Euclidean BTZ spacetime and by performing a kind of double analytic continuation construct a 1-parameter family of embeddings of cosmological AdS spacetime into $\\mathbb{M}^{2,3}$ which coincide asymptotically with the embedded BTZ manifold of the appropriate mass. Finally we note that the family of embeddings of cosmological AdS$_{n}$ into $\\mathbb{M}^{2,n}$ generalises to higher dimensions.

Steven Willison

2013-02-07

136

AdS spacetimes and isometric embeddings  

E-print Network

An algebraic global isometric embedding of the nonrotating BTZ black hole is presented. The ambient spacetime is $\\mathbb{M}^{2,3}$, the 3+2 dimensional flat spacetime. We also present the analogous embedding for the Euclidean BTZ spacetime and by performing a kind of double analytic continuation construct a 1-parameter family of embeddings of cosmological AdS spacetime into $\\mathbb{M}^{2,3}$ which coincide asymptotically with the embedded BTZ manifold of the appropriate mass. Finally we note that the family of embeddings of cosmological AdS$_{n}$ into $\\mathbb{M}^{2,n}$ generalises to higher dimensions.

Willison, Steven

2013-01-01

137

A stochastic conflict resolution model for water quality management in reservoir river systems  

NASA Astrophysics Data System (ADS)

In this paper, optimal operating rules for water quality management in reservoir-river systems are developed using a methodology combining a water quality simulation model and a stochastic GA-based conflict resolution technique. As different decision-makers and stakeholders are involved in the water quality management in reservoir-river systems, a new stochastic form of the Nash bargaining theory is used to resolve the existing conflict of interests related to water supply to different demands, allocated water quality and waste load allocation in downstream river. The expected value of the Nash product is considered as the objective function of the model which can incorporate the inherent uncertainty of reservoir inflow. A water quality simulation model is also developed to simulate the thermal stratification cycle in the reservoir, the quality of releases from different outlets as well as the temporal and spatial variation of the pollutants in the downstream river. In this study, a Varying Chromosome Length Genetic Algorithm (VLGA), which has computational advantages comparing to other alternative models, is used. VLGA provides a good initial solution for Simple Genetic Algorithms and comparing to Stochastic Dynamic Programming (SDP) reduces the number of state transitions checked in each stage. The proposed model, which is called Stochastic Varying Chromosome Length Genetic Algorithm with water Quality constraints (SVLGAQ), is applied to the Ghomrud Reservoir-River system in the central part of Iran. The results show, the proposed model for reservoir operation and waste load allocation can reduce the salinity of the allocated water demands as well as the salinity build-up in the reservoir.

Kerachian, Reza; Karamouz, Mohammad

2007-04-01

138

Instability corners in AdS space  

E-print Network

We investigate whether arbitrarily small perturbations in global AdS space are generically unstable and collapse into black holes on the time scale set by gravitational interactions. We argue that current evidence, combined with our analysis, strongly suggests that a set of nonzero measure in the space of initial conditions does not collapse on this time scale. On the other hand, existing results do not provide an equally strong indication whether the unstable solutions also form a set of nonzero measure. We perform an analysis in position space to address this puzzle, and our formalism allows us to directly address the vanishing-amplitude limit. We show that gravitational self-interaction leads to tidal deformations which are equally likely to focus or defocus energy, and we sketch the phase diagram accordingly. We also clarify the connection between gravitational evolution in global AdS and holographic thermalization.

Fotios V. Dimitrakopoulos; Ben Freivogel; Matthew Lippert; I-Sheng Yang

2014-10-07

139

On the AdS stability problem  

E-print Network

We discuss the notion of stability and the choice of boundary conditions for AdS-type space-times and point out difficulties in the construction of Cauchy data which arise if reflective boundary conditions are imposed.

Helmut Friedrich

2014-01-28

140

Hadrons in AdS / QCD correspondence  

E-print Network

We present an holographical soft wall model which is able to reproduce not only Regge spectra for hadrons with arbitrary integer spin, but also with spin 1/2 and 3/2, and with an arbitrary number of constituents. The model includes the anomalous dimension of operators than create hadrons, together with a dilaton, whose form is suggested by Einstein equations and the AdS metric.

Alfredo Vega; Ivan Schmidt

2008-11-28

141

Securing Ad Hoc Networks  

Microsoft Academic Search

Ad hoc networks are a new wireless networking paradigm for mobile hosts. Unlike traditional mobile wireless networks, ad hoc networks do not rely on any fixed infrastructure. Instead, hosts rely on each other to keep the network connected. The military tactical and other security-sensitive operations are still the main applications of ad hoc networks, although there is a trend to

Lidong Zhou; Zygmunt J. Haas

1999-01-01

142

Secure Ad hoc Networking  

Microsoft Academic Search

The ad hoc networking technology can enable novel civilian and military applications. However, ad hoc networking protocols are vulnerable to a wide range of attacks. The design of defense mechanisms is a challenging problem, especially in comparison to securing traditional, fixed-infrastructure networks. In this paper, we discuss challenges and guidelines to secure ad hoc networking protocols, and describe a protocol

Panagiotis Papadimitratos

2006-01-01

143

Ad Hoc Information Spaces  

Microsoft Academic Search

We describe the concept of ad hoc information spaces as a way of distributing information in an environment depending on user mobility and relative location. Ad hoc information spaces are realised using a decentralised approach to ubiquitous computing, which is based on functionally self- contained devices and ad hoc networking. Users are able to construct and manipulate the properties of

Johan Redstrm; Lars Erik Holmquist; Per Dahlberg; Peter Ljungstrand

144

Ultimate open pit stochastic optimization  

NASA Astrophysics Data System (ADS)

Classical open pit optimization (maximum closure problem) is made on block estimates, without directly considering the block grades uncertainty. We propose an alternative approach of stochastic optimization. The stochastic optimization is taken as the optimal pit computed on the block expected profits, rather than expected grades, computed from a series of conditional simulations. The stochastic optimization generates, by construction, larger ore and waste tonnages than the classical optimization. Contrary to the classical approach, the stochastic optimization is conditionally unbiased for the realized profit given the predicted profit. A series of simulated deposits with different variograms are used to compare the stochastic approach, the classical approach and the simulated approach that maximizes expected profit among simulated designs. Profits obtained with the stochastic optimization are generally larger than the classical or simulated pit. The main factor controlling the relative gain of stochastic optimization compared to classical approach and simulated pit is shown to be the information level as measured by the boreholes spacing/range ratio. The relative gains of the stochastic approach over the classical approach increase with the treatment costs but decrease with mining costs. The relative gains of the stochastic approach over the simulated pit approach increase both with the treatment and mining costs. At early stages of an open pit project, when uncertainty is large, the stochastic optimization approach appears preferable to the classical approach or the simulated pit approach for fair comparison of the values of alternative projects and for the initial design and planning of the open pit.

Marcotte, Denis; Caron, Josiane

2013-02-01

145

Stochastic Representation of RMS Dynamical Problems Group  

E-print Network

Stochastic Representation of Convection RMS Dynamical Problems Group 9th June 2005 Bob Plant for a stochastic representation of convection 2. Some experiments so far 3. A stochastic scheme 4. Tests of scheme 5. Outlook Stochastic Representation of Convection ­ p.1/3 #12;Why a stochastic representation

Plant, Robert

146

Linear modelling of attentional resource allocation  

NASA Technical Reports Server (NTRS)

Eight subjects time-shared performance of two compensatory tracking tasks under conditions when both were of constant difficulty, and when the control order of one task (designated primary) was varied over time within a trial. On line performance feedback was presented on half of the trials. The data are interpreted in terms of a linear model of the operator's attention allocation system, and suggest that this allocation is strongly suboptimal. Furthermore, the limitations in reallocating attentional resources between tasks, in response to difficulty fluctuations were not reduced by augmented performance feedback. Some characteristics of the allocation system are described, and reasons for its limitations suggested.

Pierce, B.

1978-01-01

147

Double Entropic Stochastic Resonance  

E-print Network

We demonstrate the appearance of a purely entropic stochastic resonance (ESR) occurring in a geometrically confined system, where the irregular boundaries cause entropic barriers. The interplay between a periodic input signal, a constant bias and intrinsic thermal noise leads to a resonant ESR-phenomenon in which feeble signals become amplified. This new phenomenon is characterized by the presence of two peaks in the spectral amplification at corresponding optimal values of the noise strength. The main peak is associated with the manifest stochastic resonance synchronization mechanism involving the inter-well noise-activated dynamics while a second peak relates to a regime of optimal sensitivity for intra-well dynamics. The nature of ESR, occurring when the origin of the barrier is entropic rather than energetic, offers new perspectives for novel investigations and potential applications. ESR by itself presents yet another case where one constructively can harvest noise in driven nonequilibrium systems.

P. S. Burada; G. Schmid; D. Reguera; J. M. Rubi; P. Hnggi

2009-08-24

148

Stochasticity and evolutionary stability.  

PubMed

In stochastic dynamical systems, different concepts of stability can be obtained in different limits. A particularly interesting example is evolutionary game theory, which is traditionally based on infinite populations, where strict Nash equilibria correspond to stable fixed points that are always evolutionarily stable. However, in finite populations stochastic effects can drive the system away from strict Nash equilibria, which gives rise to a new concept for evolutionary stability. The conventional and the new stability concepts may apparently contradict each other leading to conflicting predictions in large yet finite populations. We show that the two concepts can be derived from the frequency dependent Moran process in different limits. Our results help to determine the appropriate stability concept in large finite populations. The general validity of our findings is demonstrated showing that the same results are valid employing vastly different co-evolutionary processes. PMID:17025470

Traulsen, Arne; Pacheco, Jorge M; Imhof, Lorens A

2006-08-01

149

Stochastically ordered multiple regression  

PubMed Central

In various application areas, prior information is available about the direction of the effects of multiple predictors on the conditional response distribution. For example, in epidemiology studies of potentially adverse exposures and continuous health responses, one can typically assume a priori that increasing the level of an exposure does not lead to an improvement in the health response. Such an assumption can be formalized through a stochastic ordering assumption in each of the exposures, leading to a potentially large improvement in efficiency in nonparametric modeling of the conditional response distribution. This article proposes a Bayesian nonparametric approach to this problem based on characterizing the conditional response density as a Gaussian mixture, with the locations of the Gaussian means varying flexibly with predictors subject to minimal constraints to ensure stochastic ordering. Theoretical properties are considered and Markov chain Monte Carlo methods are developed for posterior computation. The methods are illustrated using simulation examples and a reproductive epidemiology application. PMID:20150656

Bornkamp, Bjrn; Ickstadt, Katja; Dunson, David

2010-01-01

150

Stochastic resonance without tuning  

Microsoft Academic Search

STOCHASTIC resonance1-4 (SR) is a phenomenon wherein the response of a nonlinear system to a weak periodic input signal is optimized by the presence of a particular, non-zero level of noise5 -7. SR has been proposed as a means for improving signal detection in a wide variety of systems, including superconducting quantum interference devices8, and may be used in some

J. J. Collins; Carson C. Chow; Thomas T. Imhoff

1995-01-01

151

QoS Architecture for a Mobile Ad Hoc Network  

Microsoft Academic Search

Dynamic allocation of network resources in packet-based mobile ad hoc networks requires the operation of autonomous mechanisms that can provide assurance that the user or host application can reasonably expect a satisfactory quality-of-service (QoS). In general, a combination of mechanisms is required to operate concurrently and in real-time to meet this objective. This paper discusses an architectural framework for a

Richard C. Bernhardt; J. Bibb Cain; William A. Windham

2007-01-01

152

Control Allocation with Load Balancing  

NASA Technical Reports Server (NTRS)

Next generation aircraft with a large number of actuators will require advanced control allocation methods to compute the actuator commands needed to follow desired trajectories while respecting system constraints. Previously, algorithms were proposed to minimize the l1 or l2 norms of the tracking error and of the actuator deflections. The paper discusses the alternative choice of the l(infinity) norm, or sup norm. Minimization of the control effort translates into the minimization of the maximum actuator deflection (min-max optimization). The paper shows how the problem can be solved effectively by converting it into a linear program and solving it using a simplex algorithm. Properties of the algorithm are also investigated through examples. In particular, the min-max criterion results in a type of load balancing, where the load is th desired command and the algorithm balances this load among various actuators. The solution using the l(infinity) norm also results in better robustness to failures and to lower sensitivity to nonlinearities in illustrative examples.

Bodson, Marc; Frost, Susan A.

2009-01-01

153

Prospect and Markowitz Stochastic Dominance  

Microsoft Academic Search

Levy and Levy (2002, 2004) develop the Prospect and Markowitz stochastic dominance theory with S-shaped and reverse S-shaped utility functions for investors. In this paper, we extend Levy and Levys Prospect Stochastic Dominance theory (PSD) and Markowitz Stochastic Dominance theory (MSD) to the first three orders and link the corresponding S-shaped and reverse S-shaped utility functions to the first three

Wing-Keung Wong; Raymond H. Chan

2005-01-01

154

Quantum Stochastic Convolution Cocycles II  

Microsoft Academic Search

Schrmanns theory of quantum Lvy processes, and more generally the theory of quantum stochastic convolution cocycles, is\\u000a extended to the topological context of compact quantum groups and operator space coalgebras. Quantum stochastic convolution\\u000a cocycles on a C*-hyperbialgebra, which are Markov-regular, completely positive and contractive, are shown to satisfy coalgebraic quantum\\u000a stochastic differential equations with completely bounded coefficients, and the structure

J. Martin Lindsay; Adam G. Skalski

2008-01-01

155

A retrodictive stochastic simulation algorithm  

SciTech Connect

In this paper we describe a simple method for inferring the initial states of systems evolving stochastically according to master equations, given knowledge of the final states. This is achieved through the use of a retrodictive stochastic simulation algorithm which complements the usual predictive stochastic simulation approach. We demonstrate the utility of this new algorithm by applying it to example problems, including the derivation of likely ancestral states of a gene sequence given a Markovian model of genetic mutation.

Vaughan, T.G. [Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Melbourne VIC 3122 (Australia)], E-mail: tvaughan@swin.edu.au; Drummond, P.D. [Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Melbourne VIC 3122 (Australia); Drummond, A.J. [Department of Computer Science, University of Auckland, Private Bag 92019, Auckland 1142 (New Zealand)

2010-05-20

156

AdS null deformations with inhomogeneities  

NASA Astrophysics Data System (ADS)

We study AdSX null deformations arising as near horizon limits of D3-brane analogs of inhomogeneous plane waves. Restricting to normalizable deformations for the AdS5 case, these generically correspond in the dual field theory to super Yang-Mills states with light cone momentum density T++ varying spatially, the homogeneous case studied in [K. Narayan, arXiv:1202.5935] corresponding to uniform T++. All of these preserve some supersymmetry. Generically these inhomogeneous solutions exhibit analogs of horizons in the interior where a timelike Killing vector becomes null. From the point of view of x+-dimensional reduction, the circle pinches off on these horizon loci in the interior. We discuss similar inhomogeneous solutions with asymptotically Lifshitz boundary conditions, as well as aspects of Lifshitz singularities in string constructions involving anti-de Sitter null deformations. We also briefly discuss holographic entanglement entropy for some of these.

Narayan, K.

2012-12-01

157

Fund allocation using capacitated vehicle routing problem  

NASA Astrophysics Data System (ADS)

In investment fund allocation, it is unwise for an investor to distribute his fund into several assets simultaneously due to economic reasons. One solution is to allocate the fund into a particular asset at a time in a sequence that will either maximize returns or minimize risks depending on the investor's objective. The vehicle routing problem (VRP) provides an avenue to this issue. VRP answers the question on how to efficiently use the available fleet of vehicles to meet a given service demand, subjected to a set of operational requirements. This paper proposes an idea of using capacitated vehicle routing problem (CVRP) to optimize investment fund allocation by employing data of selected stocks in the FTSE Bursa Malaysia. Results suggest that CRVP can be applied to solve the issue of investment fund allocation and increase the investor's profit.

Mamat, Nur Jumaadzan Zaleha; Jaaman, Saiful Hafizah; Ahmad, Rokiah Rozita; Darus, Maslina

2014-09-01

158

42 CFR 24.2 - Allocation.  

Code of Federal Regulations, 2010 CFR

...2 Section 24.2 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES PERSONNEL SENIOR BIOMEDICAL RESEARCH SERVICE 24.2 Allocation. (a) The Secretary, within the number authorized in the PHS Act,...

2010-10-01

159

42 CFR 24.2 - Allocation.  

Code of Federal Regulations, 2011 CFR

...2 Section 24.2 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES PERSONNEL SENIOR BIOMEDICAL RESEARCH SERVICE 24.2 Allocation. (a) The Secretary, within the number authorized in the PHS Act,...

2011-10-01

160

METHODS OF ANALYSIS FOR WASTE LOAD ALLOCATION  

EPA Science Inventory

This research has addressed several unresolved questions concerning the allocation of allowable waste loads among multiple wastewater dischargers within a water quality limited stream segment. First, the traditional assumptions about critical design conditions for waste load allo...

161

Adaptively Parallel Processor Allocation for Cilk Jobs  

E-print Network

The problem of allocating processor resources fairly and efficiently to parallel jobs has been studied extensively in the past. Most of this work, however, assumes that the instantaneous parallelism of the jobs is known ...

Sen, Siddhartha

162

Asynchronous Decentralized Task Allocation for Dynamic Environments  

E-print Network

This work builds on a decentralized task allocation algorithm for networked agents communicating through an asynchronous channel, by extending the Asynchronous Consensus-Based Bundle Algorithm (ACBBA) to account for more ...

Johnson, Luke B.

163

42 CFR 24.2 - Allocation.  

Code of Federal Regulations, 2013 CFR

... Allocation. (a) The Secretary, within the number authorized...Policy Board may advise the Secretary to make adjustments to the...recruit or retain scientific talent. (e) The Secretary will ensure that SBRS...

2013-10-01

164

42 CFR 24.2 - Allocation.  

Code of Federal Regulations, 2012 CFR

... Allocation. (a) The Secretary, within the number authorized...Policy Board may advise the Secretary to make adjustments to the...recruit or retain scientific talent. (e) The Secretary will ensure that SBRS...

2012-10-01

165

42 CFR 24.2 - Allocation.  

Code of Federal Regulations, 2014 CFR

... Allocation. (a) The Secretary, within the number authorized...Policy Board may advise the Secretary to make adjustments to the...recruit or retain scientific talent. (e) The Secretary will ensure that SBRS...

2014-10-01

166

Decentralized task allocation for dynamic environments  

E-print Network

This thesis presents an overview of the design process for creating greedy decentralized task allocation algorithms and outlines the main decisions that progressed the algorithm through three different forms. The first ...

Johnson, Luke B

2012-01-01

167

10 CFR 490.503 - Credit allocation.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 2012-01-01 false Credit allocation. 490.503 Section 490.503 Energy DEPARTMENT OF ENERGY ENERGY CONSERVATION ALTERNATIVE FUEL TRANSPORTATION PROGRAM Alternative Fueled Vehicle Credit Program 490.503...

2012-01-01

168

10 CFR 490.503 - Credit allocation.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Credit allocation. 490.503 Section 490.503 Energy DEPARTMENT OF ENERGY ENERGY CONSERVATION ALTERNATIVE FUEL TRANSPORTATION PROGRAM Alternative Fueled Vehicle Credit Program 490.503...

2010-01-01

169

10 CFR 490.503 - Credit allocation.  

Code of Federal Regulations, 2014 CFR

...2014-01-01 2014-01-01 false Credit allocation. 490.503 Section 490.503 Energy DEPARTMENT OF ENERGY ENERGY CONSERVATION ALTERNATIVE FUEL TRANSPORTATION PROGRAM Alternative Fueled Vehicle Credit Program 490.503...

2014-01-01

170

10 CFR 490.503 - Credit allocation.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Credit allocation. 490.503 Section 490.503 Energy DEPARTMENT OF ENERGY ENERGY CONSERVATION ALTERNATIVE FUEL TRANSPORTATION PROGRAM Alternative Fueled Vehicle Credit Program 490.503...

2011-01-01

171

10 CFR 490.503 - Credit allocation.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 2013-01-01 false Credit allocation. 490.503 Section 490.503 Energy DEPARTMENT OF ENERGY ENERGY CONSERVATION ALTERNATIVE FUEL TRANSPORTATION PROGRAM Alternative Fueled Vehicle Credit Program 490.503...

2013-01-01

172

50 CFR 660.55 - Allocations.  

Code of Federal Regulations, 2014 CFR

...includes limited entry fixed gear, directed open access...Fishery harvest guidelines and reductions made prior to fishery allocations...nontrawl (limited entry fixed gear, open access, and recreational...between the limited entry fixed gear, open access, and...

2014-10-01

173

50 CFR 660.55 - Allocations.  

Code of Federal Regulations, 2010 CFR

...includes limited entry fixed gear, open access, and...Fishery harvest guidelines and reductions made prior to fishery allocations...nontrawl (limited entry fixed gear, open access, and recreational...between the limited entry fixed gear, open access, and...

2010-10-01

174

50 CFR 660.55 - Allocations.  

Code of Federal Regulations, 2012 CFR

...includes limited entry fixed gear, directed open access...Fishery harvest guidelines and reductions made prior to fishery allocations...nontrawl (limited entry fixed gear, open access, and recreational...between the limited entry fixed gear, open access, and...

2012-10-01

175

50 CFR 660.55 - Allocations.  

Code of Federal Regulations, 2013 CFR

...includes limited entry fixed gear, directed open access...Fishery harvest guidelines and reductions made prior to fishery allocations...nontrawl (limited entry fixed gear, open access, and recreational...between the limited entry fixed gear, open access, and...

2013-10-01

176

50 CFR 660.55 - Allocations.  

Code of Federal Regulations, 2011 CFR

...includes limited entry fixed gear, directed open access...Fishery harvest guidelines and reductions made prior to fishery allocations...nontrawl (limited entry fixed gear, open access, and recreational...between the limited entry fixed gear, open access, and...

2011-10-01

177

Memory Allocation Costs in Large C and C++ Programs  

Microsoft Academic Search

Dynamic storage allocation is an important part of a large class of computer programs writtenin C and C++. High-performance algorithms for dynamic storage allocation have been, and willcontinue to be, of considerable interest. This paper presents detailed measurements of the cost ofdynamic storage allocation in 11 diverse C and C++ programs using five very different dynamicstorage allocation implementations, including a

David Detlefs; Al Dosser; Benjamin G. Zorn

1994-01-01

178

Winding Strings in AdS_3  

E-print Network

Correlation functions of one unit spectral flowed states in string theory on AdS_3 are considered. We present the modified Knizhnik-Zamolodchikov and null vector equations to be satisfied by amplitudes containing states in winding sector one and study their solution corresponding to the four point function including one w=1 field. We compute the three point function involving two one unit spectral flowed operators and find expressions for amplitudes of three w=1 states satisfying certain particular relations among the spins of the fields. Several consistency checks are performed.

Estanislao Herscovich; Pablo Minces; Carmen Nunez

2005-12-15

179

Optimality versus stability in water resource allocation.  

PubMed

Water allocation is a growing concern in a developing world where limited resources like fresh water are in greater demand by more parties. Negotiations over allocations often involve multiple groups with disparate social, economic, and political status and needs, who are seeking a management solution for a wide range of demands. Optimization techniques for identifying the Pareto-optimal (social planner solution) to multi-criteria multi-participant problems are commonly implemented, although often reaching agreement for this solution is difficult. In negotiations with multiple-decision makers, parties who base decisions on individual rationality may find the social planner solution to be unfair, thus creating a need to evaluate the willingness to cooperate and practicality of a cooperative allocation solution, i.e., the solution's stability. This paper suggests seeking solutions for multi-participant resource allocation problems through an economics-based power index allocation method. This method can inform on allocation schemes that quantify a party's willingness to participate in a negotiation rather than opt for no agreement. Through comparison of the suggested method with a range of distance-based multi-criteria decision making rules, namely, least squares, MAXIMIN, MINIMAX, and compromise programming, this paper shows that optimality and stability can produce different allocation solutions. The mismatch between the socially-optimal alternative and the most stable alternative can potentially result in parties leaving the negotiation as they may be too dissatisfied with their resource share. This finding has important policy implications as it justifies why stakeholders may not accept the socially optimal solution in practice, and underlies the necessity of considering stability where it may be more appropriate to give up an unstable Pareto-optimal solution for an inferior stable one. Authors suggest assessing the stability of an allocation solution as an additional component to an analysis that seeks to distribute water in a negotiated process. PMID:24412983

Read, Laura; Madani, Kaveh; Inanloo, Bahareh

2014-01-15

180

MERTON'S PORTFOLIO OPTIMIZATION PROBLEM IN A BLACK AND SCHOLES MARKET WITH NON-GAUSSIAN STOCHASTIC VOLATILITY OF ORNSTEIN-UHLENBECK TYPE  

Microsoft Academic Search

We study Merton's classical portfolio optimization problem for an investor who can trade in a risk-free bond and a stock. The goal of the investor is to allocate money so that her expected utility from terminal wealth is maximized. The special feature of the problem studied in this paper is the inclusion of stochastic volatility in the dynamics of the

FRED ESPEN BENTH; KRISTIN REIKVAM

2001-01-01

181

Genetically Engineered Food AD  

NSDL National Science Digital Library

How has biotechnology been used to improve the quality of food available today? Students are placed in groups of 2 to create an advertisement for a genetically engineered food and are then asked to present their ad. The ads are created with small poster board or paper, markers, and construction paper. Students also use the computer for lettering and clip art. If enough computers and suitable software was available, the ads could be completely done on the computer.

BEGIN:VCARD VERSION:2.1 FN:Lana Hays N:Hays;Lana ORG:Saint Henry District High School REV:2005-04-11 END:VCARD

2005-04-11

182

Banner Ad Placement Study  

NSDL National Science Digital Library

Webreference.com (discussed in the April 19, 1996 Scout Report) has recently added this interesting and thought-provoking resource to its site. The resource presents the results of a study of banner ad placement at webreference.com, conducted between March 25 and April 15, 1997 by three University of Michigan School of Business Administration students. The study concludes that changes in placement of banner ads affects "click-through" rates.

Doyle, Kim.; Minor, Anastasia.; Weyrich, Carolyn.

1997-01-01

183

Stability analysis of multi-group deterministic and stochastic epidemic models with vaccination rate  

NASA Astrophysics Data System (ADS)

We discuss in this paper a deterministic multi-group MSIR epidemic model with a vaccination rate, the basic reproduction number ?0, a key parameter in epidemiology, is a threshold which determines the persistence or extinction of the disease. By using Lyapunov function techniques, we show if ?0 is greater than 1 and the deterministic model obeys some conditions, then the disease will prevail, the infective persists and the endemic state is asymptotically stable in a feasible region. If ?0 is less than or equal to 1, then the infective disappear so the disease dies out. In addition, stochastic noises around the endemic equilibrium will be added to the deterministic MSIR model in order that the deterministic model is extended to a system of stochastic ordinary differential equations. In the stochastic version, we carry out a detailed analysis on the asymptotic behavior of the stochastic model. In addition, regarding the value of ?0, when the stochastic system obeys some conditions and ?0 is greater than 1, we deduce the stochastic system is stochastically asymptotically stable. Finally, the deterministic and stochastic model dynamics are illustrated through computer simulations.

Wang, Zhi-Gang; Gao, Rui-Mei; Fan, Xiao-Ming; Han, Qi-Xing

2014-09-01

184

Topologically massive gravity on AdS2 spacetimes  

Microsoft Academic Search

We study the topologically massive gravity with a negative cosmological constant on AdS2 spacetimes by making use of Kaluza-Klein dimensional reduction. For a constant dilaton, this two-dimensional model admits three AdS2 vacuum solutions, which are related to AdS3 and warped AdS3 with an identification upon uplifting three dimensions. We carry out perturbation analysis around these backgrounds to find what is

Yun Soo Myung; Yong-Wan Kim; Young-Jai Park

2009-01-01

185

Nonlinear realization of supersymmetric AdS space isometries  

Microsoft Academic Search

The isometries of AdS(5) space and supersymmetric AdS(5)circle times S-1 space are nonlinearly realized on four-dimensional Minkowski space. The resultant effective actions in terms of the Nambu-Goldstone modes are constructed. The dilatonic mode governing the motion of the Minkowski space probe brane into the covolume of supersymmetric AdS(5) space is found to be unstable and the bulk of the AdS(5)

T. E. Clark; S. T. Love

2006-01-01

186

50 CFR Table 1b to Part 660... - 2011, Allocations by Species or Species Group (Weights in Metric Tons)  

Code of Federal Regulations, 2012 CFR

...the total trawl allocation of canary rockfish is allocated to the whiting fisheries...total trawl allocation for darkblotched rockfish is allocated to the whiting fisheries...the total trawl allocation for widow rockfish is allocated to the whiting...

2012-10-01

187

50 CFR Table 1b to Part 660... - 2011, Allocations by Species or Species Group (Weights in Metric Tons)  

Code of Federal Regulations, 2011 CFR

...the total trawl allocation of canary rockfish is allocated to the whiting fisheries...total trawl allocation for darkblotched rockfish is allocated to the whiting fisheries...the total trawl allocation for widow rockfish is allocated to the whiting...

2011-10-01

188

Stochastic Optimization for Machine Learning  

E-print Network

Stochastic Optimization for Machine Learning ICML 2010, Haifa, Israel Tutorial by Nati Srebro Descent: formulation, analysis and use in machine learning · Learn about extensions and generalizations, and their Machine Learning counterparts Main Goal: Machine Learning is Stochastic Optimization #12;Outline

Powell, Warren B.

189

STOCHASTIC CONTROL OF BEAM DYNAMICS  

Microsoft Academic Search

The methods of stochastic control theory are proposed in the context of charged-particle beam dynamics. The stochastic dynamics that is introduced here is invariant for time reversal and can be easily recast in the form of a Schrodinger-like equation where Planck's constant is re- placed by the beam emittance. It changes a bilinear control problem for Schrodinger equation in a

N. Cufaro-Petroni; S. De Martino; F. Illuminati

190

Bond Markets with Stochastic Volatility  

E-print Network

Bond Markets with Stochastic Volatility Rafael DeSantiago Jean-Pierre Fouque Knut Sølna September 27, 2007 Abstract We analyze stochastic volatility effects in the context of the bond market- nection to defaultable bonds. Contents 1 Introduction 2 2 Pricing Bonds 3 2.1 The Term Structure Equation

Solna, Knut

191

An Analysis and Allocation System for Library Collections Budgets: The Comprehensive Allocation Process (CAP)  

ERIC Educational Resources Information Center

The "Comprehensive Allocation Process" (CAP) is a reproducible decision-making structure for the allocation of new collections funds, for the reallocation of funds within stagnant budgets, and for budget cuts in the face of reduced funding levels. This system was designed to overcome common shortcomings of current methods. Its philosophical

Lyons, Lucy Eleonore; Blosser, John

2012-01-01

192

Joint Buffer & Server Allocation Van Woensel et al. Buffer and Server Allocation in General  

E-print Network

Joint Buffer & Server Allocation Van Woensel et al. Buffer and Server Allocation in General Multi-Server Abstract -- This paper deals with the joint optimization of the number of buffers and servers, an important issue since buffers and servers represent a significant amount of investment for many companies

Cruz, Frederico

193

Optimal server allocation typeset May 6, 2009 Smith, Cruz, & van Woensel Optimal Server Allocation in General,  

E-print Network

Optimal server allocation typeset May 6, 2009 Smith, Cruz, & van Woensel Optimal Server Allocation in General, Finite, Multi-Server Queueing Networks J. MacGregor Smith F. R. B. Cruz T. van Woensel jmsmith, mul- tiple servers, arbitrary acyclic, series-parallel topologies, and general service time

Cruz, Frederico

194

Aeronautical ad hoc networks  

Microsoft Academic Search

There has been an enormous growth in mobile ad hoc networks (MANETs) in land based small to medium size networks with relatively strict power and resources. In this paper the concept of ad hoc networking between aircraft is introduced, which can be considered as a novel approach in increasing the data rate and practicality of future in-flight broadband Internet access.

Ehssan Sakhaee; Abbas Jamalipour; Nei Kato

2006-01-01

195

Banach space valued stochastic differential equations  

SciTech Connect

Let W(t,[omega]) be a Brownian motion on an abstract Wiener space (i,H,B) corresponding to the canonical normal distribution of H. The well known theorem of Girsanov is proved for such a process with the perturbing term taking values in the Hilbert space H. Consider the stochastic integral equation [xi](t) = x + [integral][sub o][sup t] A(s,[xi](s))dW (s) + [integral][sub o][sup t] [sigma](s,[xi](s))ds where x is in B, A([center dot],[center dot]) and [sigma]([center dot],[center dot]) are bounded continuous functions from O,[infinity] x B to I + L[sub 2](H) and H respectively. Here L[sub 2](H) denotes the collection of Hilbert Schmidt operators on H. Furthermore, suppose for every s [ge] O the restriction of A(s,[center dot]) to H is invertible and A(s,[center dot]) and [sigma](s,[center dot]) are both Frechet differentiable in the directions of H with bounded derivatives. Under suitable conditions, it is proved that for each t [ge] O, the measure generated by the solution [xi](t) of the above stochastic integral equation is differentiable in the directions of H in the sense of Fomin. By adding more conditions on A and [sigma], it is shown that the transition probability associated with the solution of the stochastic differential equation d[xi](t) = A(t,[xi](t))dW (t) + [sigma](t,[xi])dt satisfies the infinite dimensional Kolmogorov's forward equation in the distribution sense.

Asadian, F.

1992-01-01

196

Stochastic power flow modeling  

SciTech Connect

The stochastic nature of customer demand and equipment failure on large interconnected electric power networks has produced a keen interest in the accurate modeling and analysis of the effects of probabilistic behavior on steady state power system operation. The principle avenue of approach has been to obtain a solution to the steady state network flow equations which adhere both to Kirchhoff's Laws and probabilistic laws, using either combinatorial or functional approximation techniques. Clearly the need of the present is to develop sound techniques for producing meaningful data to serve as input. This research has addressed this end and serves to bridge the gap between electric demand modeling, equipment failure analysis, etc., and the area of algorithm development. Therefore, the scope of this work lies squarely on developing an efficient means of producing sensible input information in the form of probability distributions for the many types of solution algorithms that have been developed. Two major areas of development are described in detail: a decomposition of stochastic processes which gives hope of stationarity, ergodicity, and perhaps even normality; and a powerful surrogate probability approach using proportions of time which allows the calculation of joint events from one dimensional probability spaces.

Not Available

1980-06-01

197

Stochastic Quantum Gas Dynamics  

NASA Astrophysics Data System (ADS)

We study the dynamics of weakly-interacting finite temperature Bose gases via the Stochastic Gross-Pitaevskii equation (SGPE). As a first step, we demonstrate [jointly with A. Negretti (Ulm, Germany) and C. Henkel (Potsdam, Germany)] that the SGPE provides a significantly better method for generating an equilibrium state than the number-conserving Bogoliubov method (except for low temperatures and small atom numbers). We then study [jointly with H. Nistazakis and D.J. Frantzeskakis (University of Athens, Greece), P.G.Kevrekidis (University of Massachusetts) and T.P. Horikis (University of Ioannina, Greece)] the dynamics of dark solitons in elongated finite temperature condensates. We demonstrate numerical shot-to-shot variations in soliton trajectories (S.P. Cockburn et al., arXiv:0909.1660.), finding individual long-lived trajectories as in experiments. In our simulations, these variations arise from fluctuations in the phase and density of the underlying medium. We provide a detailed statistical analysis, proposing regimes for the controlled experimental demonstration of this effect; we also discuss the extent to which simpler models can be used to mimic the features of ensemble-averaged stochastic trajectories.

Proukakis, Nick P.; Cockburn, Stuart P.

2010-03-01

198

Stochastic ordering of extreme value distributions  

Microsoft Academic Search

We investigate the second-order stochastic ordering of the extreme value distributions within each of three families: the Gumbel distribution, the Frechet distribution, and the Weibull distribution. We give conditions for second-order stochastic dominance, conditional second-order stochastic dominance, and order statistics second-order stochastic dominance within the three families

Ganghuai Wang; James H. Lambert; Yacov Y. Haimes

1999-01-01

199

[Organ allocation system: between efficiency and equity].  

PubMed

Despite considerable efforts to promote organ donation and increase the amount of organ retrieval, demand for grafts is increasing and remains much higher then availability. This short supply is noticeable for all organ transplantation whether for heart, lungs, liver or pancreas but mainly for kidneys. The objective of graft allocation and attribution rules is to insure an allocation as fair as possible, to find the best recipient, to take into account the emergency of the need for grafting or the access difficulty for certain patients, and to seek optimal graft usage. These rules are based on the setting up of priority categories for patients whose lives are threatened on a very short-term basis or for those having difficult access to transplantation. This implies the issue of seeking the balance between an allocation as fair as possible and technical constraints associated with organ retrieval, transportation and graft quality preservation. PMID:17578026

Antoine, Corinne

2007-02-15

200

Distributed Resource Allocation for Epidemic control  

E-print Network

We present a distributed resource allocation strategy to control an epidemic outbreak in a networked population based on a Distributed Alternating Direction Method of Multipliers (D-ADMM) algorithm. We consider a linearized Susceptible- Infected-Susceptible (SIS) epidemic spreading model in which agents in the network are able to allocate vaccination resources (for prevention) and antidotes (for treatment) in the presence of a contagion. We express our epidemic control condition as a spectral constraint involving the Perron-Frobenius eigenvalue, and formulate the resource allocation problem as a Geometric Program (GP). Next, we separate the network-wide optimization problem into subproblems optimally solved by each agent in a fully distributed way. We conclude the paper by illustrating performance of our solution framework with numerical simulations.

Enyioha, Chinwendu; Preciado, Victor; Pappas, George J

2015-01-01

201

Biomass Resource Allocation among Competing End Uses  

SciTech Connect

The Biomass Scenario Model (BSM) is a system dynamics model developed by the U.S. Department of Energy as a tool to better understand the interaction of complex policies and their potential effects on the biofuels industry in the United States. However, it does not currently have the capability to account for allocation of biomass resources among the various end uses, which limits its utilization in analysis of policies that target biomass uses outside the biofuels industry. This report provides a more holistic understanding of the dynamics surrounding the allocation of biomass among uses that include traditional use, wood pellet exports, bio-based products and bioproducts, biopower, and biofuels by (1) highlighting the methods used in existing models' treatments of competition for biomass resources; (2) identifying coverage and gaps in industry data regarding the competing end uses; and (3) exploring options for developing models of biomass allocation that could be integrated with the BSM to actively exchange and incorporate relevant information.

Newes, E.; Bush, B.; Inman, D.; Lin, Y.; Mai, T.; Martinez, A.; Mulcahy, D.; Short, W.; Simpkins, T.; Uriarte, C.; Peck, C.

2012-05-01

202

Evolution of longevity through optimal resource allocation  

PubMed Central

Models of life history evolution predict optimal traits of a simplified organism under various environmental conditions, but they at most acknowledge the existence of ageing. On the other hand, genetic models of ageing do not consider the effects of ageing on life histroy traits other than fecundity and longevity. This paper reports the results of a dynamic programming model which optimizes resource allocation to growth, reproduction and somatic repair. A low extrinsic (environmentally caused) mortality rate and high repair efficiency promote allocation to repair, especially early in life, resulting in delayed ageing and low growth rates, delayed maturity, large body size and dramatic enhancement of survival and maximum lifespan. The results are generally consistent with field, comprative and experimental data. They also suggest that the relationships between maximum lifespan and age at maturity and body size observed in nature may be by-products of optimal allocation strategies.

Cicho?, M.

1997-01-01

203

Trade in Value Added and the Valued Added in Trade  

Microsoft Academic Search

This paper discussed two measures of value added flows between countries Trade in value added accounts for value added of one country directly and indirectly embodied in final consumption of another country. Value added in trade measures the value added embodied in gross trade flows. The paper shows that both measures result in the same overall net trade of a

Robert Stehrer

2012-01-01

204

Recently Added Antibodies  

Cancer.gov

Reagents Data Portal AntibodiesNCI announces the release of monoclonal antipeptide antibodies from rabbit for distribution on the antibody portal. There are 60 recently added monoclonal antibodies, with 56 generated from mouse and 4 generated from rabbit. Print

205

Adding and Subtracting  

NSDL National Science Digital Library

Test your brain at some addition and subtraction! Practice adding and subtracting on a number line using Line Jumper. When playing Alien Munchtime (addition) and Alien Munchtime (subtraction) select levels 1-9 and press play. ...

Miss Sullivan

2011-10-21

206

Ad Hoc Advisors  

Cancer.gov

The Long Island Breast Cancer Study Project (LIBCSP) had an Ad Hoc Advisory Committee of expert scientists and community breast cancer advocates. This committee was chaired by Dr. Mimi C. Yu. The committee met annually or as needed.

207

Prospect and Markowitz stochastic dominance  

Microsoft Academic Search

Levy and Wiener (J Risk Uncertain 16(2), 147163, 1998), Levy and Levy (Manage Sci 48(10), 13341349, 2002; Rev Fin Stud 17(4), 10151041, 2004) develop the prospect and Markowitz stochastic dominance theory with S-shaped and reverse S-shaped utility\\u000a functions for investors. In this paper, we extend their work on prospect stochastic dominance theory (PSD) and Markowitz stochastic\\u000a dominance theory (MSD) to

Wing-Keung Wong; Raymond H. Chan

2008-01-01

208

Stochastic Resonance: from climate to biology  

E-print Network

In this paper I will review some basic aspects of the mechanism of stochastic resonance. Stochastic resonance was first introduced as a possible mechanism to explain long term climatic variation. Since then, there have been many applications of stochastic resonance in physical and biological systems. I will show that in complex system, stochastic resonance can substantially change as a function of the ``system complexity''. Also, I will briefly mention how to apply stochastic resonance for the case of Brownian motors.

Roberto Benzi

2007-02-05

209

Economic Value Added  

Microsoft Academic Search

\\u000a Economic Value Added, kurz EVA, ist eine Methode bei der Finanzanalyse, die eingesetzt wird, um zu messen, ob ein Unternehmen\\u000a ber den Kapitalkosten der eingesetzten Assets Wert schafft. EVA misst den Wert, der in einer definierten Periode durch Erhhung\\u000a von Margen oder den modifizierten Einsatz unter-\\/ungenutzter Assets generiert wird. Der Economic Value Added einer Periode\\u000a ergibt sich als Residualgewinn, wenn

Christian Schawel; Fabian Billing

210

Economic Value Added  

Microsoft Academic Search

Economic Value Added, kurz EVA, ist eine Methode bei der Finanzanalyse, die eingesetzt wird, um zu messen, ob ein Unternehmen\\u000a ber den Kapitalkosten der eingesetzten Assets Wert schafft. EVA misst den Wert, der in einer definierten Periode durch Erhhung\\u000a von Margen oder den modifizierten Einsatz unter-\\/ungenutzter Assets generiert wird. Der Economic Value Added einer Periode\\u000a ergibt sich als Residualgewinn, wenn

Christian Schawel; Fabian Billing

211

Distributed Routing for Vehicular Ad Hoc Networks: Throughput-Delay Tradeoff  

E-print Network

. INTRODUCTION In vehicular ad hoc networks (VANETs), vehicles equipped with short-range radios communicate users at a lower cost. To support emerging vehicular networks, Dedicated Short Range Communication (DSRC, the FCC has allocated 75 MHz of the spectrum in the 5.9 GHz band to DSRC. The MAC and physical layer

Ghaderi, Majid

212

Cross-Layer Multicommodity Capacity Expansion on Ad Hoc Wireless Networks of Cognitive Radios  

E-print Network

Cross-Layer Multicommodity Capacity Expansion on Ad Hoc Wireless Networks of Cognitive Radios Alex, and multicommodity flow can achieve greater network performance over optimizing resource allocation at each layer / transport layer model using multicommodity flow. We next describe each of the three layers

213

Stochastic mechanics, trace dynamics, and differential space - a synthesis  

E-print Network

It is shown how Adler's trace dynamics can be applied to stochastic mechanics and other complex classical dynamical systems. Emergent non-commutivity due to the fractal nature of sample trajectories is closely related to the fact that the forward and backward time derivatives are different for these diffusions. A new variational approach to stochastic mechanics based on trace dynamics is introduced. It is shown that Yasue's method and Guerra and Morato's method can both be generalized to allow for any diffusion constant in a stochastic model of Schrodinger's equation, and that they can all also describe dissipative diffusion. Then it is shown that the trace dynamical theory seems to only describe dissipative diffusion unless an extra quantum mechanical potential term is added to the Hamiltonian. The differential space theory of Wiener and Siegel is reconsidered as a useful tool in this framework, and is generalized to stochastic processes instead of deterministic ones for the hidden trajectories of observables. It is proposed that the natural measure space for Wiener-Siegel theory is Haar measure for random unitary matrices. A new interpretation of the polychotomic algorithm is given.

Mark Davidson

2006-02-25

214

Impact of time delays on stochastic resonance in an ecological system describing vegetation  

NASA Astrophysics Data System (ADS)

In this paper, we investigate the stochastic resonance phenomenon in a vegetation ecological system with time delay, at which the vegetation dynamics is assumed to be disturbed by both intrinsic and extrinsic noises. The signal-to-noise ratio is calculated when a weak periodic signal is added to the system. The impacts of time delay ? and correlation strength k between two noises on the signal-to-noise ratio are discussed, respectively. Our research results show that: (i) the increase of ? or k can enhance the stochastic resonance in the signal-to-noise ratio as a function of intrinsic noise strength ?; (ii) on the contrary, the increase of ? or k can weaken the stochastic resonance in the signal-to-noise ratio as a function of extrinsic noise strength D; and (iii) the increase of ? can lead to double stochastic resonance phenomenon in the signal-to-noise ratio as a function of k.

Han, Qinglin; Yang, Tao; Zeng, Chunhua; Wang, Hua; Liu, Zhiqiang; Fu, Yunchang; Zhang, Chun; Tian, Dong

2014-08-01

215

Criteria for fairly allocating scarce health-care resources to genetic tests: which matter most?  

PubMed Central

The use of genetic tests is expanding rapidly. Given limited health-care budgets throughout Europe and few national coverage decisions specifically for genetic tests, decisions about allocating scarce resources to genetic tests are frequently ad hoc and left to lower-level decision makers. This study assesses substantive ethical and economic criteria to prioritize genetic services in a reasonable and fair manner. Principles for allocating health-care resources can be classified into four categories: need-based allocation; maximizing total benefits; treating people equally; and promoting and rewarding social usefulness. In the face of scarcity, the degree of an individual's need for medical intervention is an important criterion. Also, different economic concepts of efficiency are of relevance in the theory and practice of prioritizing genetic tests. Equity concerns are most likely to be relevant in terms of avoiding undesirable inequities, which may also set boundaries to the use of efficiency as a prioritization criterion. The aim of promoting and rewarding social usefulness is unlikely to be relevant to the question of what priority a genetic test should have in clinical practice. Further work is needed to select an appropriate set of criteria; operationalize them; and assign weights before some kind of standardized priority information can be added to information sources for genetic services. Besides the substantive criteria, formal considerations like those pointed out in the framework of accountability for reasonableness need to be considered in decision making. PMID:23921536

Rogowski, Wolf H; Grosse, Scott D; Schmidtke, Jrg; Marckmann, Georg

2014-01-01

216

On square-wave-driven stochastic resonance for energy harvesting in a bistable system  

NASA Astrophysics Data System (ADS)

Stochastic resonance is a physical phenomenon through which the throughput of energy within an oscillator excited by a stochastic source can be boosted by adding a small modulating excitation. This study investigates the feasibility of implementing square-wave-driven stochastic resonance to enhance energy harvesting. The motivating hypothesis was that such stochastic resonance can be efficiently realized in a bistable mechanism. However, the condition for the occurrence of stochastic resonance is conventionally defined by the Kramers rate. This definition is inadequate because of the necessity and difficulty in estimating white noise density. A bistable mechanism has been designed using an explicit analytical model which implies a new approach for achieving stochastic resonance in the paper. Experimental tests confirm that the addition of a small-scale force to the bistable system excited by a random signal apparently leads to a corresponding amplification of the response that we now term square-wave-driven stochastic resonance. The study therefore indicates that this approach may be a promising way to improve the performance of an energy harvester under certain forms of random excitation.

Su, Dongxu; Zheng, Rencheng; Nakano, Kimihiko; Cartmell, Matthew P.

2014-11-01

217

A physics-based stochastic approach to representing unresolved scales in ocean models  

NASA Astrophysics Data System (ADS)

Recently, there has been an enormous development to represent unresolved scales by stochastic processes. But current stochastic techniques remain imperfect because the physical properties of the subgridscale processes are either introduced a posteriori as in data-based approaches, or they are prescribed ad hoc by Gaussian closures as in order reduction techniques. In a unifying approach, we combine elements from deterministic physics-based parameterizations and stochastic techniques to give a self-contained stochastic representation of subgridscale interactions. In a nutshell, the largely fixed spatial patterns of the subgridscale interactions are represented by the interactions of the most-unstable modes, whereas the amplitudes of these interactions are assumed to be stochastic with their statistics given via the amplitude equations of the most-unstable modes. For an efficient implementation, we exploit new, powerful tools such as generalized eigenvalue solvers suited to compute targeted eigenmodes of large dimensional systems, and the Dynamical Orthogonal Field method to solve the stochastic differential equations which yields the entire probability distribution of the flow field. As a first demonstration, we discuss the stochastic representation of baroclinic turbulence in the double gyre circulation.

Viebahn, Jan; Dijkstra, Henk A.

2014-05-01

218

Assessing marginal water values in multipurpose multireservoir systems via stochastic programming  

NASA Astrophysics Data System (ADS)

The International Conference on Water and the Environment held in Dublin in 1992 emphasized the need to consider water as an economic good. Since water markets are usually absent or ineffective, the value of water cannot be directly derived from market activities but must rather be assessed through shadow prices. Economists have developed various valuation techniques to determine the economic value of water, especially to handle allocation issues involving environmental water uses. Most of the nonmarket valuation studies reported in the literature focus on long-run policy problems, such as permanent (re)allocations of water, and assume that the water availability is given. When dealing with short-run allocation problems, water managers are facing complex spatial and temporal trade-offs and must therefore be able to track site and time changes in water values across different hydrologic conditions, especially in arid and semiarid areas where the availability of water is a limiting and stochastic factor. This paper presents a stochastic programming approach for assessing the statistical distribution of marginal water values in multipurpose multireservoir systems where hydropower generation and irrigation crop production are the main economic activities depending on water. In the absence of a water market, the Lagrange multipliers correspond to shadow prices, and the marginal water values are the Lagrange multipliers associated with the mass balance equations of the reservoirs. The methodology is illustrated with a cascade of hydroelectric-irrigation reservoirs in the Euphrates river basin in Turkey and Syria.

Tilmant, A.; Pinte, D.; Goor, Q.

2008-12-01

219

30 CFR 206.260 - Allocation of washed coal.  

Code of Federal Regulations, 2010 CFR

... 2010-07-01 false Allocation of washed coal. 206.260 Section 206.260 Mineral Resources...REVENUE MANAGEMENT PRODUCT VALUATION Federal Coal 206.260 Allocation of washed coal. (a) When coal is subjected to...

2010-07-01

220

30 CFR 206.459 - Allocation of washed coal.  

Code of Federal Regulations, 2010 CFR

... 2010-07-01 false Allocation of washed coal. 206.459 Section 206.459 Mineral Resources...REVENUE MANAGEMENT PRODUCT VALUATION Indian Coal 206.459 Allocation of washed coal. (a) When coal is subjected to...

2010-07-01

221

Essays on the real and financial allocation of capital  

E-print Network

This dissertation consists of three papers studying how firms allocate real and financial capital, and how taxes, the labor market and asymmetric information affect these allocation decisions. The first paper studies the ...

Ramrez Verdugo, Arturo

2006-01-01

222

24 CFR 982.101 - Allocation of funding.  

Code of Federal Regulations, 2010 CFR

...tenant-based assistance program to HUD field offices. (b) Section 213(d) allocation. (1) Section 213(d) of the HCD Act of 1974 (42 U.S.C. 1439) establishes requirements for allocation of assisted housing budget authority. Some...

2010-04-01

223

47 CFR 73.182 - Engineering standards of allocation.  

Code of Federal Regulations, 2010 CFR

...Telecommunication 4 2010-10-01 2010-10-01 false Engineering standards of allocation. 73.182 Section 73.182...BROADCAST SERVICES AM Broadcast Stations 73.182 Engineering standards of allocation. (a) Sections...

2010-10-01

224

47 CFR 73.182 - Engineering standards of allocation.  

Code of Federal Regulations, 2012 CFR

...Telecommunication 4 2012-10-01 2012-10-01 false Engineering standards of allocation. 73.182 Section 73.182...BROADCAST SERVICES AM Broadcast Stations 73.182 Engineering standards of allocation. (a) Sections...

2012-10-01

225

47 CFR 73.182 - Engineering standards of allocation.  

Code of Federal Regulations, 2013 CFR

...Telecommunication 4 2013-10-01 2013-10-01 false Engineering standards of allocation. 73.182 Section 73.182...BROADCAST SERVICES AM Broadcast Stations 73.182 Engineering standards of allocation. (a) Sections...

2013-10-01

226

47 CFR 73.182 - Engineering standards of allocation.  

Code of Federal Regulations, 2011 CFR

...Telecommunication 4 2011-10-01 2011-10-01 false Engineering standards of allocation. 73.182 Section 73.182...BROADCAST SERVICES AM Broadcast Stations 73.182 Engineering standards of allocation. (a) Sections...

2011-10-01

227

Questions and Answer for Transplant Candidates about Lung Allocation Policy  

MedlinePLUS

... on prior experience with many types of 2 Transplant candidates lung allocation scores are calculated from the ... classification. How do I register as a lung transplant candidate under the lung allocation system? Your transplant ...

228

24 CFR 791.403 - Allocation of housing assistance.  

Code of Federal Regulations, 2012 CFR

...URBAN DEVELOPMENT (HOUSING ASSISTANCE PROGRAMS AND PUBLIC AND INDIAN HOUSING PROGRAMS) ALLOCATIONS OF HOUSING ASSISTANCE FUNDS Allocation of Budget...demolition or disposition of public housing, assistance in support of the...

2012-04-01

229

24 CFR 791.403 - Allocation of housing assistance.  

Code of Federal Regulations, 2013 CFR

...URBAN DEVELOPMENT (HOUSING ASSISTANCE PROGRAMS AND PUBLIC AND INDIAN HOUSING PROGRAMS) ALLOCATIONS OF HOUSING ASSISTANCE FUNDS Allocation of Budget...demolition or disposition of public housing, assistance in support of the...

2013-04-01

230

24 CFR 791.403 - Allocation of housing assistance.  

Code of Federal Regulations, 2014 CFR

...URBAN DEVELOPMENT (HOUSING ASSISTANCE PROGRAMS AND PUBLIC AND INDIAN HOUSING PROGRAMS) ALLOCATIONS OF HOUSING ASSISTANCE FUNDS Allocation of Budget...demolition or disposition of public housing, assistance in support of the...

2014-04-01

231

24 CFR 791.403 - Allocation of housing assistance.  

Code of Federal Regulations, 2010 CFR

...URBAN DEVELOPMENT (HOUSING ASSISTANCE PROGRAMS AND PUBLIC AND INDIAN HOUSING PROGRAMS) ALLOCATIONS OF HOUSING ASSISTANCE FUNDS Allocation of Budget...demolition or disposition of public housing, assistance in support of the...

2010-04-01

232

24 CFR 791.403 - Allocation of housing assistance.  

Code of Federal Regulations, 2011 CFR

...URBAN DEVELOPMENT (HOUSING ASSISTANCE PROGRAMS AND PUBLIC AND INDIAN HOUSING PROGRAMS) ALLOCATIONS OF HOUSING ASSISTANCE FUNDS Allocation of Budget...demolition or disposition of public housing, assistance in support of the...

2011-04-01

233

7 CFR 1493.4 - Criteria for country allocations.  

Code of Federal Regulations, 2013 CFR

...for country allocations. The criteria considered by CCC in reviewing proposals for country allocations under the GSM-102 or GSM-103 programs, will include, but not be limited to, the following: (a) Potential benefits that the...

2013-01-01

234

7 CFR 1493.4 - Criteria for country allocations.  

Code of Federal Regulations, 2012 CFR

...for country allocations. The criteria considered by CCC in reviewing proposals for country allocations under the GSM-102 or GSM-103 programs, will include, but not be limited to, the following: (a) Potential benefits that the...

2012-01-01

235

7 CFR 1493.4 - Criteria for country allocations.  

Code of Federal Regulations, 2014 CFR

...for country allocations. The criteria considered by CCC in reviewing proposals for country allocations under the GSM-102 or GSM-103 programs, will include, but not be limited to, the following: (a) Potential benefits that the...

2014-01-01

236

30 CFR 1206.260 - Allocation of washed coal.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 false Allocation of washed coal. 1206.260 Section 1206.260 Mineral...RESOURCES REVENUE PRODUCT VALUATION Federal Coal 1206.260 Allocation of washed coal. (a) When coal is subjected to...

2012-07-01

237

30 CFR 1206.260 - Allocation of washed coal.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Allocation of washed coal. 1206.260 Section 1206.260 Mineral...RESOURCES REVENUE PRODUCT VALUATION Federal Coal 1206.260 Allocation of washed coal. (a) When coal is subjected to...

2013-07-01

238

30 CFR 1206.459 - Allocation of washed coal.  

Code of Federal Regulations, 2014 CFR

...2014-07-01 false Allocation of washed coal. 1206.459 Section 1206.459 Mineral...RESOURCES REVENUE PRODUCT VALUATION Indian Coal 1206.459 Allocation of washed coal. (a) When coal is subjected to...

2014-07-01

239

30 CFR 1206.459 - Allocation of washed coal.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 false Allocation of washed coal. 1206.459 Section 1206.459 Mineral...RESOURCES REVENUE PRODUCT VALUATION Indian Coal 1206.459 Allocation of washed coal. (a) When coal is subjected to...

2012-07-01

240

30 CFR 1206.260 - Allocation of washed coal.  

Code of Federal Regulations, 2014 CFR

...2014-07-01 false Allocation of washed coal. 1206.260 Section 1206.260 Mineral...RESOURCES REVENUE PRODUCT VALUATION Federal Coal 1206.260 Allocation of washed coal. (a) When coal is subjected to...

2014-07-01

241

30 CFR 1206.459 - Allocation of washed coal.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Allocation of washed coal. 1206.459 Section 1206.459 Mineral...RESOURCES REVENUE PRODUCT VALUATION Indian Coal 1206.459 Allocation of washed coal. (a) When coal is subjected to...

2013-07-01

242

A Distributed Tasks Allocation Scheme in Multi-UAV Context  

Microsoft Academic Search

This paper deals with the task allocation problem in multi-robot systems. We propose a completely distributed architecture, where robots dynamically allocate their tasks while they are building their plans. We first focus on the problem of simple \\

Thomas Lemaire; Rachid Alami; Simon Lacroix

2004-01-01

243

7 CFR 235.4 - Allocation of funds to States.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Allocation of funds to States. 235.4 Section 235.4 Agriculture...NUTRITION PROGRAMS STATE ADMINISTRATIVE EXPENSE FUNDS 235.4 Allocation of funds to States. (a) Nondiscretionary SAE...

2011-01-01

244

7 CFR 235.4 - Allocation of funds to States.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Allocation of funds to States. 235.4 Section 235.4 Agriculture...NUTRITION PROGRAMS STATE ADMINISTRATIVE EXPENSE FUNDS 235.4 Allocation of funds to States. (a) Nondiscretionary SAE...

2010-01-01

245

Optimal Energy Allocation and Admission Control for Communications Satellites  

E-print Network

1 Optimal Energy Allocation and Admission Control for Communications Satellites Alvin Fu, Eytan control for communications satellites in earth orbit. These satellites receive requests for transmis- sion allocation problems in wireless commu- nications. Keywords-- Satellite, Communication, Resource Alloca- tion

Modiano, Eytan

246

26 CFR 26.2632-1 - Allocation of GST exemption.  

Code of Federal Regulations, 2010 CFR

...trust by the same transferor. (b) Lifetime allocations (1) Automatic allocation...skip occurs during the transferor's lifetime, the transferor's GST exemption...transferred during the transferor's lifetime, other than in a direct...

2010-04-01

247

75 FR 32495 - Operating Fund Subsidies Allocation Formula  

Federal Register 2010, 2011, 2012, 2013, 2014

...Operating Fund Subsidies Allocation Formula AGENCY: Office of the Chief Information...which assistance is determined using a formula approach under the Operating Fund Program...Operating Fund Subsidies Allocation Formula. OMB Approval Number:...

2010-06-08

248

30 CFR 1206.260 - Allocation of washed coal.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 false Allocation of washed coal. 1206.260 Section 1206.260 Mineral...Resources Revenue PRODUCT VALUATION Federal Coal 1206.260 Allocation of washed coal. (a) When coal is subjected to...

2011-07-01

249

30 CFR 1206.459 - Allocation of washed coal.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 false Allocation of washed coal. 1206.459 Section 1206.459 Mineral...Resources Revenue PRODUCT VALUATION Indian Coal 1206.459 Allocation of washed coal. (a) When coal is subjected to...

2011-07-01

250

7 CFR 3430.311 - Allocation of research funds.  

Code of Federal Regulations, 2011 CFR

... 2011-01-01 false Allocation of research funds. 3430.311 Section 3430.311...ADMINISTRATIVE PROVISIONS Agriculture and Food Research Initiative 3430.311 Allocation of research funds. (a) Fundamental...

2011-01-01

251

14 CFR 93.215 - Initial allocation of slots.  

Code of Federal Regulations, 2013 CFR

...TRAFFIC AND GENERAL OPERATING RULES SPECIAL AIR TRAFFIC RULES Allocation of Commuter and Air Carrier IFR Operations at High Density Traffic Airports 93.215 Initial allocation of slots. (a) Each air carrier and commuter operator...

2013-01-01

252

14 CFR 93.215 - Initial allocation of slots.  

Code of Federal Regulations, 2011 CFR

...TRAFFIC AND GENERAL OPERATING RULES SPECIAL AIR TRAFFIC RULES Allocation of Commuter and Air Carrier IFR Operations at High Density Traffic Airports 93.215 Initial allocation of slots. (a) Each air carrier and commuter operator...

2011-01-01

253

14 CFR 93.215 - Initial allocation of slots.  

Code of Federal Regulations, 2014 CFR

...TRAFFIC AND GENERAL OPERATING RULES SPECIAL AIR TRAFFIC RULES Allocation of Commuter and Air Carrier IFR Operations at High Density Traffic Airports 93.215 Initial allocation of slots. (a) Each air carrier and commuter operator...

2014-01-01

254

14 CFR 93.215 - Initial allocation of slots.  

Code of Federal Regulations, 2012 CFR

...TRAFFIC AND GENERAL OPERATING RULES SPECIAL AIR TRAFFIC RULES Allocation of Commuter and Air Carrier IFR Operations at High Density Traffic Airports 93.215 Initial allocation of slots. (a) Each air carrier and commuter operator...

2012-01-01

255

Optimal Joint Multiple Resource Allocation Method for Cloud Computing Environments  

E-print Network

Cloud computing is a model for enabling convenient, on-demand network access to a shared pool of configurable computing resources. To provide cloud computing services economically, it is important to optimize resource allocation under the assumption that the required resource can be taken from a shared resource pool. In addition, to be able to provide processing ability and storage capacity, it is necessary to allocate bandwidth to access them at the same time. This paper proposes an optimal resource allocation method for cloud computing environments. First, this paper develops a resource allocation model of cloud computing environments, assuming both processing ability and bandwidth are allocated simultaneously to each service request and rented out on an hourly basis. The allocated resources are dedicated to each service request. Next, this paper proposes an optimal joint multiple resource allocation method, based on the above resource allocation model. It is demonstrated by simulation evaluation that the p...

Kuribayashi, Shin-ichi

2011-01-01

256

10 CFR 455.30 - Allocation of funds.  

Code of Federal Regulations, 2010 CFR

...455.30 Section 455.30 Energy DEPARTMENT OF ENERGY ENERGY CONSERVATION GRANT PROGRAMS FOR SCHOOLS AND HOSPITALS AND BUILDINGS OWNED BY UNITS OF LOCAL GOVERNMENT...Allocation of funds. (a) DOE will allocate...

2010-01-01

257

Recipient allocation preferences and organizational choices: a fit perspective  

E-print Network

sample of Turkish registered nurses. Results show that recipients have differential preferences for allocation norms depending on resource type being allocated and characteristics of the environment. Furthermore, the fit or misfit between recipients...

Gogus, Celile Itir

2007-04-25

258

Stochastic dynamics of baroclinic waves  

NASA Technical Reports Server (NTRS)

The maintenance of variance and attendant heat flux in linear, forced dissipative baroclinic shear flows subject to stochastic excitation is examined. The baroclinic problem, is intrinsically nonnormal and its stochastic dynamics is found to differ significantly from the more familiar stochastic dynamics of normal systems. When the shear is sufficiently great in comparison to dissipative effects, stochastic excitation supports highly enhanced variance levels in these nonnormal systems compared to variance levels supproted by the same forcing and dissipation in related normal systems. The eddy variance and associated heat flux are found to arise in response to transient amplification of a subset of forcing functions that obtain energy from the mean flow and project this energy on a distinct subset of response functions (EOFs) that are in turn distinct from the set of normal modes of the system. A method for obtaining the dominant forcing and response functions as well as the distribution of heat flux for a given flow is described.

Farrell, Brian F.; Ionannou, Petros J.

1993-01-01

259

Optimal Advertising with Stochastic Demand  

Microsoft Academic Search

A stochastic, sequential model is developed to determine optimal advertising expenditures as a function of product maturity and past advertising. Random demand for the product depends upon an aggregate measure of current and past advertising called \\

George E. Monahan

1983-01-01

260

Statistical validation of stochastic models  

SciTech Connect

It is common practice in structural dynamics to develop mathematical models for system behavior, and the authors are now capable of developing stochastic models, i.e., models whose parameters are random variables. Such models have random characteristics that are meant to simulate the randomness in characteristics of experimentally observed systems. This paper suggests a formal statistical procedure for the validation of mathematical models of stochastic systems when data taken during operation of the stochastic system are available. The statistical characteristics of the experimental system are obtained using the bootstrap, a technique for the statistical analysis of non-Gaussian data. The authors propose a procedure to determine whether or not a mathematical model is an acceptable model of a stochastic system with regard to user-specified measures of system behavior. A numerical example is presented to demonstrate the application of the technique.

Hunter, N.F. [Los Alamos National Lab., NM (United States). Engineering Science and Analysis Div.; Barney, P.; Paez, T.L. [Sandia National Labs., Albuquerque, NM (United States). Experimental Structural Dynamics Dept.; Ferregut, C.; Perez, L. [Univ. of Texas, El Paso, TX (United States). Dept. of Civil Engineering

1996-12-31

261

Stochastic Climate Theory and Modelling  

E-print Network

Stochastic methods are a crucial area in contemporary climate research and are increasingly being used in comprehensive weather and climate prediction models as well as reduced order climate models. Stochastic methods are used as subgrid-scale parameterizations as well as for model error representation, uncertainty quantification, data assimilation and ensemble prediction. The need to use stochastic approaches in weather and climate models arises because we still cannot resolve all necessary processes and scales in comprehensive numerical weather and climate prediction models. In many practical applications one is mainly interested in the largest and potentially predictable scales and not necessarily in the small and fast scales. For instance, reduced order models can simulate and predict large scale modes. Statistical mechanics and dynamical systems theory suggest that in reduced order models the impact of unresolved degrees of freedom can be represented by suitable combinations of deterministic and stochast...

Franzke, Christian L E; Berner, Judith; Williams, Paul D; Lucarini, Valerio

2014-01-01

262

Using Infrastructure Density for Resource Allocation Policy  

Microsoft Academic Search

This research work has developed methodologies to enhance the ability of decision-makers to distribute resources for security by (a) estimating critical infrastructure densities around hypothetical vulnerable sites as a basis for risk-based resource allocation; and (b) summarizing and evaluating the conceptual and practical soundness of critical infrastructure density estimates applicable to a wide variety of infrastructures. The methodology to estimate

Rae Zimmerman; Carlos E. Restrepo; Jeffrey S. Simonoff; Zvia Naphtali

2009-01-01

263

University of Massachusetts Amherst Space Allocation Procedures  

E-print Network

University of Massachusetts Amherst Space Allocation Procedures The University of Massachusetts Amherst campus space is considered a total resource under the control and management of the central administration. No individual spaces or areas are regarded as the "real property" of any department

Mountziaris, T. J.

264

Computational Models and Resource Allocation for Supercomputers  

E-print Network

Computational Models and Resource Allocation for Supercomputers JON MAUNEY, DHARMA P. AGRAWAL, FELLOW, IEEE, YOUNG K. CHOE, EDWIN A. HARCOURT, SUKIL KIM, AND WAYNE J. STAATS I Supercomputers- tage of that power. There are several different architectures used in supercomputers, with differing

Harcourt, Ed

265

Allocating scarce resources for endangered species recovery  

Microsoft Academic Search

This article examines the relationship between fiscal year 1990 Fish and Wildlife Service spending on endangered species recovery and the priority ranking assigned by the Fish and Wildlife Service to particular species. The focus of the analysis is on the extent to which resources were allocated to species assigned higher priority rankings. The major conclusions are: species' recovery priority rank

Benjamin M. Simon; Craig S. Leff; Harvey Doerksen

1995-01-01

266

Contingency allocation and management for building projects  

Microsoft Academic Search

A theoretical approach is presented for contingency allocation and management in building projects using the quantification of uncertainty of project cost. The uncertainty of input items to a bill of quantities, namely, quantities of bill items, usage of resources and their prices are quantified as two moments. From these, two moments for project cost are evaluated. The cumulative distribution function

Malik Ranasinghe

1994-01-01

267

Synthesis of waste interception and allocation networks  

Microsoft Academic Search

This article introduces the novel concept of synthesizing waste-interception networks (WINs) and incorporates it within a mass-integration framework for the global allocation of pollutants. The essence of this notion is to provide selective interception and rerouting of undesirable species at the heart of the process instead of dealing with the pollutants in the terminal waste streams. It also provides a

M. M. El-Halwagi; A. A. Hamad; G. W. Garrison

1996-01-01

268

RAOPS: Resource Allocation Optimization Program for Safegurards  

SciTech Connect

RAOPS--Resource Allocation Optimization Program for Safeguards is extended to a multiobjective return function having the detection probability and expected detection time as criteria. The expected detection time is included as a constraint, based on the well-known Avenhaus model of the optimum number of inventory periods. Examples of computation are provided.

Zardecki, A.; Markin, J.T.

1994-03-01

269

Dynamic Bandwidth Allocation Algorithms for Differentiated Services  

E-print Network

Dynamic Bandwidth Allocation Algorithms for Differentiated Services enabled Ethernet Passive support the in- creasing demands for high speed connections. One of the new technologies that has emerged in recent years is Ethernet Passive Optical Networks. The key fea- tures of this approach are the simplicity

Murphy, John

270

Channel Allocation Problem Medium Access Protocols  

E-print Network

Channel Allocation Problem Medium Access Protocols Ethernet Collission-Free Protocols Wireless Protocols Ethernet Collission-Free Protocols Wireless Ethernet (WLAN) IEEE 802.2 Other Layer 2 Components.3 4 Collission-Free Protocols 5 Wireless Ethernet (WLAN) IEEE 802.11 6 IEEE 802.2 7 Other Layer 2

Ramkumar, Mahalingam

271

EnterAllocation Changes: Savings Account $  

E-print Network

Education Other $ METRO'S ROUTING AND TRANSIT NO. 211381990 For all allocation changes, please forward to Metro Credit Union at: 877-MY-METRO (Fax) 617-889-7776 Mail to: Deposit Operations Metro Credit Union NO. NAME (PRINT) Eagle I.D. Number: SIGNATURE I/We hereby make application for membership in Metro

Huang, Jianyu

272

Resource Allocation Patterns and Student Achievement  

ERIC Educational Resources Information Center

This quantitative research study was designed to examine the relationship between system resource allocation patterns and student achievement, as measured by eighth grade Criterion-Referenced Competency Test (CRCT) mathematics, eighth grade CRCT reading, eleventh grade Georgia High School Graduation Test (GHSGT) mathematics, eleventh grade and

James, Lori; Pate, James; Leech, Donald; Martin, Ellice; Brockmeier, Lantry; Dees, Elizabeth

2011-01-01

273

Efficiency and exclusion in collective action allocations  

Microsoft Academic Search

Suppose that a group of people meet to determine the cost allocation of a collective action, and that each individual's valuation of the collective action is private and independent of all others' values. With this information structure there is an incentive problemeach individual has an incentive to understate value in order to lower his or her cost share of the

James A. Dearden

1997-01-01

274

Energy Uptake and Allocation During Ontogeny  

E-print Network

Energy Uptake and Allocation During Ontogeny Chen Hou,1 * Wenyun Zuo,2 Melanie E. Moses,3 William H is transformed into biomass and metabolic energy during ontogeny. When an animal is growing, some fraction is the energy re- quired to synthesize a unit of biomass. It is difficult to measure Bbasal over ontogeny

Brown, James H.

275

Multiattribute Decision Making by Sequential Resource Allocation  

E-print Network

Multiattribute Decision Making by Sequential Resource Allocation PETER A. MORRIS Applied Decision that the preference information revealed by the decision-maker's choices is exactly the information necessary to make with a single criterion. Individuals, corporations and govern- ments make daily decisions that involve different

Oren, Shmuel S.

276

Limits on linearity of missile allocation optimization  

SciTech Connect

Optimizations of missile allocation based on linearized exchange equations produce accurate allocations, but the limits of validity of the linearization are not known. These limits are explored in the context of the upload of weapons by one side to initially small, equal forces of vulnerable and survivable weapons. The analysis compares analytic and numerical optimizations and stability induces based on aggregated interactions of the two missile forces, the first and second strikes they could deliver, and they resulting costs. This note discusses the costs and stability indices induced by unilateral uploading of weapons to an initially symmetrical low force configuration. These limits are quantified for forces with a few hundred missiles by comparing analytic and numerical optimizations of first strike costs. For forces of 100 vulnerable and 100 survivable missiles on each side, the analytic optimization agrees closely with the numerical solution. For 200 vulnerable and 200 survivable missiles on each side, the analytic optimization agrees with the induces to within about 10%, but disagrees with the allocation of the side with more weapons by about 50%. The disagreement comes from the interaction of the possession of more weapons with the shift of allocation from missiles to value that they induce.

Canavan, G.H.

1997-12-01

277

Optimizing Organ Allocation and Acceptance OGUZHAN ALAGOZ  

E-print Network

they are harvested, but the rate is organ-specific. The time lag between when an organ is harvested and whenOptimizing Organ Allocation and Acceptance OGUZHAN ALAGOZ Department of Operations Weatherhead, organ transplantation has been an important therapy for many diseases. Organs that can safely

Schaefer, Andrew

278

The Allocation of Resources in a University  

ERIC Educational Resources Information Center

The paper describes a linear programming model which generates explicit quantitative information about (1) the optimal allocation of resources inside the public university (2) the "shadow price" attached to each input used in the academic process; and (3) the optimal mixture of academic outputs produced by the university. (KM)

Koch, James V.

1974-01-01

279

Bandwidth allocation and routing in ISDN's  

Microsoft Academic Search

The goal of communications network design is to satisfy user requirements with the minimum amount of investment. This paper presents a method for the optimal design of ISDN's. First, three multiplexing systems that allow the integration of circuit- and packetswitching traffic are described. Then, a key design problem - bandwidth allocation and routing for integrated networks - is formulated, and

M. Gerla; R. Pazos-Rangel

1984-01-01

280

PRISM-games: A Model Checker for Stochastic Multi-Player Games  

E-print Network

PRISM-games: A Model Checker for Stochastic Multi-Player Games Taolue Chen1 , Vojtech Forejt1 of Oxford, UK 2 School of Computer Science, University of Birmingham, UK Abstract. We present PRISM checker PRISM, benefiting from its existing user interface and simulator, whilst adding novel model

Oxford, University of

281

3972 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 7, NO. 10, OCTOBER 2008 Stochastic Delay Guarantees and  

E-print Network

resources with stochastic delay guarantees. Index Terms--IEEE 802.11 MAC, ad hoc network, queuing model]. This implies that a G/G/1 queuing analysis is required in order to provide statistical CAC for different are complicated. Moreover, only first order statistics such as average waiting time can be used in CAC

Zhuang, Weihua

282

Ubiquitous Crossmodal Stochastic Resonance in Humans: Auditory Noise Facilitates Tactile, Visual and Proprioceptive Sensations  

Microsoft Academic Search

BackgroundStochastic resonance is a nonlinear phenomenon whereby the addition of noise can improve the detection of weak stimuli. An optimal amount of added noise results in the maximum enhancement, whereas further increases in noise intensity only degrade detection or information content. The phenomenon does not occur in linear systems, where the addition of noise to either the system or the

Eduardo Lugo; Rafael Doti; Jocelyn Faubert; Leslie B. Vosshall

2008-01-01

283

The allocation of ecosystem net primary productivity in tropical forests  

PubMed Central

The allocation of the net primary productivity (NPP) of an ecosystem between canopy, woody tissue and fine roots is an important descriptor of the functioning of that ecosystem, and an important feature to correctly represent in terrestrial ecosystem models. Here, we collate and analyse a global dataset of NPP allocation in tropical forests, and compare this with the representation of NPP allocation in 13 terrestrial ecosystem models. On average, the data suggest an equal partitioning of allocation between all three main components (mean 34 6% canopy, 39 10% wood, 27 11% fine roots), but there is substantial site-to-site variation in allocation to woody tissue versus allocation to fine roots. Allocation to canopy (leaves, flowers and fruit) shows much less variance. The mean allocation of the ecosystem models is close to the mean of the data, but the spread is much greater, with several models reporting allocation partitioning outside of the spread of the data. Where all main components of NPP cannot be measured, litterfall is a good predictor of overall NPP (r2 = 0.83 for linear fit forced through origin), stem growth is a moderate predictor and fine root production a poor predictor. Across sites the major component of variation of allocation is a shifting allocation between wood and fine roots, with allocation to the canopy being a relatively invariant component of total NPP. This suggests the dominant allocation trade-off is a fine root versus wood trade-off, as opposed to the expected rootshoot trade-off; such a trade-off has recently been posited on theoretical grounds for old-growth forest stands. We conclude by discussing the systematic biases in estimates of allocation introduced by missing NPP components, including herbivory, large leaf litter and root exudates production. These biases have a moderate effect on overall carbon allocation estimates, but are smaller than the observed range in allocation values across sites. PMID:22006964

Malhi, Yadvinder; Doughty, Christopher; Galbraith, David

2011-01-01

284

Schwinger Mechanism with Stochastic Quantization  

E-print Network

We prescribe a formulation of the particle production with real-time Stochastic Quantization. To construct the retarded and the time-ordered propagators we decompose the stochastic variables into positive- and negative-energy parts. In this way we demonstrate how to derive a standard formula for the Schwinger mechanism under time-dependent electric fields. We discuss a mapping to the Schwinger-Keldysh formalism and a relation to the classical statistical simulation.

Kenji Fukushima; Tomoya Hayata

2014-03-17

285

Optimal Stochastic Enhancement of Photoionization  

SciTech Connect

The effect of noise on the nonlinear photoionization of an atom due to a femtosecond pulse is investigated in the framework of the stochastic Schroedinger equation. A modest amount of white noise results in an enhancement of the net ionization yield by several orders of magnitude, giving rise to a form of quantum stochastic resonance. We demonstrate that this effect is preserved if the white noise is replaced by broadband chaotic light.

Singh, Kamal P.; Rost, Jan M. [Max Planck Institute for the Physics of Complex Systems, Noethnitzer Strasse 38, D-01187 Dresden (Germany)

2007-04-20

286

Stochastic roots of growth phenomena  

NASA Astrophysics Data System (ADS)

We show that the Gompertz equation describes the evolution in time of the median of a geometric stochastic process. Therefore, we induce that the process itself generates the growth. This result allows us further to exploit a stochastic variational principle to take account of self-regulation of growth through feedback of relative density variations. The conceptually well defined framework so introduced shows its usefulness by suggesting a form of control of growth by exploiting external actions.

De Lauro, E.; De Martino, S.; De Siena, S.; Giorno, V.

2014-05-01

287

Schwinger mechanism with stochastic quantization  

NASA Astrophysics Data System (ADS)

We prescribe a formulation of the particle production with real-time Stochastic Quantization. To construct the retarded and the time-ordered propagators we decompose the stochastic variables into positive- and negative-energy parts. In this way we demonstrate how to derive a standard formula for the Schwinger mechanism under time-dependent electric fields. We discuss a mapping to the Schwinger-Keldysh formalism and a relation to the classical statistical simulation.

Fukushima, Kenji; Hayata, Tomoya

2014-07-01

288

75 FR 18016 - Notice of Allocation Availability (NOAA) Inviting Applications for the CY 2010 Allocation Round...  

Federal Register 2010, 2011, 2012, 2013, 2014

...qualifications of the applicant's principals, its board members, its management...governmental programs, including other tax programs; and the applicant's...requirements, particularly tax credit program compliance...with its requested amount of tax credit allocations; the...

2010-04-08

289

Hadronization at the AdS wall  

SciTech Connect

We describe hadronization events, using the AdS/CFT Correspondence, which display many of the qualitative features expected in QCD. In particular we study the motion of strings with separating end points in a back-reacted hard wall geometry. The solutions show the development of a linear QCD-like string. The end points oscillate in the absence of string breaking. We introduce string breaking by hand and evolve the new state forward in time to observe the separation of two string segments. A kink associated with this breaking evolves to the end points of the string inducing rho meson production. We explicitly compute the rho meson production at the end point.

Evans, Nick; French, James; Threlfall, Ed [School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ (United Kingdom); Jensen, Kristan [Department of Physics, University of Washington, Seattle, Washington 98195 (United States)

2010-03-15

290

Nonlinear Realization of Supersymmetric AdS Space Isometries  

E-print Network

The isometries of $AdS_5$ space and supersymmetric $AdS_5\\otimes S_1$ space are nonlinearly realized on four dimensional Minkowski space. The resultant effective actions in terms of the Nambu-Goldstone modes are constructed. The dilatonic mode governing the motion of the Minkowski space probe brane into the covolume of supersymmetric $AdS_5$ space is found to be unstable and the bulk of the $AdS_5$ space is unable to sustain the brane. No such instablility appears in the non-supersymmetric case.

T. E. Clark; S. T. Love

2005-10-31

291

25 CFR 170.200 - How does BIA allocate IRR Program funds?  

Code of Federal Regulations, 2014 CFR

...Reservation Roads Program Funding Tribal Transportation Allocation Methodology (ttam) 170.200 How does BIA allocate IRR Program...This section sets forth the Tribal Transportation Allocation Methodology (TTAM) that BIA uses to allocate IRR Program...

2014-04-01

292

25 CFR 170.200 - How does BIA allocate IRR Program funds?  

Code of Federal Regulations, 2010 CFR

...Reservation Roads Program Funding Tribal Transportation Allocation Methodology (ttam) 170.200 How does BIA allocate IRR Program...This section sets forth the Tribal Transportation Allocation Methodology (TTAM) that BIA uses to allocate IRR Program...

2010-04-01

293

25 CFR 170.200 - How does BIA allocate IRR Program funds?  

Code of Federal Regulations, 2013 CFR

...Reservation Roads Program Funding Tribal Transportation Allocation Methodology (ttam) 170.200 How does BIA allocate IRR Program...This section sets forth the Tribal Transportation Allocation Methodology (TTAM) that BIA uses to allocate IRR Program...

2013-04-01

294

25 CFR 170.200 - How does BIA allocate IRR Program funds?  

Code of Federal Regulations, 2011 CFR

...Reservation Roads Program Funding Tribal Transportation Allocation Methodology (ttam) 170.200 How does BIA allocate IRR Program...This section sets forth the Tribal Transportation Allocation Methodology (TTAM) that BIA uses to allocate IRR Program...

2011-04-01

295

25 CFR 170.200 - How does BIA allocate IRR Program funds?  

Code of Federal Regulations, 2012 CFR

...Reservation Roads Program Funding Tribal Transportation Allocation Methodology (ttam) 170.200 How does BIA allocate IRR Program...This section sets forth the Tribal Transportation Allocation Methodology (TTAM) that BIA uses to allocate IRR Program...

2012-04-01

296

20 CFR 618.910 - Distribution of initial allocation of training funds.  

Code of Federal Regulations, 2011 CFR

...Distribution of initial allocation of training funds. 618.910 Section 618.910 Employees...AS AMENDED Allocation of Training Funds to States 618.910 Distribution of initial allocation of training funds. (a) Initial allocation....

2011-04-01

297

Real-time management of berth allocation with stochastic arrival and handling times  

E-print Network

an optimization based recovery algorithm based on set partitioning method and a smart greedy algorithm to reassign information; it is common to refer to these optimization problems as recovery problems. Recovery optimization

Bierlaire, Michel

298

PETROLEUM ALLOCATION AT PETROBRAS: MATHEMATICAL MODEL AND A SOLUTION  

E-print Network

PETROLEUM ALLOCATION AT PETROBRAS: MATHEMATICAL MODEL AND A SOLUTION ALGORITHM Roger Rocha1 Petroleum Allocation is an important link for the integration of Petroleum Supply Chain at PETROBRAS. In this work we describe how mathematical programming is being used to solve the Petroleum Allocation Problem

Grossmann, Ignacio E.

299

12 CFR 615.5208 - Allotment of allocated investments.  

Code of Federal Regulations, 2010 CFR

...determined, and an amount of the allocated...association must be allotted to the Farm Credit... (i) If the total of the allocated...numerator is the amount of capital needed...denominator is the total amount of allocated...amount must be allotted to the...

2010-01-01

300

Balance of revenue and social welfare in FCC's spectrum allocation  

E-print Network

Balance of revenue and social welfare in FCC's spectrum allocation Yanjiao Chen, Lingjie Duan services, the Federal Communications Com- mission (FCC) in the U.S. is considering allocating additional allocation, prior studies only focused on revenue maximization. However, one of FCC's missions is to better

Huang, Jianwei

301

Automated Meter Reading System for Heat Costs Allocation  

Microsoft Academic Search

The paper presents the design and the implementation of an automated meter reading system for heat costs allocation. The system was developed on three levels: the data acquisition level - where data are recorded from field with costs allocators installed on the radiators; a data concentration level - were data registered by allocators are read at a predetermined time interval

I OAN LIE; VIRGIL TIPONU; IVAN BOGDANOV; SABIN IONEL; Ioan Lie; Virgil Tiponut; Catalin Daniel Caleanu

2009-01-01

302

TASK ALLOCATION METHODOLOGIES FOR MULTI-ROBOT SYSTEMS  

Microsoft Academic Search

One of most important aspects in the design of multi -robot systems is the allocation of tasks among the robots in a productive and efficient manner. Task allocation methodologies must ensure that not only the global mission is achieved, but also the tasks are well distributed among the robots. An effective task allocation approach considers the available resources, the entities

Khashayar R. Baghaei; Arvin Agah

2003-01-01

303

Dynamic bandwidth allocation with fuzzy logic for average delay guarantee  

Microsoft Academic Search

This paper proposes an adaptive bandwidth control algorithm that efficiently provides average delay guarantee. The proposed algorithm resolves problem of inefficient bandwidth allocation due to incomplete, inaccurate traffic descriptors supplied by users. Because the control attempts to allocate the bandwidth only just enough to meet the QoS requirement, the amount of bandwidth saving compared to static allocation can be substantial.

Ali Reza; Shams Shafigh; Zahra Abbasi; Forough Noroozi

304

Goal Oriented Resource Allocation for University Management. An Administration Paper.  

ERIC Educational Resources Information Center

Reported on is an allocation mechanism that combines the decentralized efficiency and incentive features of a market system with the responsiveness of the centralized allocation structure to the overall goals of the university. In this system, decentralized "management centers" are automatically allocated only those income and expense items they

Rogers, Frederick A.; Van Horn, Richard L.

305

Report of the Task Force on Allocations Practices.  

ERIC Educational Resources Information Center

This task force report examines the University of Wyoming's current allocation practices, the allocations themselves, and the expenditure process according to how effectively they support the university library's collection development goals. Individual aspects of the current allocation process are reviewed, including the university budget

Shelton, Diana; And Others

306

Stateless Proportional Bandwidth Allocation Prasanna K. Jagannathan*a  

E-print Network

Stateless Proportional Bandwidth Allocation Prasanna K. Jagannathan*a , Arjan Durresi*a , Raj Jain This paper proposes a new method of bandwidth allocation during congestion, called the proportional information rates, based on their origin. In proportional allocation of bandwidth, during congestion all flows

Durresi, Arjan

307

A weapon-target assignment approach to media allocation  

Microsoft Academic Search

An important problem which media planners face with is media allocation including budget allocation for an advertising campaign in an optimal frame. This study developed a near optimization model, originated from the weapontarget assignment problem of military operations research, that allocates both media and budget. The proposed model, which is independent of the duration of an advertising campaign, also schedules

Eyp etin; Seda Tolun Esen

2006-01-01

308

Reward Allocation and Academic versus Social Orientation toward School.  

ERIC Educational Resources Information Center

Correlates 138 elementary school children's views about the purposes of school to their styles of reward allocation: academically motivated students allocated rewards equally to two hypothetical performers who had unequally helped a teacher perform a manual chore, while socially motivated children allocated rewards in an equity (performance-based)

Peterson, Candida C.; Peterson, James L.

1978-01-01

309

A Stochastic Collocation Algorithm for Uncertainty Analysis  

NASA Technical Reports Server (NTRS)

This report describes a stochastic collocation method to adequately handle a physically intrinsic uncertainty in the variables of a numerical simulation. For instance, while the standard Galerkin approach to Polynomial Chaos requires multi-dimensional summations over the stochastic basis functions, the stochastic collocation method enables to collapse those summations to a one-dimensional summation only. This report furnishes the essential algorithmic details of the new stochastic collocation method and provides as a numerical example the solution of the Riemann problem with the stochastic collocation method used for the discretization of the stochastic parameters.

Mathelin, Lionel; Hussaini, M. Yousuff; Zang, Thomas A. (Technical Monitor)

2003-01-01

310

Stochasticity, succession, and environmental perturbations in a fluidic ecosystem  

PubMed Central

Unraveling the drivers of community structure and succession in response to environmental change is a central goal in ecology. Although the mechanisms shaping community structure have been intensively examined, those controlling ecological succession remain elusive. To understand the relative importance of stochastic and deterministic processes in mediating microbial community succession, a unique framework composed of four different cases was developed for fluidic and nonfluidic ecosystems. The framework was then tested for one fluidic ecosystem: a groundwater system perturbed by adding emulsified vegetable oil (EVO) for uranium immobilization. Our results revealed that groundwater microbial community diverged substantially away from the initial community after EVO amendment and eventually converged to a new community state, which was closely clustered with its initial state. However, their composition and structure were significantly different from each other. Null model analysis indicated that both deterministic and stochastic processes played important roles in controlling the assembly and succession of the groundwater microbial community, but their relative importance was time dependent. Additionally, consistent with the proposed conceptual framework but contradictory to conventional wisdom, the community succession responding to EVO amendment was primarily controlled by stochastic rather than deterministic processes. During the middle phase of the succession, the roles of stochastic processes in controlling community composition increased substantially, ranging from 81.3% to 92.0%. Finally, there are limited successional studies available to support different cases in the conceptual framework, but further well-replicated explicit time-series experiments are needed to understand the relative importance of deterministic and stochastic processes in controlling community succession. PMID:24550501

Zhou, Jizhong; Deng, Ye; Zhang, Ping; Xue, Kai; Liang, Yuting; Van Nostrand, Joy D.; Yang, Yunfeng; He, Zhili; Wu, Liyou; Stahl, David A.; Hazen, Terry C.; Tiedje, James M.; Arkin, Adam P.

2014-01-01

311

The group approach to AdS space propagators  

E-print Network

We show that AdS two-point functions can be obtained by connecting two points in the interior of AdS space with one point on its boundary by a dual pair of Dobrev's boundary-to-bulk intertwiners and integrating over the boundary point.

Thorsten Leonhardt; Ruben Manvelyan; Werner Ruehl

2003-05-27

312

The group approach to AdS space propagators  

Microsoft Academic Search

We show that AdS two-point functions can be obtained by connecting two points in the interior of AdS space with one point on its boundary by a dual pair of Dobrev's boundary-to-bulk intertwiners and integrating over the boundary point.

Thorsten Leonhardt; Ruben Manvelyan; Werner Rhl

2003-01-01

313

Conformal symmetry of supergravities in AdS spaces  

Microsoft Academic Search

We show that the background field method applied to supergravity in AdS space-time provides the path integral for the theory in the bulk with conformal symmetry associated with the isometry of the AdS space. This in turn allows us to establish the rigid conformal invariance of the generating functional for the supergravity correlators on the boundary.

Renata Kallosh; Antoine van Proeyen

1999-01-01

314

Conformal Symmetry of Supergravities in AdS spaces  

E-print Network

We show that the background field method applied to supergravity in adS space-time provides the path integral for the theory in the bulk with conformal symmetry associated with the isometry of the adS space. This in turn allows to establish the rigid conformal invariance of the generating functional for the supergravity correlators on the boundary.

Renata Kallosh; Antoine Van Proeyen

1998-04-14

315

Assessing the performance of life-cycle portfolio allocation strategies for retirement saving: a simulation study.  

PubMed

This article examines the performance of four life-cycle portfolio allocation strategies through stochastic simulation based on observed U.S. asset returns during 1926-2008. Annual worker contributions to retirement savings accounts are based on the actual lifetime earnings histories maintained by the Social Security Administration for 12,871 workers born during 1915-1942. Each strategy's performance is evaluated primarily on the basis of the distributions of internal rates of return on investments calculated at the time of retirement. Comparisons are made with the performance of four other investment strategies that vary in terms of their exposure to stock and bond market risk. Life-cycle plans with larger portfolio weights assigned to equities have higher average returns, but those gains come at the cost of increased risk of infrequent bad outcomes. PMID:20337136

Bridges, Benjamin; Gesumaria, Robert; Leonesio, Michael V

2010-01-01

316

A Framework for Incorporating General Domain Knowledge into Latent Dirichlet Allocation using First-Order Logic  

SciTech Connect

Topic models have been used successfully for a variety of problems, often in the form of application-specific extensions of the basic Latent Dirichlet Allocation (LDA) model. Because deriving these new models in order to encode domain knowledge can be difficult and time-consuming, we propose the Fold-all model, which allows the user to specify general domain knowledge in First-Order Logic (FOL). However, combining topic modeling with FOL can result in inference problems beyond the capabilities of existing techniques. We have therefore developed a scalable inference technique using stochastic gradient descent which may also be useful to the Markov Logic Network (MLN) research community. Experiments demonstrate the expressive power of Fold-all, as well as the scalability of our proposed inference method.

Andrzejewski, D; Zhu, X; Craven, M; Recht, B

2011-01-18

317

Stochastic Inflation: New Results  

E-print Network

This is an old article which has never been posted for public use and which only appeard in a relatively hard-to-get Proceedings of the Sakharov Conference in Moscow (May, 1991). The subject of this article has received a lot of attention in last two years. Although we acknowledge that there has been a very big progress in the field of relating the spectrum of fluctuations to scalar field potentials of inflation models, which have outdated some of our results (particularly because we never took into account the tensor fluctuations which have been shown to be crucial for reconstructing the inflaton potential) we think that some of the other ideas and approaches which we presented in this article maybe still of interest. We did not rewrite the article to include any of the newer approaches and we did not add any of the newer references. The reader is advised to refer to recent papers (for example, see the paper astro-ph/9403001 by Edward Kolb and Sharon Vadas) for state of the art review and up-to-date references. ==The original abstract of the article==: We prove that, in stochastic approach, there exists an equivalence relation between different inflationary models under some redefinition of field and time variables. The postinflationary physics is insensitive to it and one can say that related theories are in fact indistinguishable from the viewpoint

A. Mezhlumian; A. Starobinsky

1994-06-14

318

Stochastic cooling in RHIC  

SciTech Connect

The full 6-dimensional [x,x'; y,y'; z,z'] stochastic cooling system for RHIC was completed and operational for the FY12 Uranium-Uranium collider run. Cooling enhances the integrated luminosity of the Uranium collisions by a factor of 5, primarily by reducing the transverse emittances but also by cooling in the longitudinal plane to preserve the bunch length. The components have been deployed incrementally over the past several runs, beginning with longitudinal cooling, then cooling in the vertical planes but multiplexed between the Yellow and Blue rings, next cooling both rings simultaneously in vertical (the horizontal plane was cooled by betatron coupling), and now simultaneous horizontal cooling has been commissioned. The system operated between 5 and 9 GHz and with 3 x 10{sup 8} Uranium ions per bunch and produces a cooling half-time of approximately 20 minutes. The ultimate emittance is determined by the balance between cooling and emittance growth from Intra-Beam Scattering. Specific details of the apparatus and mathematical techniques for calculating its performance have been published elsewhere. Here we report on: the method of operation, results with beam, and comparison of results to simulations.

Brennan J. M.; Blaskiewicz, M.; Mernick, K.

2012-05-20

319

Stochastic processes in gravitropism.  

PubMed

In this short review we focus on the role of noise in gravitropism of plants - the reorientation of plants according to the direction of gravity. We briefly introduce the conventional picture of static gravisensing in cells specialized in sensing. This model hinges on the sedimentation of statoliths (high in density and mass relative to other organelles) to the lowest part of the sensing cell. We then present experimental observations that cannot currently be understood within this framework. Lastly we introduce some current alternative models and directions that attempt to incorporate and interpret these experimental observations, including: (i) dynamic sensing, where gravisensing is suggested to be enhanced by stochastic events due to thermal and mechanical noise. These events both effectively lower the threshold of response, and lead to small-distance sedimentation, allowing amplification, and integration of the signal. (ii) The role of the cytoskeleton in signal-to-noise modulation and (iii) in signal transduction. In closing, we discuss directions that seem to either not have been explored, or that are still poorly understood. PMID:25505482

Meroz, Yasmine; Bastien, Renaud

2014-01-01

320

Stochastic processes in gravitropism  

PubMed Central

In this short review we focus on the role of noise in gravitropism of plants the reorientation of plants according to the direction of gravity. We briefly introduce the conventional picture of static gravisensing in cells specialized in sensing. This model hinges on the sedimentation of statoliths (high in density and mass relative to other organelles) to the lowest part of the sensing cell. We then present experimental observations that cannot currently be understood within this framework. Lastly we introduce some current alternative models and directions that attempt to incorporate and interpret these experimental observations, including: (i) dynamic sensing, where gravisensing is suggested to be enhanced by stochastic events due to thermal and mechanical noise. These events both effectively lower the threshold of response, and lead to small-distance sedimentation, allowing amplification, and integration of the signal. (ii) The role of the cytoskeleton in signal-to-noise modulation and (iii) in signal transduction. In closing, we discuss directions that seem to either not have been explored, or that are still poorly understood. PMID:25505482

Meroz, Yasmine; Bastien, Renaud

2014-01-01

321

ad hoc networks.\\  

Microsoft Academic Search

Purpose Mobile ad hoc networks rely on cooperation to perform essential network mechanisms such as routing. Therefore, network performance depends to a great extent on giving participating nodes an incentive for cooperation. The level of trust among nodes is the most frequently used parameter for promoting cooperation in distributed systems. There are different models for representing trust, each of

Marcela Mejia; Nstor M. Pea; Jose L. Muoz; Oscar Esparza

2009-01-01

322

Economic Value Added  

Microsoft Academic Search

Economic Value Added (EVA), when applied properly in a company, impacts all departments and decisions. The equation for EVA as well as the adjustments that must be made to current accounting practices is the basis for an understanding of EVA. The success of EVA is displayed as companies that have implemented EVA to varying degrees are compared with companies that

Michael D Houle

2008-01-01

323

Two Virasoro symmetries in stringy warped AdS3  

NASA Astrophysics Data System (ADS)

We study three-dimensional consistent truncations of type IIB supergravity which admit warped AdS3 solutions. These theories contain subsectors that have no bulk dynamics. We show that the symplectic form for these theories, when restricted to the non-dynamical subsectors, equals the symplectic form for pure Einstein gravity in AdS3. Consequently, for each consistent choice of boundary conditions in AdS3, we can define a consistent phase space in warped AdS3 with identical conserved charges. This way, we easily obtain a Virasoro Virasoro asymptotic symmetry algebra in warped AdS3; two different types of Virasoro Ka?-Moody symmetries are also consistent alternatives.

Compre, Geoffrey; Guica, Monica; Rodriguez, Maria J.

2014-12-01

324

Pathologies in Lovelock AdS Black Branes and AdS/CFT  

E-print Network

We study the pathologies in AdS black branes in Lovelock theory. More precisely, we examine the conditions that AdS black branes have the naked singularity, the ghost instability and the dynamical instability. From the point of view of the AdS/CFT correspondence, the pathologies in AdS black branes indicate the pathologies in the corresponding CFT. Hence, we need to be careful when we apply AdS/CFT in Lovelock theory to various phenomena such as the shear viscosity to entropy ratio in strongly coupled quantum filed theory.

Tomohiro Takahashi; Jiro Soda

2011-08-25

325

Introducing ADS Labs  

NASA Astrophysics Data System (ADS)

ADS Labs is a platform that ADS is introducing in order to test and receive feedback from the community on new technologies and prototype services. Currently, ADS Labs features a new interface for abstract searches, faceted filtering of results, visualization of co-authorship networks, article-level recommendations, and a full-text search service. The streamlined abstract search interface provides a simple, one-box search with options for ranking results based on a paper relevancy, freshness, number of citations, and downloads. In addition, it provides advanced rankings based on collaborative filtering techniques. The faceted filtering interface allows users to narrow search results based on a particular property or set of properties ("facets"), allowing users to manage large lists and explore the relationship between them. For any set or sub-set of records, the co-authorship network can be visualized in an interactive way, offering a view of the distribution of contributors and their inter-relationships. This provides an immediate way to detect groups and collaborations involved in a particular research field. For a majority of papers in Astronomy, our new interface will provide a list of related articles of potential interest. The recommendations are based on a number of factors, including text similarity, citations, and co-readership information. The new full-text search interface allows users to find all instances of particular words or phrases in the body of the articles in our full-text archive. This includes all of the scanned literature in ADS as well as a select portion of the current astronomical literature, including ApJ, ApJS, AJ, MNRAS, PASP, A&A, and soon additional content from Springer journals. Fulltext search results include a list of the matching papers as well as a list of "snippets" of text highlighting the context in which the search terms were found. ADS Labs is available at http://adslabs.org

Accomazzi, Alberto; Henneken, E.; Grant, C. S.; Kurtz, M. J.; Di Milia, G.; Luker, J.; Thompson, D. M.; Bohlen, E.; Murray, S. S.

2011-05-01

326

Dynamic advance reservation with delayed allocation  

DOEpatents

A method of scheduling data transmissions from a source to a destination, includes the steps of: providing a communication system having a number of channels and a number of paths, each of the channels having a plurality of designated time slots; receiving two or more data transmission requests; provisioning the transmission of the data; receiving data corresponding to at least one of the two or more data transmission requests; waiting until an earliest requested start time T.sub.s; allocating at the current time each of the two or more data transmission requests; transmitting the data; and repeating the steps of waiting, allocating, and transmitting until each of the two or more data transmission requests that have been provisioned for a transmission of data is satisfied. A system to perform the method of scheduling data transmissions is also described.

Vokkarane, Vinod; Somani, Arun

2014-12-02

327

Stochastic simulation in systems biology  

PubMed Central

Natural systems are, almost by definition, heterogeneous: this can be either a boon or an obstacle to be overcome, depending on the situation. Traditionally, when constructing mathematical models of these systems, heterogeneity has typically been ignored, despite its critical role. However, in recent years, stochastic computational methods have become commonplace in science. They are able to appropriately account for heterogeneity; indeed, they are based around the premise that systems inherently contain at least one source of heterogeneity (namely, intrinsic heterogeneity). In this mini-review, we give a brief introduction to theoretical modelling and simulation in systems biology and discuss the three different sources of heterogeneity in natural systems. Our main topic is an overview of stochastic simulation methods in systems biology. There are many different types of stochastic methods. We focus on one group that has become especially popular in systems biology, biochemistry, chemistry and physics. These discrete-state stochastic methods do not follow individuals over time; rather they track only total populations. They also assume that the volume of interest is spatially homogeneous. We give an overview of these methods, with a discussion of the advantages and disadvantages of each, and suggest when each is more appropriate to use. We also include references to software implementations of them, so that beginners can quickly start using stochastic methods for practical problems of interest. PMID:25505503

Szkely, Tams; Burrage, Kevin

2014-01-01

328

MITRAM. Minority Transportation Expenditure Allocation Model  

SciTech Connect

MITRAM (Minority TRansportation expenditure Allocation Model) can project various transportation related attributes of minority (Black and Hispanic) and majority (white) populations. The model projects vehicle ownership, vehicle miles of travel, workers, new car and on-road fleet fuel economy, amount and share of household income spent on gasoline, and household expenditures on public transportation and taxis. MITRAM predicts reactions to sustained fuel price changes for up to 10 years after the change.

Vyas, A.D.; Santini, D.J. [Argonne National Lab., IL (United States)

1989-02-01

329

Multiagent task allocation in social networks  

Microsoft Academic Search

This paper proposes a new variant of the task allocation problem, where the agents are connected in a social network and tasks\\u000a arrive at the agents distributed over the network. We show that the complexity of this problem remains NP-complete. Moreover, it is not approximable within some factor. In contrast to this, we develop an efficient greedy algorithm\\u000a for this

Mathijs M. de Weerdt; Yingqian Zhang; Tomas Klos

2011-01-01

330

Rethinking Reinforcement: Allocation, Induction, and Contingency  

PubMed Central

The concept of reinforcement is at least incomplete and almost certainly incorrect. An alternative way of organizing our understanding of behavior may be built around three concepts: allocation, induction, and correlation. Allocation is the measure of behavior and captures the centrality of choice: All behavior entails choice and consists of choice. Allocation changes as a result of induction and correlation. The term induction covers phenomena such as adjunctive, interim, and terminal behaviorbehavior induced in a situation by occurrence of food or another Phylogenetically Important Event (PIE) in that situation. Induction resembles stimulus control in that no one-to-one relation exists between induced behavior and the inducing event. If one allowed that some stimulus control were the result of phylogeny, then induction and stimulus control would be identical, and a PIE would resemble a discriminative stimulus. Much evidence supports the idea that a PIE induces all PIE-related activities. Research also supports the idea that stimuli correlated with PIEs become PIE-related conditional inducers. Contingencies create correlations between operant activity (e.g., lever pressing) and PIEs (e.g., food). Once an activity has become PIE-related, the PIE induces it along with other PIE-related activities. Contingencies also constrain possible performances. These constraints specify feedback functions, which explain phenomena such as the higher response rates on ratio schedules in comparison with interval schedules. Allocations that include a lot of operant activity are selected only in the sense that they generate more frequent occurrence of the PIE within the constraints of the situation; contingency and induction do the selecting. PMID:22287807

Baum, William M

2012-01-01

331

Mutually altruistic trends in resources allocation  

NASA Astrophysics Data System (ADS)

Solutions to a series of apparent paradoxes arising in problems dealing with resources allocation under mutually altruistic conditions are presented. In particular, Bergstrom's lovers dilemma (J. Econ. Perspect. 3 (1989) 165) is dealt with as an explicit example of such apparent paradoxes. Bergstrom's discovery of a transition point in utility functions that express altruistic relationships is shown to apply generally to any non-indifferent relationship (and not necessarily altruistic) between consumers, and to general utility functions.

Vadasz, Peter

2005-03-01

332

Adaptive optimal allocation in stratified sampling methods  

E-print Network

In this paper, we propose a stratified sampling algorithm in which the random drawings made in the strata to compute the expectation of interest are also used to adaptively modify the proportion of further drawings in each stratum. These proportions converge to the optimal allocation in terms of variance reduction. And our stratified estimator is asymptotically normal with asymptotic variance equal to the minimal one. Numerical experiments confirm the efficiency of our algorithm.

Jourdain, Benjamin

2007-01-01

333

Do Conglomerate Firms Allocate Resources Inefficiently?  

Microsoft Academic Search

We develop a profit-maximizing neoclassical of optimal firm size and growth across different industries. The model predicts how conglomerate firms will allocate resources across divisions over the business cycle and how their responses to industry shocks will differ from those of single-segment firms. We test our model and find that growth of conglomerate and single-segment firms is related to neoclassical

Gordon M Phillips; Vojislav Maksimovic

1999-01-01

334

Stochastic viscosity solution for stochastic PDIEs with nonlinear Neumann boundary condition  

E-print Network

Stochastic viscosity solution for stochastic PDIEs with nonlinear Neumann boundary condition Abstract This paper is an attempt to extend the notion of viscosity solution to non- linear stochastic, we prove the existence of the stochastic viscosity solution, and further extend the non- linear

Paris-Sud XI, Université de

335

Bayesian Statistics Stochastic Simulation -Gibbs sampling  

E-print Network

Bayesian Statistics Stochastic Simulation - Gibbs sampling Bayesian Statistics - an Introduction Dr Pettit Bayesian Statistics - an Introduction #12;Bayesian Statistics Stochastic Simulation - Gibbs sampling What is Bayesian Statistics? Bayes Theorem The Likelihood Principle Mixtures of conjugate priors

Wright, Francis

336

Stochastic Downscaling Method: Application to Wind Refinement  

E-print Network

wind: dynamical downscaling and statistical downscaling. The dynamical downscaling consistsStochastic Downscaling Method: Application to Wind Refinement September 8, 2008 Stoch. Environ. Res stochastic downscaling method: provided a numerical prediction of wind at large scale, we aim to improve

Paris-Sud XI, Université de

337

Legal briefing: organ donation and allocation.  

PubMed

This issue's "Legal Briefing" column covers legal developments pertaining to organ donation and allocation. This topic has been the subject of recent articles in JCE. Organ donation and allocation have also recently been the subjects of significant public policy attention. In the past several months, legislatures and regulatory agencies across the United States and across the world have changed, or considered changing, the methods for procuring and distributing human organs for transplantation. Currently, in the U.S., more than 100,000 persons are waiting for organ transplantation. In China, more than 1.5 million people are waiting. Given the chronic shortage of available organs (especially kidneys and livers) relative to demand, the primary focus of most legal developments has been on increasing the rate of donation. These and related developments are usefully divided into the following 12 topical categories: 1. Revised Uniform Anatomical Gift Act. 2. Presumed Consent and Opt-Out. 3. Mandated Choice. 4. Donation after Cardiac Death. 5. Payment and Compensation. 6. Donation by Prisoners. 7. Donor Registries. 8. Public Education. 9. Other Procurement Initiatives. 10. Lawsuits and Liability. 11. Trafficking and Tourism. 12. Allocation and Distribution. PMID:21089996

Pope, Thaddeus Mason

2010-01-01

338

Processor Allocation on Cplant: Achieving General Processor Locality Using One-Dimensional Allocation Strategies  

SciTech Connect

The Computational Plant, or Cplant is a commodity-based supercomputer under development at Sandia National Laboratories. This paper describes resource-allocation strategies to achieve processor locality for parallel jobs in Cplant and other supercomputers. Users of Cplant and other Sandia supercomputers submit parallel jobs to a job queue. When a job is scheduled to run, it is assigned to a set of processors. To obtain maximum throughput, jobs should be allocated to localized clusters of processors to minimize communication costs and to avoid bandwidth contention caused by overlapping jobs. This paper introduces new allocation strategies and performance metrics based on space-tilling curves and one dimensional allocation strategies. These algorithms are general and simple. Preliminary simulations and Cplant experiments indicate that both space-filling curves and one-dimensional packing improve processor locality compared to the sorted free list strategy previously used on Cplant. These new allocation strategies are implemented in the new release of the Cplant System Software, Version 2.0, phased into the Cplant systems at Sandia by May 2002.

LEUNG,VITUS J.; ARKIN,ESTHER M.; BENDER,MICHAEL A.; BUNDE,DAVID; JOHNSTON,JEANETTE R.; LAL,ALOK; MITCHELL,JOSEPH S.B.; PHILLIPS,CYNTHIA; SEIDEN,STEVEN S.

2002-07-01

339

Stacking with stochastic cooling  

NASA Astrophysics Data System (ADS)

Accumulation of large stacks of antiprotons or ions with the aid of stochastic cooling is more delicate than cooling a constant intensity beam. Basically the difficulty stems from the fact that the optimized gain and the cooling rate are inversely proportional to the number of particles 'seen' by the cooling system. Therefore, to maintain fast stacking, the newly injected batch has to be strongly 'protected' from the Schottky noise of the stack. Vice versa the stack has to be efficiently 'shielded' against the high gain cooling system for the injected beam. In the antiproton accumulators with stacking ratios up to 10 5 the problem is solved by radial separation of the injection and the stack orbits in a region of large dispersion. An array of several tapered cooling systems with a matched gain profile provides a continuous particle flux towards the high-density stack core. Shielding of the different systems from each other is obtained both through the spatial separation and via the revolution frequencies (filters). In the ' old AA', where the antiproton collection and stacking was done in one single ring, the injected beam was further shielded during cooling by means of a movable shutter. The complexity of these systems is very high. For more modest stacking ratios, one might use azimuthal rather than radial separation of stack and injected beam. Schematically half of the circumference would be used to accept and cool new beam and the remainder to house the stack. Fast gating is then required between the high gain cooling of the injected beam and the low gain stack cooling. RF-gymnastics are used to merge the pre-cooled batch with the stack, to re-create free space for the next injection, and to capture the new batch. This scheme is less demanding for the storage ring lattice, but at the expense of some reduction in stacking rate. The talk reviews the 'radial' separation schemes and also gives some considerations to the 'azimuthal' schemes.

Caspers, Fritz; Mhl, Dieter

2004-10-01

340

The stochastic dance of early HIV infection  

NASA Astrophysics Data System (ADS)

The stochastic nature of early HIV infection is described in a series of models, each of which captures aspects of the dance of HIV during the early stages of infection. It is to this highly variable target that the immune response must respond. The adaptability of the various components of the immune response is an important aspect of the system's operation, as the nature of the pathogens that the response will be required to respond to and the order in which those responses must be made cannot be known beforehand. As HIV infection has direct influence over cells responsible for the immune response, the dance predicts that the immune response will be also in a variable state of readiness and capability for this task of adaptation. The description of the stochastic dance of HIV here will use the tools of stochastic models, and for the most part, simulation. The justification for this approach is that the early stages and the development of HIV diversity require that the model to be able to describe both individual sample path and patient-to-patient variability. In addition, as early viral dynamics are best described using branching processes, the explosive growth of these models both predicts high variability and rapid response of HIV to changes in system parameters.In this paper, a basic viral growth model based on a time dependent continuous-time branching process is used to describe the growth of HIV infected cells in the macrophage and lymphocyte populations. Immigration from the reservoir population is added to the basic model to describe the incubation time distribution. This distribution is deduced directly from the modeling assumptions and the model of viral growth. A system of two branching processes, one in the infected macrophage population and one in the infected lymphocyte population is used to provide a description of the relationship between the development of HIV diversity as it relates to tropism (host cell preference). The role of the immune response to HIV and HIV infected cells is used to describe the movement of the infection from a few infected macrophages to a disease of infected CD4+ T lymphocytes.

Merrill, Stephen J.

2005-12-01

341

Stochastic Navier-Stokes equation and renormalization group theory  

NASA Astrophysics Data System (ADS)

We present an application of a certain renormalization group (RNG) theory developed by Chen, Goldenfeld, and Oono to the stochastic two-dimensional Navier-Stokes equation with additive Gaussian noise and periodic boundary conditions. This article is a generalization of results of Moise and Temam which were for the deterministic equation. Because the classical RNG theory (e.g. in a famous work by Yakhot and Orszag) utilizes significantly on adding noise terms, our work could be another step towards a rigorous understanding of their method.

Blmker, Dirk; Gugg, Christoph; Maier-Paape, Stanislaus

2002-12-01

342

Stochastic Resonance for a SQUID with Dichotomous Resistance  

NASA Astrophysics Data System (ADS)

We investigate the response to the ac current for a superconducting quantum interference device (SQUID) with a dichotomous resistance. It is shown that, for some suitably selected parameters' values, stochastic resonance appears for the amplitude of the stationary average voltage of the SQUID versus the correlation time of the dichotomous noise. Our result can provide some useful insights for the investigation of the response of the SQUID (especially for the ones with the nano junctions) to the temporal-periodic signal (including the input ac current, the irradiation microwave, the detected temporal-periodic signal, and the added ac voltage).

Li, Jing-Hui

2014-03-01

343

The Hamiltonian Mechanics of Stochastic Acceleration  

E-print Network

We show how to find the physical Langevin equation describing the trajectories of particles undergoing collisionless stochastic acceleration. These stochastic differential equations retain not only one-, but two-particle statistics, and inherit the Hamiltonian nature of the underlying microscopic equations. This opens the door to using stochastic variational integrators to perform simulations of stochastic interactions such as Fermi acceleration. We illustrate the theory by applying it to two example problems.

J. W. Burby; A. I. Zhmoginov; H. Qin

2013-12-13

344

The Hamiltonian Mechanics of Stochastic Acceleration  

SciTech Connect

We show how to nd the physical Langevin equation describing the trajectories of particles un- dergoing collisionless stochastic acceleration. These stochastic di erential equations retain not only one-, but two-particle statistics, and inherit the Hamiltonian nature of the underlying microscopic equations. This opens the door to using stochastic variational integrators to perform simulations of stochastic interactions such as Fermi acceleration. We illustrate the theory by applying it to two example problems.

Burby, J. W.

2013-07-17

345

Transport in a stochastic magnetic field  

SciTech Connect

Collisional heat transport in a stochastic magnetic field configuration is investigated. Well above stochastic threshold, a numerical solution of a Chirikov-Taylor model shows a short-time nonlocal regime, but at large time the Rechester-Rosenbluth effective diffusion is confirmed. Near stochastic threshold, subdiffusive behavior is observed for short mean free paths. The nature of this subdiffusive behavior is understood in terms of the spectrum of islands in the stochastic sea.

White, R.B.; Wu, Yanlin (Princeton Univ., NJ (United States). Plasma Physics Lab.); Rax, J.M. (Association Euratom-CEA, Centre d'Etudes Nucleaires de Cadarache, 13 -Saint-Paul-lez-Durance (France). Dept. de Recherches sur la Fusion Controlee)

1992-01-01

346

Transport in a stochastic magnetic field  

SciTech Connect

Collisional heat transport in a stochastic magnetic field configuration is investigated. Well above stochastic threshold, a numerical solution of a Chirikov-Taylor model shows a short-time nonlocal regime, but at large time the Rechester-Rosenbluth effective diffusion is confirmed. Near stochastic threshold, subdiffusive behavior is observed for short mean free paths. The nature of this subdiffusive behavior is understood in terms of the spectrum of islands in the stochastic sea.

White, R.B.; Wu, Yanlin [Princeton Univ., NJ (United States). Plasma Physics Lab.; Rax, J.M. [Association Euratom-CEA, Centre d`Etudes Nucleaires de Cadarache, 13 -Saint-Paul-lez-Durance (France). Dept. de Recherches sur la Fusion Controlee

1992-09-01

347

Nonlinear optimization for stochastic simulations.  

SciTech Connect

This report describes research targeting development of stochastic optimization algorithms and their application to mission-critical optimization problems in which uncertainty arises. The first section of this report covers the enhancement of the Trust Region Parallel Direct Search (TRPDS) algorithm to address stochastic responses and the incorporation of the algorithm into the OPT++ optimization library. The second section describes the Weapons of Mass Destruction Decision Analysis Center (WMD-DAC) suite of systems analysis tools and motivates the use of stochastic optimization techniques in such non-deterministic simulations. The third section details a batch programming interface designed to facilitate criteria-based or algorithm-driven execution of system-of-system simulations. The fourth section outlines the use of the enhanced OPT++ library and batch execution mechanism to perform systems analysis and technology trade-off studies in the WMD detection and response problem domain.

Johnson, Michael M.; Yoshimura, Ann S.; Hough, Patricia Diane; Ammerlahn, Heidi R.

2003-12-01

348

Cardy-Verlinde formula and AdS black holes  

SciTech Connect

In a recent paper by E. Verlinde, hep-th/0008140, an interesting formula has been put forward, which relates the entropy of a conformal formal field in arbitrary dimensions to its total energy and Casimir energy. This formula has been shown to hold for the conformal field theories that have anti{endash}de Sitter (AdS) duals in the cases of AdS Schwarzschild black holes and AdS Kerr black holes. In this paper we further check this formula with various black holes with AdS asymptotics. For the hyperbolic AdS black holes, the Cardy-Verlinde formula is found to hold if we choose the ''massless'' black hole as the ground state, but in this case, the Casimir energy is negative. For the AdS Reissner-Nordstro''m black holes in arbitrary dimensions and charged black holes in D=5, D=4, and D=7 maximally supersymmetric gauged supergravities, the Cardy-Verlinde formula holds as well, but a proper internal energy, which corresponds to the mass of supersymmetric backgrounds, must be subtracted from the total energy. We fail to rewrite the entropy of corresponding conformal field theories in terms of the Cardy-Verlinde formula for the AdS black holes in Lovelock gravity.

Cai, Rong-Gen

2001-06-15

349

Political Ad Critic  

NSDL National Science Digital Library

Brought to you by the folks at Adcritic.com, this Website features sixteen 30-second spots from the Presidential primary and general elections campaign. Political Ad Critic lists a "top ten," with Ralph Nader's hip parody ("The Truth: Priceless") of the popular MasterCard commercials awarded number one, and posts new ads from the campaign each week. Currently, there are four commercials from the Gore campaign posted here -- one of which has Gore speaking Spanish -- and six from Bush's camp, including the now-infamous "bureaucRATS" spot. (The QuickTime control bar allows users to advance frame by frame so they can judge for themselves the commercial's disputed subliminal content.) Commercials from the Libertarian party candidate Harry Browne, and primary contenders John McCain and Bill Bradley round out the Website. May the best commercial win.

350

AdViews  

NSDL National Science Digital Library

The AdViews section of the Internet Archive site contains thousands of vintage television commercials dating from the 1950s to the 1980s. These items of commercial ephemera were created or collected by the ad agency Benton & Bowles or its successor, D'Arcy Masius Benton & Bowles (DMB&B). The commercials are currently found at the John W. Hartman Center for Sales, Advertising & Marketing History in Duke University's David M. Rubenstein Rare Book & Manuscript Library. Visitors will find work created for clients such as Post, Kraft, Old Spice, Pan Am, and many others. As with other Internet Archive collections, visitors can look on the Most Downloaded Items Last Week area. Here they will most likely find advertisements for Charlie's Angels dolls, Borden's Milk, and Sugar Rice Krinkles. Visitors shouldn't miss the Subcollections area, which divides the commercials into their constituent companies, such as Beech Nut Foods, Folgers, and dozens of others.

351

A randomized pilot study of stochastic vibration therapy in spinocerebellar ataxia.  

PubMed

Whole body vibration (WBV) is a biomechanical treatment used widely in professional sports and rehabilitation. We examined the effect of stochastic WBV on ataxia in spinocerebellar ataxia types 1, 2, 3, and 6 (SCA 1, 2, 3 and 6) in a single-center double-blind sham-controlled study. Stochastic WBV was applied on four sequent days, each treatment consisting of five stimulus trains of 60-s duration at a frequency of 6.5Hz and 60-s resting time between stimuli (n?=?17). Patients allocated to the sham group received the same treatment with 1Hz (n?=?15). All patients were rated at baseline and after the last treatment using clinical scores (SARA, SCAFI, and INAS). After treatment, we found significant improvements of gait, posture, and speed of speech in the verum group while limb kinetics and ataxia of speech did not respond. Stochastic WBV might act on proprioceptive mechanisms and could also stimulate non-cerebellar/compensatory mechanisms. But at present, the involved cellular mechanism and the presumed neuronal loops cannot be deciphered. Thus, future work is needed to understand the mechanisms of whole body vibration. Finally, the use of stochastic WBV could provide a supplementation to treat ataxia in SCA and can be combined with physiotherapeutical motor training. PMID:24197754

Kaut, O; Jacobi, H; Coch, C; Prochnicki, A; Minnerop, M; Klockgether, T; Wllner, U

2014-04-01

352

Conjugate Directions for Stochastic Gradient Descent ?  

E-print Network

of Computational Science ETH Zurich, Switzerland fschraudo,graepelg@inf.ethz.ch Abstract. The method of conjugate Stochastic Quadratic Optimization Deterministic bowl. The d-dimensional quadratic bowl provides us, nonlinear problems. The gradient here is #22; g = rf(w) = #22; H(w w #3; ). Stochastic bowl. The stochastic

Schraudolph, Nicol N.

353

Conjugate Directions for Stochastic Gradient Descent  

E-print Network

of Computational Science ETH Z¨urich, Switzerland {schraudo,graepel}@inf.ethz.ch Abstract. The method of conjugate Stochastic Quadratic Optimization Deterministic bowl. The d-dimensional quadratic bowl provides us = f(w) = ¯H(w - w ). Stochastic bowl. The stochastic optimization problem analogous to the deter

Schraudolph, Nicol N.

354

3, 453483, 2012 A stochastic model  

E-print Network

ESDD 3, 453­483, 2012 A stochastic model for the polygonal tundra F. Cresto Aleina et al. Title paper in ESD if available. A stochastic model for the polygonal tundra based on Poisson-Voronoi Diagrams­483, 2012 A stochastic model for the polygonal tundra F. Cresto Aleina et al. Title Page Abstract

Zuyev, Sergei

355

Stochastic approaches for modelling in vivo reactions  

Microsoft Academic Search

In recent years, stochastic modelling has emerged as a physically more realistic al- ternative for modelling in vivo reactions. There are numerous stochastic approaches available in the literature; most of these assume that observed random uctuations are a consequence of the small number of reacting molecules. We review some im- portant developments of the stochastic approach and consider its suitability

Thomas E. Turner; Santiago Schnell; Kevin Burrage

2004-01-01

356

A Learning Criterion for Stochastic Rules  

Microsoft Academic Search

This paper proposes a learning criterion for stochastic rules. This criterion is developed by extending Valiant's PAC (Probably Approximately Correct) learning model, which is a learning criterion for deterministic rules. Stochastic rules here refer to those which probabilistically asign a number of classes, {Y}, to each attribute vector X. The proposed criterion is based on the idea that learning stochastic

Kenji Yamanishi

1992-01-01

357

On deformations of AdS n S n supercosets  

NASA Astrophysics Data System (ADS)

We study the deformed AdS 5 S 5 supercoset model of arXiv:1309.5850 which depends on one parameter ? and has classical quantum group symmetry. We confirm the conjecture that in the "maximal" deformation limit, ? ? ?, this model is T-dual to "flipped" double Wick rotation of the target space AdS 5 S 5, i.e. dS 5 H 5 space supported by an imaginary 5-form flux. In the imaginary deformation limit, ? ? i, the corresponding target space metric is of a pp-wave type and thus the resulting light-cone gauge S-matrix becomes relativistically invariant. Omitting non-unitary contributions of imaginary WZ terms, we find that this tree-level S-matrix is equivalent to that of the generalized sine-Gordon model representing the Pohlmeyer reduction of the undeformed AdS 5 S 5 superstring model. We also study in some detail similar deformations of the AdS 3 S 3 and AdS 2 S 2 supercosets. The bosonic part of the deformed AdS 3 S 3 model happens to be equivalent to the symmetric case of the sum of the Fateev integrable deformation of the SL(2) and SU(2) principal chiral models, while in the AdS 2 S 2 case the role of the Fateev model is played by the 2d "sausage" model. The ? = i limits are again directly related to the Pohlmeyer reductions of the corresponding AdS n S n supercosets: (2,2) super sine-Gordon model and its complex sine-Gordon analog. We also discuss possible deformations of AdS 3 S 3 with more than one parameter.

Hoare, B.; Roiban, R.; Tseytlin, A. A.

2014-06-01

358

Stochastic modeling of Lagrangian accelerations  

NASA Astrophysics Data System (ADS)

It is shown how Sawford's second-order Lagrangian stochastic model (Phys. Fluids A 3, 1577-1586, 1991) for fluid-particle accelerations can be combined with a model for the evolution of the dissipation rate (Pope and Chen, Phys. Fluids A 2, 1437-1449, 1990) to produce a Lagrangian stochastic model that is consistent with both the measured distribution of Lagrangian accelerations (La Porta et al., Nature 409, 1017-1019, 2001) and Kolmogorov's similarity theory. The later condition is found not to be satisfied when a constant dissipation rate is employed and consistency with prescribed acceleration statistics is enforced through fulfilment of a well-mixed condition.

Reynolds, Andy

2002-11-01

359

Stochastic Optimization of Complex Systems  

SciTech Connect

This project focused on methodologies for the solution of stochastic optimization problems based on relaxation and penalty methods, Monte Carlo simulation, parallel processing, and inverse optimization. The main results of the project were the development of a convergent method for the solution of models that include expectation constraints as in equilibrium models, improvement of Monte Carlo convergence through the use of a new method of sample batch optimization, the development of new parallel processing methods for stochastic unit commitment models, and the development of improved methods in combination with parallel processing for incorporating automatic differentiation methods into optimization.

Birge, John R. [University of Chicago

2014-03-20

360

QB1 - Stochastic Gene Regulation  

SciTech Connect

Summaries of this presentation are: (1) Stochastic fluctuations or 'noise' is present in the cell - Random motion and competition between reactants, Low copy, quantization of reactants, Upstream processes; (2) Fluctuations may be very important - Cell-to-cell variability, Cell fate decisions (switches), Signal amplification or damping, stochastic resonances; and (3) Some tools are available to mode these - Kinetic Monte Carlo simulations (SSA and variants), Moment approximation methods, Finite State Projection. We will see how modeling these reactions can tell us more about the underlying processes of gene regulation.

Munsky, Brian [Los Alamos National Laboratory

2012-07-23

361

Schwinger Mechanism with Stochastic Quantization  

E-print Network

We prescribe a formulation of the particle production with real-time Stochastic Quantization. To construct the retarded and the time-ordered propagators we decompose the stochastic variables into positive- and negative-energy parts. In this way we demonstrate how to derive the Schwinger mechanism under a time-dependent electric field. We also discuss a physical interpretation with help of numerical simulations and develop an analogue to the one-dimensional scattering with the non-relativistic Schroedinger equation. We can then reformulate the Schwinger mechanism as the high-energy quantum reflection problem rather than tunneling.

Fukushima, Kenji

2014-01-01

362

Global geometric properties of AdS space and the AdS\\/CFT correspondence  

Microsoft Academic Search

The Poisson kernels and relations between them for a massive scalar field in a unit ball $B^n$ with Hua's metric and conformal flat metric are obtained by describing the $B^n$ as a submanifold of an $(n+1)$-dimensional embedding space. Global geometric properties of the AdS space are discussed. We show that the $(n+1)$-dimensional AdS space AdS$_{n+1}$ is isomorphic to $RP^1\\\\times B^n$

Qi-Keng Lu; Zhe Chang; Han-Ying Guo

2000-01-01

363

A Stochastic Approximation Approach for MaxMin Fair Adaptive Rate Control of ABR Sessions with MCRs  

E-print Network

Rate (MCR) has been introduced. Thus MCR units of bandwidth must be reserved for such a session on all] for a textbook treatment. A few ad­hoc proposals for extending this notion of fairness to the non­zero MCR case have been proposed by the ATM Forum [1]. These include MCR plus max­min share, and allocation

Kumar, Anurag

364

Three Dimensional Origin of AdS_2 Quantum Gravity  

E-print Network

We study AdS_2 quantum gravity with emphasis on consistency with results from AdS_3. We lift AdS_2 black holes to three dimensions and map fluctuations around the solutions. Comparison with near extremal BTZ are discussed, with due emphasis on global aspects. The results confirm that parameters like central charges and conformal weights computed directly in 2D are consistent with standard results in 3D. Applying our results to the thermodynamics of near extreme Kerr black holes, we show that AdS_2 quantum gravity gives the correct central charge c=12J, and the entropy of excitations above the extremal limit is captured correctly.

Alejandra Castro; Cynthia Keeler; Finn Larsen

2010-04-05

365

Supersymmetric warped AdS in extended topologically massive supergravity  

NASA Astrophysics Data System (ADS)

We determine the most general form of off-shell N=(1,1) supergravity field configurations in three dimensions by requiring that at least one off-shell Killing spinor exists. We then impose the field equations of the topologically massive off-shell supergravity and find a class of solutions whose properties crucially depend on the norm of the auxiliary vector field. These are spacelike-squashed and timelike-stretched AdS3 for the spacelike and timelike norms, respectively. At the transition point where the norm vanishes, the solution is null warped AdS3. This occurs when the coefficient of the Lorentz-Chern-Simons term is related to the AdS radius by ??=2. We find that the spacelike-squashed AdS3 can be modded out by a suitable discrete subgroup of the isometry group, yielding an extremal black hole solution which avoids closed timelike curves.

Deger, N. S.; Kaya, A.; Samtleben, H.; Sezgin, E.

2014-07-01

366

Note on new massive gravity in AdS3  

Microsoft Academic Search

In this note we study the properties of linearized gravitational excitations in the new massive gravity theory in asymptotically AdS3 spacetime and find that there is also a critical point for the mass parameter at which massive gravitons become massless as in topological massive gravity in AdS3. However, at this critical point in the new massive gravity the energy of

Yan Liu; Ya-Wen Sun

2009-01-01

367

Toroidal AdS Charged Branes and Toda Equations  

E-print Network

In this note, we consider the equations of motion for charged branes in AdS space and show that they can be cast into one-dimensional coupled Toda type. Then we solve the equations of motion to construct static charged AdS brane solutions which are invariant under translation along $p$ directions and have toroidal symmetry. The solutions are described by mass, charges and a dilaton coupling constant.

Sangheon Yun

2009-10-15

368

Minimal surfaces in AdS space and integrable systems  

Microsoft Academic Search

We consider the Pohlmeyer reduction for spacelike minimal area worldsheets in AdS5. The Lax pair for the reduced theory is found, and written entirely in terms of the A3 = D3 root system, generalizing the B2 affine Toda system which appears for the AdS4 string. For the B2 affine Toda system, we show that the area of the worlsheet is

Benjamin A. Burrington; Peng Gao

2010-01-01

369

From free fields to AdS space. I  

Microsoft Academic Search

Free N=4 super Yang-Mills theory (in the large-N limit) is dual to an, as yet, intractable closed string theory on AdS5S5. We aim to implement open-closed string duality in this system and thereby recast the free-field correlation functions as amplitudes in AdS space. The basic strategy is to implement this duality directly on planar field theory correlation functions in the

Rajesh Gopakumar

2004-01-01

370

Rhazes (865-925AD), the icon of Persian cardiology.  

PubMed

For many long centuries, the function of the human cardiovascular system was an important issue among scholars of different eras and areas. Abubakr Muhammad ibn Zakariyya al-Razi (865-925AD), known by the Latin name Rhazes, was one of the scholars concerned with this issue. This physician is recognized as the first great scientist of the Golden Age of Islamic Medicine (9th-12th centuries AD). He authored Kitab al-Mansuri (Liber Al-Mansuri), a ten-volume medical encyclopedia that covers a large number of medical subjects. The first chapter of this book is allocated to human anatomy and functions. In this article, we review the chapter from Al-Mansuri that deals with Rhazes' views on the cardiovascular system. PMID:25465822

Mahmoudi Nezhad, Golnoush Sadat; Dalfardi, Behnam

2014-11-01

371

Universality in stochastic exponential growth.  

PubMed

Recent imaging data for single bacterial cells reveal that their mean sizes grow exponentially in time and that their size distributions collapse to a single curve when rescaled by their means. An analogous result holds for the division-time distributions. A model is needed to delineate the minimal requirements for these scaling behaviors. We formulate a microscopic theory of stochastic exponential growth as a Master Equation that accounts for these observations, in contrast to existing quantitative models of stochastic exponential growth (e.g., the Black-Scholes equation or geometric Brownian motion). Our model, the stochastic Hinshelwood cycle (SHC), is an autocatalytic reaction cycle in which each molecular species catalyzes the production of the next. By finding exact analytical solutions to the SHC and the corresponding first passage time problem, we uncover universal signatures of fluctuations in exponential growth and division. The model makes minimal assumptions, and we describe how more complex reaction networks can reduce to such a cycle. We thus expect similar scalings to be discovered in stochastic processes resulting in exponential growth that appear in diverse contexts such as cosmology, finance, technology, and population growth. PMID:25062238

Iyer-Biswas, Srividya; Crooks, Gavin E; Scherer, Norbert F; Dinner, Aaron R

2014-07-11

372

Multi-horizon stochastic programming  

E-print Network

Aug 26, 2013 ... The model is a two-stage stochastic model where a supply chain is designed in .... at least in regions with cold winters, it can be expected that the reservoirs will be ..... Planning and Logistics, World Scientific Series in Finance.

2013-08-26

373

Functional Approach to Stochastic Inflation  

E-print Network

We propose functional approach to the stochastic inflationary universe dynamics. It is based on path integral representation of the solution to the differential equation for the scalar field probability distribution. In the saddle-point approximation scalar field probability distributions of various type are derived and the statistics of the inflationary-history-dependent functionals is developed.

Yuri V. Shtanov

1994-07-22

374

Universality in stochastic exponential growth  

E-print Network

Recent imaging data for single bacterial cells reveal that their mean sizes grow exponentially in time and that their size distributions collapse to a single curve when rescaled by their means. An analogous result holds for the division-time distributions. A model is needed to delineate the minimal requirements for these scaling behaviors. We formulate a microscopic theory of stochastic exponential growth as a Master Equation that accounts for these observations, in contrast to existing quantitative models of stochastic exponential growth (e.g., the Black-Scholes equation or geometric Brownian motion). Our model, the stochastic Hinshelwood cycle (SHC), is an autocatalytic reaction cycle in which each molecular species catalyzes the production of the next. By finding exact analytical solutions to the SHC and the corresponding first passage time problem, we uncover universal signatures of fluctuations in exponential growth and division. The model makes minimal assumptions, and we describe how more complex reaction networks can reduce to such a cycle. We thus expect similar scalings to be discovered in stochastic processes resulting in exponential growth that appear in diverse contexts such as cosmology, finance, technology, and population growth.

Srividya Iyer-Biswas; Gavin E. Crooks; Norbert F. Scherer; Aaron R. Dinner

2014-07-10

375

Universality in Stochastic Exponential Growth  

NASA Astrophysics Data System (ADS)

Recent imaging data for single bacterial cells reveal that their mean sizes grow exponentially in time and that their size distributions collapse to a single curve when rescaled by their means. An analogous result holds for the division-time distributions. A model is needed to delineate the minimal requirements for these scaling behaviors. We formulate a microscopic theory of stochastic exponential growth as a Master Equation that accounts for these observations, in contrast to existing quantitative models of stochastic exponential growth (e.g., the Black-Scholes equation or geometric Brownian motion). Our model, the stochastic Hinshelwood cycle (SHC), is an autocatalytic reaction cycle in which each molecular species catalyzes the production of the next. By finding exact analytical solutions to the SHC and the corresponding first passage time problem, we uncover universal signatures of fluctuations in exponential growth and division. The model makes minimal assumptions, and we describe how more complex reaction networks can reduce to such a cycle. We thus expect similar scalings to be discovered in stochastic processes resulting in exponential growth that appear in diverse contexts such as cosmology, finance, technology, and population growth.

Iyer-Biswas, Srividya; Crooks, Gavin E.; Scherer, Norbert F.; Dinner, Aaron R.

2014-07-01

376

Stochastic Resonance and Information Processing  

NASA Astrophysics Data System (ADS)

A dynamical system giving rise to multiple steady states and subjected to noise and a periodic forcing is analyzed from the standpoint of information theory. It is shown that stochastic resonance has a clearcut signature on information entropy, information transfer and other related quantities characterizing information transduction within the system.

Nicolis, C.

2014-12-01

377

Domain Theory in Stochastic Processes  

Microsoft Academic Search

We establish domain-theoretic models of finite-statediscrete stochastic processes, Markov processes andvector recurrent iterated function systems. In eachcase, we show that the distribution of the stochasticprocess is canonically obtained as the least upper boundof an increasing chain of simple valuations in a probabilisticpower domain associated to the process. Thisleads to various formulas and algorithms to computethe expected values of functions which

Abbas Edalat

1995-01-01

378

Adding Slide Rule  

NSDL National Science Digital Library

In this activity, students construct adding slide rules, scaled with linear calibrations like ordinary rulers. Students learn to move these scales relative to each other in ways that add and subtract distances, thus calculating sums and differences. This is Activity A1 in the "Far Out Math" educator's guide. Lessons within the guide include activities in which students measure, compare quantities as orders of magnitude, use scientific notation, and develop an understanding of exponents and logarithms using examples from NASA's GLAST mission. These are skills needed to understand the very large and very small quantities characteristic of astronomical observations. Note: In 2008, the GLAST mission was renamed Fermi, for the physicist Enrico Fermi.

379

The constraint algebra of topologically massive AdS gravity  

Microsoft Academic Search

Three-dimensional topologically massive AdS gravity has a complicated constraint algebra, making it difficult to count nonperturbative degrees of freedom. I show that a new choice of variables greatly simplifies this algebra, and confirm that the theory contains a single propagating mode for all values of the mass parameter and the cosmological constant. As an added benefit, I rederive the central

S. Carlip

2008-01-01

380

[Value-Added--Adding Economic Value in the Food Industry].  

ERIC Educational Resources Information Center

This booklet focuses on the economic concept of "value added" to goods and services. A student activity worksheet illustrates how the steps involved in processing food are examples of the concept of value added. The booklet further links food processing to the idea of value added to the Gross National Product (GNP). Discussion questions, a student

Welch, Mary A., Ed.

1989-01-01

381

Two Virasoro symmetries in stringy warped AdS$_3$  

E-print Network

We study three-dimensional consistent truncations of type IIB supergravity which admit warped AdS$_3$ solutions. These theories contain subsectors that have no bulk dynamics. We show that the symplectic form for these theories, when restricted to the non-dynamical subsectors, equals the symplectic form for pure Einstein gravity in AdS$_3$. Consequently, for each consistent choice of boundary conditions in AdS$_3$, we can define a consistent phase space in warped AdS$_3$ with identical conserved charges. This way, we easily obtain a Virasoro $\\times$ Virasoro asymptotic symmetry algebra in warped AdS$_3$; two different types of Virasoro $\\times$ Ka\\v{c}-Moody symmetries are also consistent alternatives. Next, we study the phase space of these theories when propagating modes are included. We show that, as long as one can define a conserved symplectic form without introducing instabilities, the Virasoro $\\times$ Virasoro asymptotic symmetries can be extended to the entire (linearized) phase space. This implies that, at least at semi-classical level, consistent theories of gravity in warped AdS$_3$ are described by a two-dimensional conformal field theory, as long as stability is not an issue.

Geoffrey Compre; Monica Guica; Maria J. Rodriguez

2014-07-29

382

Prey risk allocation in a grazing ecosystem.  

PubMed

Understanding the behaviorally mediated indirect effects of predators in ecosystems requires knowledge of predator-prey behavioral interactions. In predator-ungulate-plant systems, empirical research quantifying how predators affect ungulate group sizes and distribution, in the context of other influential variables, is particularly needed. The risk allocation hypothesis proposes that prey behavioral responses to predation risk depend on background frequencies of exposure to risk, and it can be used to make predictions about predator-ungulate-plant interactions. We determined non-predation variables that affect elk (Cervus elaphus) group sizes and distribution on a winter range in the Greater Yellowstone Ecosystem (GYE) using logistic and log-linear regression on surveys of 513 1-km2 areas conducted over two years. Employing model selection techniques, we evaluated risk allocation and other a priori hypotheses of elk group size and distributional responses to wolf (Canis lupus) predation risk while accounting for influential non-wolf-predation variables. We found little evidence that wolves affect elk group sizes, which were strongly influenced by habitat type and hunting by humans. Following predictions from the risk allocation hypothesis, wolves likely created a more dynamic elk distribution in areas that they frequently hunted, as elk tended to move following wolf encounters in those areas. This response should dilute elk foraging pressure on plant communities in areas where they are frequently hunted by wolves. We predict that this should decrease the spatial heterogeneity of elk impacts on grasslands in areas that wolves frequently hunt. We also predict that this should decrease browsing pressure on heavily browsed woody plant stands in certain areas, which is supported by recent research in the GYE. PMID:16705980

Gude, Justin A; Garrott, Robert A; Borkowski, John J; King, Fred

2006-02-01

383

Sensor network-based multi-robot task allocation  

Microsoft Academic Search

We present DINTA, distributed in-network task allocation - a novel paradigm for multi-robot task allocation (MRTA) where tasks are allocated implicitly to robots by a pre-deployed, static sensor network. Experimental results with a simulated alarm scenario show that our approach is able to compute solutions to the MRTA problem in a distributed fashion. We compared our approach to a strategy

Maxim A. Batalin; Gaurav S. Sukhatme

2003-01-01

384

Generalized quality-of-service routing with resource allocation  

Microsoft Academic Search

We present a general framework for the problem of quality-of-service (QoS) routing with resource allocation for data networks. The framework represents the QoS parameters as functions rather than static metrics. The formulation incorporates the hardware\\/software implementation and its relation to the allocated resources into a single framework. The proposed formulation allows intelligent adaptation of QoS parameters and allocated resources during

Ahmed R. Bashandy; Edwin K. P. Chong; Arif Ghafoor

2005-01-01

385

New national allocation policy for deceased donor kidneys in the United States and possible effect on patient outcomes.  

PubMed

In 2013, the Organ Procurement and Transplantation Network in the United States approved a new national deceased donor kidney allocation policy that introduces the kidney donor profile index (KDPI), which gives scores of 0%-100% based on 10 donor factors. Kidneys with lower KDPI scores are associated with better post-transplant survival. Important features of the new policy include first allocating kidneys from donors with a KDPI?20% to candidates in the top 20th percentile of estimated post-transplant survival, adding waiting time from dialysis initiation, conferring priority points for a calculated panel-reactive antibody (CPRA)>19%, broader sharing of kidneys for candidates with a CPRA?99%, broader sharing of kidneys from donors with a KDPI>85%, eliminating the payback system, and allocating blood type A2 and A2B kidneys to blood type B candidates. We simulated the distribution of kidneys under the new policy compared with the current allocation policy. The simulation showed increases in projected median allograft years of life with the new policy (9.07 years) compared with the current policy (8.82 years). With the new policy, candidates with a CPRA>20%, with blood type B, and aged 18-49 years were more likely to undergo transplant, but transplants declined in candidates aged 50-64 years (4.1% decline) and ?65 years (2.7% decline). These simulations demonstrate that the new deceased donor kidney allocation policy may improve overall post-transplant survival and access for highly sensitized candidates, with minimal effects on access to transplant by race/ethnicity and declines in kidney allocation for candidates aged ?50 years. PMID:24833128

Israni, Ajay K; Salkowski, Nicholas; Gustafson, Sally; Snyder, Jon J; Friedewald, John J; Formica, Richard N; Wang, Xinyue; Shteyn, Eugene; Cherikh, Wida; Stewart, Darren; Samana, Ciara J; Chung, Adrine; Hart, Allyson; Kasiske, Bertram L

2014-08-01

386

Energy allocation by yellow bellied marmots  

E-print Network

of aboveground activity are the major modifiers of DEE for animals of a given age, sex, and reproduct ive status. Activity costs range from 36% of DEE for 911 at MM in July 1983 to 53% for 966 at MM in J u n e 1984 and 573 at PIC in July 1983. Reproduct ive.... The present study investigated these suggestions by quantifying energy intake and expendi ture of free-rang ing marmots, and compared patterns of energy intake and allocation among animals of different sex, age, and reproductive status. Material...

Armitage, Kenneth

1989-01-01

387

Algorithmic advances in stochastic programming  

SciTech Connect

Practical planning problems with deterministic forecasts of inherently uncertain parameters often yield unsatisfactory solutions. Stochastic programming formulations allow uncertain parameters to be modeled as random variables with known distributions, but the size of the resulting mathematical programs can be formidable. Decomposition-based algorithms take advantage of special structure and provide an attractive approach to such problems. We consider two classes of decomposition-based stochastic programming algorithms. The first type of algorithm addresses problems with a ``manageable`` number of scenarios. The second class incorporates Monte Carlo sampling within a decomposition algorithm. We develop and empirically study an enhanced Benders decomposition algorithm for solving multistage stochastic linear programs within a prespecified tolerance. The enhancements include warm start basis selection, preliminary cut generation, the multicut procedure, and decision tree traversing strategies. Computational results are presented for a collection of ``real-world`` multistage stochastic hydroelectric scheduling problems. Recently, there has been an increased focus on decomposition-based algorithms that use sampling within the optimization framework. These approaches hold much promise for solving stochastic programs with many scenarios. A critical component of such algorithms is a stopping criterion to ensure the quality of the solution. With this as motivation, we develop a stopping rule theory for algorithms in which bounds on the optimal objective function value are estimated by sampling. Rules are provided for selecting sample sizes and terminating the algorithm under which asymptotic validity of confidence interval statements for the quality of the proposed solution can be verified. Issues associated with the application of this theory to two sampling-based algorithms are considered, and preliminary empirical coverage results are presented.

Morton, D.P.

1993-07-01

388

Stochastic resonance in visual sensitivity.  

PubMed

It is well known from psychophysical studies that stochastic resonance, in its simplest threshold paradigm, can be used as a tool to measure the detection sensitivity to fine details in noise contaminated stimuli. In the present manuscript, we report simulation studies conducted in the similar threshold paradigm of stochastic resonance. We have estimated the contrast sensitivity in detecting noisy sine-wave stimuli, with varying area and spatial frequency, as a function of noise strength. In all the cases, the measured sensitivity attained a peak at intermediate noise strength, which indicate the occurrence of stochastic resonance. The peak sensitivity exhibited a strong dependence on area and spatial frequency of the stimulus. We show that the peak contrast sensitivity varies with spatial frequency in a nonmonotonic fashion and the qualitative nature of the sensitivity variation is in good agreement with human contrast sensitivity function. We also demonstrate that the peak sensitivity first increases and then saturates with increasing area, and this result is in line with the results of psychophysical experiments. Additionally, we also show that critical area, denoting the saturation of contrast sensitivity, decreases with spatial frequency and the associated maximum contrast sensitivity varies with spatial frequency in a manner that is consistent with the results of psychophysical experiments. In all the studies, the sensitivities were elevated via a nonlinear filtering operation called stochastic resonance. Because of this nonlinear effect, it was not guaranteed that the sensitivities, estimated at each frequency, would be in agreement with the corresponding results of psychophysical experiments; on the contrary, close agreements were observed between our results and the findings of psychophysical investigations. These observations indicate the utility of stochastic resonance in human vision and suggest that this paradigm can be useful in psychophysical studies. PMID:25398687

Kundu, Ajanta; Sarkar, Sandip

2014-11-15

389

Survey of Transmission Cost Allocation Methodologies for Regional Transmission Organizations  

SciTech Connect

The report presents transmission cost allocation methodologies for reliability transmission projects, generation interconnection, and economic transmission projects for all Regional Transmission Organizations.

Fink, S.; Porter, K.; Mudd, C.; Rogers, J.

2011-02-01

390

Data-driven resource allocation decisions : FEMA's disaster recovery centers  

E-print Network

Resource allocation decisions in post-disaster operations are challenging because of situational dynamics, insufficient information, organizational culture, political context, and urgency. We propose a methodology to create ...

Moline, Julia N. (Julia Nessa)

2014-01-01

391

Adding Value to Agricultural Products  

E-print Network

You can significantly increase farm income by adding value to agricultural products and marketing those products effectively. This publication explains how to design a value-added product based on consumer preferences and how to build a business...

Anderson, David P.; Hanselka, Daniel

2009-06-01

392

Study on Collaboration Mechanisms of Information Resources Allocation Strategy in National Innovation System  

Microsoft Academic Search

Abstract-Information resources allocation strategy is the foundation of allocation activities development, is the overall plan and arrangement for a long-term allocation goal, implementation program and operation mechanism. According to the national innovation and development requirements, this study combined synergetic theory with traditional information resources allocation theory to analyze information resources allocation strategy collaboration mechanisms and collaboration evolution processes in National

Zeng Jianxun; Zhao Yang; Zhang Xiaodong

2010-01-01

393

Quadratic Programming for Allocating Control Effort  

NASA Technical Reports Server (NTRS)

A computer program calculates an optimal allocation of control effort in a system that includes redundant control actuators. The program implements an iterative (but otherwise single-stage) algorithm of the quadratic-programming type. In general, in the quadratic-programming problem, one seeks the values of a set of variables that minimize a quadratic cost function, subject to a set of linear equality and inequality constraints. In this program, the cost function combines control effort (typically quantified in terms of energy or fuel consumed) and control residuals (differences between commanded and sensed values of variables to be controlled). In comparison with prior control-allocation software, this program offers approximately equal accuracy but much greater computational efficiency. In addition, this program offers flexibility, robustness to actuation failures, and a capability for selective enforcement of control requirements. The computational efficiency of this program makes it suitable for such complex, real-time applications as controlling redundant aircraft actuators or redundant spacecraft thrusters. The program is written in the C language for execution in a UNIX operating system.

Singh, Gurkirpal

2005-01-01

394

Optimal resource allocation in cellular sensing systems.  

PubMed

Living cells deploy many resources to sense their environments, including receptors, downstream signaling molecules, time, and fuel. However, it is not known which resources fundamentally limit the precision of sensing, like weak links in a chain, and which can compensate each other, leading to trade-offs between them. We present a theory for the optimal design of the large class of sensing systems in which a receptor drives a push-pull network. The theory identifies three classes of resources that are required for sensing: receptors and their integration time, readout molecules, and energy (fuel turnover). Each resource class sets a fundamental sensing limit, which means that the sensing precision is bounded by the limiting resource class and cannot be enhanced by increasing another class--the different classes cannot compensate each other. This result yields a previously unidentified design principle, namely that of optimal resource allocation in cellular sensing. It states that, in an optimally designed sensing system, each class of resources is equally limiting so that no resource is wasted. We apply our theory to what is arguably the best-characterized sensing system in biology, the chemotaxis network of Escherichia coli. Our analysis reveals that this system obeys the principle of optimal resource allocation, indicating a selective pressure for the efficient design of cellular sensing systems. PMID:25422473

Govern, Christopher C; Ten Wolde, Pieter Rein

2014-12-01

395

Environmental flow allocation and statistics calculator  

USGS Publications Warehouse

The Environmental Flow Allocation and Statistics Calculator (EFASC) is a computer program that calculates hydrologic statistics based on a time series of daily streamflow values. EFASC will calculate statistics for daily streamflow in an input file or will generate synthetic daily flow series from an input file based on rules for allocating and protecting streamflow and then calculate statistics for the synthetic time series. The program reads dates and daily streamflow values from input files. The program writes statistics out to a series of worksheets and text files. Multiple sites can be processed in series as one run. EFASC is written in MicrosoftRegistered Visual BasicCopyright for Applications and implemented as a macro in MicrosoftOffice Excel 2007Registered. EFASC is intended as a research tool for users familiar with computer programming. The code for EFASC is provided so that it can be modified for specific applications. All users should review how output statistics are calculated and recognize that the algorithms may not comply with conventions used to calculate streamflow statistics published by the U.S. Geological Survey.

Konrad, Christopher P.

2011-01-01

396

An Approach for Transmission Loss and Cost Allocation by Loss Allocation Index and Co-operative Game Theory  

NASA Astrophysics Data System (ADS)

In the present work authors proposed a novel method for transmission loss and cost allocation to users (generators and loads). In the developed methodology transmission losses are allocated to users based on their usage of the transmission line. After usage allocation, particular loss allocation indices (PLAI) are evaluated for loads and generators. Also Cooperative game theory approach is applied for comparison of results. The proposed method is simple and easy to implement on the practical power system. Sample 6 bus and IEEE 14 bus system is used for showing the effectiveness of proposed method.

Khan, Baseem; Agnihotri, Ganga; Mishra, Anuprita S.

2014-12-01

397

Global geometric properties of AdS space and the AdS/CFT correspondence  

E-print Network

The Poisson kernels and relations between them for a massive scalar field in a unit ball $B^n$ with Hua's metric and conformal flat metric are obtained by describing the $B^n$ as a submanifold of an $(n+1)$-dimensional embedding space. Global geometric properties of the AdS space are discussed. We show that the $(n+1)$-dimensional AdS space AdS$_{n+1}$ is isomorphic to $RP^1\\times B^n$ and boundary of the AdS is isomorphic to $RP^1\\times S^{n-1}$. Bulk-boundary propagator and the AdS/CFT like correspondence are demonstrated based on these global geometric properties of the $RP^1\\times B^n$.

Qi-Keng Lu; Zhe Chang; Han-Ying Guo

2000-08-30

398

Adding and Subtracting Integers  

NSDL National Science Digital Library

Now that you have mastered the common math operations of adding, subtracting, multiplying and dividing, you are ready to tackle some more challenging, yet practical problems. For example: How much money do you have if your Mom paid you $20 for every time you mowed the lawn, but you had to pay your little brother $5 for every time he helped you, and together you accomplished the job 7 times? Or how about this one: if you picked 5 apples but 2 were rotten and you had to divide them equally between you and your five friends, how much would each person get? Current Knowledge You will need a piece of paper to record information and to write down examples, so grab one now. Number the paper from 1 to 10. Get with a partner and write down how you think the equations to solve the above problems will be written. Write these ...

Richins, Mrs.

2008-09-10

399

Final Technical Report - Stochastic Nonlinear Data-Reduction Methods with Detection and Prediction of Critical Rare Event  

SciTech Connect

In this project, the collective efforts of all co-PIs aim to address three current limitations in modeling stochastic systems: (1) the inputs are mostly based on ad hoc models, (2) the number of independent parameters is very high, and (3) rare and critical events are difficult to capture with existing algorithms

Karniadakis, George Em; Vanden-Eijnden, Eric; Lin, Guang; Wan, Xiaoliang

2013-04-03

400

Large rotating AdS black holes from fluid mechanics  

E-print Network

We use the AdS/CFT correspondence to argue that large rotating black holes in global AdS(D) spaces are dual to stationary solutions of the relativistic Navier-Stokes equations on S**(D-2). Reading off the equation of state of this fluid from the thermodynamics of non-rotating black holes, we proceed to construct the nonlinear spinning solutions of fluid mechanics that are dual to rotating black holes. In all known examples, the thermodynamics and the local stress tensor of our solutions are in precise agreement with the thermodynamics and boundary stress tensor of the spinning black holes. Our fluid dynamical description applies to large non-extremal black holes as well as a class of large non-supersymmetric extremal black holes, but is never valid for supersymmetric black holes. Our results yield predictions for the thermodynamics of all large black holes in all theories of gravity on AdS spaces, for example, string theory on AdS(5) x S**5 and M theory on AdS(4) x S**7 and AdS(7) x S**4.

Sayantani Bhattacharyya; Subhaneil Lahiri; R. Loganayagam; Shiraz Minwalla

2007-08-14

401

Land Resources Allocation Strategies in an Urban Area Involving Uncertainty: A Case Study of Suzhou, in the Yangtze River Delta of China  

NASA Astrophysics Data System (ADS)

A large number of mathematical models have been developed to support land resource allocation decisions and land management needs; however, few of them can address various uncertainties that exist in relation to many factors presented in such decisions (e.g., land resource availabilities, land demands, land-use patterns, and social demands, as well as ecological requirements). In this study, a multi-objective interval-stochastic land resource allocation model (MOISLAM) was developed for tackling uncertainty that presents as discrete intervals and/or probability distributions. The developed model improves upon the existing multi-objective programming and inexact optimization approaches. The MOISLAM not only considers economic factors, but also involves food security and eco-environmental constraints; it can, therefore, effectively reflect various interrelations among different aspects in a land resource management system. Moreover, the model can also help examine the reliability of satisfying (or the risk of violating) system constraints under uncertainty. In this study, the MOISLAM was applied to a real case of long-term urban land resource allocation planning in Suzhou, in the Yangtze River Delta of China. Interval solutions associated with different risk levels of constraint violation were obtained. The results are considered useful for generating a range of decision alternatives under various system conditions, and thus helping decision makers to identify a desirable land resource allocation strategy under uncertainty.

Lu, Shasha; Guan, Xingliang; Zhou, Min; Wang, Yang

2014-05-01

402

Stochastic Modeling of Soil Salinity  

E-print Network

A minimalist stochastic model of primary soil salinity is proposed, in which the rate of soil salinization is determined by the balance between dry and wet salt deposition and the intermittent leaching events caused by rainfall events. The long term probability density functions of salt mass and concentration are found by reducing the coupled soil moisture and salt mass balance equation to a single stochastic differential equation driven by multiplicative Poisson noise. The novel analytical solutions provide insight on the interplay of the main soil, plant and climate parameters responsible for long-term soil salinization. In particular, they show the existence of two distinct regimes, one where the mean salt mass remains nearly constant (or decreases) with increasing rainfall frequency, and another where mean salt content increases markedly with increasing rainfall frequency. As a result, relatively small reductions of rainfall in drier climates may entail dramatic shifts in long-term soil salinization trend...

Suweis, S; Van der Zee, S E A T M; Daly, E; Maritan, A; Porporato, A; 10.1029/2010GL042495

2012-01-01

403

Stochastic scanning multiphoton multifocal microscopy.  

PubMed

Multiparticle tracking with scanning confocal and multiphoton fluorescence imaging is increasingly important for elucidating biological function, as in the transport of intracellular cargo-carrying vesicles. We demonstrate a simple rapid-sampling stochastic scanning multifocal multiphoton microscopy (SS-MMM) fluorescence imaging technique that enables multiparticle tracking without specialized hardware at rates 1,000 times greater than conventional single point raster scanning. Stochastic scanning of a diffractive optic generated 10x10 hexagonal array of foci with a white noise driven galvanometer yields a scan pattern that is random yet space-filling. SS-MMM creates a more uniformly sampled image with fewer spatio-temporal artifacts than obtained by conventional or multibeam raster scanning. SS-MMM is verified by simulation and experimentally demonstrated by tracking microsphere diffusion in solution. PMID:19516485

Jureller, Justin E; Kim, Hee Y; Scherer, Norbert F

2006-04-17

404

Stochastic dynamics of cholera epidemics  

NASA Astrophysics Data System (ADS)

We describe the predictions of an analytically tractable stochastic model for cholera epidemics following a single initial outbreak. The exact model relies on a set of assumptions that may restrict the generality of the approach and yet provides a realm of powerful tools and results. Without resorting to the depletion of susceptible individuals, as usually assumed in deterministic susceptible-infected-recovered models, we show that a simple stochastic equation for the number of ill individuals provides a mechanism for the decay of the epidemics occurring on the typical time scale of seasonality. The model is shown to provide a reasonably accurate description of the empirical data of the 2000/2001 cholera epidemic which took place in the Kwa Zulu-Natal Province, South Africa, with possibly notable epidemiological implications.

Azaele, Sandro; Maritan, Amos; Bertuzzo, Enrico; Rodriguez-Iturbe, Ignacio; Rinaldo, Andrea

2010-05-01

405

The Allocation of Materials Funds. SPEC Kit 36.  

ERIC Educational Resources Information Center

This Association of Research Libraries (ARL) kit contains source documents providing information on the general background, statistics/criteria, formulas, and decision-making processes used in the allocation of materials funds in academic libraries. The kit comprises: (1) a working paper on "Guidelines for the Allocation of Library Materials

Association of Research Libraries, Washington, DC. Office of Management Studies.

406

Allocating Uncertain and Unresponsive Resources: An Experimental Approach  

Microsoft Academic Search

We identify an important class of economic problems that arise naturally in several applications: the allocation of multiple resources when there are uncertainties in demand or supply, unresponsive supplies (no inventories and fixed capacities), and significant demand indivisibilities (rigidities). Examples of such problems include: scheduling job shops, airports, or supercomputers; zero-inventory planning; and the allocation and pricing of NASA's planned

Jeffrey S. Banks; John O. Ledyard; David P. Porter

1989-01-01

407

Economic Models for Allocating Resources in Computer Systems  

Microsoft Academic Search

this paper, we discuss the similarities between complex distributed systems and humaneconomies. We demonstrate how competitive economic models provide algorithms and toolsfor allocating resources in distributed computer systems. Several different computer systemresource allocation problems are presented and economic based algorithms for allocatingresources are evaluated.1.1 Motivation and goals

Donald F. Ferguson; Christos Nikolaou; Jakka Sairamesh; Yechiam Yemini

1996-01-01

408

Optimal risk allocation for convex risk functionals in general domains  

E-print Network

Optimal risk allocation for convex risk functionals in general domains Swen Kiesel and Ludger R¨uschendorf University of Freiburg Abstract In this paper we extend the classical optimal risk allocation problem to the case of general convex risk functionals defined on real Banach spaces. In particular we characterize

Rüschendorf, Ludger

409

Risk measures for portfolio vectors and allocation of risks  

E-print Network

1 Risk measures for portfolio vectors and allocation of risks Ludger R¨uschendorf University we survey some recent developments on risk measures for portfolio vectors and on the allocation of risk problem. The main purpose to study risk measures for portfolio vectors X = (X1, . . . , Xd

Rüschendorf, Ludger

410

Optimal Stock Allocation for a Capacitated Supply System  

E-print Network

Optimal Stock Allocation for a Capacitated Supply System Francis de Véricourt · Fikri Karaesmen that is demanded by several classes of customers. Each customer class may have a different backorder cost, so stock allocation arises as a key decision problem. We model the supply system as a multicustomer make-to-stock

Karaesmen, Fikri

411

Allocation of buffers to serial production lines with bottlenecks  

Microsoft Academic Search

The optimal placement of a predetermined amount of buffer capacity in balanced serial production lines is a well-understood problem: in lines with moderate variability, the optimal allocation involves equal numbers of buffers at each site; in lines with severe variability, the equal allocation is modified slightly to place more buffers toward the center of the line. Buffering unbalanced lines is

STEPHEN G. POWELL; DAVID F. PYKE

1996-01-01

412

Analysis of Dynamic Task Allocation in Multi-Robot Systems  

E-print Network

Analysis of Dynamic Task Allocation in Multi-Robot Systems Kristina Lerman1 , Chris Jones2 , Aram of Southern California, Los Angeles, CA 90089-0781, USA {lerman|galstyan}@isi.edu, {cvjones|maja}@robotics.usc.edu Abstract Dynamic task allocation is an essential requirement for multi-robot systems functioning in unknown

Lerman, Kristina

413

Allocation of Students in Public Schools: Theory and New Evidence  

ERIC Educational Resources Information Center

The allocation of educational resources to students of different socio-economic backgrounds has important policy implications since it affects individual educational outcomes as well as the future distribution of human capital. In this paper, we present a theoretical model showing that local school administrators have an incentive to allocate

Cohen-Zada, Danny; Gradstein, Mark; Reuven, Ehud

2013-01-01

414

EVALUATING ENERGY-AWARE TASK ALLOCATION STRATEGIES FOR MPSOCS  

E-print Network

EVALUATING ENERGY-AWARE TASK ALLOCATION STRATEGIES FOR MPSOCS Fabio Wronski, Eduardo Wenzel Brião of current market trends, the evaluation of task allocation strategies in multiprocessor system strategies in MPSoCs, these two types of simulation models must be combined, since communication

Wagner, Flávio Rech

415

Multiuser OFDM with adaptive subcarrier, bit, and power allocation  

Microsoft Academic Search

Multiuser orthogonal frequency division multiplexing (OFDM) with adaptive multiuser subcarrier allocation and adaptive modulation is considered. Assuming knowledge of the instantaneous channel gains for all users, we propose a multiuser OFDM subcarrier, bit, and power allocation algorithm to minimize the total transmit power. This is done by assigning each user a set of subcarriers and by determining the number of

Cheong Yui Wong; Roger S. Cheng; K. B. Lataief; Ross D. Murch

1999-01-01

416

Optimal power allocation over parallel Gaussian broadcast channels  

Microsoft Academic Search

We analyze the problem of communication over a set of parallel Gaussian broadcast channels, each with a different set of noise power for the users. We show that capacity can be achieved by optimal power allocation over the channels, and obtain an explicit characterization of the optimal power allocations and the resulting capacity region

David N. C. Tse

1997-01-01

417

TASK ALLOCATION METHODOLOGIES FOR MULTI-ROBOT SYSTEMS  

E-print Network

1 TASK ALLOCATION METHODOLOGIES FOR MULTI-ROBOT SYSTEMS Khashayar R. Baghaei Arvin Agah Technical the tasks accordingly. This paper presents ten such task allocation methodologies for multi-robot systems The University of Kansas, Lawrence, Kansas 66045 ABSTRACT One of most important aspects in the design of multi-robot

Kansas, University of

418

On Two-Stage Portfolio Allocation Problems with Affine Recourse  

E-print Network

On Two-Stage Portfolio Allocation Problems with Affine Recourse Giuseppe Calafiore and Marco C policy for the solution of multi-stage optimization problems that arise in the context of allocation of financial portfolios over multiple periods. Such problems are typically dealt with using the multi-stage

Campi, Marco

419

34 CFR 300.703 - Allocations to States.  

Code of Federal Regulations, 2012 CFR

...this section for a fiscal year is equal to or greater...for the preceding fiscal year, those allocations are...provided in paragraph (c)(2) of this section, the...allocates for the fiscal year (A) To each State...populations of children aged 3 through 21 who...

2012-07-01

420

34 CFR 300.703 - Allocations to States.  

Code of Federal Regulations, 2014 CFR

...this section for a fiscal year is equal to or greater...for the preceding fiscal year, those allocations are...provided in paragraph (c)(2) of this section, the...allocates for the fiscal year (A) To each State...populations of children aged 3 through 21 who...

2014-07-01

421

34 CFR 300.703 - Allocations to States.  

Code of Federal Regulations, 2010 CFR

...this section for a fiscal year is equal to or greater...for the preceding fiscal year, those allocations are...provided in paragraph (c)(2) of this section, the...allocates for the fiscal year (A) To each State...populations of children aged 3 through 21 who...

2010-07-01

422

34 CFR 300.703 - Allocations to States.  

Code of Federal Regulations, 2011 CFR

...this section for a fiscal year is equal to or greater...for the preceding fiscal year, those allocations are...provided in paragraph (c)(2) of this section, the...allocates for the fiscal year (A) To each State...populations of children aged 3 through 21 who...

2011-07-01

423

34 CFR 300.703 - Allocations to States.  

Code of Federal Regulations, 2013 CFR

...this section for a fiscal year is equal to or greater...for the preceding fiscal year, those allocations are...provided in paragraph (c)(2) of this section, the...allocates for the fiscal year (A) To each State...populations of children aged 3 through 21 who...

2013-07-01

424

Mitigating market power in financial transmission-right allocations  

Microsoft Academic Search

A methodology is proposed for taking into account potential market power in financial transmission-right (FTR) allocations. Hedging position ratios (HPRs) are computed for every FTR bid. These ratios quantify the relationship between the positions of a FTR bidder in the energy market, and in the transmission rights allocation (based on the transmission rights bids). These ratios are used to identify

Guillermo Bautista; Victor H. Quintana

2003-01-01

425

A novel framework of register allocation for software pipelining  

Microsoft Academic Search

Although software pipelining has been proposed as one of the most important loop scheduling methods, simultaneous scheduling and register allocation is less understood and remains an open problem [28]. The objective of this paper is to develop a unified algorithmic framework for concurrent scheduling and register allocation to support time-optimal software pipelining. A key intuition leading to this surprisingly simple

Qi Ning; Guang R. Gao

1993-01-01

426

Optimal allocation of resources in distributed information networks  

Microsoft Academic Search

The problems of file allocation and capacity assignment in a fixed topology distributed computer network are examined. These two aspects of the design are tightly coupled by means of an average message delay constraint. The objective is to allocate copies of information files to network nodes and capacities to network links so that a minimum cost is achieved subject to

Samy A. Mahmoud; J. Spruce Riordon

1976-01-01

427

Optimal allocation of resources in distributed information networks  

Microsoft Academic Search

The problems of file allocation and capacity assignment in a fixed topology distributed computer network are examined. These two aspects of the design are tightly coupled through an average message delay constraint. The objective is to allocate copies of information files to network nodes and capacities to network links so that a minimum cost is achieved subject to network delay

Samy A. Mahmoud; J. Spruce Riordon

1975-01-01

428

Efficiency of Fiscal Allocations in Site-Based Empowered Schools  

ERIC Educational Resources Information Center

This study implemented a two phase concurrent mixed-methods design to generate a greater understanding of how elementary schools with increased autonomy in fiscal decision making allocated their money, how their site-based decisions affected allocative efficiency, and how increased autonomy affected site-based decision making when compared with a

Meyer, Jerome Jay

2011-01-01

429

Methods for Allocating Urban Emergency Units: A Survey  

Microsoft Academic Search

An urban emergency service system provides mobile units (vehicles) to respond to requests for service which can occur at any time and any place throughout a city. This paper describes the common characteristics and operational problems of these systems and surveys the various methods, both traditional and recently developed, which may be used for allocating their units. Aspects of allocation

Jan M. Chaiken; Richard C. Larson

1972-01-01

430

Optimal control allocation in vehicle dynamics control for rollover mitigation  

Microsoft Academic Search

Vehicle dynamics control systems, previously only intended for yaw stabilization, are now being extended to incorporate rollover mitigation via braking. Current systems typically use a heuristic approach to control allocation, often utilizing only a subset of the available actuators. In this article a computationally-efficient, optimization-based control allocation strategy is used to map controller commands to braking forces on all four

Brad Schofield; T. Hagglund

2008-01-01

431

What Does it Really Cost? Allocating Indirect Costs.  

ERIC Educational Resources Information Center

Better managerial control in terms of decision making and understanding the costs of a system/service result from allocating indirect costs. Allocation requires a three-step process: selecting cost objectives, pooling related overhead costs, and selecting costs bases to connect the objectives to the pooled costs. Argues that activity-based costing

Snyder, Herbert; Davenport, Elisabeth

1997-01-01

432

Distributed Channel Allocation Protocols for Wireless Sensor Networks  

E-print Network

1 Distributed Channel Allocation Protocols for Wireless Sensor Networks Abusayeed Saifullah, You Xu performance degradation in wireless sensor networks (WSNs). While multiple channels available in WSN technology such as IEEE 802.15.4 can be exploited to mitigate interference, channel allocation can have

Lu, Chenyang

433

Petroleum allocation at PETROBRAS: Mathematical model and a solution algorithm  

Microsoft Academic Search

Petroleum Allocation is an important link for the i ntegration of Petroleum Supply Chain at PETROBRAS as it is responsible for refining the str ategic supply planning information to be used at th e operation levels. In this work we describe how math ematical programming is being used to solve the Petroleum Allocation Problem and we show the effectiveness of

Roger Rocha; Ignacio E. Grossmann

2009-01-01

434

Performance evaluation of resource allocation policies for energy harvesting devices  

Microsoft Academic Search

We focus on resource allocation for energy harvest- ing devices. We analytically and numerically evaluate the perfor- mance of algorithms that determine time fair energy allocation in systems withpredictableandstochasticenergy inputs. To gain insight into the performance of networks of devices, we obtain results for the simple cases of a single node and a link. Due to the need for low

Maria Gorlatova; Andrey Bernstein; Gil Zussman

2011-01-01

435

Allowance Allocation and Effects on the Electricity Sector  

E-print Network

Allowance Allocation and Effects on the Electricity Sector Karen Palmer Resources for the Future of Earthweek #12;Allocation and Electricity · Prior cap-and-trade programs grandfather (GF) allowances on electricity markets depends on CO2 emissions rates · Different regional effect of GF on electricity markets

436

DEVELOPMENT AND IMPROVEMENT OF TEMPORAL ALLOCATION FACTOR FILES  

EPA Science Inventory

The report gives results of a project to: (1) evaluate the quality and completeness of data and methods being used for temporal allocation of emissions data, (2) identify and prioritize needed improvements to current methods for developing temporal allocation factors (TAFs), and ...

437

GENERATING SOPHISTICATED SPATIAL SURROGATES USING THE MIMS SPATIAL ALLOCATOR  

EPA Science Inventory

The Multimedia Integrated Modeling System (MIMS) Spatial Allocator is open-source software for generating spatial surrogates for emissions modeling, changing the map projection of Shapefiles, and performing other types of spatial allocation that does not require the use of a comm...

438

APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY Appl. Stochastic Models Bus. Ind., 2005; 21:111136  

E-print Network

APPLIED STOCHASTIC MODELS IN BUSINESS AND INDUSTRY Appl. Stochastic Models Bus. Ind., 2005; 21 a feature space. To summarize, there are three benefits to transform the data into H 1. It lets us define

439

50 CFR 80.64 - How does an agency allocate costs in multipurpose projects and facilities?  

Code of Federal Regulations, 2012 CFR

...does an agency allocate costs in multipurpose projects and facilities? 80...does an agency allocate costs in multipurpose projects and facilities? A...wildlife agency must allocate costs in multipurpose projects based on the uses...

2012-10-01

440

50 CFR 80.64 - How does an agency allocate costs in multipurpose projects and facilities?  

Code of Federal Regulations, 2013 CFR

...does an agency allocate costs in multipurpose projects and facilities? 80...does an agency allocate costs in multipurpose projects and facilities? A...wildlife agency must allocate costs in multipurpose projects based on the uses...

2013-10-01

441

50 CFR 80.64 - How does an agency allocate costs in multipurpose projects and facilities?  

Code of Federal Regulations, 2011 CFR

...does an agency allocate costs in multipurpose projects and facilities? 80...does an agency allocate costs in multipurpose projects and facilities? A...wildlife agency must allocate costs in multipurpose projects based on the uses...

2011-10-01

442

50 CFR 80.64 - How does an agency allocate costs in multipurpose projects and facilities?  

Code of Federal Regulations, 2014 CFR

...does an agency allocate costs in multipurpose projects and facilities? 80...does an agency allocate costs in multipurpose projects and facilities? A...wildlife agency must allocate costs in multipurpose projects based on the uses...

2014-10-01

443

WORKING PAPER N 2013 39 Heterogeneous Banking Efficiency : Allocative Distortions and  

E-print Network

WORKING PAPER N° 2013 ­ 39 Heterogeneous Banking Efficiency : Allocative Distortions and Lending, Adverse selection, Endogenous market segmentation, Allocation efficiency, Lending cycle PARIS AGRONOMIQUE halshs-00908941,version1-25Nov2013 #12;Heterogeneous Banking Efficiency : Allocative Distortions

Boyer, Edmond

444

26 CFR 1.755-1 - Rules for allocation of basis.  

Code of Federal Regulations, 2014 CFR

...TAXES (CONTINUED) Provisions Common to Part II, Subchapter K...sections 743(b) and 734(b) among partnership property. If...basis adjustment is allocated among the partnership's...allocated to each class is allocated among the items within the...

2014-04-01

445

26 CFR 1.755-1 - Rules for allocation of basis.  

Code of Federal Regulations, 2013 CFR

...TAXES (CONTINUED) Provisions Common to Part II, Subchapter K...sections 743(b) and 734(b) among partnership property. If...basis adjustment is allocated among the partnership's...allocated to each class is allocated among the items within the...

2013-04-01

446

26 CFR 1.755-1 - Rules for allocation of basis.  

Code of Federal Regulations, 2012 CFR

...TAXES (CONTINUED) Provisions Common to Part II, Subchapter K...sections 743(b) and 734(b) among partnership property. If...basis adjustment is allocated among the partnership's...allocated to each class is allocated among the items within the...

2012-04-01

447

26 CFR 1.755-1 - Rules for allocation of basis.  

Code of Federal Regulations, 2011 CFR

...TAXES (CONTINUED) Provisions Common to Part II, Subchapter K...sections 743(b) and 734(b) among partnership property. If...basis adjustment is allocated among the partnership's...allocated to each class is allocated among the items within the...

2011-04-01

448

26 CFR 1.755-1 - Rules for allocation of basis.  

Code of Federal Regulations, 2010 CFR

... INCOME TAXES Provisions Common to Part II, Subchapter K...sections 743(b) and 734(b) among partnership property. If...basis adjustment is allocated among the partnership's...allocated to each class is allocated among the items within the...

2010-04-01

449

7 CFR 1435.317 - Revisions of allocations and proportionate shares.  

Code of Federal Regulations, 2010 CFR

...Revisions of allocations and proportionate shares. The Executive Vice President, CCC...allocation or any producer's proportionate share on the same basis as the initial allocation or proportionate share was required to be...

2010-01-01

450

48 CFR 952.211-71 - Priorities and allocations for energy programs (contracts).  

Code of Federal Regulations, 2010 CFR

...Priorities and allocations for energy programs (contracts...Acquisition Regulations System DEPARTMENT OF ENERGY CLAUSES AND FORMS...Allocations (Atomic Energy) (APR 2008) The...Priorities and Allocations System (DPAS)...

2010-10-01

451

40 CFR 97.341 - Timing requirements for CAIR NOX Ozone Season allowance allocations.  

Code of Federal Regulations, 2013 CFR

...false Timing requirements for CAIR NOX Ozone Season allowance allocations. 97.341...NOX AND SO2 TRADING PROGRAMS CAIR NOX Ozone Season Allowance Allocations 97.341 Timing requirements for CAIR NOX Ozone Season allowance allocations....

2013-07-01

452

40 CFR 97.341 - Timing requirements for CAIR NOX Ozone Season allowance allocations.  

Code of Federal Regulations, 2012 CFR

...false Timing requirements for CAIR NOX Ozone Season allowance allocations. 97.341...NOX AND SO2 TRADING PROGRAMS CAIR NOX Ozone Season Allowance Allocations 97.341 Timing requirements for CAIR NOX Ozone Season allowance allocations....

2012-07-01

453

40 CFR 97.341 - Timing requirements for CAIR NOX Ozone Season allowance allocations.  

Code of Federal Regulations, 2011 CFR

...false Timing requirements for CAIR NOX Ozone Season allowance allocations. 97.341...NOX AND SO2 TRADING PROGRAMS CAIR NOX Ozone Season Allowance Allocations 97.341 Timing requirements for CAIR NOX Ozone Season allowance allocations....

2011-07-01

454

40 CFR 96.341 - Timing requirements for CAIR NOX Ozone Season allowance allocations.  

Code of Federal Regulations, 2012 CFR

...false Timing requirements for CAIR NOX Ozone Season allowance allocations. 96.341...FOR STATE IMPLEMENTATION PLANS CAIR NOX Ozone Season Allowance Allocations 96.341 Timing requirements for CAIR NOX Ozone Season allowance allocations....

2012-07-01

455

40 CFR 96.341 - Timing requirements for CAIR NOX Ozone Season allowance allocations.  

Code of Federal Regulations, 2013 CFR

...false Timing requirements for CAIR NOX Ozone Season allowance allocations. 96.341...FOR STATE IMPLEMENTATION PLANS CAIR NOX Ozone Season Allowance Allocations 96.341 Timing requirements for CAIR NOX Ozone Season allowance allocations....

2013-07-01

456

40 CFR 96.341 - Timing requirements for CAIR NOX Ozone Season allowance allocations.  

Code of Federal Regulations, 2011 CFR

...false Timing requirements for CAIR NOX Ozone Season allowance allocations. 96.341...FOR STATE IMPLEMENTATION PLANS CAIR NOX Ozone Season Allowance Allocations 96.341 Timing requirements for CAIR NOX Ozone Season allowance allocations....

2011-07-01

457

40 CFR 96.341 - Timing requirements for CAIR NOX Ozone Season allowance allocations.  

Code of Federal Regulations, 2010 CFR

...false Timing requirements for CAIR NOX Ozone Season allowance allocations. 96.341...FOR STATE IMPLEMENTATION PLANS CAIR NOX Ozone Season Allowance Allocations 96.341 Timing requirements for CAIR NOX Ozone Season allowance allocations....

2010-07-01

458

40 CFR 97.341 - Timing requirements for CAIR NOX Ozone Season allowance allocations.  

Code of Federal Regulations, 2010 CFR

...false Timing requirements for CAIR NOX Ozone Season allowance allocations. 97.341...NOX AND SO2 TRADING PROGRAMS CAIR NOX Ozone Season Allowance Allocations 97.341 Timing requirements for CAIR NOX Ozone Season allowance allocations....

2010-07-01

459

48 CFR 52.211-15 - Defense Priority and Allocation Requirements.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Defense Priority and Allocation Requirements...Provisions and Clauses 52.211-15 Defense Priority and Allocation Requirements...b), insert the following clause: Defense Priority and Allocation...

2012-10-01

460

48 CFR 52.211-15 - Defense Priority and Allocation Requirements.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Defense Priority and Allocation Requirements...Provisions and Clauses 52.211-15 Defense Priority and Allocation Requirements...b), insert the following clause: Defense Priority and Allocation...

2011-10-01

461

48 CFR 52.211-15 - Defense Priority and Allocation Requirements.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Defense Priority and Allocation Requirements...Provisions and Clauses 52.211-15 Defense Priority and Allocation Requirements...b), insert the following clause: Defense Priority and Allocation...

2010-10-01

462

25 CFR 39.732 - How does OIEP allocate transportation funds to schools?  

Code of Federal Regulations, 2012 CFR

...does OIEP allocate transportation funds to schools? 39.732 Section 39.732 Indians...THE INTERIOR EDUCATION THE INDIAN SCHOOL EQUALIZATION PROGRAM Student Transportation...does OIEP allocate transportation funds to schools? OIEP allocates transportation...

2012-04-01

463

Portfolio optimization in stochastic markets  

Microsoft Academic Search

We consider a multiperiod mean-variance model where the model parameters change according to a stochastic market. The mean\\u000a vector and covariance matrix of the random returns of risky assets all depend on the state of the market during any period\\u000a where the market process is assumed to follow a Markov chain. Dynamic programming is used to solve an auxiliary problem

U. akmak; S. zekici

2006-01-01

464

Note on New Massive Gravity in $AdS_3$  

E-print Network

In this note we study the properties of linearized gravitational excitations in the new massive gravity theory in asymptotically $AdS_3$ spacetime and find that there is also a critical point for the mass parameter at which massive gravitons become massless as in topological massive gravity in $AdS_3$. However, at this critical point in the new massive gravity the energy of all branches of highest weight gravitons vanish and the central charges also vanish within the Brown-Henneaux boundary conditions. The new massive gravity in asymptotically $AdS_3$ spacetime seems to be trivial at this critical point under the Brown-Henneaux boundary conditions if the Brown-Henneaux boundary conditions can be consistent with this theory. At this point, the boundary conditions of log gravity may be preferred.

Yan Liu; Ya-Wen Sun

2009-03-03

465

New massive gravity and AdS(4) counterterms.  

PubMed

We show that the recently proposed Dirac-Born-Infeld extension of new massive gravity emerges naturally as a counterterm in four-dimensional anti-de Sitter space (AdS(4)). The resulting on-shell Euclidean action is independent of the cutoff at zero temperature. We also find that the same choice of counterterm gives the usual area law for the AdS(4) Schwarzschild black hole entropy in a cutoff-independent manner. The parameter values of the resulting counterterm action correspond to a c=0 theory in the context of the duality between AdS(3) gravity and two-dimensional conformal field theory. We rewrite this theory in terms of the gauge field that is used to recast 3D gravity as a Chern-Simons theory. PMID:21635026

Jatkar, Dileep P; Sinha, Aninda

2011-04-29

466

All AdS_7 solutions of type II supergravity  

E-print Network

In M-theory, the only AdS_7 supersymmetric solutions are AdS_7 x S^4 and its orbifolds. In this paper, we find and classify new supersymmetric solutions of the type AdS_7 x M_3 in type II supergravity. While in IIB none exist, in IIA with Romans mass (which does not lift to M-theory) there are many new ones. We use a pure spinor approach reminiscent of generalized complex geometry. Without the need for any Ansatz, the system determines uniquely the form of the metric and fluxes, up to solving a system of ODEs. Namely, the metric on M_3 is that of an S^2 fibered over an interval; this is consistent with the Sp(1) R-symmetry of the holographically dual (1,0) theory. By including D8 brane sources, one can numerically obtain regular solutions, where topologically M_3 = S^3.

Fabio Apruzzi; Marco Fazzi; Dario Rosa; Alessandro Tomasiello

2014-02-22

467

Logarithmic AdS Waves and Zwei-Dreibein Gravity  

E-print Network

We show that the parameter space of Zwei-Dreibein Gravity (ZDG) in AdS3 exhibits critical points, where massive graviton modes coincide with pure gauge modes and new `logarithmic' modes appear, similar to what happens in New Massive Gravity. The existence of critical points is shown both at the linearized level, as well as by finding AdS wave solutions of the full non-linear theory, that behave as logarithmic modes towards the AdS boundary. In order to find these solutions explicitly, we give a reformulation of ZDG in terms of a single Dreibein, that involves an infinite number of derivatives. At the critical points, ZDG can be conjectured to be dual to a logarithmic conformal field theory with zero central charges, characterized by new anomalies whose conjectured values are calculated.

Eric A. Bergshoeff; Andrs F. Goya; Wout Merbis; Jan Rosseel

2014-01-21

468

Stochastic modeling of transient contaminant transport  

NASA Astrophysics Data System (ADS)

A stochastic perturbation-based formulation for transient contaminant transport in the vadose zone was developed and implemented. The proposed methodology provides an efficient way to incorporate the small-scale variability of soil properties into large-scale models using effective parameters. A finite element solution of the stochastic differential equation for transient contaminant transport was formulated. The mean concentration value and its variance at each node were evaluated. The advantage of the proposed stochastic finite element approach is that only a few soil parameters are required to describe the variability of its stochastic properties. In addition, the proposed approach is neither site-specific nor contaminant-specific. A one-dimensional transient contaminant transport was simulated and the stochastic results were compared to deterministic and experimental results. The stochastic perturbation-based numerical formulation predicted the velocity of spreading of the contaminant much closer to the experimental measurements, as compared to the deterministic approach.

Aguirre, Christiana G.; Haghighi, Kamyar

2003-05-01

469

S4HARA: System for HIV/AIDS resource allocation  

PubMed Central

Background HIV/AIDS resource allocation decisions are influenced by political, social, ethical and other factors that are difficult to quantify. Consequently, quantitative models of HIV/AIDS resource allocation have had limited impact on actual spending decisions. We propose a decision-support System for HIV/AIDS Resource Allocation (S4HARA) that takes into consideration both principles of efficient resource allocation and the role of non-quantifiable influences on the decision-making process for resource allocation. Methods S4HARA is a four-step spreadsheet-based model. The first step serves to identify the factors currently influencing HIV/AIDS allocation decisions. The second step consists of prioritizing HIV/AIDS interventions. The third step involves allocating the budget to the HIV/AIDS interventions using a rational approach. Decision-makers can select from several rational models of resource allocation depending on availability of data and level of complexity. The last step combines the results of the first and third steps to highlight the influencing factors that act as barriers or facilitators to the results suggested by the rational resource allocation approach. Actionable recommendations are then made to improve the allocation. We illustrate S4HARA in the context of a primary healthcare clinic in South Africa. Results The clinic offers six types of HIV/AIDS interventions and spends US$750,000 annually on these programs. Current allocation decisions are influenced by donors, NGOs and the government as well as by ethical and religious factors. Without additional funding, an optimal allocation of the total budget suggests that the portion allotted to condom distribution be increased from 1% to 15% and the portion allotted to prevention and treatment of opportunistic infections be increased from 43% to 71%, while allocation to other interventions should decrease. Conclusion Condom uptake at the clinic should be increased by changing the condom distribution policy from a pull system to a push system. NGOs and donors promoting antiretroviral programs at the clinic should be sensitized to the results of the model and urged to invest in wellness programs aimed at the prevention and treatment of opportunistic infections. S4HARA differentiates itself from other decision support tools by providing rational HIV/AIDS resource allocation capabilities as well as consideration of the realities facing authorities in their decision-making process. PMID:18366800

Lasry, Arielle; Carter, Michael W; Zaric, Gregory S

2008-01-01

470

Deterministic and stochastic bifurcations in the Hindmarsh-Rose neuronal model.  

PubMed

We analyze the bifurcations occurring in the 3D Hindmarsh-Rose neuronal model with and without random signal. When under a sufficient stimulus, the neuron activity takes place; we observe various types of bifurcations that lead to chaotic transitions. Beside the equilibrium solutions and their stability, we also investigate the deterministic bifurcation. It appears that the neuronal activity consists of chaotic transitions between two periodic phases called bursting and spiking solutions. The stochastic bifurcation, defined as a sudden change in character of a stochastic attractor when the bifurcation parameter of the system passes through a critical value, or under certain condition as the collision of a stochastic attractor with a stochastic saddle, occurs when a random Gaussian signal is added. Our study reveals two kinds of stochastic bifurcation: the phenomenological bifurcation (P-bifurcations) and the dynamical bifurcation (D-bifurcations). The asymptotical method is used to analyze phenomenological bifurcation. We find that the neuronal activity of spiking and bursting chaos remains for finite values of the noise intensity. PMID:24089961

Dtchetgnia Djeundam, S R; Yamapi, R; Kofane, T C; Aziz-Alaoui, M A

2013-09-01

471

Information Anatomy of Stochastic Equilibria  

E-print Network

A stochastic nonlinear dynamical system generates information, as measured by its entropy rate. Some---the ephemeral information---is dissipated and some---the bound information---is actively stored and so affects future behavior. We derive analytic expressions for the ephemeral and bound informations in the limit of small-time discretization for two classical systems that exhibit dynamical equilibria: first-order Langevin equations (i) where the drift is the gradient of a potential function and the diffusion matrix is invertible and (ii) with a linear drift term (Ornstein-Uhlenbeck) but a noninvertible diffusion matrix. In both cases, the bound information is sensitive only to the drift, while the ephemeral information is sensitive only to the diffusion matrix and not to the drift. Notably, this information anatomy changes discontinuously as any of the diffusion coefficients vanishes, indicating that it is very sensitive to the noise structure. We then calculate the information anatomy of the stochastic cusp catastrophe and of particles diffusing in a heat bath in the overdamped limit, both examples of stochastic gradient descent on a potential landscape. Finally, we use our methods to calculate and compare approximations for the so-called time-local predictive information for adaptive agents.

Sarah Marzen; James P. Crutchfield

2014-03-16

472

Information Anatomy of Stochastic Equilibria  

NASA Astrophysics Data System (ADS)

A stochastic nonlinear dynamical system generates information, as measured by its entropy rate. Some---the ephemeral information---is dissipated and some---the bound information---is actively stored and so affects future behavior. We derive analytic expressions for the ephemeral and bound informations in the limit of small-time discretization for two classical systems that exhibit dynamical equilibria: first-order Langevin equations (i) where the drift is the gradient of a potential function and the diffusion matrix is invertible and (ii) with a linear drift term (Ornstein-Uhlenbeck) but a noninvertible diffusion matrix. In both cases, the bound information is sensitive only to the drift, while the ephemeral information is sensitive only to the diffusion matrix and not to the drift. Notably, this information anatomy changes discontinuously as any of the diffusion coefficients vanishes, indicating that it is very sensitive to the noise structure. We then calculate the information anatomy of the stochastic cusp catastrophe and of particles diffusing in a heat bath in the overdamped limit, both examples of stochastic gradient descent on a potential landscape. Finally, we use our methods to calculate and compare approximations for the so-called time-local predictive information for adaptive agents.

Marzen, Sarah; Crutchfield, James

2014-08-01

473

Stochastic resonance in binocular rivalry.  

PubMed

When a different image is presented to each eye, visual awareness spontaneously alternates between the two images--a phenomenon called binocular rivalry. Because binocular rivalry is characterized by two marginally stable perceptual states and spontaneous, apparently stochastic, switching between them, it has been speculated that switches in perceptual awareness reflect a double-well-potential type computational architecture coupled with noise. To characterize this noise-mediated mechanism, we investigated whether stimulus input, neural adaptation, and inhibitory modulations (thought to underlie perceptual switches) interacted with noise in such a way that the system produced stochastic resonance. By subjecting binocular rivalry to weak periodic contrast modulations spanning a range of frequencies, we demonstrated quantitative evidence of stochastic resonance in binocular rivalry. Our behavioral results combined with computational simulations provided insights into the nature of the internal noise (its magnitude, locus, and calibration) that is relevant to perceptual switching, as well as provided novel dynamic constraints on computational models designed to capture the neural mechanisms underlying perceptual switching. PMID:16183099

Kim, Yee-Joon; Grabowecky, Marcia; Suzuki, Satoru

2006-02-01

474

Nonlinear and Stochastic Morphological Segregation  

E-print Network

I perform a joint counts-in-cells analysis of galaxies of different spectral types using the Las Campanas Redshift Survey (LCRS). Using a maximum-likelihood technique to fit for the relationship between the density fields of early- and late-type galaxies, I find a relative linear bias of $b=0.76\\pm 0.02$. This technique can probe the nonlinearity and stochasticity of the relationship as well. However, the degree to which nonlinear and stochastic fits improve upon the linear fit turns out to depend on the redshift range in question. In particular, there seems to be a systematic difference between the high- and low-redshift halves of the data (respectively, further than and closer than $cz\\approx 36,000$ km/s); all of the signal of stochasticity and nonlinearity comes from the low-redshift portion. Analysis of mock catalogs shows that the peculiar geometry and variable flux limits of the LCRS do not cause this effect. I speculate that the central surface brightness selection criteria of the LCRS may be responsible.

Michael Blanton

1999-08-31

475

Dynamic task allocation for a man-machine symbiotic system  

NASA Technical Reports Server (NTRS)

This report presents a methodological approach to the dynamic allocation of tasks in a man-machine symbiotic system in the context of dexterous manipulation and teleoperation. This report addresses a symbiotic system containing two symbiotic partners which work toward controlling a single manipulator arm for the execution of a series of sequential manipulation tasks. It is proposed that an automated task allocator use knowledge about the constraints/criteria of the problem, the available resources, the tasks to be performed, and the environment to dynamically allocate task recommendations for the man and the machine. The presentation of the methodology includes discussions concerning the interaction of the knowledge areas, the flow of control, the necessary communication links, and the replanning of the task allocation. Examples of task allocation are presented to illustrate the results of this methodolgy.

Parker, L. E.; Pin, F. G.

1987-01-01

476

Robust Inversion and Data Compression in Control Allocation  

NASA Technical Reports Server (NTRS)

We present an off-line computational method for control allocation design. The control allocation function delta = F(z)tau = delta (sub 0) (z) mapping commanded body-frame torques to actuator commands is implicitly specified by trim condition delta (sub 0) (z) and by a robust pseudo-inverse problem double vertical line I - G(z) F(z) double vertical line less than epsilon (z) where G(z) is a system Jacobian evaluated at operating point z, z circumflex is an estimate of z, and epsilon (z) less than 1 is a specified error tolerance. The allocation function F(z) = sigma (sub i) psi (z) F (sub i) is computed using a heuristic technique for selecting wavelet basis functions psi and a constrained least-squares criterion for selecting the allocation matrices F (sub i). The method is applied to entry trajectory control allocation for a reusable launch vehicle (X-33).

Hodel, A. Scottedward

2000-01-01

477

Adaptive Control Allocation in the Presence of Actuator Failures  

NASA Technical Reports Server (NTRS)

In this paper, a novel adaptive control allocation framework is proposed. In the adaptive control allocation structure, cooperative actuators are grouped and treated as an equivalent control effector. A state feedback adaptive control signal is designed for the equivalent effector and allocated to the member actuators adaptively. Two adaptive control allocation algorithms are proposed, which guarantee closed-loop stability and asymptotic state tracking in the presence of uncertain loss of effectiveness and constant-magnitude actuator failures. The proposed algorithms can be shown to reduce the controller complexity with proper grouping of the actuators. The proposed adaptive control allocation schemes are applied to two linearized aircraft models, and the simulation results demonstrate the performance of the proposed algorithms.

Liu, Yu; Crespo, Luis G.

2010-01-01

478

On the Generalized Massive Gravity in $AdS_3$  

Microsoft Academic Search

In this note we investigate the generalized massive gravity in asymptotically\\u000a$AdS_3$ spacetime by combining the two mass terms of topological massive\\u000agravity and new massive gravity theory. We study the linearized excitations\\u000aaround the $AdS_3$ background and find that at a specific value of a certain\\u000acombination of the two mass parameters (chiral line), one of the massive\\u000agraviton

Yan Liu; Ya-Wen Sun

2009-01-01

479

Comments on String Theory on $AdS_3$  

Microsoft Academic Search

We study string propagation on $AdS_3$ times a compact space from an ``old fashioned'' worldsheet point of view of perturbative string theory. We derive the spacetime CFT and its Virasoro and current algebras, thus establishing the conjectured $AdS$\\/CFT correspondence for this case in the full string theory. Our results have implications for the extreme IR limit of the $D1-D5$ system,

Amit Giveon; David Kutasov; Nathan Seiberg

1998-01-01

480

Stability of impulsive stochastic differential delay systems and its application to impulsive stochastic neural networks  

Microsoft Academic Search

This paper is concerned with the stability of n-dimensional stochastic differential delay systems with nonlinear impulsive effects. First, the equivalent relation between the solution of the n-dimensional stochastic differential delay system with nonlinear impulsive effects and that of a corresponding n-dimensional stochastic differential delay system without impulsive effects is established. Then, some stability criteria for the n-dimensional stochastic differential delay

Chunxiang Li; Junping Shi; Jitao Sun

2011-01-01

481

Mixed-symmetry fields in AdS(5), conformal fields, and AdS/CFT  

E-print Network

Mixed-symmetry arbitrary spin massive, massless, and self-dual massive fields in AdS(5) are studied. Light-cone gauge actions for such fields leading to decoupled equations of motion are constructed. Light-cone gauge formulation of mixed-symmetry anomalous conformal currents and shadows in 4d flat space is also developed. AdS/CFT correspondence for normalizable and non-normalizable modes of mixed-symmetry AdS fields and the respective boundary mixed-symmetry anomalous conformal currents and shadows is studied. We demonstrate that the light-cone gauge action for massive mixed-symmetry AdS field evaluated on solution of the Dirichlet problem amounts to the light-cone gauge 2-point vertex of mixed-symmetry anomalous shadow. Also we show that UV divergence of the action for mixed-symmetry massive AdS field with some particular value of mass parameter evaluated on the Dirichlet problem amounts to the action of long mixed-symmetry conformal field, while UV divergence of the action for mixed-symmetry massless AdS field evaluated on the Dirichlet problem amounts to the action of short mixed-symmetry conformal field. We speculate on string theory interpretation of a model which involves short low-spin conformal fields and long higher-spin conformal fields.

R. R. Metsaev

2014-10-27

482

Compact AdS space, Brane geometry and the AdS/CFT correspondence  

E-print Network

The AdS/CFT correspondence can be realized in spaces that are globally different but share the same asymptotic behavior. Two known cases are: a compact AdS space and the space generated by a large number of coincident branes. We discuss the physical consistency, in the sense of the Cauchy problem, of these two formulations. We show that the role of the boundary in the compact AdS space is equivalent to that of the flat asymptotic region in the brane space. We also show, by introducing a second coordinate chart for the pure AdS space, that a point at its spatial infinity corresponds to a horizon in the brane system.

Henrique Boschi-Filho; Nelson R. F. Braga

2001-12-20

483

Stochastic Processes Applied to Line Shapes  

NASA Astrophysics Data System (ADS)

We present approaches using stochastic processes for the calculation of line broadening in plasmas. The derivation of model microfield methods (MMM) based on analytic formulations is recalled, as well as an approach using a simulation of the stochastic process. We discuss the possibility of an improvement of the stochastic process by comparing our first results to ab initio particle simulations coupled to a numerical integration of the emitters Schrdinger equation.

Stamm, R.; Boland, D.; Hammami, R.; Capes, H.; Catoire, F.; Koubiti, M.; Mekkaoui, A.; Marandet, Y.; Rosato, J.; Godbert-Mouret, L.; Christova, M.

484

Stochastic resonance in free-electron lasers.  

PubMed

We present evidence of stochastic resonance in free-electron lasers. In order to do that, we have analyzed theoretically the dynamics of a free-electron laser oscillator. A weak modulation and a noise source have been applied to the initial energy of the electron beam. We have found stochastic resonance for different frequencies and amplitudes of the modulation. A threshold crossing mechanism leads to the stochastic resonance in this system. PMID:11304371

Caldern, O G

2001-01-01

485

Inverse problems for stochastic transport equations  

NASA Astrophysics Data System (ADS)

Inverse problems for stochastic linear transport equations driven by a temporal or spatial white noise are discussed. We analyse stochastic linear transport equations which depend on an unknown potential and have either additive noise or multiplicative noise. We show that one can approximate the potential with arbitrary small error when the solution of the stochastic linear transport equation is observed over time at some fixed point in the state space.

Crisan, Dan; Otobe, Yoshiki; Peszat, Szymon

2015-01-01

486

The robustness of stochastic switching networks  

Microsoft Academic Search

Many natural systems, including chemical and biological systems, can be modeled using stochastic switching circuits. These circuits consist of stochastic switches, called pswitches, which operate with a fixed probability of being open or closed. We study the effect caused by introducing an error of size. to each pswitch in a stochastic circuit. We analyze two constructions.simple series-parallel and general series-parallel

Po-Ling Loh; Hongchao Zhou; Jehoshua Bruck

2009-01-01

487

Distributed processor allocation for launching applications in a massively connected processors complex  

DOEpatents

A compute processor allocator architecture for allocating compute processors to run applications in a multiple processor computing apparatus is distributed among a subset of processors within the computing apparatus. Each processor of the subset includes a compute processor allocator. The compute processor allocators can share a common database of information pertinent to compute processor allocation. A communication path permits retrieval of information from the database independently of the compute processor allocators.

Pedretti, Kevin (Goleta, CA)

2008-11-18

488

Phytoplankton strategies for photosynthetic energy allocation.  

PubMed

Phytoplankton physiology is dynamic and highly responsive to the environment. Phytoplankton acclimate to changing environmental conditions by a complex reallocation of carbon and energy through metabolic pathways to optimize growth. Considering the tremendous diversity of phytoplankton, it is not surprising that different phytoplankton taxa use different strategies to partition carbon and energy resources. It has therefore been satisfying to discover that general principles of energetic stoichiometry appear to govern these complex processes and can be broadly applied to interpret phytoplankton distributions, productivity, and food web dynamics. The expectation of future changes in aquatic environments brought on by climate change warrants gathering knowledge about underlying patterns of photosynthetic energy allocation and their impacts on community structure and ecosystem productivity. PMID:25149563

Halsey, Kimberly H; Jones, Bethan M

2015-01-01

489

Impaired effort allocation in patients with schizophrenia.  

PubMed

A hallmark of negative symptoms in schizophrenia is reduced motivation and goal directed behavior. While preclinical models suggest that blunted striatal dopamine levels can produce such reductions, this mechanism is inconsistent with evidence for enhanced striatal dopamine levels in schizophrenia. In seeking to reconcile this discrepancy, one possibility is that negative symptoms reflect a failure of striatal motivational systems to mobilize appropriately in response to reward-related information. In the present study, we used a laboratory effort-based decision-making task in a sample of patients with schizophrenia and healthy controls to examine allocation of effort in exchange for varying levels of monetary reward. We found that patients and controls did not differ in the overall amount of effort expenditure, but patients made significantly less optimal choices in terms of maximizing rewards. These results provide further evidence for a selective deficit in the ability of schizophrenia patients to utilize environmental cues to guide reward-seeking behavior. PMID:25487699

Treadway, Michael T; Peterman, Joel S; Zald, David H; Park, Sohee

2015-02-01

490

Optimal Power Allocation for Renewable Energy Source  

E-print Network

Battery powered transmitters face energy constraint, replenishing their energy by a renewable energy source (like solar or wind power) can lead to longer lifetime. We consider here the problem of finding the optimal power allocation under random channel conditions for a wireless transmitter, such that rate of information transfer is maximized. Here a rechargeable battery, which is periodically charged by renewable source, is used to power the transmitter. All of above is formulated as a Markov Decision Process. Structural properties like the monotonicity of the optimal value and policy derived in this paper will be of vital importance in understanding the kind of algorithms and approximations needed in real-life scenarios. The effect of curse of dimensionality which is prevalent in Dynamic programming problems can thus be reduced. We show our results under the most general of assumptions.

Sinha, Abhinav

2011-01-01

491

Optimal load allocation of multiple fuel boilers.  

PubMed

This paper presents a new methodology for optimally allocating a set of multiple industrial boilers that each simultaneously consumes multiple fuel types. Unlike recent similar approaches in the utility industry that use soft computing techniques, this approach is based on a second-order gradient search method that is easy to implement without any specialized optimization software. The algorithm converges rapidly and the application yields significant savings benefits, up to 3% of the overall operating cost of industrial boiler systems in the examples given and potentially higher in other cases, depending on the plant circumstances. Given today's energy prices, this can yield significant savings benefits to manufacturers that raise steam for plant operations. PMID:19046585

Dunn, Alex C; Du, Yan Yi

2009-04-01

492

Intelligent initialization of resource allocating RBF networks.  

PubMed

In any neural network system, proper parameter initialization reduces training time and effort, and generally leads to compact modeling of the process under examination, i.e. less complex network structures and better generalization. However, in cases of multi-dimensional data, parameter initialization is both difficult and time consuming. In the proposed scheme a novel, multi-dimensional, unsupervised clustering method is used to properly initialize neural network architectures, focusing on resource allocating networks (RAN); both the hidden and output layer parameters are determined by the output of the clustering process, without the need for any user interference. The main contribution of this work is that the proposed approach leads to network structures that are compact, efficient and achieve best classification results, without the need for manual selection of suitable initial network parameters. The efficiency of the proposed method has been tested on several classes of publicly available data, such as iris, Wisconsin and ionosphere data. PMID:15795110

Wallace, Manolis; Tsapatsoulis, Nicolas; Kollias, Stefanos

2005-03-01

493

Risk Allocation Strategies for Distributed Chance-Constrained Task Allocation Sameera S. Ponda, Luke B. Johnson and Jonathan P. How  

E-print Network

algorithms. Building on previous research that extended chance- constrained planning to stochastic multi-agent strategies for distributing risk in homogeneous and heterogeneous teams. In particular, the contributions

How, Jonathan P.

494

THE STABLE MANIFOLD THEOREM FOR SEMILINEAR STOCHASTIC EVOLUTION EQUATIONS AND  

E-print Network

THE STABLE MANIFOLD THEOREM FOR SEMILINEAR STOCHASTIC EVOLUTION EQUATIONS AND STOCHASTIC PARTIAL of this paper is to characterize the pathwise local structure of solutions of semilinear stochastic evolution finite dimension. The proof uses infinite-dimensional multiplicative ergodic theory techniques

495

Spatial stochastic resonance in protein hydrophobicity [rapid communication  

NASA Astrophysics Data System (ADS)

Stochastic resonance is usually found in nonlinear dynamical systems. Spatial stochastic resonance, however, has also been described. We present a case of spatial stochastic resonance in the sequence hydrophobicities of spider silk proteins, and briefly describe its putative significance.

Zbilut, Joseph P.; Scheibel, Thomas; Huemmerich, Daniel; Webber, Charles L.; Colafranceschi, Mauro; Giuliani, Alessandro

2005-10-01

496

A new symplectic method for a linear stochastic oscillator via stochastic variational integrators  

NASA Astrophysics Data System (ADS)

n this manuscript, we apply the stochastic variational integrators theory to a linear stochastic oscillator, to construct a new symplectic scheme via a different discretization of the stochastic action integral. Numerical tests show efficiency, as well as the second order mean-square convergence of the scheme.

Zhang, Jingjing; Wang, Lijin

2012-09-01

497

AESS: Accelerated Exact Stochastic Simulation  

NASA Astrophysics Data System (ADS)

The Stochastic Simulation Algorithm (SSA) developed by Gillespie provides a powerful mechanism for exploring the behavior of chemical systems with small species populations or with important noise contributions. Gene circuit simulations for systems biology commonly employ the SSA method, as do ecological applications. This algorithm tends to be computationally expensive, so researchers seek an efficient implementation of SSA. In this program package, the Accelerated Exact Stochastic Simulation Algorithm (AESS) contains optimized implementations of Gillespie's SSA that improve the performance of individual simulation runs or ensembles of simulations used for sweeping parameters or to provide statistically significant results. Program summaryProgram title: AESS Catalogue identifier: AEJW_v1_0 Program summary URL:http://cpc.cs.qub.ac.uk/summaries/AEJW_v1_0.html Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland Licensing provisions: University of Tennessee copyright agreement No. of lines in distributed program, including test data, etc.: 10 861 No. of bytes in distributed program, including test data, etc.: 394 631 Distribution format: tar.gz Programming language: C for processors, CUDA for NVIDIA GPUs Computer: Developed and tested on various x86 computers and NVIDIA C1060 Tesla and GTX 480 Fermi GPUs. The system targets x86 workstations, optionally with multicore processors or NVIDIA GPUs as accelerators. Operating system: Tested under Ubuntu Linux OS and CentOS 5.5 Linux OS Classification: 3, 16.12 Nature of problem: Simulation of chemical systems, particularly with low species populations, can be accurately performed using Gillespie's method of stochastic simulation. Numerous variations on the original stochastic simulation algorithm have been developed, including approaches that produce results with statistics that exactly match the chemical master equation (CME) as well as other approaches that approximate the CME. Solution method: The Accelerated Exact Stochastic Simulation (AESS) tool provides implementations of a wide variety of popular variations on the Gillespie method. Users can select the specific algorithm considered most appropriate. Comparisons between the methods and with other available implementations indicate that AESS provides the fastest known implementation of Gillespie's method for a variety of test models. Users may wish to execute ensembles of simulations to sweep parameters or to obtain better statistical results, so AESS supports acceleration of ensembles of simulation using parallel processing with MPI, SSE vector units on x86 processors, and/or using NVIDIA GPUs with CUDA.

Jenkins, David D.; Peterson, Gregory D.

2011-12-01

498

24 CFR 213.276 - Allocation of Cooperative Management Housing Insurance Fund income or losses.  

Code of Federal Regulations, 2010 CFR

... Allocation of Cooperative Management Housing Insurance Fund income...Contract Rights and Obligations-Projects Cooperative Management Housing Insurance and Distributive... Allocation of Cooperative Management Housing Insurance Fund...

2010-04-01

499

48 CFR 952.211-71 - Priorities and allocations for energy programs (contracts).  

Code of Federal Regulations, 2013 CFR

... Priorities and allocations for energy programs (contracts). 952...Regulations System DEPARTMENT OF ENERGY CLAUSES AND FORMS SOLICITATION PROVISIONS AND CONTRACT... Priorities and allocations for energy programs (contracts)....

2013-10-01

500

48 CFR 952.211-71 - Priorities and allocations for energy programs (contracts).  

Code of Federal Regulations, 2012 CFR

... Priorities and allocations for energy programs (contracts). 952...Regulations System DEPARTMENT OF ENERGY CLAUSES AND FORMS SOLICITATION PROVISIONS AND CONTRACT... Priorities and allocations for energy programs (contracts)....

2012-10-01