Stochastic Quantization and AdS/CFT
Diego S. Mansi; Andrea Mauri; Anastasios C. Petkou
2009-12-23
We argue that there is a relationship between stochastic quantization and AdS/CFT, and we present an explicit calculation to support our claim. In particular, we show that a conformally coupled scalar with phi4 interaction on AdS4 is related, via stochastic quantization as well as via AdS/CFT, to a massless scalar with phi6 interaction in 3d. We show that our results have an underlying geometric origin, which might help to elucidate further the proposed relationship between stochastic quantization and holography.
Resource allocation problems in stochastic sequential decision making
Lakshmanan, Hariharan, 1980-
2009-01-01
In this thesis, we study resource allocation problems that arise in the context of stochastic sequential decision making problems. The practical utility of optimal algorithms for these problems is limited due to their high ...
Stochastic quantization of conformally coupled scalar in AdS
Dileep P. Jatkar; Jae-Hyuk Oh
2013-05-09
We explore the relation between stochastic quantization and holographic Wilsonian renormalization group flow further by studying conformally coupled scalar in $AdS_{d+1}$. We establish one to one mapping between the radial flow of its double trace deformation and stochastic 2-point correlation function. This map is shown to be identical, up to a suitable field re-definition of the bulk scalar, to the original proposal in arXiv:1209.2242.
Ole-Christoffer Granmo; B. John Oommen
2010-01-01
In a multitude of real-world situations, resources must be allocated based on incomplete and noisy information. However, in many cases, incomplete and noisy information render traditional resource allocation techniques ineffective. The decentralized Learning Automata Knapsack Game (LAKG) was recently proposed for solving one such class of problems, namely the class of Stochastic Nonlinear Fractional Knapsack Problems. Empirically, the LAKG was
Stochastic optimisation of water allocation on a global scale
NASA Astrophysics Data System (ADS)
Schmitz, Oliver; Straatsma, Menno; Karssenberg, Derek; Bierkens, Marc F. P.
2014-05-01
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.
Measuring the Robustness of Resource Allocations in a Stochastic Dynamic Environment
Maciejewski, Anthony A. "Tony"
Measuring the Robustness of Resource Allocations in a Stochastic Dynamic Environment Jay Smith1 systems often must operate in an environment where system parameters are subject to uncertainty- source allocations in a dynamic environment where task ex- ecution times are stochastic. The methodology
A Stochastic Clustering Auction (SCA) for Centralized and Distributed Task Allocation in
Collins, Emmanuel
A Stochastic Clustering Auction (SCA) for Centralized and Distributed Task Allocation in Multi. This paper considers the problem of optimal task allocation for heteroge- neous teams, e.g., teams that if the distributed auction is such that the auctioneer allocates tasks to optimize the regional cost, then the dis
Centralized and Distributed Task Allocation in Multi-Robot Teams via a Stochastic Clustering
Collins, Emmanuel
Centralized and Distributed Task Allocation in Multi-Robot Teams via a Stochastic Clustering of optimal task allocation for heterogeneous teams, e.g., teams of heterogeneous robots or human-robot teams: Auctions and market-based systems, optimal task allocation, distributed robot systems, networked agents
A Novel Stochastic Clustering Auction for Task Allocation in Multi-Robot Teams
Barbu, Adrian
A Novel Stochastic Clustering Auction for Task Allocation in Multi-Robot Teams Kai Zhang, Emmanuel G. Collins, Adrian Barbu Abstract-- It has been shown that the global cost of the task allocations the task allocation based on the task bids provided to it by each team member [1], [2], [3], [4], [5], [6
Stochastic quantization and holographic Wilsonian renormalization group of massless fermions in AdS
NASA Astrophysics Data System (ADS)
Oh, Jae-Hyuk
2014-06-01
We have studied holographic Wilsonian renormalization group (HWRG) of free massless fermionic fields in AdS space and its stochastic quantization (SQ) by identifying the Euclidean action with its boundary on-shell action. The natural extension of the relation between stochastic two-point correlation function and double trace coupling obtained from HWRG computation conjectured in [J.-H. Oh and D. P. Jatkar, J. High Energy Phys. 1211, 144 (2012) arXiv:1209.2242] to fermionic fields is established. We have confirmed that the stochastic two-point function precisely captures the radial flow of the double trace coupling via this relation.
Topaloglu, Huseyin
Computing Protection Level Policies for Dynamic Capacity Allocation Problems by Using Stochastic capacity allocation problem. We have a fixed amount of daily processing capacity. Jobs of different to minimize the total expected cost over a planning horizon. In this paper, we focus on a class of policies
Ad Serving Using a Compact Allocation Plan PEIJI CHEN, Yahoo! Labs
Fiat, Amos
Ad Serving Using a Compact Allocation Plan PEIJI CHEN, Yahoo! Labs WENJING MA, Yahoo! Labs SRINATH is then tasked with solving the ad serving problem --given a user visit, which of the thousands of matching is available and (3) the minute amount of resources available online, as an ad server must respond
Price/Utility-based Optimized Resource Allocation in Wireless Ad hoc Networks
Price/Utility-based Optimized Resource Allocation in Wireless Ad hoc Networks Calin Curescu solution. A key concept, borrowed from the dual of the optimal allocation problem, is the shadow price the bandwidth based on bids that are calculated using the shadow price of the resources and the flow's utility
A stochasticity threshold in holography and the instability of AdS
NASA Astrophysics Data System (ADS)
Basu, Pallab; Krishnan, Chethan; Saurabh, Ayush
2015-07-01
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 existence 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 nonlinear instability of AdS observed by Bizon and Rostworowski, with the Fermi-Pasta-Ulam-Tsingou-like quasiperiodicity noticed recently for some classes of initial conditions. We show that our simple setup captures many of the relevant features of the full gravity-scalar system.
The Organization of Work in Social Insect Task Allocation as an Ad Hoc, Dynamical Network
White, Douglas R.
The Organization of Work in Social Insect Colonies Task Allocation as an Ad Hoc, Dynamical Network A social insect colony operates without any central control; no one is in charge, and no colony member
978-1-4244-1694-3/08/$25.00 2008 IEEE A Stochastic Model for Robust Resource Allocation
Maciejewski, Anthony A. "Tony"
not imply that machine 1 is uniformly faster on all tasks. Resource allocation in such computing allocation decisions are often based on es- timated values of task and system parameters, whose actual values978-1-4244-1694-3/08/$25.00 ©2008 IEEE A Stochastic Model for Robust Resource Allocation
Analysis of a Stochastic Model of Adaptive Task Allocation in Robots
Galstyan, Aram
.g., robots, allow the researcher to observe swarms under real conditions; however, experiments are very parameters determine group behavior and how individual robot characteristics affect the swarm. Addition- allyAnalysis of a Stochastic Model of Adaptive Task Allocation in Robots Aram Galstyan and Kristina
Dynamic address allocation protocols for Mobile ad hoc networks
Patchipulusu, Praveena
2001-01-01
the concept of the central node allocating the IP address but the functionality of the central node is distributed among all the nodes. This protocol uses mac addresses to identify network merging. This thesis also proposes another solution in which unique...
Resource Allocation for QoS Provisioning in Wireless Ad Hoc Networks
Resource Allocation for QoS Provisioning in Wireless Ad Hoc Networks Mung Chiang1 , Daniel ONeill maximizes the overall system throughput subject to QoS constraints on power, probability of outage, and data ad hoc network, where each link is shared by mul- tiple streams of traffic from different QoS classes
Optimal Resource Allocation for MIMO Ad Hoc Cognitive Radio Networks
Seung-Jun Kim; Georgios B. Giannakis
2011-01-01
Maximization of the weighted sum-rate of secondary users (SUs) possibly equipped with multiantenna transmitters and receivers is considered in the context of cognitive radio (CR) net- works with coexisting primary users (PUs). The total interference power received at the primary receiver is constrained to main- tain reliable communication for the PU. An interference channel configuration is considered for ad hoc
Visualization of Resource Allocation on Large-Scale Mobile Ad-hoc Networks
Visualization of Resource Allocation on Large-Scale Mobile Ad-hoc Networks Alex Fridman, David. Visual representation of this information across physical space and across layers of the network can capabilities, indicating that multi-layered visualization of the network state can be an effective tool
Visualization of Resource Allocation in Large-Scale Mobile Ad Hoc Networks
Breen, David E.
networks. We develop such a software system, and demonstrate some of its capabilities. The system networks that achieves a reasonable balance between these two objectives. The four layers we define areVisualization of Resource Allocation in Large-Scale Mobile Ad Hoc Networks Alex Fridman, Dan
Channel allocation in OFDMA-based wireless ad-hoc networks
NASA Astrophysics Data System (ADS)
Kulkarni, Gautam; Raghunathan, Vijay; Srivastava, Mani B.; Gerla, Mario
2002-12-01
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.
Dynamic fair node spectrum allocation for ad hoc networks using random matrices
NASA Astrophysics Data System (ADS)
Rahmes, Mark; Lemieux, George; Chester, Dave; Sonnenberg, Jerry
2015-05-01
Dynamic Spectrum Access (DSA) is widely seen as a solution to the problem of limited spectrum, because of its ability to adapt the operating frequency of a radio. Mobile Ad Hoc Networks (MANETs) can extend high-capacity mobile communications over large areas where fixed and tethered-mobile systems are not available. In one use case with high potential impact, cognitive radio employs spectrum sensing to facilitate the identification of allocated frequencies not currently accessed by their primary users. Primary users own the rights to radiate at a specific frequency and geographic location, while secondary users opportunistically attempt to radiate at a specific frequency when the primary user is not using it. We populate a spatial radio environment map (REM) database with known information that can be leveraged in an ad hoc network to facilitate fair path use of the DSA-discovered links. Utilization of high-resolution geospatial data layers in RF propagation analysis is directly applicable. Random matrix theory (RMT) is useful in simulating network layer usage in nodes by a Wishart adjacency matrix. We use the Dijkstra algorithm for discovering ad hoc network node connection patterns. We present a method for analysts to dynamically allocate node-node path and link resources using fair division. User allocation of limited resources as a function of time must be dynamic and based on system fairness policies. The context of fair means that first available request for an asset is not envied as long as it is not yet allocated or tasked in order to prevent cycling of the system. This solution may also save money by offering a Pareto efficient repeatable process. We use a water fill queue algorithm to include Shapley value marginal contributions for allocation.
Performance-based workload assessment: Allocation strategy and added task sensitivity
NASA Technical Reports Server (NTRS)
Vidulich, Michael A.
1990-01-01
The preliminary results of a research program investigating the use of added tasks to evaluate mental workload are reviewed. The focus of the first studies was a reappraisal of the traditional secondary task logic that encouraged the use of low-priority instructions for the added task. It was believed that such low-priority tasks would encourage subjects to split their available resources among the two tasks. The primary task would be assigned all the resources it needed, and any remaining reserve capacity would be assigned to the secondary task. If the model were correct, this approach was expected to combine sensitivity to primary task difficulty with unintrusiveness to primary task performance. The first studies of the current project demonstrated that a high-priority added task, although intrusive, could be more sensitive than the traditional low-priority secondary task. These results suggested that a more appropriate model of the attentional effects associated with added task performance might be based on capacity switching, rather than the traditional optimal allocation model.
AdOpt: Analog VLSI Stochastic Optimization for Adaptive Optics Marc Cohen Mikhail Vorontsov
Cauwenberghs, Gert
AdOpt: Analog VLSI Stochastic Optimization for Adaptive Optics Marc Cohen Mikhail Vorontsov R). This as- sumption of a point source is the foundation of the most widely used adaptive optics control Electrical and Computer Engineering Intelligent Optics Laboratory Baltimore, MD 21218 Adelphi, MD 20783 fmarc
A bidding algorithm for optimized utility-based resource allocation in ad hoc networks
mobility or less frequent allocations. Index Terms-- Mobile computing, pricing and resource alloca- tion-time (multimedia), and high- priority critical data, seamlessly integrate. As society becomes dependable
A Stochastic Approach to Measuring the Robustness of Resource Allocations in Distributed Systems
Maciejewski, Anthony A. "Tony"
- odically updated data sets, e.g., surveillance for homeland security, monitoring vital signs of medical with uncertainty. Deter- mining a resource allocation that accounts for this uncer- tainty in a way that can patients. Typ- ically, in such systems, sensors (e.g., radar, sonar, video camera) produce data sets
NASA Astrophysics Data System (ADS)
Kun, Ye; Li, Li; Jiaxiang, Tang
2003-06-01
Viscoelastic dampers, as supplementary energy dissipation devices, have been used in building structures under seismic excitation or wind loads. Different analytical models have been proposed to describe their dynamic force deformation characteristics. Among these analytical models, the fractional derivative models have attracted more attention as they can capture the frequency dependence of the material stiffness and damping properties observed from tests very well. In this paper, a Fourier-transform-based technique is presented to obtain the fractional unit impulse function and the response of structures with added viscoelastic dampers whose force-deformation relationship is described by a fractional derivative model. Then, a Duhamel integral-type expression is suggested for the response analysis of a fractional damped dynamic system subjected to deterministic or random excitation. Through numerical verification, it is shown that viscoelastic dampers are effective in reducing structural responses over a wide frequency range, and the proposed schemes can be used to accurately predict the stochastic seismic response of structures with added viscoelastic dampers described by a Kelvin model with fractional derivative.
Allocate Fair Payoff for Cooperation in Wireless Ad Hoc Networks Using Shapley Value
Jianfeng Cai; Udo W. Pooch
2004-01-01
Summary form only given. In wireless mobile ad hoc networks (MANET), energy is a scarce resource. Though cooperation is the basis of network services, due to the limited energy reserve of each node, there is no guarantee any given protocols would be followed by nodes managed by different authorities. Instead of treating the selfish nodes as a security concern and
ZAL: Zero-Maintenance Address Allocation in Mobile Wireless Ad Hoc Networks
Li, Baochun
a6 to Internet 2.5G data cellular link (e.g., GPRS) PAN connection (e.g. Bluetooth) WLAN ad hoc mode technologies together (e.g., Wireless Local Area Networks (WLAN), Personal Area Networks (PAN) and Cellular interfaces for both cellular (GPRS) and PAN (Bluetooth) connections. However, mobile devices a1 to a6
NASA Astrophysics Data System (ADS)
Cardoso, T.; Oliveira, M. D.; Barbosa-Póvoa, A.; Nickel, S.
2015-05-01
Although the maximization of health is a key objective in health care systems, location-allocation literature has not yet considered this dimension. This study proposes a multi-objective stochastic mathematical programming approach to support the planning of a multi-service network of long-term care (LTC), both in terms of services location and capacity planning. This approach is based on a mixed integer linear programming model with two objectives - the maximization of expected health gains and the minimization of expected costs - with satisficing levels in several dimensions of equity - namely, equity of access, equity of utilization, socioeconomic equity and geographical equity - being imposed as constraints. The augmented ?-constraint method is used to explore the trade-off between these conflicting objectives, with uncertainty in the demand and delivery of care being accounted for. The model is applied to analyze the (re)organization of the LTC network currently operating in the Great Lisbon region in Portugal for the 2014-2016 period. Results show that extending the network of LTC is a cost-effective investment.
Zolfaghari, Mohammad R; Peyghaleh, Elnaz
2015-03-01
This article presents a new methodology to implement the concept of equity in regional earthquake risk mitigation programs using an optimization framework. It presents a framework that could be used by decisionmakers (government and authorities) to structure budget allocation strategy toward different seismic risk mitigation measures, i.e., structural retrofitting for different building structural types in different locations and planning horizons. A two-stage stochastic model is developed here to seek optimal mitigation measures based on minimizing mitigation expenditures, reconstruction expenditures, and especially large losses in highly seismically active countries. To consider fairness in the distribution of financial resources among different groups of people, the equity concept is incorporated using constraints in model formulation. These constraints limit inequity to the user-defined level to achieve the equity-efficiency tradeoff in the decision-making process. To present practical application of the proposed model, it is applied to a pilot area in Tehran, the capital city of Iran. Building stocks, structural vulnerability functions, and regional seismic hazard characteristics are incorporated to compile a probabilistic seismic risk model for the pilot area. Results illustrate the variation of mitigation expenditures by location and structural type for buildings. These expenditures are sensitive to the amount of available budget and equity consideration for the constant risk aversion. Most significantly, equity is more easily achieved if the budget is unlimited. Conversely, increasing equity where the budget is limited decreases the efficiency. The risk-return tradeoff, equity-reconstruction expenditures tradeoff, and variation of per-capita expected earthquake loss in different income classes are also presented. PMID:25676412
Lambe, J; Cadby, P; Gibney, M
2002-01-01
Estimates of exposure to intentionally added flavouring substances based on two indirect methods, namely the theoretical added maximum daily intake (TAMDI) and maximized survey-derived daily intake (MSDI), were compared with exposure estimates based on a flavourings stochastic model (FSM). Twelve flavouring substances were chosen to reflect broadly the large number of flavouring substances currently used in Europe. Over 40,000 flavour formulae used at known levels of incorporation in 31 different categories of food and beverages were examined to provide maximum concentrations, distributions of concentrations and an indication of the probability of encountering each substance in a flavoured food or beverage in any category. Food consumption data were based on the intakes of males, aged 16-24 years, according to the Dietary and Nutritional Survey of British Adults (1988). The percentage of flavoured brands within food groups was estimated using the Irish National Food Ingredient Database. For all 12 flavouring substances, the estimates of TAMDI were > 97.5th percentile of the FSM, sometimes by > 3 orders of magnitude. With the exception of 2,6-dimethyl pyrazine, the 97.5th percentile of the FSM was less than the MSDI estimate. The probability of the FSM estimates exceeding the TAMDI ranged from < 0.0001 to 0.0037 for the 12 substances, while the probability of exceeding the MSDI estimates ranged from 0.0004 to 0.0753. The study supports the findings of a recent publication using detailed dietary analysis of US data that also indicated that the MSDI appeared, within the limits of the studies, to be a practical and conservative method for assessing exposure to intentionally added flavouring substances. PMID:11811764
Online Stochastic Reservation Systems
Pascal Van Hentenryck; Russell Bent; Yannis Vergados
2006-01-01
This paper considers online stochastic reservation proble ms, where requests come online and must be dynamically allocated to limited resources in order to maximize profit. Multi-knapsack problems with or wi thout overbooking are examples of such online stochastic reservations. The paper studies how to adapt the online stochastic framework and the consensus and regret algorithms proposed earlier to online stochastic
Online stochastic reservation systems
Pascal Van Hentenryck; Russell Bent; Luc Mercier; Yannis Vergados
2009-01-01
This paper considers online stochastic reservation problems, where requests come online and must be dynamically allocated to limited resources in order to maximize profit. Multi-knapsack problems with or without overbooking are examples of such online stochastic reservations. The paper studies how to adapt the online stochastic framework and the consensus and regret algorithms proposed earlier to online stochastic reservation systems.
Singh, Santosh Kumar
2010-01-01
Spectrum is a scarce commodity, and considering the spectrum scarcity faced by the wireless-based service providers led to high congestion levels. Technical inefficiencies from pooled spectrum (this is nothing but the "common carrier principle" adopted in oil/gas/electricity pipelines/networks.), since all ad hoc networks share a common pool of channels, exhausting the available channels will force ad hoc networks to block the services. Researchers found that cognitive radio (CR) technology may resolve the spectrum scarcity. CR network proved to next generation wireless communication system that proposed as a way to reuse under-utilised spectrum of licensee user (primary network) in an opportunistic and non-interfering basis. A CR is a self-configuring entity in a wireless networking that senses its environment, tracks changes, and frequently exchanges information with their networks. Adding this layer of such intelligence to the ad hoc network by looking at the overall geography of the network known as cogni...
A Stochastic Geometry Approach to the Modeling of IEEE 802.11p for Vehicular Ad
Haenggi, Martin
on queueing theory. For example, the performance of the carrier-sense multiple access with collision avoidance, Queueing Theory, Poisson Point Process, Matern Hard- core Point Process I. INTRODUCTION A. Motivation Vehicular ad hoc networks (VANETs) are an important component of intelligent transportation systems
Risk allocation strategies for distributed chance-constrained task allocation
Ponda, Sameera S.
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 ...
Hiroyuki Mino; Dominique M. Durand
2008-01-01
Stochastic resonance (SR) has been shown to enhance the signal to noise ratio or detection of signals in neurons. It has not been clear yet if SR can play an important role in information processing in neural networks. In this paper, we test the hypothesis through computer simulations that SR can induce an oscillation phenomenon in a recurrent neural network
Cruz, Frederico
Networks, Buffer Allocation Problem typeset May 18, 2004 Smith & Cruz The Buffer Allocation Problem for General Finite Buffer Queueing Networks J. MacGregor Smith F. R. B. Cruz e-mail: jmsmith@ecs.umass.edu e-mail: fcruz@ufmg.br May 18, 2004 Abstract -- The Buffer Allocation Problem (BAP) is a difficult stochastic
Yield Optimization of Display Advertising with Ad Exchange
Balseiro, Santiago; Mirrokni, Vahab; Muthukrishnan, S
2011-01-01
In light of the growing market of Ad Exchanges for the real-time sale of advertising slots, publishers face new challenges in choosing between the allocation of contract-based reservation ads and spot market ads. In this setting, the publisher should take into account the tradeoff between short-term revenue from an Ad Exchange and quality of allocating reservation ads. In this paper, we formalize this combined optimization problem as a stochastic control problem and derive an efficient policy for online ad allocation in settings with general joint distribution over placement quality and exchange bids. We prove asymptotic optimality of this policy in terms of any trade-off between quality of delivered reservation ads and revenue from the exchange, and provide a rigorous bound for its convergence rate to the optimal policy. We also give experimental results on data derived from real publisher inventory, showing that our policy can achieve any pareto-optimal point on the quality vs. revenue curve. Finally, we st...
Resonance with Stochastic Time
NASA Astrophysics Data System (ADS)
Ohira, Toru
2010-06-01
We introduce a resonant phenomenon using a model incorporating delay (temporal non-locality) and stochastic time (temporal stochasticity). Although this model is a very simple linear dynamical differential equation, the addition of these elements makes it very rich. As an illustrative example, we describe a human stick balancing experiment that includes added fluctuations. We discuss how these concepts of temporal non-locality and stochasticity could play a role in characterizing biological and physiological systems, as well as in physics.
Stochastic Network Programming for Financial Planning Problems
John M. Mulvey; Hercules Vladimirou
1992-01-01
Several financial planning problems are posed as dynamic generalized network models with stochastic parameters. Examples include: asset allocation for portfolio selection, international cash management, and programmed-trading arbitrage. Despite the large size of the resulting stochastic programs, the network structure can be exploited within the solution strategy giving rise to efficient implementations. Empirical results are presented indicating the benefits of the
DYNAMIC ASSET ALLOCATION BY STOCHASTIC PROGRAMMING METHODS
Stanford University
Approved for the University Committee on Graduate Studies. iii #12;iv #12;Abstract This thesis addresses kinds of sports and politics in between). His support made my time here both intellectually productive
Distributed chance-constrained task allocation for autonomous multi-agent teams
Ponda, Sameera S.
This research presents a distributed chanceconstrained task allocation framework that can be used to plan for multi-agent networked teams operating in stochastic and dynamic environments. The algorithm employs an approximation ...
Toru Ohira
2007-01-07
We present a simple dynamical model to address the question of introducing a stochastic nature in a time variable. This model includes noise in the time variable but not in the "space" variable, which is opposite to the normal description of stochastic dynamics. The notable feature is that these models can induce a "resonance" with varying noise strength in the time variable. Thus, they provide a different mechanism for stochastic resonance, which has been discussed within the normal context of stochastic dynamics.
Active and reactive power in stochastic resonance for energy harvesting
Kubota, Madoka; Hikihara, Takashi
2015-01-01
A power allocation to active and reactive power in stochastic resonance is discussed for energy harvesting from mechanical noise. It is confirmed that active power can be increased at stochastic resonance, in the same way of the relationship between energy and phase at an appropriate setting in resonance.
Online allocation algorithms with applications in computational advertising
Zadimoghaddam, Morteza
2014-01-01
Over the last few decades, a wide variety of allocation markets emerged from the Internet and introduced interesting algorithmic challenges, e.g., ad auctions, online dating markets, matching skilled workers to jobs, etc. ...
Learning and Exploiting Knowledge in Multi-Agent Task Allocation Problems
Stanley, Kenneth O.
Learning and Exploiting Knowledge in Multi-Agent Task Allocation Problems Adam Campbell School the tasks they are assigned. How will various task allocation approaches perform when there exists this added level of complexity? In particular, we compare two task allocation strategies: a greedy, first
Continuous-Model Communication Complexity with Application in Distributed Resource Allocation in
Dai, Huaiyu
, is studied and the resource allocation is considered to be the procedure of computing a common function whose, distributed resource allocation is receiving intensive study in the community of wireless ad hoc networks [4Continuous-Model Communication Complexity with Application in Distributed Resource Allocation
The allocative efficiency implications of water pollution abatement cost comparisons
James S. Shortle
1990-01-01
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
Reinforcement Learning for Dynamic Channel Allocation in Cellular Telephone Systems
Dimitri Bertsekas; Satinder Singh
1997-01-01
In cellular telephone systems, an important problem is to dynamically allocatethe communication resource (channels) so as to maximize service ina stochastic caller environment. This problem is naturally formulated as adynamic programming problem and we use a reinforcement learning (RL)method to find dynamic channel allocation policies that are better thanprevious heuristic solutions. The policies obtained perform well for a broadvariety of
Risk Adjusted Budget Allocation Models with Application in Homeland Security
Jian Hu; Tito Homem-de Mello; Sanjay Mehrotra
2011-01-01
This paper presents and studies models for multi-criterion budget allocation problems under uncertainty. The proposed models incorporate uncertainties in decision maker’s weights using a robust weighted sum approach. The risk averseness of the decision maker in satisfying random risk related constraints is ensured by using stochastic dominance. A sample average approximation approach together with a cutting surface method is used
Latent IBP Compound Dirichlet Allocation.
Archambeau, Cedric; Lakshminarayanan, Balaji; Bouchard, Guillaume
2015-02-01
We introduce the four-parameter IBP compound Dirichlet process (ICDP), a stochastic process that generates sparse non-negative vectors with potentially an unbounded number of entries. If we repeatedly sample from the ICDP we can generate sparse matrices with an infinite number of columns and power-law characteristics. We apply the four-parameter ICDP to sparse nonparametric topic modelling to account for the very large number of topics present in large text corpora and the power-law distribution of the vocabulary of natural languages. The model, which we call latent IBP compound Dirichlet allocation (LIDA), allows for power-law distributions, both, in the number of topics summarising the documents and in the number of words defining each topic. It can be interpreted as a sparse variant of the hierarchical Pitman-Yor process when applied to topic modelling. We derive an efficient and simple collapsed Gibbs sampler closely related to the collapsed Gibbs sampler of latent Dirichlet allocation (LDA), making the model applicable in a wide range of domains. Our nonparametric Bayesian topic model compares favourably to the widely used hierarchical Dirichlet process and its heavy tailed version, the hierarchical Pitman-Yor process, on benchmark corpora. Experiments demonstrate that accounting for the power-distribution of real data is beneficial and that sparsity provides more interpretable results. PMID:26353244
Variational Principles for Stochastic Soliton Dynamics
DD Holm; TM Tyranowski
2015-03-11
We develop a variational method of deriving stochastic partial differential equations whose solutions follow the flow of a stochastic vector field. As an example in one spatial dimension we numerically simulate singular solutions (peakons) of the stochastically perturbed Camassa-Holm (CH) equation derived using this method. These numerical simulations show that peakon soliton solutions of the stochastically perturbed CH equation persist and provide an interesting laboratory for investigating the sensitivity and accuracy of adding stochasticity to finite dimensional solutions of stochastic partial differential equations (SPDE). In particular, some choices of stochastic perturbations of the peakon dynamics by Wiener noise (canonical Hamiltonian stochastic deformations, or CH-SD) allow peakons to interpenetrate and exchange order on the real line in overtaking collisions, although this behaviour does not occur for other choices of stochastic perturbations which preserve the Euler-Poincar\\'e structure of the CH equation (parametric stochastic deformations, or P-SD), and it also does not occur for peakon solutions of the unperturbed deterministic CH equation. The discussion raises issues about the science of stochastic deformations of finite-dimensional approximations of evolutionary PDE and the sensitivity of the resulting solutions to the choices made in stochastic modelling.
Software Function Allocation Methodology
O'Neal, Michael Ralph
1988-01-01
for each hardware subsystem and will be recorded on SFAM documentation form 1B. 4. 2. 2 SFAM Design Parameter List For the specific software function allocation decision being studied, the Design Parameters shown in Table 8 below should be selected... requires documentation of all design decisions made and their rationales. By providing a standard and consistent structure for the allocation of software functions, SPAN will promote more thorough and uniform software function allocation analyses...
Yield Optimization of Display Advertising with Ad Exchange Santiago Balseiro
Sandholm, Tuomas W.
of contract-based reservation ads and spot market ads. In this setting, the pub- lisher should take- livering good quality spots to the reservation ads. In this paper, we formalize this combined optimization problem as a stochas- tic control problem and derive an efficient policy for online ad allocation
Google's Auction for TV Ads Preliminary version
Nisan, Noam
Google's Auction for TV Ads Preliminary version Noam Nisan Jason Bayer Deepak Chandra Tal Franji Robert Gardner Yossi Matias Neil Rhodes Misha Seltzer Danny Tom Hal Varian Dan Zigmond Google Inc. Abstract This document describes the auction system used by Google for allocation and pricing of TV ads
Online Ad Slotting With Cancellations
Constantin, Florin; Muthukrishnan, S; Pal, Martin
2008-01-01
Many advertisers buy advertisements (ads) on the Internet or on traditional media and seek simple, online mechanisms to reserve ad slots in advance. Media publishers represent a vast and varying inventory, and they too seek automatic, online mechanisms for pricing and allocating such reservations. In this paper, we present and study a simple model for auctioning such ad slots in advance. Bidders arrive sequentially and report which slots they are interested in. The seller must decide immediately whether or not to grant a reservation. Our model allows a seller to accept reservations, but possibly cancel the allocations later and pay the bidder a cancellation compensation (bump payment). Our main result is an online mechanism to derive prices and bump payments that is efficient to implement. This mechanism has many desirable properties. It is individually rational; winners have an incentive to be honest and bidding one's true value dominates any lower bid. Our mechanism's efficiency is within a constant fractio...
Appel, A.W.
1988-01-01
In a programming environment with both concurrency and automatic garbage collection, the allocation and initialization of a new record is a sensitive matter: if it is interrupted halfway through, the allocating process may be in a state that the garbage collector can't understand. In particular, the collector won't know which words of the new record have been initialized and which are meaningless (and unsafe to transverse). For this reason, parallel implementations usually use a locking or semaphore mechanism to ensure that allocation is an atomic operation. The locking significantly adds to the cost of allocation. This paper shows that allocation can run extremely quickly even in a multi-thread environment: open-coded, without locking.
Abdallah Smida; Mahmoud Hachemane; Amel-Hiba Hamici
2015-02-24
A new concept of qubits is given by considering entanglement of ordinary quibits with quantum measuring devices (micro-detectors). They are called stochastic qubits since they are generalized coherent states used in the stochastic (phase space) quantum theory. Entanglement is realized through the coupling of angular momenta $l$ and $\\sigma$, where the micro-detector has $l=0,1$ and the qubit spin is $\\sigma=1/2$. In both cases, the stochastic qubit has total spin $J=1/2$ and is entangled only when $l=1$. In this case, Stochastic Bell states have been defined and teleportation has been studied. They resemble conventional ones. When the micro-detecors have only two states, Stochastic qudits have rather been used. Here, Stochastic Bell states have also been defined and teleportation is possible for special states only. In the last step of this teleportation, Bob will have to transform the qubit only, or the micro-detector only, to recover Alice state.
Resource Allocation o deadlocks
Biagioni, Edoardo S.
3 #12; Interchangeable Resources o examples - memory space - disk space Resource Allocation o deadlocks o distinguishable vs. interchangeable resources o input is a sequence of requests for resources o output is a sequence of granting
A Method for Reducing the Severity of Epidemics by Allocating Vaccines According to Centrality
Drewniak, Krzysztof; Mikler, Armin R
2014-01-01
One long-standing question in epidemiological research is how best to allocate limited amounts of vaccine or similar preventative measures in order to minimize the severity of an epidemic. Much of the literature on the problem of vaccine allocation has focused on influenza epidemics and used mathematical models of epidemic spread to determine the effectiveness of proposed methods. Our work applies computational models of epidemics to the problem of geographically allocating a limited number of vaccines within several Texas counties. We developed a graph-based, stochastic model for epidemics that is based on the SEIR model, and tested vaccine allocation methods based on multiple centrality measures. This approach provides an alternative method for addressing the vaccine allocation problem, which can be combined with more conventional approaches to yield more effective epidemic suppression strategies. We found that allocation methods based on in-degree and inverse betweenness centralities tended to be the most ...
B. L. Hu
1999-02-22
We give a summary of the status of current research in stochastic semiclassical gravity and suggest directions for further investigations. This theory generalizes the semiclassical Einstein equation to an Einstein-Langevin equation with a stochastic source term arising from the fluctuations of the energy-momentum tensor of quantum fields. We mention recent efforts in applying this theory to the study of black hole fluctuations and backreaction problems, linear response of hot flat space, and structure formation in inflationary cosmology. To explore the physical meaning and implications of this stochastic regime in relation to both classical and quantum gravity, we find it useful to take the view that semiclassical gravity is mesoscopic physics and that general relativity is the hydrodynamic limit of certain spacetime quantum substructures. Three basic issues - stochasticity, collectivity, correlations- and three processes - dissipation, fluctuations, decoherence- underscore the transformation from quantum micro structure and interaction to the emergence of classical macro structure and dynamics. We discuss ways to probe into the high energy activity from below and make two suggestions: via effective field theory and the correlation hierarchy. We discuss how stochastic behavior at low energy in an effective theory and how correlation noise associated with coarse-grained higher correlation functions in an interacting quantum field could carry nontrivial information about the high energy sector. Finally we describe processes deemed important at the Planck scale, including tunneling and pair creation, wave scattering in random geometry, growth of fluctuations and forms, Planck scale resonance states, and spacetime foams.
NASA Astrophysics Data System (ADS)
Snopkowski, Ryszard; Sukiennik, Marta
2013-03-01
A calculation example of the longwall face crew selection, including taking under consideration stochastic character of the production process is presented in this study. On the basis of observation of duration of activities realized in the hard coal mine longwall face with use of the roof cut and fill system, the calculations with use of the proposed crew selection method have been executed. The method in question takes into consideration stochastic character of the realized production process (Snopkowski & Sukiennik, 2012). In the final part of this study, graphical interpretation of the executed calculations has been presented.
NASA Astrophysics Data System (ADS)
The Fourth IAHR International Symposium on Stochastic Hydraulics, cosponsored by AGU and the American Society of Civil Engineers, will be held July 31-August 2, 1984, at Urbana, 111. About 40 papers selected from submitted abstracts will be presented in the symposium.Topics covered will include (but not be limited to) the following areas: risk and reliability analysis; safety of dams and other hydraulic structures; stochastic models; and stochastic processes of hydraulic and hydrologic phenomena such as turbulence, sediment transport, dispersion and diffusion, and random waves.The proceedings of the Second International Conference, held in Urbana, Illinois, in June 1981, are available from Water Resources Publications, Littleton, Colo., under the title, “Urban Stormwater Hydraulics and Hydrology” and “Urban Stormwater Quality, Management, and Planning.”
A stochastic index flow model of flow duration curves Attilio Castellarin
Vogel, Richard M.
analysis, water quality management, waste load allocation, water resource allocation, flood frequencyA stochastic index flow model of flow duration curves Attilio Castellarin Faculty of Engineering, Universita` di Bologna, Bologna, Italy Richard M. Vogel WaterSHED Center, Department of Civil
Dynamic priority allocation via restless bandit marginal productivity indices
José Niño-Mora
2007-01-01
This paper surveys recent work by the author on the theoretical and algorithmic aspects of restless bandit indexation as well\\u000a as on its application to a variety of problems involving the dynamic allocation of priority to multiple stochastic projects.\\u000a The main aim is to present ideas and methods in an accessible form that can be of use to researchers addressing
Stochastic synchronization of coupled neural networks with intermittent control
NASA Astrophysics Data System (ADS)
Yang, Xinsong; Cao, Jinde
2009-08-01
In this Letter, we study the exponential stochastic synchronization problem for coupled neural networks with stochastic noise perturbations. Based on Lyapunov stability theory, inequality techniques, the properties of Weiner process, and adding different intermittent controllers, several sufficient conditions are obtained to ensure exponential stochastic synchronization of coupled neural networks with or without coupling delays under stochastic perturbations. These stochastic synchronization criteria are expressed in terms of several lower-dimensional linear matrix inequalities (LMIs) and can be easily verified. Moreover, the results of this Letter are applicable to both directed and undirected weighted networks. A numerical example and its simulations are offered to show the effectiveness of our new results.
NASA Astrophysics Data System (ADS)
Eichhorn, Ralf; Aurell, Erik
2014-04-01
'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
Javier L. Albacete; Yuri V. Kovchegov; Anastasios Taliotis
2009-01-01
We calculate the total cross section for the scattering of a quark-anti-quark dipole on a large nucleus at high energy for a strongly coupled = 4 super Yang-Mills theory using AdS\\/CFT correspondence. We model the nucleus by a metric of a shock wave in AdS5. We then calculate the expectation value of the Wilson loop (the dipole) by finding the
Stochastic resonance in electrical circuits. II. Nonconventional stochastic resonance
Dmitrii G. Luchinsky; Riccardo Mannella; Peter V. E. McClintock; Nigel G. Stocks
1999-01-01
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
Immigration-extinction dynamics of stochastic populations
NASA Astrophysics Data System (ADS)
Meerson, Baruch; Ovaskainen, Otso
2013-07-01
How high should be the rate of immigration into a stochastic population in order to significantly reduce the probability of observing the population become extinct? Is there any relation between the population size distributions with and without immigration? Under what conditions can one justify the simple patch occupancy models, which ignore the population distribution and its dynamics in a patch, and treat a patch simply as either occupied or empty? We answer these questions by exactly solving a simple stochastic model obtained by adding a steady immigration to a variant of the Verhulst model: a prototypical model of an isolated stochastic population.
The benefits of allocating sex
West, Stuart A; Herre, E Allen; Sheldon, Ben C
2000-01-01
Evolutionary biologists have developed an excellent understanding of the selective factors that shape the way that a given organism allocates resourses to male and female offspring- a process called sex allocation.
Code of Federal Regulations, 2010 CFR
2010-04-01
...HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION GUIDELINES SAFETY INCENTIVE GRANTS FOR USE OF SEAT BELTS-ALLOCATIONS BASED ON SEAT BELT USE RATES Determination of Allocations § 1240.15 Allocations. (a) Funds allocated...
Selfish task allocation Elias Koutsoupias
Koutsoupias, Elias
Selfish task allocation Elias Koutsoupias University of Athens and UCLA elias@di.uoa.gr September 1 of scheduling or task allocation. I will discuss the issues of this area, mention the central results that will concern us in this note. Ideally the tasks are allocated to machines so that the makespan (or some other
Enderton, Eric; Sintorn, Erik; Shirley, Peter; Luebke, David
2011-08-01
Stochastic transparency provides a unified approach to order-independent transparency, antialiasing, and deep shadow maps. It augments screen-door transparency using a random sub-pixel stipple pattern, where each fragment of transparent geometry covers a random subset of pixel samples of size proportional to alpha. This results in correct alpha-blended colors on average, in a single render pass with fixed memory size and no sorting, but introduces noise. We reduce this noise by an alpha correction pass, and by an accumulation pass that uses a stochastic shadow map from the camera. At the pixel level, the algorithm does not branch and contains no read-modify-write loops, other than traditional z-buffer blend operations. This makes it an excellent match for modern massively parallel GPU hardware. Stochastic transparency is very simple to implement and supports all types of transparent geometry, able without coding for special cases to mix hair, smoke, foliage, windows, and transparent cloth in a single scene. PMID:20921587
NSDL National Science Digital Library
Math is Fun Website
2011-09-23
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.
An Efficient Stochastic Clustering Auction for Heterogeneous Robot Teams
Barbu, Adrian
An Efficient Stochastic Clustering Auction for Heterogeneous Robot Teams Kai Zhang and Emmanuel G for effective coordination of heterogeneous robotic systems have numerous applications. For example, they can be used for efficient task allocation for teams of robots in many application domains [1], [2] such as col
Performance Optimization for a Class of Generalized Stochastic Petri Nets
Reveliotis, Spiridon "Spyros"
}@isye.gatech.edu Abstract Motivated by the current scheduling needs of complex resource allocation systems, this paper by the human modeler so that they reflect properly the (intended) operation of the underlying system. The proposed methodology leverages the Generalized Stochastic Petri Net (GSPN) modeling framework in order
Turgut, Damla
Chatterjee Abstract-- The distributiveness of mobile ad hoc networks makes resource allocation strategies and Mainak Chatterjee are with the School of Electrical Engineering and Computer Science, University
Communication Constrained Task Allocation For Robotic Networks
Lynch, Nancy
Communication Constrained Task Allocation For Robotic Networks Stephen L. Smith Distibuted Robotics Allocation 1 #12;Task allocation Given: · a group of robots, and · a set of tasks Task allocation Divide: robots divide tasks among themselves Stephen L. Smith Task Allocation 2 #12;Task allocation Given
Allocating budget across portals in search engine advertising
Chen Li-gang; Li Yi-jun
2009-01-01
As increasingly popular of search engine advertising which displays advertisements alongside the search results in response to user queries, advertisers can issue ads campaigns across different search engines simultaneously for better return of investment and overall clicks. Advertisers typically have a limited budget that should not be overspent, therefore advertisers must decide how to allocate budget across portals by selecting
Stochastic resonance: An approach for enhanced medical image processing
Renbin Peng; Hao Chen; Pramod K. Varshney; James H. Michels
2007-01-01
This paper presents a novel application of the stochastic resonance effect in medical image processing. Aiming to improve system performance, two noise modified image processing schemes are proposed. Performances of several medical image processing systems are shown to improve when suitable stochastic resonance noise is added.
Online Ad Slotting With Cancellations Florin Constantin
Chen, Yiling
or on traditional me- dia such as radio, TV and newsprint. They seek a simple, online mechanism to reserve ad slots, and they too seek automatic, online mech- anisms for pricing and allocating such reservations. In this paper to a fraction of its value for the reservation. Our main result is an online mechanism with many desir- able
NASA Astrophysics Data System (ADS)
Maldacena, Juan; Maoz, Liat
2004-02-01
We construct a few Euclidean supergravity solutions with multiple boundaries. We consider examples where the corresponding boundary field theory is well defined on each boundary. We point out that these configurations are puzzling from the AdS/CFT point of view. A proper understanding of the AdS/CFT dictionary for these cases might yield some information about the physics of closed universes.
Economics of spectrum allocation
NASA Astrophysics Data System (ADS)
Melody, W. H.
The effective and efficient allocation and use of the spectrum can be ensured only by a set of sharing rules that will reflect the interests, values, and power of all affected parties. What is now happening is that the new interests and different values of the developing countries are pressing to change the international sharing rules established by a small group of high-technology nations. It is noted that the latter have established a massive telecommunications infrastructure on the basis of inherited sharing rules that reflect only their interests and a much simplified scarcity problem. Once long-term goals and underlying principles of allocation are established, communication technologies and markets can be directed, through a series of adjustment policies, to achieve them. A crucial first step in the creation of an international information environment in which 'free' flows will be balanced flows is the establishment of a balanced and equitable set of sharing rules for the radio spectrum.
Online Matching with Stochastic Rewards Aranyak Mehta
Cortes, Corinna
to allocation problems in Internet advertising, crowd-sourcing, etc. In these real-world applications to users in crowd-sourcing (see e.g. [15], [19]). However, in many of these applications, the real that comes after the ad has been shown to the user. Similarly, a crowd-sourcing system has an estimate
Risk-adjusted budget allocation models with application in homeland security
Jian Hu; Tito Homem-de-Mello; Sanjay Mehrotra
2011-01-01
This article presents and studies models for multi-criteria budget allocation problems under uncertainty. The proposed models incorporate uncertainties in decision maker's weights using a robust weighted sum approach. The risk averseness of the decision maker in satisfying random risk-related constraints is ensured by using stochastic dominance. A sample average approximation approach together with a cutting surface method is used to
Resource Allocation in Fading Ad-Hoc Networks
Yousefi'zadeh, Homayoun
(t)Pi(t)Fii(t) Interferences from Lj's (i = j): Gij(t)Pj(t)Fij(t) Instantaneous SIR: SIRi(t) = Gii(t)Pi(t)Fii(t) j=i Gij.r.t. interferences Fij has unit mean Fij independent from Fi j fading slow w.r.t. symbol rate Avg. SIRi = E SIRi,s University of California, Irvine p.8/16 #12;3-State Markov-Chain State 1 State 2 State 3 p12 p
Online Prophet-Inequality Matching with Applications to Ad Allocation
Fiat, Amos
. hajiagha@cs.umd.edu Vahid Liaghat, University of Maryland at College Park. vliaghat@cs.umd.edu We study of Maryland at College Park. saeed@cs.umd.edu MohammadTaghi Hajiaghayi, University of Maryland at College Park of 1 - 1 k+3 where k is the minimum capacity. In case of k = 2, the algorithm gives a tight ratio of 1
Batch Mode Stochastic-Based Robust Dynamic Resource Allocation
Maciejewski, Anthony A. "Tony"
Jay Smith DigitalGlobe Longmont, CO, USA Email: jtsmith@digitalglobe.com Jonathan Apodaca, Anthony A-subscribed and tasks are subject to individual deadlines, i.e., the arrival rate of tasks is such that the system-0700559 and by the Colorado State University George T. Abell Endowment. collection of dedicated
Google's Auction for Radio and TV Ads Preliminary version
Cortes, Corinna
Google's Auction for Radio and TV Ads Preliminary version Noam Nisan Jason Bayer Deepak Chandra Tal Franji Robert Gardner Yossi Matias Neil Rhodes Misha Seltzer Danny Tom Hal Varian Dan Zigmond Google Inc. Abstract This document describes the auction system used by Google for allocation and pricing of TV ads
NASA Astrophysics Data System (ADS)
Weissmann, Haim; Shnerb, Nadav M.
2014-04-01
The process of desertification is usually modeled as a first-order transition, where a change of an external parameter (e.g., precipitation) leads to a catastrophic bifurcation followed by an ecological regime shift. However, vegetation elements like shrubs and trees undergo a stochastic birth-death process with an absorbing state; such a process supports a second-order continuous transition with no hysteresis. Here we study a minimal model of a first-order transition with an absorbing state. When the external parameter varies adiabatically the transition is indeed continuous, and we present some empirical evidence that supports this scenario. The front velocity renormalizes to zero at the extinction transition, leaving a finite “quantum” region where domain walls are stable and the desertification takes place via accumulation of local extinctions. A catastrophic regime shift may occur as a dynamical hysteresis, if the pace of environmental variations is too fast.
24 CFR 945.203 - Allocation plan.
Code of Federal Regulations, 2011 CFR
2011-04-01
...submission of an allocation plan, and “updated allocation plan” refers to the biennial...meetings held on the allocation plan (or updated plan) and any written comments received...approve an initial allocation plan, or updated allocation plan, if HUD determines...
24 CFR 945.203 - Allocation plan.
Code of Federal Regulations, 2014 CFR
2014-04-01
...submission of an allocation plan, and “updated allocation plan” refers to the biennial...meetings held on the allocation plan (or updated plan) and any written comments received...approve an initial allocation plan, or updated allocation plan, if HUD determines...
24 CFR 945.203 - Allocation plan.
Code of Federal Regulations, 2012 CFR
2012-04-01
...submission of an allocation plan, and “updated allocation plan” refers to the biennial...meetings held on the allocation plan (or updated plan) and any written comments received...approve an initial allocation plan, or updated allocation plan, if HUD determines...
24 CFR 945.203 - Allocation plan.
Code of Federal Regulations, 2013 CFR
2013-04-01
...submission of an allocation plan, and “updated allocation plan” refers to the biennial...meetings held on the allocation plan (or updated plan) and any written comments received...approve an initial allocation plan, or updated allocation plan, if HUD determines...
Advanced Topics in AI Task Allocation-Task Allocation -
Simulation League Agent Competition large scale disaster simulation simulators for earthquake, fire, q in nature -13- #12;Multi Agent System (MAS) -14- #12;Task Allocation a (basic) task allocation problem to reflect two criteria expected quality, e.g., map generated by a particular robot or number of victims
3739SPACE ALLOCATION/RE-ALLOCATION PROCEDURE Client identifies
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
Study on Stochastic Programming Methods Based on Synthesizing Effect
NASA Astrophysics Data System (ADS)
Li, Fachao; Liu, Xianlei; Jin, Chenxia
Stochastic programming is a well-known optimization problem in resource allocation, optimization decision etc. in this paper, by analyzing the essential characteristic of stochastic programming and the deficiencies of the existing methods, we propose the concept of synthesizing effect function for processing the objective function and constraints, and further we give an axiomatic system for synthesizing effect function. Finally, we establish a general solution model (denoted by BSE-SGM for short) based on synthesizing effect function for stochastic programming problem, and analyze the model through an example. All the results indicate that our method not only includes the existing methods for stochastic programming, but also effectively merge the decision preferences into the solution, so it can be widely used in many fields such as complicated system optimization and artificial intelligence etc.
Allocable costs What are they?
Massachusetts at Lowell, University of
Allocable costs What are they? The A-21 circular definition: a. A cost is allocable to a particular cost objective (i.e., a specific function, project, sponsored agreement, department, or the like) if the goods or services involved are chargeable or assignable to such cost objective in accordance
Aid Allocation and Fragile States
Mark McGillivray
2010-01-01
This paper summarises research on aid allocation and effectiveness, highlighting the current findings of recent research on aid allocation to fragile states. Fragile states are defined by the donor community as those with either critically poor policies or poorly performing institutions, or both. The paper examines the research findings in the broader context of research and analysis on how aid
Stochastic parameterization: is sophistication useful?
Plant, Robert
Stochastic parameterization: is sophistication useful? R. S. Plant and M. A. Whitall Department constraints should control the character of the stochastic tendencies? Stochastic parameterization ensemble average 3. the model grid box size Stochastic parameterization: is sophistication useful? p.2
Winston, A.W.
1987-06-23
A system is described for allocating energy usage among heat exchange terminals. Each comprises heat exchanger means and electrically driven motor means including electrical controls for controlling the operating state of the motor means. The motor means is operable at least one discrete operating speed. So that the motor means may be turned off, the system comprises: individual monitoring means each coupled to a respective one of the motor means for monitoring the operating state of each of the motor means, providing a different electrical data signal for each operating state; each of the monitoring means associated with a unique address code; central control means; means providing electrical communication between each of the monitoring means and the control means; the control means including means for sending signals cyclically polling each of the monitoring means at its unique address code to provide back, electrical data signals indicating the operating state of each motor means associated with the polled monitoring means.
Albacete, Javier L. [ECT, Strada delle Tabarelle 286, I-38050, Villazzano (Tunisia) (Italy); Kovchegov, Yuri V.; Taliotis, Anastasios [Department of Physics, Ohio State University, Columbus, OH 43210 (United States)
2009-03-23
We calculate the total cross section for the scattering of a quark-anti-quark dipole on a large nucleus at high energy for a strongly coupled N = 4 super Yang-Mills theory using AdS/CFT correspondence. We model the nucleus by a metric of a shock wave in AdS{sub 5}. We then calculate the expectation value of the Wilson loop (the dipole) by finding the extrema of the Nambu-Goto action for an open string attached to the quark and antiquark lines of the loop in the background of an AdS{sub 5} shock wave. We find two physically meaningful extremal string configurations. For both solutions we obtain the forward scattering amplitude N for the quark dipole-nucleus scattering. We study the onset of unitarity with increasing center-of-mass energy and transverse size of the dipole: we observe that for both solutions the saturation scale Q{sub s} is independent of energy/Bjorken-x and depends on the atomic number of the nucleus as Q{sub s}{approx}A{sup 1/3}. Finally we observe that while one of the solutions we found corresponds to the pomeron intercept of {alpha}{sub P} = 2 found earlier in the literature, when extended to higher energy or larger dipole sizes it violates the black disk limit. The other solution we found respects the black disk limit and yields the pomeron intercept of {alpha}{sub P} = 1.5. We thus conjecture that the right pomeron intercept in gauge theories at strong coupling may be {alpha}{sub P} = 1.5.
Javad Sharifi; Hamidreza Momeni
2009-07-20
the stability criterion is constructed for open quantum systems which govern by quantum stochastic differential equations (QSDE) both for quantum observable flow and the stochastic density operator. We derive stability criteria (local, asymptotic and exponential stability) for those QSDE.
STOCHASTIC CONTROL NAFTALI HARRIS
May, J. Peter
STOCHASTIC CONTROL NAFTALI HARRIS Abstract. In this paper we discuss the Stochastic Control Problem wish to fly an airplane through turbulence, or manage a stock portfolio, or precisely maintain the Stochastic Control Problem formally. Finally, we will spend the latter half of this paper proving necessary
Stochastic amplification in epidemics
McKane, Alan
REPORT Stochastic amplification in epidemics David Alonso1, *, Alan J. McKane2 and Mercedes Pascual of Manchester, Manchester M13 9PL, UK The role of stochasticity and its interplay with nonlinearity are central, we present a stochastic theory for the major dynamical transitions in epidemics from regular
Vladimir Dzhunushaliev
2010-08-19
Stochastic Einstein equations are considered when 3D space metric $\\gamma_{ij}$ are stochastic functions. The probability density for the stochastic quantities is connected with the Perelman's entropy functional. As an example, the Friedman Universe is considered. It is shown that for the Friedman Universe the dynamical evolution is not changed. The connection between general relativity and Ricci flows is discussed.
Resource allocation using risk analysis
Bott, T. F.; Eisenhawer, S. W.
2003-01-01
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.
Dynamic Memory Allocation Deallocation using
Harman, Mark
Modelling Dynamic Memory Allocation and Deallocation using Amorphous Slicing by Yoga Sivagurunathan. The DMM is a simpli ed version of the original program which is concerned solely with dynamic memory
Collective credit allocation in science
Shen, Hua-Wei
2014-01-01
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, since 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...
Evolution and Ecology of Sex Allocation
West, Stuart
Evolution and Ecology of Sex Allocation Sarah E Reece Submitted for the Degree of Doctor. Consequently, females are expected to allocate their resources to the production of sons and daughters (sex allocation) in such a way as to maximise their fitness. The field of sex allocation consists of a large body
Conference structures and fair allocation rules
R. B. Myerson
1980-01-01
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
Khem R. Sharma; PingSun Leung; Halina M. Zaleski
1999-01-01
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.
Stochastic resonance in nanomechanical systems
NASA Astrophysics Data System (ADS)
Badzey, Robert L.
The phenomenon of stochastic resonance is a counter-intuitive one: adding noise to a noisy nonlinear system under the influence of a modulation results in coherent behavior. The signature of the effect is a resonance in the signal-to-noise ratio of the response over a certain range of noise power; this behavior is absent if either the modulation or the noise are absent. Stochastic resonance has attracted considerable interest over the past several decades, having been seen in a great number of physical and biological systems. Here, observation of stochastic resonance is reported for nanomechanical systems consisting of a doubly-clamped beam resonators fabricated from single-crystal silicon. Such oscillators have been found to display nonlinear and bistable behavior under the influence of large driving forces. This bistability is exploited to produce a controllable nanomechanical switch, a device that may be used as the basis for a new generation of computational memory elements. These oscillators possess large intrinsic resonance frequencies (MHz range or higher) due to their small size and relatively high stiffness; thus they have the potential to rival the current state-of-the-art of electronic and magnetic storage technologies. This small size also allows them to be packed in densities which meet or exceed the superparamagnetic limit for magnetic storage media of 100 GB/in2. Two different doubly-clamped beams were cooled to low temperatures (300 mK--4 K), and excited with a magnetomotive technique. They were driven into the nonlinear response regime, and then modulated to induce switching between their bistable states. When the modulation was reduced, the switching died out. Application of noise, either with an external broadband source or via an increase in temperature, resulted in a distinct resonance in the signal-to-noise ratio. Aside from establishing the phenomenon of stochastic resonance in yet another physical system, the observation of this effect has more far-reaching consequences. Stochastic resonance may very well play an important role in signal processing for these and similar memory elements. The low temperatures attained for these experiments open up the possibility of exploring quantum stochastic resonance, and the ability of noise to aid in the development and manipulation of quantum information.
Kuznetsova, Olga M; Tymofyeyev, Yevgen
2012-04-13
The demand for unequal allocation in clinical trials is growing. Most commonly, the unequal allocation is achieved through permuted block randomization. However, other allocation procedures might be required to better approximate the allocation ratio in small samples, reduce the selection bias in open-label studies, or balance on baseline covariates. When these allocation procedures are generalized to unequal allocation, special care is to be taken to preserve the allocation ratio at every allocation step. This paper offers a way to expand the biased coin randomization to unequal allocation that preserves the allocation ratio at every allocation. The suggested expansion works with biased coin randomization that balances only on treatment group totals and with covariate-adaptive procedures that use a random biased coin element at every allocation. Balancing properties of the allocation ratio preserving biased coin randomization and minimization are described through simulations. It is demonstrated that these procedures are asymptotically protected against the shift in the rerandomization distribution identified for some examples of minimization with 1:2 allocation. The asymptotic shift in the rerandomization distribution of the difference in treatment means for an arbitrary unequal allocation procedure is explicitly derived in the paper. PMID:22161821
STOCHASTIC QUASI-NEWTON METHODS FOR NONCONVEX STOCHASTIC OPTIMIZATION
Ferguson, Thomas S.
STOCHASTIC QUASI-NEWTON METHODS FOR NONCONVEX STOCHASTIC OPTIMIZATION XIAO WANG , SHIQIAN MA , AND WEI LIU December 1, 2014 Abstract. In this paper we study stochastic quasi-Newton methods for nonconvex stochastic optimization, where we assume that only stochastic information of the gradients
Stochastic Differential Dynamic Logic for Stochastic Hybrid Programs
Stochastic Differential Dynamic Logic for Stochastic Hybrid Programs Andr´e Platzer April 2011 CMU of this report has appeared at CADE [Pla11]. #12;Keywords: Dynamic logic, proof calculus, stochastic differential equations, stochastic hybrid systems, stochastic processes, compositional verification #12;Abstract Logic
Task allocation in a distributed computing system
NASA Technical Reports Server (NTRS)
Seward, Walter D.
1987-01-01
A conceptual framework is examined for task allocation in distributed systems. Application and computing system parameters critical to task allocation decision processes are discussed. Task allocation techniques are addressed which focus on achieving a balance in the load distribution among the system's processors. Equalization of computing load among the processing elements is the goal. Examples of system performance are presented for specific applications. Both static and dynamic allocation of tasks are considered and system performance is evaluated using different task allocation methodologies.
The appreciation of stochastic motion in particle accelerators
Symon, Keith; Sessler, Andrew
2003-08-03
A description is given of the analytic and numerical work, performed from July 1955 through August 1956, so as to develop, and then study, the process of making intense proton beams, suitable for colliding beams. It is shown how this investigation led, in a most natural way, to the realization that stochasticity can arise in a simple Hamiltonian system. Furthermore, the criterion for the onset of stochasticity was understood, and carefully studied, in two different situations. The first situation was the proposed (and subsequently used) ''stacking process'' for developing an intense beam, where stochasticity occurs as additional particles are added to the intense circulating beam. The second situation occurs when one seeks to develop ''stochastic accelerators'' in which particles are accelerated (continuously) by a collection of radio frequency systems. It was in the last connection that the well-known criterion for stochasticity, resonance overlap, was obtained.
Collaborative Resource Allocation
NASA Technical Reports Server (NTRS)
Wang, Yeou-Fang; Wax, Allan; Lam, Raymond; Baldwin, John; Borden, Chester
2007-01-01
Collaborative Resource Allocation Networking Environment (CRANE) Version 0.5 is a prototype created to prove the newest concept of using a distributed environment to schedule Deep Space Network (DSN) antenna times in a collaborative fashion. This program is for all space-flight and terrestrial science project users and DSN schedulers to perform scheduling activities and conflict resolution, both synchronously and asynchronously. Project schedulers can, for the first time, participate directly in scheduling their tracking times into the official DSN schedule, and negotiate directly with other projects in an integrated scheduling system. A master schedule covers long-range, mid-range, near-real-time, and real-time scheduling time frames all in one, rather than the current method of separate functions that are supported by different processes and tools. CRANE also provides private workspaces (both dynamic and static), data sharing, scenario management, user control, rapid messaging (based on Java Message Service), data/time synchronization, workflow management, notification (including emails), conflict checking, and a linkage to a schedule generation engine. The data structure with corresponding database design combines object trees with multiple associated mortal instances and relational database to provide unprecedented traceability and simplify the existing DSN XML schedule representation. These technologies are used to provide traceability, schedule negotiation, conflict resolution, and load forecasting from real-time operations to long-range loading analysis up to 20 years in the future. CRANE includes a database, a stored procedure layer, an agent-based middle tier, a Web service wrapper, a Windows Integrated Analysis Environment (IAE), a Java application, and a Web page interface.
Inverse Statistics and Asset Allocation Efficiency
NASA Astrophysics Data System (ADS)
Bolgorian, Meysam
In this paper using inverse statistics analysis, the effect of investment horizon on the efficiency of portfolio selection is examined. Inverse statistics analysis is a general tool also known as probability distribution of exit time that is used for detecting the distribution of the time in which a stochastic process exits from a zone. This analysis was used in Refs. 1 and 2 for studying the financial returns time series. This distribution provides an optimal investment horizon which determines the most likely horizon for gaining a specific return. Using samples of stocks from Tehran Stock Exchange (TSE) as an emerging market and S&P 500 as a developed market, effect of optimal investment horizon in asset allocation is assessed. It is found that taking into account the optimal investment horizon in TSE leads to more efficiency for large size portfolios while for stocks selected from S&P 500, regardless of portfolio size, this strategy does not only not produce more efficient portfolios, but also longer investment horizons provides more efficiency.
Quantum stochastic convolution cocycles
NASA Astrophysics Data System (ADS)
Skalski, Adam
2006-08-01
A concept of quantum stochastic convolution cocycle is introduced and studied in two different contexts -- purely algebraic and operator space theoretic. A quantum stochastic convolution cocycle is a quantum stochastic process on a coalgebra satisfying the convolution cocycle relation and the initial condition given by the counit. The notion generalises that of quantum Levy process, which in turn is a noncommutative probability counterpart of classical Levy process on a group. Convolution cocycles arise as solutions of quantum stochastic differential equations. In turn every sufficiently regular cocycle satisfies an equation of that type. This is proved along with the corresponding existence and uniqueness of solutions for coalgebraic quantum stochastic differential equations. The stochastic generators of unital *-homomorphic cocycles are characterised in terms of structure maps on a *-bialgebra. This yields a simple proof of the Schurmann Reconstruction Theorem for a quantum Levy process; it also yields a topological version for a quantum Levy process on a C*-bialgebra. Precise characterisation of the stochastic generators of completely positive and contractive quantum stochastic convolution cocycles in the C*-algebraic context is given, leading to some dilation results. A few examples are presented and some interpretations offered for quantum stochastic convolution cocycles and their stochastic generators on different types of *-bialgebra.
NASA Astrophysics Data System (ADS)
Anninos, Dionysios; Li, Wei; Padi, Megha; Song, Wei; Strominger, Andrew
2009-03-01
Three dimensional topologically massive gravity (TMG) with a negative cosmological constant -l-2 and positive Newton constant G admits an AdS3 vacuum solution for any value of the graviton mass ?. These are all known to be perturbatively unstable except at the recently explored chiral point ?l = 1. However we show herein that for every value of ?l ? 3 there are two other (potentially stable) vacuum solutions given by SL(2,Bbb R) × U(1)-invariant warped AdS3 geometries, with a timelike or spacelike U(1) isometry. Critical behavior occurs at ?l = 3, where the warping transitions from a stretching to a squashing, and there are a pair of warped solutions with a null U(1) isometry. For ?l > 3, there are known warped black hole solutions which are asymptotic to warped AdS3. We show that these black holes are discrete quotients of warped AdS3 just as BTZ black holes are discrete quotients of ordinary AdS3. Moreover new solutions of this type, relevant to any theory with warped AdS3 solutions, are exhibited. Finally we note that the black hole thermodynamics is consistent with the hypothesis that, for ?l > 3, the warped AdS3 ground state of TMG is holographically dual to a 2D boundary CFT with central charges c_R-formula and c_L-formula.
NASA Astrophysics Data System (ADS)
Song, Wei; Anninos, Dionysios; Li, Wei; Padi, Megha; Strominger, Andrew
2009-03-01
Three dimensional topologically massive gravity (TMG) with a negative cosmological constant -ell-2 and positive Newton constant G admits an AdS3 vacuum solution for any value of the graviton mass ?. These are all known to be perturbatively unstable except at the recently explored chiral point ?ell = 1. However we show herein that for every value of ?ell ? 3 there are two other (potentially stable) vacuum solutions given by SL(2,Bbb R) × U(1)-invariant warped AdS3 geometries, with a timelike or spacelike U(1) isometry. Critical behavior occurs at ?ell = 3, where the warping transitions from a stretching to a squashing, and there are a pair of warped solutions with a null U(1) isometry. For ?ell > 3, there are known warped black hole solutions which are asymptotic to warped AdS3. We show that these black holes are discrete quotients of warped AdS3 just as BTZ black holes are discrete quotients of ordinary AdS3. Moreover new solutions of this type, relevant to any theory with warped AdS3 solutions, are exhibited. Finally we note that the black hole thermodynamics is consistent with the hypothesis that, for ?ell > 3, the warped AdS3 ground state of TMG is holographically dual to a 2D boundary CFT with central charges c_R-formula and c_L-formula.
Stochastic String Motion Above and Below the World Sheet Horizon
Jorge Casalderrey-Solana; Keun-Young Kim; Derek Teaney
2010-03-31
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 $\\sqrt{\\gamma}$.
Stochastic String Motion Above and Below the World Sheet Horizon
Casalderrey-Solana, Jorge; Teaney, Derek
2009-01-01
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 $\\sqrt{\\gamma}$.
Stochastic volatility models and Kelvin waves
NASA Astrophysics Data System (ADS)
Lipton, Alex; Sepp, Artur
2008-08-01
We use stochastic volatility models to describe the evolution of an asset price, its instantaneous volatility and its realized volatility. In particular, we concentrate on the Stein and Stein model (SSM) (1991) for the stochastic asset volatility and the Heston model (HM) (1993) for the stochastic asset variance. By construction, the volatility is not sign definite in SSM and is non-negative in HM. It is well known that both models produce closed-form expressions for the prices of vanilla option via the Lewis-Lipton formula. However, the numerical pricing of exotic options by means of the finite difference and Monte Carlo methods is much more complex for HM than for SSM. Until now, this complexity was considered to be an acceptable price to pay for ensuring that the asset volatility is non-negative. We argue that having negative stochastic volatility is a psychological rather than financial or mathematical problem, and advocate using SSM rather than HM in most applications. We extend SSM by adding volatility jumps and obtain a closed-form expression for the density of the asset price and its realized volatility. We also show that the current method of choice for solving pricing problems with stochastic volatility (via the affine ansatz for the Fourier-transformed density function) can be traced back to the Kelvin method designed in the 19th century for studying wave motion problems arising in fluid dynamics.
Magnetic Brane Solutions in AdS
Eric D'Hoker; Per Kraus
2010-04-04
We construct asymptotically AdS_5 solutions of Einstein-Maxwell theory dual to N=4 SYM theory on R^{3,1} in the presence of a background magnetic field. The solutions interpolate between AdS_5 and a near horizon AdS_3\\times T^2. The central charge of the near horizon region, and hence low temperature entropy of the solution, is found to be \\sqrt{4\\over 3} times that of free N=4 SYM theory. The entropy vanishes at zero temperature. We also present the generalization of these solutions to arbitrary spacetime dimensionality.
Task allocation among multiple intelligent robots
NASA Technical Reports Server (NTRS)
Gasser, L.; Bekey, G.
1987-01-01
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.
Introduction to stochastic cooling
van der Meer, S.
1987-02-26
The principles of stochastic cooling will be discussed with the emphasis on a qualitative explanation of the most interesting points, such as -how to circumvent Liouville's theorem -time domain and frequency domain viewpoint and their correspondence (mixing, beam feedback) -betatron cooling and momentum cooling; how filters are used to improve momentum cooling -stochastic stacking -how to make wide-band pick-ups and kickers -future developments -electron cooling vs stochastic cooling
Stochastic Pairwise Alignments Ulrike Mucksteina
Stadler, Peter F.
Stochastic Pairwise Alignments Ulrike MÂ¨ucksteina , Ivo L. Hofackera, , and Peter F. Stadlera between structure based alignments and large samples of stochastic alignments shows that the ensemble significantly from the structural alignment. Ensembles of suboptimal alignments obtained by stochastic
New Solution Methods for Joint Chance-Constrained Stochastic Programs with Random Left-Hand Sides
Tanner, Matthew W.
2010-01-16
of this dissertation details an application of joint chance-constrained stochastic programs to a vaccination allocation problem. We show why it is necessary to formulate the problem with random parameters and also why chance-constraints are a good framework for de...
Stochastic Programming Approach to Hydraulic Fracture Design for the Lower Tertiary Gulf of Mexico
Podhoretz, Seth
2013-07-27
....................................... 47 Finite Conductivity Fracture Approximation ..................................... 52 Proppant Allocation in Multilayer Reservoirs .................................... 53 vi IV STOCHASTIC OPTIMIZATION.... ................................................................... 51 3.4 Vertical fracture, dimensionless productivity. .......................................... 53 3.5 Productivity index vs. ratio of proppant numbers. ..................................... 56 4.1 DVS schematic...
MRI-image based radiotherapy treatment optimization of brain tumours using stochastic approach
Mishra, Prabhat
, either with the help of a medical practitioner or with the help of basic tumor detection algorithms stochastic activation technique for cellular allocation as Monte-Carlo technique. After the cellular tissual by [3,4,5] to visualize both the internal and external structure of a dynamic tumour. Wasserman
Sutcliffe, Paul [Department of Mathematical Sciences, Durham University, Durham DH1 3LE (United Kingdom)
2011-09-22
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.
Optimal allocation of inspection resources
Markin, J.T.; Chambers, W.H.; Vaccaro, H.S.
1984-01-01
Allocation of inspection resources for international safeguards is considered as the problem of designing a complex system that is composed of individual inspection activities and that has the objective of detecting material loss. Optimization theory is applied in selecting those inspection activities that maximize a system performance measure within resource constraints. The method is applicable to a global allocation problem in which inspection resources are distributed throughout a hierarchy consisting of multiple countries, multiple facilities within each country, and multiple activities within each facility. 9 references.
Software For Allocation Of Tolerances
NASA Technical Reports Server (NTRS)
Fernandez, Ken; Raman, Shivakumar; Pulat, Simin
1992-01-01
Collection of computer programs being developed to assist engineers in allocating tolerances to dimensions of components and assemblies. System reflects tolerancing expertise of design and manufacturing engineers; helps engineers maintain comprehensive tolerancing policy and overview that might otherwise get lost when attending to details of design and manufacturing processes. Necessary to allocate tolerances for three main reasons: tolerances allow for variations in dimensions of components as manufactured; assembly of two or more components, dimensions lie between specified limits; and part replaced must fit in place.
Estimation and comparison of parameters in stochastic growth models for barn owls
G. C. White; I. L. Jr. Brisbin
1980-01-01
Alternative methods for parameter estimation and the incorporation of stochasticity into growth models are investigated and compared to the commonly used sampling error model in which error terms are simply added-on to the integrated form of growth equation. A process error model, in which the process of growth is assumed to have stochastic variation or error incorporated within it, was
Institute for Software Technology Ad anced RoboticsAdvanced Robotics
and Properties of Multi-Agent Systems (MAS)(MAS) · Communication in MAS T k All ti· Task Allocation · Game Theory ? actions Gerald Steinbauer 7 Advanced Robotics Multi-Agent Systems/Communication actuators #12;InstituteInstitute for Software Technology Ad anced RoboticsAdvanced Robotics Multi-Agent Systems/Communication
Karmperis, Athanasios C.; Aravossis, Konstantinos; Tatsiopoulos, Ilias P.; Sotirchos, Anastasios
2012-01-01
The fair division of a surplus is one of the most widely examined problems. This paper focuses on bargaining problems with fixed disagreement payoffs where risk-neutral agents have reached an agreement that is the Nash-bargaining solution (NBS). We consider a stochastic environment, in which the overall return consists of multiple pies with uncertain sizes and we examine how these pies can be allocated with fairness among agents. Specifically, fairness is based on the Aristotle’s maxim: “equals should be treated equally and unequals unequally, in proportion to the relevant inequality”. In this context, fairness is achieved when all the individual stochastic surplus shares which are allocated to agents are distributed in proportion to the NBS. We introduce a novel algorithm, which can be used to compute the ratio of each pie that should be allocated to each agent, in order to ensure fairness within a symmetric or asymmetric NBS. PMID:23024752
Code of Federal Regulations, 2010 CFR
2010-10-01
...is divided into limited entry and open access fisheries. Separate allocations for the limited entry and open access fisheries will be established...fisheries) minus the allocation to the open access fishery. (2) Open access...
Fair resource allocation in multiple access channels
ParandehGheibi, Ali
2008-01-01
We consider the problem of resource allocation in a multiple access channel. Our objective is to obtain rate and power allocation policies that maximize a general concave utility function of average transmission rates over ...
A Stochastic Employment Problem
ERIC Educational Resources Information Center
Wu, Teng
2013-01-01
The Stochastic Employment Problem(SEP) is a variation of the Stochastic Assignment Problem which analyzes the scenario that one assigns balls into boxes. Balls arrive sequentially with each one having a binary vector X = (X[subscript 1], X[subscript 2],...,X[subscript n]) attached, with the interpretation being that if X[subscript i] = 1 the ball…
Instantaneous stochastic perturbation theory
Martin Lüscher
2014-12-17
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.
Amplification by stochastic interference
K. Svozil; D. Felix; K. Ehrenberger
2002-11-19
A new method is introduced to obtain a strong signal by the interference of weak signals in noisy channels. The method is based on the interference of 1/f noise from parallel channels. One realization of stochastic interference is the auditory nervous system. Stochastic interference may have broad potential applications in the information transmission by parallel noisy channels.
Simon Hochgerner
2010-02-10
We mimic the stochastic Hamiltonian reduction of Lazaro-Cami and Ortega [17, 18] for the case of certain non-holonomic systems with symmetries. Using the non-holonomic connection it is shown that the drift of the stochastically perturbed $n$-dimensional Chaplygin ball is a certain gradient of the density of the preserved measure of the deterministic system.
Stochastic Convection Parameterizations
NASA Technical Reports Server (NTRS)
Teixeira, Joao; Reynolds, Carolyn; Suselj, Kay; Matheou, Georgios
2012-01-01
computational fluid dynamics, radiation, clouds, turbulence, convection, gravity waves, surface interaction, radiation interaction, cloud and aerosol microphysics, complexity (vegetation, biogeochemistry, radiation versus turbulence/convection stochastic approach, non-linearities, Monte Carlo, high resolutions, large-Eddy Simulations, cloud structure, plumes, saturation in tropics, forecasting, parameterizations, stochastic, radiation-clod interaction, hurricane forecasts
Optimal Vaccination in a Stochastic Epidemic Model of Two Non-Interacting Populations
Yuan, Edwin C.; Alderson, David L.; Stromberg, Sean; Carlson, Jean M.
2015-01-01
Developing robust, quantitative methods to optimize resource allocations in response to epidemics has the potential to save lives and minimize health care costs. In this paper, we develop and apply a computationally efficient algorithm that enables us to calculate the complete probability distribution for the final epidemic size in a stochastic Susceptible-Infected-Recovered (SIR) model. Based on these results, we determine the optimal allocations of a limited quantity of vaccine between two non-interacting populations. We compare the stochastic solution to results obtained for the traditional, deterministic SIR model. For intermediate quantities of vaccine, the deterministic model is a poor estimate of the optimal strategy for the more realistic, stochastic case. PMID:25688857
Allocation of attention across saccades.
Jonikaitis, Donatas; Szinte, Martin; Rolfs, Martin; Cavanagh, Patrick
2013-03-01
Whenever the eyes move, spatial attention must keep track of the locations of targets as they shift on the retina. This study investigated transsaccadic updating of visual attention to cued targets. While observers prepared a saccade, we flashed an irrelevant, but salient, color cue in their visual periphery and measured the allocation of spatial attention before and after the saccade using a tilt discrimination task. We found that just before the saccade, attention was allocated to the cue's future retinal location, its predictively "remapped" location. Attention was sustained at the cue's location in the world across the saccade, despite the change of retinal position whereas it decayed quickly at the retinal location of the cue, after the eye landed. By extinguishing the color cue across the saccade, we further demonstrate that the visual system relies only on predictive allocation of spatial attention, as the presence of the cue after the saccade did not substantially affect attentional allocation. These behavioral results support and extend physiological evidence showing predictive activation of visual neurons when an attended stimulus will fall in their receptive field after a saccade. Our results show that tracking of spatial locations across saccades is a plausible consequence of physiological remapping. PMID:23221410
Planning and Resource Allocation Management.
ERIC Educational Resources Information Center
Coleman, Jack W.
1986-01-01
Modern scientific management techniques provide college administrators with valuable planning and resource allocation insights and enhances the decision process. The planning model should incorporate assessment, strategic planning, dynamic and long-term budgeting, operational planning, and feedback and control for actual operations. (MSE)
Operational risk economic capital allocation
NASA Astrophysics Data System (ADS)
Nikonov, Oleg I.; Vlasov, Vladimir E.; Medvedeva, Marina A.
2013-10-01
In the paper we describe a model of operational risk of economic capital estimation and allocation based on Loss Distribution Approach (LDA). Bank's total losses are modeled through Monte-Carlo simulations of its business units' losses. It allows to fairly distributing the corresponding capital between business units in order to assess and manage their risk adjusted performance.
Regulating nutrient allocation in plants
Udvardi, Michael; Yang, Jiading; Worley, Eric
2014-12-09
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.
Report on Tribal Priority Allocations.
ERIC Educational Resources Information Center
Bureau of Indian Affairs (Dept. of Interior), Washington, DC.
As part of Bureau of Indian Affairs (BIA) funding, Tribal Priority Allocations (TPA) are the principal source of funds for tribal governments and agency offices at the reservation level. According to their unique needs and circumstances, tribes may prioritize funding among eight general categories: government, human services, education, public…
Social evolution sex allocation theory
West, Stuart
Social evolution and sex allocation theory Submitted for the Degree of Doctor 8 Chapter 2. Sex and Death: the Effects of Innate Immune Factors on the Sexual Reproduction Literature Cited 213 Appendix 227 #12; 3 Declaration This work has been composed by me, is the result
Administrators' Decisions about Resource Allocation
ERIC Educational Resources Information Center
Knight, William E.; Folkins, John W.; Hakel, Milton D.; Kennell, Richard P.
2011-01-01
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…
Classification of capacitor allocation techniques
H. N. Ng; M. M. A. Salama; A. Y. Chikhani
2000-01-01
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
28 CFR 100.14 - Directly allocable costs.
Code of Federal Regulations, 2010 CFR
2010-07-01
...includable in an allocable cost base should bear a pro rata share of allocable costs irrespective of their acceptance...method of allocating allocable costs shall be in accordance with the accounting principles used by the carrier in...
26 CFR 1.141-6 - Allocation and accounting rules.
Code of Federal Regulations, 2010 CFR
2010-04-01
...2010-04-01 false Allocation and accounting rules. 1.141-6 Section...141-6 Allocation and accounting rules. (a) Allocation...reasonable, consistently applied accounting method, and allocations...bonds. [Reserved] (f) Treatment of partnerships....
Expectations for Household Task Allocation and Actual Task Allocation: A New Zealand Study.
ERIC Educational Resources Information Center
Koopman-Boyden, Peggy G.; Abbott, Max
1985-01-01
Compares engaged couples' expected gender-role differentiation of labor in marriage with their actual household task allocation one year after marriage. The acceptance of feminist ideology was the dominant predictor of household task allocation for both males and females. Parental household task allocation did not predict task allocation.…
Evolution with Stochastic Fitness and Stochastic Migration
Rice, Sean H.; Papadopoulos, Anthony
2009-01-01
Background Migration between local populations plays an important role in evolution - influencing local adaptation, speciation, extinction, and the maintenance of genetic variation. Like other evolutionary mechanisms, migration is a stochastic process, involving both random and deterministic elements. Many models of evolution have incorporated migration, but these have all been based on simplifying assumptions, such as low migration rate, weak selection, or large population size. We thus have no truly general and exact mathematical description of evolution that incorporates migration. Methodology/Principal Findings We derive an exact equation for directional evolution, essentially a stochastic Price equation with migration, that encompasses all processes, both deterministic and stochastic, contributing to directional change in an open population. Using this result, we show that increasing the variance in migration rates reduces the impact of migration relative to selection. This means that models that treat migration as a single parameter tend to be biassed - overestimating the relative impact of immigration. We further show that selection and migration interact in complex ways, one result being that a strategy for which fitness is negatively correlated with migration rates (high fitness when migration is low) will tend to increase in frequency, even if it has lower mean fitness than do other strategies. Finally, we derive an equation for the effective migration rate, which allows some of the complex stochastic processes that we identify to be incorporated into models with a single migration parameter. Conclusions/Significance As has previously been shown with selection, the role of migration in evolution is determined by the entire distributions of immigration and emigration rates, not just by the mean values. The interactions of stochastic migration with stochastic selection produce evolutionary processes that are invisible to deterministic evolutionary theory. PMID:19816580
Reduction of Stochastic Parity to Stochastic Mean-payoff Games
Henzinger, Thomas A.
, Stochastic games, Parity objectives, Mean- payoff objectives. 1 Introduction Graph games. A stochastic graph game; otherwise, as a 21/2-player graph game. Parity objectives. The theory of graph gamesReduction of Stochastic Parity to Stochastic Mean-payoff Games Krishnendu Chatterjee1 and Thomas A
Stochastic Differential Dynamic Logic for Stochastic Hybrid Programs
Platzer, André
Stochastic Differential Dynamic Logic for Stochastic Hybrid Programs Andr´e Platzer Carnegie Mellon, hybrid systems, and distributed systems. Some applications also have a stochastic behav- ior, however chronically underdeveloped in the context of stochastic hybrid systems, i.e., systems with interacting
ROBUST RESOURCE ALLOCATION IN HETEROGENEOUS PARALLEL
Maciejewski, Anthony A. "Tony"
. Often, task resource requirements lead to inconsistent ROBUST RESOURCE ALLOCATION IN HETEROGENEOUS that machine 1 is uniformly faster on all tasks. Resource allocation in heterogeneous parallel and dis for problems of realistic size). Therefore, the task of resource allocation is often addressed heuristically
Multiattribute Decision Making by Sequential Resource Allocation
Oren, Shmuel S.
is elicited from the decision- maker by converting itto a simple resource allocation task that may be solved by inspection. Our experience indicates that these resource allocation tasks are considerably simpler and moreMultiattribute Decision Making by Sequential Resource Allocation PETER A. MORRIS Applied Decision
Online Resource Allocation Problems Patrick Jaillet
Jaillet, Patrick
Online Resource Allocation Problems Patrick Jaillet Xin Lu§ January 2011 Abstract In this paper, we consider an online resource allocation problem, where buyers with limited budgets are interested on instances. Here, we consider an online resource allocation problem, whose introduction is motivated in part
45 CFR 304.15 - Cost allocation.
Code of Federal Regulations, 2010 CFR
2010-10-01
...2010-10-01 2010-10-01 false Cost allocation. 304.15 Section...AND HUMAN SERVICES FEDERAL FINANCIAL PARTICIPATION § 304.15 Cost allocation. A State agency...Security Act must have an approved cost allocation plan on...
Code of Federal Regulations, 2013 CFR
2013-10-01
...allocation to the nonwhiting fishery. (B) Pacific Ocean Perch (POP). Allocate 17 percent or 30 mt, whichever is greater...combined). The distribution of the whiting trawl allocation of POP to each sector (MS, C/P, and IFQ) will be done pro...
Code of Federal Regulations, 2012 CFR
2012-10-01
...allocation to the nonwhiting fishery. (B) Pacific Ocean Perch (POP). Allocate 17 percent or 30 mt, whichever is greater...combined). The distribution of the whiting trawl allocation of POP to each sector (MS, C/P, and IFQ) will be done pro...
Code of Federal Regulations, 2014 CFR
2014-10-01
...allocation to the nonwhiting fishery. (B) Pacific Ocean Perch (POP). Allocate 17 percent or 30 mt, whichever is greater...combined). The distribution of the whiting trawl allocation of POP to each sector (MS, C/P, and IFQ) will be done pro...
ACOMBINATORIALAPPROXIMATIONALGORITHM FOR CDMA DOWNLINK RATE ALLOCATION
Boucherie, Richard J.
Chapter 1 ACOMBINATORIALAPPROXIMATIONALGORITHM FOR CDMA DOWNLINK RATE ALLOCATION R.J. Boucherie1, A rate allocation in Code Division Multiple Access (CDMA) mobile networks. By discretizing the coverage, is maximized. Keywords: CDMA, feasibility transmit power, downlink rate allocation, multiple-choice knapsack
Book Review Sex Allocation. Stuart West.
West, Stuart
by briefly discussing landmark contributions that have been critical for sex allocation research (e.g., work work, to highlight how studies of sex allocation can address broader questions in evolutionary biologyBook Review Sex Allocation. Stuart West. Princeton, NJ: Princeton University Press, 2009. xii þ 466
"Compute Process Allocator (CPA)" 1. Submitting Organization
Siefert, Chris
#12;"Compute Process Allocator (CPA)" 1. Submitting Organization Sandia National Laboratories P Name Compute Process Allocator (CPA) 4. Description of Entry CPA is the first allocator to balance prototype development, the CPA was licensed to Cray Inc. in June 2005. 6. Inventor or Principal Developer
Internal Markets for Supply Chain Capacity Allocation
Internal Markets for Supply Chain Capacity Allocation David McAdams and Thomas W. Malone Sloan David McAdams & Thomas Malone #12;Internal Markets for Supply Chain Capacity Allocation David Mc allocation problems using internal markets among employees of the same company. Unlike earlier forms
Boat Allocations, Football Inspections, Cargo Handling, and
for different missions 8 #12;Boat Allocation Module Project · Overall Project Goal: Ø Design and implementBoat Allocations, Football Inspections, Cargo Handling, and Nuclear Detection with Taxis: Examples ·Allocation of USCG Boats to Boat Stations ·Sports Stadium Security ·Container Inspection at Ports ·Nuclear
Alejandra Castro; Wei Song
2014-11-07
We revisit some properties of AdS$_2$ Einstein-Maxwell gravity with the aim of reconciling apparently conflicting results in prior literature. We show that the two dimensional theory can be obtained as a dimensional reduction of the three dimensional Einstein gravity with the CSS boundary condition. In general, this theory on AdS$_2$ can be viewed as an effective theory of the near horizon geometry of a (near-)extremal black hole. We provide an interpretation of our results in terms of the microscopic description of an extremal black hole.
Dynamic resource allocation in disaster response: tradeoffs in wildfire suppression.
Petrovic, Nada; Alderson, David L; Carlson, Jean M
2012-01-01
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
Stochastic trajectories of succession initiated by extreme climatic events.
Kreyling, J; Jentsch, A; Beierkuhnlein, C
2011-08-01
Deterministic or rule-based succession is expected under homogeneous biotic and abiotic starting conditions. Effects of extreme climatic events such as drought, however, may alter these assembly rules by adding stochastic elements. We monitored the succession of species composition of 30 twin grassland communities with identical biotic and abiotic starting conditions in an initially sown diversity gradient between 1 and 16 species over 13 years. The stochasticity of succession, measured as the synchrony in the development of the species compositions of the twin plots, was strongly altered by the extreme warm and dry summer of 2003. Moreover, it was independent from past and present plant diversity and neighbourhood species compositions. Extreme climatic events can induce stochastic effects in community development and therefore impair predictability even under homogeneous abiotic conditions. Stochastic events may result in lasting shifts of community composition, as well as adverse and unforeseeable effects on the stability of ecological services. PMID:21624029
Uncertainty Representation in Stochastic Reservoir Optimization
NASA Astrophysics Data System (ADS)
Lamontagne, J. R.; Stedinger, J. R.; Shoemaker, C. A.; Tan, S. N.
2014-12-01
Water resources managers attempt to operate reservoir and hydropower systems to maximize system objectives, subject to a host of physical and policy constraints, and in light of uncertainty about future conditions. Optimization models are widely used to advise the decision making process. An important aspect of such models is how uncertainties related to future hydrologic and economic conditions are represented, and the extent to which different uncertainty representations affect the quality of recommended decisions. This study explores the consequences of different uncertainty representations in stochastic optimization models of hydropower systems by comparing simulated system performance using different stochastic optimization models. An important question is whether the added computational burden from greater uncertainty resolution (which can be prohibitive for operational models in many cases) actually improves model recommendations. This is particularly relevant as more complex, ensemble forecasts are incorporated into short- and mid-term planning models. Another important consideration is how watershed hydrology (both seasonal and episodic characteristics), system size, economic context, and the temporal resolution of the model influence how uncertainty should be represented. These topics are explored through several US examples including a sampling stochastic dynamic programming (SSDP) model of a small single-reservoir system on the Kennebec River in Maine, and a stochastic programming model of the large multi-reservoir Federal Columbia River system in the Pacific Northwest. These studies highlight the importance of flexible model frameworks which allow exploration of different representations of a system and of uncertainties before locking operational decision support system development into a specific representation.
Stochastic beamforming for cochlear implant coding
NASA Astrophysics Data System (ADS)
Morse, Robert P.; Holmes, Stephen D.; Shulgin, Boris; Nikitin, Alexander; Stocks, Nigel G.
2007-06-01
Cochlear implants are prosthetic devices used to provide hearing to people who would otherwise be profoundly deaf. The deliberate addition of noise to the electrode signals could increase the amount of information transmitted, but standard cochlear implants do not replicate the noise characteristic of normal hearing because if noise is added in an uncontrolled manner with a limited number of electrodes then it will almost certainly lead to worse performance. Only if partially independent stochastic activity can be achieved in each nerve fibre can mechanisms like suprathreshold stochastic resonance be effective. We are investigating the use of stochastic beamforming to achieve greater independence. The strategy involves presenting each electrode with a linear combination of independent Gaussian noise sources. Because the cochlea is filled with conductive salt solutions, the noise currents from the electrodes interact and the effective stimulus for each nerve fibre will therefore be a different weighted sum of the noise sources. To some extent therefore, the effective stimulus for a nerve fibre will be independent of the effective stimulus of neighbouring fibres. For a particular patient, the electrode position and the amount of current spread are fixed. The objective is therefore to find the linear combination of noise sources that leads to the greatest independence between nerve discharges. In this theoretical study we show that it is possible to get one independent point of excitation (one null) for each electrode and that stochastic beamforming can greatly decrease the correlation between the noise exciting different regions of the cochlea.
John Gough
2005-11-06
We discuss stochastic derivations, stochastic Hamiltonians and the flows that they generate, algebraic fluctuaion-dissipation theorems, etc., in a language common to both classical and quantum algebras. It is convenient to define distinct notions of time-ordered exponentials to take account of the breakdown of the Leibniz rule in the Ito calculus. We introduce a notion of quantum Stratonovich calculus and show how it relates to Stratonovich-Dyson time ordered exponentials. We then use it to demonstrate a natural way to add stochastic derivations.
Jae-hyuk Oh
2015-04-13
We have studied a mathematical relationship between holographic Wilsonian renormalization group(HWRG) and stochastic quantization(SQ) of scalar field with arbitrary mass in AdS spacetime. In the stochastic theory, the field is described by an equation with a form of harmonic oscillator with time dependent frequency and its Euclidean action also shows explicit time dependent kernel in it. We have obtained the stochastic 2-point correlation function and demonstrate that it reproduces the radial evolution of the double trace operator correctly via the suggested relation given in arXiv:1209.2242. Moreover, we justify our stochastic procedure with time dependent kernel by showing that it can map to a new stochastic theory with a standard kernel without time dependence.
AdS braneworld with Backreaction
Bilic, Neven
2014-01-01
We review the tachyon model derived from the dynamics of a 3-brane moving in the AdS5 bulk. The bulk geometry is based on the Randall-Sundrum II model extended to include the radion. The effective tachyon Lagrangian is modified due to the back-reaction of the brane on the bulk geometry.
Smeared antibranes polarise in AdS
NASA Astrophysics Data System (ADS)
Gautason, Fridrik Freyr; Truijen, Brecht; Van Riet, Thomas
2015-07-01
In the recent literature it has been questioned whether the local backreaction of antibranes in flux throats can induce a perturbative brane-flux decay. Most evidence for this can be gathered for D6 branes and D p branes smeared over 6 - p compact directions, in line with the absence of finite temperature solutions for these cases. The solutions in the literature have flat worldvolume geometries and non-compact transversal spaces. In this paper we consider what happens when the worldvolume is AdS and the transversal space is compact. We show that in these circumstances brane polarisation smoothens out the flux singularity, which is an indication that brane-flux decay is prevented. This is consistent with the fact that the cosmological constant would be less negative after brane-flux decay. Our results extend recent results on AdS7 solutions from D6 branes to AdS p+1 solutions from D p branes. We show that supersymmetry of the AdS solutions depend on p non-trivially.
AdS orbifolds and Penrose limits
Alishahiha, Mohsen; Sheikh-Jabbari, Mohammad M.; Tatar, Radu
2002-12-09
In this paper we study the Penrose limit of AdS{sub 5} orbifolds. The orbifold can be either in the pure spatial directions or space and time directions. For the AdS{sub 5}/{Lambda} x S{sup 5} spatial orbifold we observe that after the Penrose limit we obtain the same result as the Penrose limit of AdS{sub 5} x S{sup 5}/{Lambda}. We identify the corresponding BMN operators in terms of operators of the gauge theory on R x S{sup 3}/{Lambda}. The semi-classical description of rotating strings in these backgrounds have also been studied. For the spatial AdS orbifold we show that in the quadratic order the obtained action for the fluctuations is the same as that in S{sup 5} orbifold, however, the higher loop correction can distinguish between two cases.
Spring, William Joseph
2009-04-13
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].
Smeared antibranes polarise in AdS
Gautason, Fridrik Freyr; Van Riet, Thomas
2015-01-01
In the recent literature it has been questioned whether the local backreaction of antibranes in flux throats can induce a perturbative brane-flux decay. Most evidence for this can be gathered for D6 branes and Dp branes smeared over 6-p compact directions, in line with the absence of finite temperature solutions for these cases. The solutions in the literature have flat worldvolume geometries and non-compact transversal spaces. In this paper we consider what happens when the worldvolume is AdS and the transversal space is compact. We show that in these circumstances brane polarisation smoothens out the flux singularity, which is an indication that brane-flux decay is prevented. This is consistent with the fact that the cosmological constant would be less negative after brane-flux decay. Our results extend recent results on AdS_7 solutions from D6 branes to AdS_(p+1) solutions from Dp branes. We show that supersymmetry of the AdS solutions depend on p non-trivially.
Constant time worker thread allocation via configuration caching
Eichenberger, Alexandre E; O'Brien, John K. P.
2014-11-04
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.
Stochastic Constraint Programming Toby Walsh 1
Walsh, Toby
Stochastic Constraint Programming Toby Walsh 1 Abstract. To model combinatorial decision problems involving uncertainty and probability, we introduce stochastic constraint pro gramming. Stochastic constraint programs contain both decision variables (which we can set) and stochastic variables (which follow
Instability corners in AdS space
Fotios V. Dimitrakopoulos; Ben Freivogel; Matthew Lippert; I-Sheng Yang
2014-10-07
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.
Spacecone quantization of AdS superparticle
W. Siegel
2010-06-10
We first-quantize the superparticle describing free 10D IIB supergravity on AdS_5xS^5. We choose the worldline coordinate to be a combination of the bulk (spatial) coordinates of anti de Sitter space and the sphere. The Hamiltonian is independent of this "time" and the fermions. On the boundary, the representation of PSU(2,2|4) becomes that of projective superspace. The prepotential propagator reproduces the known field-strength one.
Hadrons in AdS / QCD correspondence
Alfredo Vega; Ivan Schmidt
2009-02-28
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.
Allocation Management Solutions for High Performance Computing
Jackson, Scott M.
2006-04-01
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.
Strategic planning for disaster recovery with stochastic last mile distribution
Bent, Russell Whitford; Van Hentenryck, Pascal; Coffrin, Carleton
2010-01-01
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.
Strategic Planning for Disaster Recovery with Stochastic Last Mile Distribution
NASA Astrophysics Data System (ADS)
van Hentenryck, Pascal; Bent, Russell; Coffrin, Carleton
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.
AdS4 compactifications of AdS7 solutions in type II supergravity
NASA Astrophysics Data System (ADS)
Rota, Andrea; Tomasiello, Alessandro
2015-07-01
We find new classes of AdS4 solutions with localized branes and orientifolds, both analytic and numerical. We start with an Ansatz for the pure spinors inspired by a recently found class of AdS7 × M 3 solutions in massive IIA; we replace the AdS7 by AdS4 × ?3, and we fibre M 3 over ?3 in a way inspired by a field theory SU(2) twist. We are able to reduce the problem to a system of five ODEs; a further Ansatz reduces them to three. Their solutions can be bijectively mapped to the AdS7 solutions via a simple universal map. This also allows to find a simple analytic form for these solutions. They are naturally interpreted as twisted compactifications of the (1, 0) CFT6's dual to the AdS7 solutions. The larger system of five ODEs also admits more general numerical solutions, again with localized branes; regularity is achieved via an attractor mechanism.
Wim Westera
2009-01-01
Westera, W. (2007). Peer-Allocated Instant Response (PAIR): Computational allocation of peer tutors in learning communities. Journal of Artificial Societies and Social Simulation, http:\\/\\/jasss.soc.surrey.ac.uk\\/10\\/2\\/5.html
Resource allocation using constraint propagation
NASA Technical Reports Server (NTRS)
Rogers, John S.
1990-01-01
The concept of constraint propagation was discussed. Performance increases are possible with careful application of these constraint mechanisms. The degree of performance increase is related to the interdependence of the different activities resource usage. Although this method of applying constraints to activities and resources is often beneficial, it is obvious that this is no panacea cure for the computational woes that are experienced by dynamic resource allocation and scheduling problems. A combined effort for execution optimization in all areas of the system during development and the selection of the appropriate development environment is still the best method of producing an efficient system.
Determining the Appropriate Asset Allocation
Johnson, Jason; Polk, Wade
2002-08-12
and dividends. Bonds are debt instruments. When you buy bonds you are basi- cally playing the role of a banker and lending money to a corpora- tion or a government (local, state or federal). The bond issuer pays you regular interest, and repays the initial... there is an asset allocation that strikes a delicate balance between risk and reward. For example, based on data compiled by Ibbotson Associates through 1998, money market investments offer day-to-day stability but earn the smallest returns over long periods. Stocks...
An intelligent allocation algorithm for parallel processing
NASA Technical Reports Server (NTRS)
Carroll, Chester C.; Homaifar, Abdollah; Ananthram, Kishan G.
1988-01-01
The problem of allocating nodes of a program graph to processors in a parallel processing architecture is considered. The algorithm is based on critical path analysis, some allocation heuristics, and the execution granularity of nodes in a program graph. These factors, and the structure of interprocessor communication network, influence the allocation. To achieve realistic estimations of the executive durations of allocations, the algorithm considers the fact that nodes in a program graph have to communicate through varying numbers of tokens. Coarse and fine granularities have been implemented, with interprocessor token-communication duration, varying from zero up to values comparable to the execution durations of individual nodes. The effect on allocation of communication network structures is demonstrated by performing allocations for crossbar (non-blocking) and star (blocking) networks. The algorithm assumes the availability of as many processors as it needs for the optimal allocation of any program graph. Hence, the focus of allocation has been on varying token-communication durations rather than varying the number of processors. The algorithm always utilizes as many processors as necessary for the optimal allocation of any program graph, depending upon granularity and characteristics of the interprocessor communication network.
CCAP: CDMA Capacity Allocation and Planning
Akl, Robert
CCAP: CDMA Capacity Allocation and Planning Robert Akl, Manju Hegde, Alex Chandra Washington................................................................................................................3 1.1 CDMA Characteristics .......................................................................................3 1.2 CDMA Capacity
Stochastic nonlinear stabilization
NASA Astrophysics Data System (ADS)
Deng, Hua
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.
An approach to virtual allocation in storage systems
Sukwoo Kang; A. L. Narasimha Reddy
2006-01-01
This paper presents virtual allocation, a scheme for exible storage allocation. Virtual allocation separates storage allocation from the le system. It employs an allocate-on-write strategy, which lets applications t into the actual usage of storage space without regard to the congured le system size. This improves exibilit y by allowing storage space to be shared across dieren t le systems.
Quantum Spontaneous Stochasticity
Eyink, Gregory L
2015-01-01
The quantum wave-function of a massive particle with small initial uncertainties (consistent with the uncertainty relation) is believed to spread very slowly, so that the dynamics is deterministic. This assumes that the classical motions for given initial data are unique. In fluid turbulence non-uniqueness due to "roughness" of the advecting velocity field is known to lead to stochastic motion of classical particles. Vanishingly small random perturbations are magnified by Richardson diffusion in a "nearly rough" velocity field so that motion remains stochastic as the noise disappears, or classical spontaneous stochasticity, . Analogies between stochastic particle motion in turbulence and quantum evolution suggest that there should be quantum spontaneous stochasticity (QSS). We show this for 1D models of a particle in a repulsive potential that is "nearly rough" with $V(x) \\sim C|x|^{1+\\alpha}$ at distances $|x|\\gg \\ell$ , for some UV cut-off $\\ell$, and for initial Gaussian wave-packet centered at 0. We consi...
NASA Astrophysics Data System (ADS)
Baumann, Erwin W.; Williams, David L.
1993-08-01
Artificial neural networks capable of learning and recalling stochastic associations between non-deterministic quantities have received relatively little attention to date. One potential application of such stochastic associative networks is the generation of sensory 'expectations' based on arbitrary subsets of sensor inputs to support anticipatory and investigate behavior in sensor-based robots. Another application of this type of associative memory is the prediction of how a scene will look in one spectral band, including noise, based upon its appearance in several other wavebands. This paper describes a semi-supervised neural network architecture composed of self-organizing maps associated through stochastic inter-layer connections. This 'Stochastic Associative Memory' (SAM) can learn and recall non-deterministic associations between multi-dimensional probability density functions. The stochastic nature of the network also enables it to represent noise distributions that are inherent in any true sensing process. The SAM architecture, training process, and initial application to sensor image prediction are described. Relationships to Fuzzy Associative Memory (FAM) are discussed.
Address Allocation ModelsAddress Allocation Models Clean Slate Research "Agenda"
Guerin, Roch
3/10/2008 1 Address Allocation ModelsAddress Allocation Models As a matter of fact the IPv6 vs. IPv4 story holds many lessons that clean slate proposals can benefit from of addresses, be they IPv4 or IPv6 Have a specific proposal for allocating new IPv6 addresses
STOCHASTIC COOLING FOR BUNCHED BEAMS.
BLASKIEWICZ, M.
2005-05-16
Problems associated with bunched beam stochastic cooling are reviewed. A longitudinal stochastic cooling system for RHIC is under construction and has been partially commissioned. The state of the system and future plans are discussed.
Stochastic Optimization for Machine Learning
Powell, Warren B.
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
Stochastic extensions of the regularized Schrödinger-Newton equation
Stefan Nimmrichter; Klaus Hornberger
2015-02-10
We show that the Schr\\"{o}dinger-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.
On impulsive integrated pest management models with stochastic effects
Akman, Olcay; Comar, Timothy D.; Hrozencik, Daniel
2015-01-01
We extend existing impulsive differential equation models for integrated pest management (IPM) by including stage structure for both predator and prey as well as by adding stochastic elements in the birth rate of the prey. Based on our model, we propose an approach that incorporates various competing stochastic components. This approach enables us to select a model with optimally determined weights for maximum accuracy and precision in parameter estimation. This is significant in the case of IPM because the proposed model accommodates varying unknown environmental and climatic conditions, which affect the resources needed for pest eradication. PMID:25954144
Hamiltonian Mechanics of Stochastic Acceleration
NASA Astrophysics Data System (ADS)
Burby, J. W.; Zhmoginov, A. I.; Qin, H.
2013-11-01
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.
Stochastically Incomplete Manifolds and Graphs
Radoslaw Krzysztof Wojciechowski
2009-10-29
We survey geometric properties which imply the stochastic incompleteness of the minimal diffusion process associated to the Laplacian on manifolds and graphs. In particular, we completely characterize stochastic incompleteness for spherically symmetric graphs and show that, in contrast to the case of Riemannian manifolds, there exist examples of stochastically incomplete graphs of polynomial volume growth.
Stochastic Spatial Models Rick Durrett
Durrett, Richard
Stochastic Spatial Models Rick Durrett Cornell University Ithaca NY 14853 USA Contents I. Stochastic Spatial Models vs. ODE's 4. Case 1. Attracting Fixed Point 5. Rapid Stirring Limits 6. Case 2. Two. In a stochastic spatial model space is represented by a grid of sites, usually the d-dimensional integer lattice Z
Stochastic Processes ALAN J. MCKANE
McKane, Alan
Stochastic Processes ALAN J. MCKANE Theory Group, School of Physics and Astronomy, University. Stochastic Differential Equations VII. Path Integrals VIII. System Size Expansion IX. Future Directions X evolution of the probability density function of a stochastic process. It resembles a diffusion equation
Stochastic Models of Human Growth.
ERIC Educational Resources Information Center
Goodrich, Robert L.
Stochastic difference equations of the Box-Jenkins form provide an adequate family of models on which to base the stochastic theory of human growth processes, but conventional time series identification methods do not apply to available data sets. A method to identify structure and parameters of stochastic difference equation models of human…
Asymptotic theory for the dynamic of networks with heterogenous social capital allocation
Ubaldi, Enrico; Karsai, Márton; Vezzani, Alessandro; Burioni, Raffaella; Vespignani, Alessandro
2015-01-01
The structure and dynamic of social network are largely determined by the heterogeneous interaction activity and social capital allocation of individuals. These features interplay in a non-trivial way in the formation of network and challenge a rigorous dynamical system theory of network evolution. Here we study seven real networks describing temporal human interactions in three different settings: scientific collaborations, Twitter mentions, and mobile phone calls. We find that the node's activity and social capital allocation can be described by two general functional forms that can be used to define a simple stochastic model for social network dynamic. This model allows the explicit asymptotic solution of the Master Equation describing the system dynamic, and provides the scaling laws characterizing the time evolution of the social network degree distribution and individual node's ego network. The analytical predictions reproduce with accuracy the empirical observations validating the theoretical approach....
NASA Astrophysics Data System (ADS)
Bekri, Eleni; Yannopoulos, Panayotis; Disse, Markus
2013-04-01
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).
Basic stochastic simulation: Stochastic simulation algorithm
NSDL National Science Digital Library
2013-06-21
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.
Structures and stochastic methods
Cakmak, A.S.
1987-01-01
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.
Stochastic Feedforward Control Technique
NASA Technical Reports Server (NTRS)
Halyo, Nesim
1990-01-01
Class of commanded trajectories modeled as stochastic process. Advanced Transport Operating Systems (ATOPS) research and development program conducted by NASA Langley Research Center aimed at developing capabilities for increases in capacities of airports, safe and accurate flight in adverse weather conditions including shear, winds, avoidance of wake vortexes, and reduced consumption of fuel. Advances in techniques for design of modern controls and increased capabilities of digital flight computers coupled with accurate guidance information from Microwave Landing System (MLS). Stochastic feedforward control technique developed within context of ATOPS program.
Stochasticity, a first introduction
NSDL National Science Digital Library
2013-06-21
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.
Girod, Bernd
for multiple video streams in ad-hoc wireless networks* ZHU Xiao-qing1 , SINGH Jatinder Pal2 , GIROD Bernd1 (1 Information System Laboratory, Stanford University, California 94305, USA) (2 Deutsche Telekom Laboratories for multiple video streams in an ad-hoc wireless network requires appropriate routing and rate allocation
Stefano Bolognesi; David Tong
2012-04-26
We study the formation of fermion condensates in Anti de Sitter space. In particular, we describe a novel version of magnetic catalysis that arises for fermions in asymptotically AdS4 geometries which cap off in the infra-red with a hard wall. We show that the presence of a magnetic field induces a fermion condensate in the bulk that spontaneously breaks CP symmetry. From the perspective of the dual boundary theory, this corresponds to a strongly coupled version of magnetic catalysis in d=2+1.
House Allocation With Fractional Endowments Stergios Athanassoglou
Sethuraman, Jay
House Allocation With Fractional Endowments Stergios Athanassoglou Jay Sethuraman July 2009; revised January 2010 Abstract We study a generalization of the well known house allocation problem in which agents may own fractions of different houses summing to an arbitrary quantity, but have use
42 CFR 457.228 - Cost allocation.
Code of Federal Regulations, 2010 CFR
2010-10-01
...Reduction of Federal Medical Payments § 457.228 Cost allocation. A State plan must provide that the single or appropriate CHIP Agency will have an approved cost allocation plan on file with the Department in accordance with the requirements contained in...
42 CFR 457.228 - Cost allocation.
Code of Federal Regulations, 2013 CFR
2013-10-01
...Reduction of Federal Medical Payments § 457.228 Cost allocation. A State plan must provide that the single or appropriate CHIP Agency will have an approved cost allocation plan on file with the Department in accordance with the requirements contained in...
Auction Mechanisms for Network Resource Allocation
Koutsopoulos, Iordanis
and availability, together with the need for online resource sharing and reallocation as requests arise and evolveAuction Mechanisms for Network Resource Allocation Iordanis Koutsopoulos George Iosifidis (Invited for realizing efficient resource allocation. The major asset of auctions is their obliviousness to node
Energy Uptake and Allocation During Ontogeny
Brown, James H.
Energy Uptake and Allocation During Ontogeny Chen Hou,1 * Wenyun Zuo,2 Melanie E. Moses,3 William H predicts how growing animals allocate food energy between synthesis of new biomass and maintenance of existing biomass. Previous energy budget models have typically had their bases in rates of either food
Acquisitions Allocations: Fairness, Equity and Bundled Pricing.
ERIC Educational Resources Information Center
Packer, Donna
2001-01-01
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.…
Thematic Mapper data for forest resource allocation
NASA Technical Reports Server (NTRS)
Zeff, Ilene S.; Merry, Carolyn J.
1993-01-01
A technique for classifying a Landsat Thematic Mapper image was demonstrated on the Wayne National Forest of southeastern Ohio. The classified image was integrated into a geographic information system database, and prescriptive forest land use allocation models were developed using the techniques of cartographic modeling. Timber harvest sites and accompanying haul roads were allocated.
Temporal Task Allocation in Periodic Environments
Birattari, Mauro
a robot swarm that has to perform task allocation in an environment that features periodic properties that synchronizes robots of the swarm with the environment and with each other. In this algorithm, robots use only that a robot swarm that uses the proposed temporal task allocation algorithm performs consider- ably more tasks
Disk Allocation Methods for Parallelizing Grid Files
Yvonne Zhou; Shashi Shekhar; Mark Coyle
1994-01-01
The grid file (1) is a well known access method for multi-dimensional and spatial data. The response time needed to process path and range queries on the grid file access method can be improved significantly by distributing the data pages over multiple disks. This paper explores the disk allocation methods used to allocate the data pages of grid file among
Allocation and Scheduling of Complex Periodic Tasks
Krithi Ramamritham
1990-01-01
A static algorithm for allocating and scheduling components of complex periodic tasks across sites in distributed systems is discussed. Besides dealing with the periodicity constraints (which have been the sole concern of many previous algorithms), this algorithm handles precedence, communication, and fault-tolerance requirements of subtasks of the tasks. The algorithm determines the allocation of subtasks of periodic tasks to sites,
Budget allocation and the analytic hierarchy process
Hulme, B.L. (Hulme Mathematics (USA))
1990-10-01
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.
The Optimal Allocation of Conservation Funds
JunJie Wu; William G. Boggess
1999-01-01
This paper presents a framework to evaluate alternative designs of conservation programs and their implications for the allocation of conservation funds. We show that the efficient allocation of conservation funds must consider two important “pooling” effects—cumulative effects and interrelationships among alternative environmental benefits. Ignoring the cumulative effects of environmental benefits may cause conservation funds to be overly dispersed geographically and,
Communication-Aware Processor Allocation for Supercomputers
Fekete, Sándor P.
Communication-Aware Processor Allocation for Supercomputers Michael A. Bender1 , David P. Bunde2, Kingston, Ontario, K7L 3N6, Canada henk@cs.queensu.ca Abstract. We give processor-allocation algorithms for grid architec- tures, where the objective is to select processors from a set of available processors
Projected 1995-96 Cost Allocation Summary.
ERIC Educational Resources Information Center
Wisconsin Technical Coll. System Board, Madison.
Designed for use in calculating the distribution of state aid to colleges in the Wisconsin Technical College System (WTCS) and in preparing financial and enrollment reports, this document provides a summary of projected cost allocations for the WTCS for 1995-96 derived from data submitted by the colleges on cost allocation schedules. Following a…
Projected 1997-98 Cost Allocation Summary.
ERIC Educational Resources Information Center
Wisconsin Technical Coll. System Board, Madison.
Designed for use in calculating the distribution of state aid to colleges in the Wisconsin Technical College System (WTCS) and in preparing financial and enrollment reports, this document provides a summary of projected cost allocations for the WTCS for 1997-98, derived from data submitted by the colleges on cost allocation schedules. Following a…
Projected 1998-99 Cost Allocation Summary.
ERIC Educational Resources Information Center
Chin, Edward
Designed for use in calculating the distribution of state aid to colleges in the Wisconsin Technical College System (WTCS) and in preparing financial and enrollment reports, this document provides a summary of projected cost allocations for the WTCS for 1998-99, derived from data submitted by the colleges on cost allocation schedules. Following a…
Actual 1999-2000 Cost Allocation Summary.
ERIC Educational Resources Information Center
Wisconsin Technical Coll. System Board, Madison.
This report provides data on the 1999-2000 cost allocation schedules of Wisconsin's technical colleges. Cost allocation information is used to calculate the distribution of state aid to the colleges and prepare financial and enrollment reports, including state statistical summaries and reports on the financing of Wisconsin's technical colleges.…
UNIVERSITY SPACE POLICY ALLOCATION OF UNIVERSITY SPACE
UNIVERSITY 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 to the university's success in attracting research funding, the need for space and facilities has grown
Optimal Power Allocation in Multiuser OFDM Systems
Evans, Brian L.
-- Multiuser orthogonal frequency division multiplex- ing (MU-OFDM) is a promising technique for achieving high downlink capacities in future cellular systems. A key issue in MU-OFDM is the allocation of the OFDM in advance. In this paper, a proportional rate adaptive resource allocation method for MU- OFDM is proposed
Rethinking Reinforcement: Allocation, Induction, and Contingency
ERIC Educational Resources Information Center
Baum, William M.
2012-01-01
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…
Online Resource Allocation with Structured Diversification Nicholas Johnson
Banerjee, Arindam
Online Resource Allocation with Structured Diversification Nicholas Johnson Arindam Banerjee be considered as online resource allocation (ORA) problems. A key consideration in such ORA problems is some for online resource allocation with structured diversification (ORASD) as a constrained online convex
10 CFR 217.54 - Elements of an allocation order.
Code of Federal Regulations, 2012 CFR
2012-01-01
...placed order, of the Secretary of Energy. The signature or use of the...accordance with the provisions of the Energy Priorities and Allocations System...Allocations System”; and (e) A current copy of the Energy Priorities and Allocations...
10 CFR 217.54 - Elements of an allocation order.
Code of Federal Regulations, 2013 CFR
2013-01-01
...placed order, of the Secretary of Energy. The signature or use of the...accordance with the provisions of the Energy Priorities and Allocations System...Allocations System”; and (e) A current copy of the Energy Priorities and Allocations...
10 CFR 217.54 - Elements of an allocation order.
Code of Federal Regulations, 2014 CFR
2014-01-01
...placed order, of the Secretary of Energy. The signature or use of the...accordance with the provisions of the Energy Priorities and Allocations System...Allocations System”; and (e) A current copy of the Energy Priorities and Allocations...
Phylogenetic constraints on elemental stoichiometry and resource allocation in heterotrophic
Allison, Steven D.
Phylogenetic constraints on elemental stoichiometry and resource allocation in heterotrophic marine and underlying biochemical allocation patterns of heterotrophic marine bacteria. We hypothesized that phylogeny significantly con- strains biochemical allocation strategy and elemental composition among taxa of heterotrophic
24 CFR 791.404 - Field Office allocation planning.
Code of Federal Regulations, 2010 CFR
2010-04-01
...2010-04-01 2010-04-01 false Field Office allocation planning. 791.404...for Housing Assistance § 791.404 Field Office allocation planning. (a) General...needs of each allocation area within the field office jurisdiction. (b)...
5 CFR 319.202 - Allocation of positions.
Code of Federal Regulations, 2010 CFR
2010-01-01
...SENIOR-LEVEL AND SCIENTIFIC AND PROFESSIONAL POSITIONS Position Allocations and Establishment § 319.202 Allocation of positions. SL and ST positions may be established only under a position allocation approved by...
24 CFR 791.404 - Field Office allocation planning.
Code of Federal Regulations, 2011 CFR
2011-04-01
...2011-04-01 2011-04-01 false Field Office allocation planning. 791.404...for Housing Assistance § 791.404 Field Office allocation planning. (a) General...needs of each allocation area within the field office jurisdiction. (b)...
Genetically Engineered Food AD
NSDL National Science Digital Library
Lana Hays (Saint Henry District High School REV)
2005-04-11
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.
NSDL National Science Digital Library
Doyle, Kim.
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.
Carbon allocation and accumulation in conifers
Gower, S.T.; Isebrands, J.G.; Sheriff, D.W.
1995-07-01
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.
Age and equity in liver transplantation: An organ allocation model.
Cucchetti, Alessandro; Ross, Lainie Friedman; Thistlethwaite, J Richard; Vitale, Alessandro; Ravaioli, Matteo; Cescon, Matteo; Ercolani, Giorgio; Burra, Patrizia; Cillo, Umberto; Pinna, Antonio Daniele
2015-10-01
A moral liver allocation policy must be fair. We considered a 2-step, 2-principle allocation system called "age mapping." Its first principle, equal opportunity, ensures that candidates of all ages have an equal chance of getting an organ. Its second principle, prudential lifespan equity, allocates younger donor grafts to younger candidates and older donors to older candidates in order to increase the likelihood that all recipients achieve a "full lifespan." Data from 2476 candidates and 1371 consecutive adult liver transplantations (from 1999 to 2012) were used to determine whether age mapping can reduce the gap in years of life lost (YLL) between younger and older recipients. A parametric Weibull prognostic model was developed to estimate total life expectancy after transplantation using survival of the general population matched by sex and age as a reference. Life expectancy from birth was calculated by adding age at transplant and total life expectancy after transplantation. In multivariate analysis, recipient age, hepatitis C virus status, Model for End-Stage Liver Disease score at transplant of >30, and donor age were significantly related to prognosis after surgery (P?allocation model, for various age groups were: recipients 18-47 years (n = 340) = 65.2 (3.3); 48-55 years (n = 387) = 72.7 (2.1); 56-61 years (n = 372) = 74.7 (1.7) and for recipients >61 years (n = 272) = 77.4 (1.4). The total number of YLL equaled 523 years. Redistributing liver grafts, using an age mapping algorithm, reduces the lifespan gap between younger and older candidates by 33% (from 12.3% to 8.3%) and achieves a 14% overall reduction of YLL (73 years) compared to baseline liver distribution. In conclusion, deliberately incorporating age into an allocation algorithm promotes fairness and increases efficiency. Liver Transpl 21:1241-1249, 2015. © 2015 AASLD. PMID:26174971
Tollestrup, A.V.; Dugan, G
1983-12-01
Major headings in this review include: proton sources; antiproton production; antiproton sources and Liouville, the role of the Debuncher; transverse stochastic cooling, time domain; the accumulator; frequency domain; pickups and kickers; Fokker-Planck equation; calculation of constants in the Fokker-Planck equation; and beam feedback. (GHT)
Stochastic Neuroscience Bard Ermentrout
Ermentrout, G. Bard
Stochastic Neuroscience Bard Ermentrout Dept of Math University of Pgh Pgh PA CLARENDON PRESS activity is sometimes observed across multiple recording sites and over distant brain areas. While local noise affects neural oscillators, both in isolation and when coupled to each other. Further- more, I
CORRELATIONS IN STOCHASTIC SYSTEMS
Karney, Charles
in the stochastic sea when there is a small island present. The results show that the particle can be stuck close, the motion of a charged particle in various magnetic- confinement devices, the acceleration of a particle to the island for very long times. For the standard mapping, where accelerator modes are possible, it appears
Finding Approximate Competitive Equilibria: Efficient and Fair Course Allocation
Finding Approximate Competitive Equilibria: Efficient and Fair Course Allocation Abraham Othman Competitive Equilibria: Efficient and Fair Course Allocation, Abraham Othman, Eric Budish, and Tuomas Sandholm
How to Make Ad Hoc Proof Automation Less Ad Hoc
Dreyer, Derek
How to Make Ad Hoc Proof Automation Less Ad Hoc Georges Gonthier1 Beta Ziliani2 Aleks Nanevski3 Software Institute, Madrid ICFP 2011, Tokyo #12;Why proof automation at ICFP? Ad hoc polymorphism Overloading terms Ad hoc proof automation Overloading lemmas "How to make ad hoc polymorphism less ad hoc
In search for a possible statistical basis of Stochastic Resonance
NASA Astrophysics Data System (ADS)
Bezrukov, Sergey M.; Vodyanoy, Igor
2000-03-01
Stochastic Resonance (SR) is a phenomenon of enhancing the information content at the system output by adding noise to the input signal. Originally, SR was shown in dynamical systems ranging from glaciers to superconducting junctions. Later it was found to occur in non-dynamical systems with and without thresholds. Now a growing number of publications report SR practically everywhere: in meteorology, sociology, finance, psycho-physics, electrophysiology, chemistry, etc. We seek a general statistical mechanism which would capture and, thus, explain the essence of SR independently of the system where it is found. Though, at present, this problem is far from solved, we think that the doubly-stochastic Poisson process approach described here represents a significant step toward such a generalization. Using this approach, we show that, in contrast to the current point of view, an activation barrier is not a necessary prerequisite of a Stochastic Resonator.
Water resources planning and management : A stochastic dual dynamic programming approach
NASA Astrophysics Data System (ADS)
Goor, Q.; Pinte, D.; Tilmant, A.
2008-12-01
Allocating water between different users and uses, including the environment, is one of the most challenging task facing water resources managers and has always been at the heart of Integrated Water Resources Management (IWRM). As water scarcity is expected to increase over time, allocation decisions among the different uses will have to be found taking into account the complex interactions between water and the economy. Hydro-economic optimization models can capture those interactions while prescribing efficient allocation policies. Many hydro-economic models found in the literature are formulated as large-scale non linear optimization problems (NLP), seeking to maximize net benefits from the system operation while meeting operational and/or institutional constraints, and describing the main hydrological processes. However, those models rarely incorporate the uncertainty inherent to the availability of water, essentially because of the computational difficulties associated stochastic formulations. The purpose of this presentation is to present a stochastic programming model that can identify economically efficient allocation policies in large-scale multipurpose multireservoir systems. The model is based on stochastic dual dynamic programming (SDDP), an extension of traditional SDP that is not affected by the curse of dimensionality. SDDP identify efficient allocation policies while considering the hydrologic uncertainty. The objective function includes the net benefits from the hydropower and irrigation sectors, as well as penalties for not meeting operational and/or institutional constraints. To be able to implement the efficient decomposition scheme that remove the computational burden, the one-stage SDDP problem has to be a linear program. Recent developments improve the representation of the non-linear and mildly non- convex hydropower function through a convex hull approximation of the true hydropower function. This model is illustrated on a cascade of 14 reservoirs on the Nile river basin.
Weber, Stefan
Markov processes Stochastic analysis for additive functionals Geometry of rough spaces Stochastic for Markov processes #12;Markov processes Stochastic analysis for additive functionals Geometry of rough spaces 1 Markov processes: trivia. 2 Stochastic analysis for additive functionals. 3 Applications
Stochastic model for aerodynamic force dynamics on wind turbine blades in unsteady wind inflow
Luhur, Muhammad Ramzan; Kühn, Martin; Wächter, Matthias
2015-01-01
The paper presents a stochastic approach to estimate the aerodynamic forces with local dynamics on wind turbine blades in unsteady wind inflow. This is done by integrating a stochastic model of lift and drag dynamics for an airfoil into the aerodynamic simulation software AeroDyn. The model is added as an alternative to the static table lookup approach in blade element momentum (BEM) wake model used by AeroDyn. The stochastic forces are obtained for a rotor blade element using full field turbulence simulated wind data input and compared with the classical BEM and dynamic stall models for identical conditions. The comparison shows that the stochastic model generates additional extended dynamic response in terms of local force fluctuations. Further, the comparison of statistics between the classical BEM, dynamic stall and stochastic models' results in terms of their increment probability density functions gives consistent results.
Sun Zhiyuan; Yu Xin; Liu Ying; Gao Yitian
2012-12-15
We investigate the dynamics of the bound vector solitons (BVSs) for the coupled nonlinear Schroedinger equations with the nonhomogenously stochastic perturbations added on their dispersion terms. Soliton switching (besides soliton breakup) can be observed between the two components of the BVSs. Rate of the maximum switched energy (absolute values) within the fixed propagation distance (about 10 periods of the BVSs) enhances in the sense of statistics when the amplitudes of stochastic perturbations increase. Additionally, it is revealed that the BVSs with enhanced coherence are more robust against the perturbations with nonhomogenous stochasticity. Diagram describing the approximate borders of the splitting and non-splitting areas is also given. Our results might be helpful in dynamics of the BVSs with stochastic noises in nonlinear optical fibers or with stochastic quantum fluctuations in Bose-Einstein condensates.
Using genetic algorithm to solve a new multi-period stochastic optimization model
NASA Astrophysics Data System (ADS)
Zhang, Xin-Li; Zhang, Ke-Cun
2009-09-01
This paper presents a new asset allocation model based on the CVaR risk measure and transaction costs. Institutional investors manage their strategic asset mix over time to achieve favorable returns subject to various uncertainties, policy and legal constraints, and other requirements. One may use a multi-period portfolio optimization model in order to determine an optimal asset mix. Recently, an alternative stochastic programming model with simulated paths was proposed by Hibiki [N. Hibiki, A hybrid simulation/tree multi-period stochastic programming model for optimal asset allocation, in: H. Takahashi, (Ed.) The Japanese Association of Financial Econometrics and Engineering, JAFFE Journal (2001) 89-119 (in Japanese); N. Hibiki A hybrid simulation/tree stochastic optimization model for dynamic asset allocation, in: B. Scherer (Ed.), Asset and Liability Management Tools: A Handbook for Best Practice, Risk Books, 2003, pp. 269-294], which was called a hybrid model. However, the transaction costs weren't considered in that paper. In this paper, we improve Hibiki's model in the following aspects: (1) The risk measure CVaR is introduced to control the wealth loss risk while maximizing the expected utility; (2) Typical market imperfections such as short sale constraints, proportional transaction costs are considered simultaneously. (3) Applying a genetic algorithm to solve the resulting model is discussed in detail. Numerical results show the suitability and feasibility of our methodology.
Probing crunching AdS cosmologies
Kumar, S Prem
2015-01-01
Holographic gravity duals of deformations of CFTs formulated on de Sitter spacetime contain FRW geometries behind a horizon, with cosmological big crunch singularities. Using a specific analytically tractable solution within a particular single scalar truncation of N=8 supergravity on AdS_4, we first probe such crunching cosmologies with spacelike radial geodesics that compute spatially antipodal correlators of large dimension boundary operators. At late times, the geodesics lie on the FRW slice of maximal expansion behind the horizon. The late time two-point functions factorise, and when transformed to the Einstein static universe, they exhibit a temporal non-analyticity determined by the maximal value of the scale factor a_{max} . Radial geodesics connecting antipodal points necessarily have de Sitter energy E \\leq a_{max}, while geodesics with E > a_{max} terminate at the crunch, the two categories of geodesics being separated by the maximal expansion slice. The spacelike crunch singularity is curved "outw...
Linear modelling of attentional resource allocation
NASA Technical Reports Server (NTRS)
Pierce, B.
1978-01-01
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.
Ultimate open pit stochastic optimization
NASA Astrophysics Data System (ADS)
Marcotte, Denis; Caron, Josiane
2013-02-01
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.
Stochastic Representation of RMS Dynamical Problems Group
Plant, Robert
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
Stochastic Convex Optimization with Multiple Objectives
Jin, Rong
Stochastic Convex Optimization with Multiple Objectives Mehrdad Mahdavi Michigan State University and stochasticity in the first-order information. We cast the stochastic multi- ple objective optimization problem first approximates the stochastic objectives by sampling and then solves a constrained stochastic
Stochastic modeling of kHz QPO light curves
R. Vio; P. Rebusco; P. Andreani; H. Madsen; R. V. Overgaard
2006-02-08
The Kluzniak & Abramowicz model explains high frequency, double peak, "3:2" QPOs observed in neutron star and black hole sources in terms of a non-linear parametric resonance between radial and vertical epicyclic oscillations of an almost Keplerian accretion disk. The 3:2 ratio of epicyclic frequencies occurs only in strong gravity. Rebusco (2004) and Horak (2004) studied the model analytically: they proved that a small forcing may indeed excite the parametric 3:2 resonance, but they have not explained the physical nature of the forcing. Here we integrate their equations numerically, dropping the ad hoc forcing, and adding instead a stochastic term to mimic the action of the very complex processes that occur in disks as, for example, MRI turbulence. We demonstrate that the presence of the stochastic term triggers the resonance in epicyclic oscillations of nearly Keplerian disks, and influences their pattern.
Stochastic phase synchronization in the crayfish mechanoreceptor/photoreceptor system
NASA Astrophysics Data System (ADS)
Bahar, S.; Moss, F.
2003-03-01
The two light-sensitive neurons in the crayfish's abdominal sixth ganglion ("caudal photoreceptors," or CPRs), are both primary light sensors and secondary neurons in a mechanosensory pathway. Pei et al. (1996) demonstrated that light enhances the transduction of weak, periodic hydrodynamic stimuli (measured as an increase in the signal-to-noise ratio at the stimulus frequency in the power spectrum of the recorded neural spikes). This has been interpreted as a stochastic resonance effect, in which added light increases the noise intensity of the input to the photoreceptor (possibly through fluctuations in membrane potential), leading to an enhancement of the signal-to-noise ratio (SNR). Here, we discuss the recent demonstration (Bahar et al., 2002) of the correlation between a stochastic-resonance-like effect and an increase in stochastic phase synchronization between the neural response and a periodic mechanical stimulus. We also discuss a novel effect (Bahar et al., 2002) in which light increases the SNR of the second higher harmonic of a periodic input signal, effectively rectifying the input signal. This "second harmonic effect" can also be interpreted in terms of stochastic phase synchronization (Bahar et al., 2002). We review other recent results on the role of stochastic phase synchronization in mediating sensory responses in the crayfish nervous system.
STOCHASTIC COOLING POWER REQUIREMENTS.
WEI,J.BLASKIEWICZ,M.BRENNAN,M.
2004-07-05
A practical obstacle for stochastic cooling in high-energy colliders like RHIC is the large amount of power needed for the cooling system. Based on the coasting-beam Fokker-Planck (F-P) equation, we analytically derived the optimum cooling rate and cooling power for a beam of uniform distribution and a cooling system of linear gain function. The results indicate that the usual back-of-envelope formula over-estimated the cooling power by a factor of the mixing factor M. On the other hand, the scaling laws derived from the coasting-beam Fokker-Planck approach agree with those derived from the bunched-beam Fokker-Planck approach if the peak beam intensity is used as the effective coasting-beam intensity. A longitudinal stochastic cooling system of 4-8 GHz bandwidth in RHIC can effectively counteract intrabeam scattering, preventing the beam from escaping the RF bucket becoming debunched around the ring.
Diffusion in stochastic sandpiles
S. D. da Cunha; Ronaldo R. Vidigal; L. R. da Silva; Ronald Dickman
2009-06-08
We study diffusion of particles in large-scale simulations of one-dimensional stochastic sandpiles, in both the restricted and unrestricted versions. The results indicate that the diffusion constant scales in the same manner as the activity density, so that it represents an alternative definition of an order parameter. The critical behavior of the unrestricted sandpile is very similar to that of its restricted counterpart, including the fact that a data collapse of the order parameter as a function of the particle density is only possible over a very narrow interval near the critical point. We also develop a series expansion, in inverse powers of the density. for the collective diffusion coefficient in a variant of the stochastic sandpile in which the toppling rate at a site with $n$ particles is $n(n-1)$, and compare the theoretical prediction with simulation results.
Allocation Games: Addressing the Ill-Posed Nature of Allocation in Life-Cycle Inventories.
Hanes, Rebecca J; Cruze, Nathan B; Goel, Prem K; Bakshi, Bhavik R
2015-07-01
Allocation is required when a life cycle contains multi-functional processes. One approach to allocation is to partition the embodied resources in proportion to a criterion, such as product mass or cost. Many practitioners apply multiple partitioning criteria to avoid choosing one arbitrarily. However, life cycle results from different allocation methods frequently contradict each other, making it difficult or impossible for the practitioner to draw any meaningful conclusions from the study. Using the matrix notation for life-cycle inventory data, we show that an inventory that requires allocation leads to an ill-posed problem: an inventory based on allocation is one of an infinite number of inventories that are highly dependent upon allocation methods. This insight is applied to comparative life-cycle assessment (LCA), in which products with the same function but different life cycles are compared. Recently, there have been several studies that applied multiple allocation methods and found that different products were preferred under different methods. We develop the Comprehensive Allocation Investigation Strategy (CAIS) to examine any given inventory under all possible allocation decisions, enabling us to detect comparisons that are not robust to allocation, even when the comparison appears robust under conventional partitioning methods. While CAIS does not solve the ill-posed problem, it provides a systematic way to parametrize and examine the effects of partitioning allocation. The practical usefulness of this approach is demonstrated with two case studies. The first compares ethanol produced from corn stover hydrolysis, corn stover gasification, and corn grain fermentation. This comparison was not robust to allocation. The second case study compares 1,3-propanediol (PDO) produced from fossil fuels and from biomass, which was found to be a robust comparison. PMID:26061700
Time allocation of disabled individuals.
Pagán, Ricardo
2013-05-01
Although some studies have analysed the disability phenomenon and its effect on, for example, labour force participation, wages, job satisfaction, or the use of disability pension, the empirical evidence on how disability steals time (e.g. hours of work) from individuals is very scarce. This article examines how disabled individuals allocate their time to daily activities as compared to their non-disabled counterparts. Using time diary information from the Spanish Time Use Survey (last quarter of 2002 and the first three quarters of 2003), we estimate the determinants of time (minutes per day) spent on four aggregate categories (market work, household production, tertiary activities and leisure) for a sample of 27,687 non-disabled and 5250 disabled individuals and decompose the observed time differential by using the Oaxaca-Blinder methodology. The results show that disabled individuals devote less time to market work (especially females), and more time to household production (e.g. cooking, cleaning, child care), tertiary activities (e.g., sleeping, personal care, medical treatment) and leisure activities. We also find a significant effect of age on the time spent on daily activities and important differences by gender and disability status. The results are consistent with the hypothesis that disability steals time, and reiterate the fact that more public policies are needed to balance working life and health concerns among disabled individuals. PMID:23517707
Controlling Stochastic Resonance
NASA Astrophysics Data System (ADS)
Gammaitoni, Luca; Löcher, Markus; Bulsara, Adi; Hänggi, Peter; Neff, Joseph; Wiesenfeld, Kurt; Ditto, William; Inchiosa, Mario E.
1999-06-01
We introduce an open-loop control scheme for stochastic resonators; the scheme permits the enhancement or suppression of the spectral response to threshold-crossing events triggered by a time-periodic signal in background noise. The control is demonstrated in experiments using a Schmitt trigger. A generic two-state theory captures the essential features observed in our experiments and in numerical simulations; this suggests the generality of the effect.
Dorogovtsev, Andrei A
2010-06-29
For sets in a Hilbert space the concept of quadratic entropy is introduced. It is shown that this entropy is finite for the range of a stochastic flow of Brownian particles on R. This implies, in particular, the fact that the total time of the free travel in the Arratia flow of all particles that started from a bounded interval is finite. Bibliography: 10 titles.
Stochastic equations for thermodynamics
R. Tsekov
2015-06-04
The applicability of stochastic differential equations to thermodynamics is considered and a new form, different from the classical Ito and Stratonovich forms, is introduced. It is shown that the new presentation is more appropriate for the description of thermodynamic fluctuations. The range of validity of the Boltzmann-Einstein principle is also discussed and a generalized alternative is proposed. Both expressions coincide in the small fluctuation limit, providing a normal distribution density.
METHODS OF ANALYSIS FOR WASTE LOAD ALLOCATION
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...
STORAGE CAPACITY ALLOCATION ALGORITHMS FOR HIERARCHICAL
Stavrakakis, Ioannis
, Vassilios Zissimopoulos, Ioannis Stavrakakis Dep. of Informatics and Telecommunications, University: content distribution; web caching; storage allocation; heuristic algo- rithms. 1. INTRODUCTION This paper on demand distribution). The dimensioning of web caches and content distribution nodes has received a rather
Asynchronous Decentralized Task Allocation for Dynamic Environments
Johnson, Luke B.
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 ...
10 CFR 490.503 - Credit allocation.
Code of Federal Regulations, 2011 CFR
2011-01-01
...DEPARTMENT OF ENERGY ENERGY CONSERVATION ALTERNATIVE FUEL TRANSPORTATION PROGRAM Alternative Fueled Vehicle Credit Program § 490.503...part, DOE shall allocate one credit for each alternative fueled vehicle a fleet or covered...
10 CFR 490.503 - Credit allocation.
Code of Federal Regulations, 2010 CFR
2010-01-01
...DEPARTMENT OF ENERGY ENERGY CONSERVATION ALTERNATIVE FUEL TRANSPORTATION PROGRAM Alternative Fueled Vehicle Credit Program § 490.503...part, DOE shall allocate one credit for each alternative fueled vehicle a fleet or covered...
45 CFR 98.55 - Cost allocation.
Code of Federal Regulations, 2010 CFR
2010-10-01
...55 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION CHILD CARE AND DEVELOPMENT FUND Use of Child Care and Development Funds § 98.55 Cost allocation. (a) The Lead Agency and subgrantees...
Adaptively Parallel Processor Allocation for Cilk Jobs
Sen, Siddhartha
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 ...
40 CFR 74.26 - Allocation formula.
Code of Federal Regulations, 2012 CFR
2012-07-01
...allocation for a combustion source based on the data, corrected... (1) For combustion sources for which the current promulgated SO2 emissions...007 (2) For combustion sources for which the current promulgated SO2...
Fund allocation using capacitated vehicle routing problem
NASA Astrophysics Data System (ADS)
Mamat, Nur Jumaadzan Zaleha; Jaaman, Saiful Hafizah; Ahmad, Rokiah Rozita; Darus, Maslina
2014-09-01
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.
Code of Federal Regulations, 2010 CFR
2010-01-01
...REGULATIONS IMPORTS OF COTTON WOVEN FABRIC § 336.4 Allocation. (a...manufacturer's quantity of imported woven fabrics described under HTS headings 9902...2000, compared to the imports of such fabric by all manufacturers that qualify...
Code of Federal Regulations, 2010 CFR
2010-01-01
...REGULATIONS IMPORTS OF WORSTED WOOL FABRIC § 335.4 Allocation. (a...the proportion of imported Worsted Wool Fabric consumed in the production of Worsted...based on an applicant's Worsted Wool Fabric production, on a weighted average...
45 CFR 98.55 - Cost allocation.
Code of Federal Regulations, 2013 CFR
2013-10-01
...55 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION CHILD CARE AND DEVELOPMENT FUND Use of Child Care and Development Funds § 98.55 Cost allocation. (a) The Lead Agency and subgrantees...
45 CFR 98.55 - Cost allocation.
Code of Federal Regulations, 2012 CFR
2012-10-01
...55 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION CHILD CARE AND DEVELOPMENT FUND Use of Child Care and Development Funds § 98.55 Cost allocation. (a) The Lead Agency and subgrantees...
45 CFR 98.55 - Cost allocation.
Code of Federal Regulations, 2011 CFR
2011-10-01
...55 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION CHILD CARE AND DEVELOPMENT FUND Use of Child Care and Development Funds § 98.55 Cost allocation. (a) The Lead Agency and subgrantees...
45 CFR 98.55 - Cost allocation.
Code of Federal Regulations, 2014 CFR
2014-10-01
...55 Public Welfare Department of Health and Human Services GENERAL ADMINISTRATION CHILD CARE AND DEVELOPMENT FUND Use of Child Care and Development Funds § 98.55 Cost allocation. (a) The Lead Agency and subgrantees...
Allocating the Book Budget: Measuring for Inflation.
ERIC Educational Resources Information Center
Sampson, Gary S.
1978-01-01
A simple algebraic method of compensating for inflation while allocating the book budget by funds is presented. The results of attempts to generate library-resource unit cost figures based on internal measurement of buying patterns are described. (Author)
Code of Federal Regulations, 2014 CFR
2014-10-01
...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,...
Code of Federal Regulations, 2012 CFR
2012-10-01
...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,...
Code of Federal Regulations, 2010 CFR
2010-10-01
...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,...
Code of Federal Regulations, 2011 CFR
2011-10-01
...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,...
Code of Federal Regulations, 2013 CFR
2013-10-01
...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,...
24 CFR 92.50 - Formula allocation.
Code of Federal Regulations, 2010 CFR
2010-04-01
...Secretary, Department of Housing and Urban Development HOME INVESTMENT PARTNERSHIPS PROGRAM Allocation Formula § 92.50 Formula...organizational support, other support for State and local housing strategies, and other purposes authorized by Congress, in...
10 CFR 490.503 - Credit allocation.
Code of Federal Regulations, 2013 CFR
2013-01-01
...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...
10 CFR 490.503 - Credit allocation.
Code of Federal Regulations, 2012 CFR
2012-01-01
...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...
10 CFR 490.503 - Credit allocation.
Code of Federal Regulations, 2014 CFR
2014-01-01
...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...
40 CFR 74.26 - Allocation formula.
Code of Federal Regulations, 2013 CFR
2013-07-01
...74.26 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) SULFUR DIOXIDE OPT-INS Allowance Calculations for Combustion Sources § 74.26 Allocation formula. (a) The...
40 CFR 74.26 - Allocation formula.
Code of Federal Regulations, 2011 CFR
2011-07-01
...74.26 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) SULFUR DIOXIDE OPT-INS Allowance Calculations for Combustion Sources § 74.26 Allocation formula. (a) The...
40 CFR 74.26 - Allocation formula.
Code of Federal Regulations, 2014 CFR
2014-07-01
...74.26 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) SULFUR DIOXIDE OPT-INS Allowance Calculations for Combustion Sources § 74.26 Allocation formula. (a) The...
Decentralized task allocation for dynamic environments
Johnson, Luke B
2012-01-01
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 ...
Code of Federal Regulations, 2010 CFR
2010-10-01
...2010-10-01 false Allocation. 5452.249 Section 5452.249 Federal Acquisition Regulations System DEFENSE LOGISTICS AGENCY, DEPARTMENT OF DEFENSE SOLICITATION PROVISIONS AND CONTRACT CLAUSES Texts of Provisions and Clauses...
Optimal Resource Allocation in Library Systems
ERIC Educational Resources Information Center
Rouse, William B.
1975-01-01
Queueing theory is used to model processes as either waiting or balking processes. The optimal allocation of resources to these processes is defined as that which maximizes the expected value of the decision-maker's utility function. (Author)
40 CFR 74.26 - Allocation formula.
Code of Federal Regulations, 2010 CFR
2010-07-01
...Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) SULFUR DIOXIDE OPT-INS Allowance Calculations for Combustion Sources § 74.26 Allocation formula. (a) The Administrator will...
Code of Federal Regulations, 2012 CFR
2012-01-01
...ADMINISTRATION, DEPARTMENT OF COMMERCE OCEAN AND COASTAL RESOURCE MANAGEMENT COASTAL...regional agencies, interstate entities, or Indian tribes, if the work to result from such...allocated to local governments. (2) Indian Tribes. Tribal participation in...
Code of Federal Regulations, 2014 CFR
2014-01-01
...ADMINISTRATION, DEPARTMENT OF COMMERCE OCEAN AND COASTAL RESOURCE MANAGEMENT COASTAL...regional agencies, interstate entities, or Indian tribes, if the work to result from such...allocated to local governments. (2) Indian Tribes. Tribal participation in...
Code of Federal Regulations, 2013 CFR
2013-01-01
...ADMINISTRATION, DEPARTMENT OF COMMERCE OCEAN AND COASTAL RESOURCE MANAGEMENT COASTAL...regional agencies, interstate entities, or Indian tribes, if the work to result from such...allocated to local governments. (2) Indian Tribes. Tribal participation in...
50 CFR 660.322 - Sablefish allocations.
Code of Federal Regulations, 2010 CFR
2010-10-01
...available to the treaty Indian fisheries before deductions for discard mortality. The annual tribal sablefish allocations are provided...sablefish available for the primary fishery and on estimated discard mortality rates within the fishery. The size of the...
Capacity Allocation with Competitive Retailers Masabumi Furuhata
Zhang, Dongmo
Design, Economics, Management Keywords Allocation mechanism design, game theory, oligopoly 1. INTRODUCTION Mechanism design has been an active research area in economics, management science and operations to uncertainty of market demands, costly capacity construction and time consuming capacity expansion
Adaptive Task and Resource Allocation in MultiAgent Systems
Woolridge, Mike
Adaptive Task and Resource Allocation in MultiAgent Systems S. Shaheen Fatima and Michael. trace allows a col- lection of multi-agent organizations to dynamically allocate tasks and resources) and the resource allocation protocol (rap). The tap allows agents to cooperatively allocate their tasks to other
Memory Allocation Costs in Large C and C++ Programs
David Detlefs; Al Dosser; Benjamin G. Zorn
1994-01-01
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
Task allocation for spatially and temporally distributed tasks
Gini, Maria
is accu- rate, auction based methods achieve better performance. When using auctions to allocate tasksTask allocation for spatially and temporally distributed tasks Julio Godoy and Maria Gini Abstract In multi robot task allocation, a set of tasks has to be allocated to a group of robots while optimizing
Stochastic dynamic programming models for water quality management
NASA Astrophysics Data System (ADS)
Cardwell, Hal; Ellis, Hugh
1993-04-01
This paper presents optimization models for waste load allocation from multiple point sources which include both parameter (Type II) and model (Type I) uncertainty. These optimization models employ more sophisticated water quality simulation models, for example, in the case of dissolved oxygen modeling, QUAL2E and WASP4, than is typically the norm in studies on the optimization of waste load allocation. Variability in selected input parameters to the water quality simulation models gives rise to stochastic dynamic programming approaches. Two types of reliability and feasibility attributes are highlighted, associated with the management options that are generated. Several dissolved oxygen simulation models are incorporated into the optimization procedures to explore the effects of Type I uncertainty on control decisions. Information from simultaneous consideration of multiple simulation models is aggregated in the dynamic programming framework through two regret-based formulations. By accommodating both model and parameter uncertainty in the modeling framework, trade-offs can be generated between the two so as to assess their influence on control decisions. The models are applied to a waste load allocation problem for the Schuylkill River in Pennsylvania.
Activation-induced B cell fates are selected by intracellular stochastic competition.
Duffy, Ken R; Wellard, Cameron J; Markham, John F; Zhou, Jie H S; Holmberg, Ross; Hawkins, Edwin D; Hasbold, Jhagvaral; Dowling, Mark R; Hodgkin, Philip D
2012-01-20
In response to stimulation, B lymphocytes pursue a large number of distinct fates important for immune regulation. Whether each cell's fate is determined by external direction, internal stochastic processes, or directed asymmetric division is unknown. Measurement of times to isotype switch, to develop into a plasmablast, and to divide or to die for thousands of cells indicated that each fate is pursued autonomously and stochastically. As a consequence of competition between these processes, censorship of alternative outcomes predicts intricate correlations that are observed in the data. Stochastic competition can explain how the allocation of a proportion of B cells to each cell fate is achieved. The B cell may exemplify how other complex cell differentiation systems are controlled. PMID:22223740
Optimality versus stability in water resource allocation.
Read, Laura; Madani, Kaveh; Inanloo, Bahareh
2014-01-15
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
A retrodictive stochastic simulation algorithm
NASA Astrophysics Data System (ADS)
Vaughan, T. G.; Drummond, P. D.; Drummond, A. J.
2010-05-01
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.
Functional Methods in Stochastic Systems
Juha Honkonen
2012-10-15
Field-theoretic construction of functional representations of solutions of stochastic differential equations and master equations is reviewed. A generic expression for the generating function of Green functions of stochastic systems is put forward. Relation of ambiguities in stochastic differential equations and in the functional representations is discussed. Ordinary differential equations for expectation values and correlation functions are inferred with the aid of a variational approach.
Stochastic Nature in Cellular Processes
NASA Astrophysics Data System (ADS)
Liu, Bo; Liu, Sheng-Jun; Wang, Qi; Yan, Shi-Wei; Geng, Yi-Zhao; Sakata, Fumihiko; Gao, Xing-Fa
2011-11-01
The importance of stochasticity in cellular processes is increasingly recognized in both theoretical and experimental studies. General features of stochasticity in gene regulation and expression are briefly reviewed in this article, which include the main experimental phenomena, classification, quantization and regulation of noises. The correlation and transmission of noise in cascade networks are analyzed further and the stochastic simulation methods that can capture effects of intrinsic and extrinsic noise are described.
Quantum Stochastic Convolution Cocycles II
J. Martin Lindsay; Adam G. Skalski
2008-01-01
Schürmann’s theory of quantum Lévy 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
The stochastic modeling of elementary psychological processes
Townsend, James T.
. Psychology- Mathematical models. 2. Cognition- Mathematical models. 3. Stochastic processes. I. Ashby, FThe stochastic modeling of elementary psychological processes JAMES T. TOWNSEND Purdue University F. The stochastic modeling of elementary psychological processes. Includes bibliographical references and index. 1
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.
NSDL National Science Digital Library
Harrison, David M.
This website from David M. Harrison of the University of Toronto's physics department provides an animation of the addition of two vectors. Instructors may use this animation in explaining the concept of adding vectors and demonstrating the steps involved.
NSDL National Science Digital Library
Miss Sullivan
2011-10-21
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. ...
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
Allocation of authority in European health policy.
Adolph, Christopher; Greer, Scott L; Massard da Fonseca, Elize
2012-11-01
Although many study the effects of different allocations of health policy authority, few ask why countries assign responsibility over different policies as they do. We test two broad theories: fiscal federalism, which predicts rational governments will concentrate information-intensive operations at lower levels, and redistributive and regulatory functions at higher levels; and "politicized federalism", which suggests a combination of systematic and historically idiosyncratic political variables interfere with efficient allocation of authority. Drawing on the WHO Health in Transition country profiles, we present new data on the allocation of responsibility for key health care policy tasks (implementation, provision, finance, regulation, and framework legislation) and policy areas (primary, secondary and tertiary care, public health and pharmaceuticals) in the 27 EU member states and Switzerland. We use a Bayesian multinomial mixed logit model to analyze how different countries arrive at different allocations of authority over each task and area of health policy, and find the allocation of powers broadly follows fiscal federalism. Responsibility for pharmaceuticals, framework legislation, and most finance lodges at the highest levels of government, acute and primary care in the regions, and provision at the local and regional levels. Where allocation does not follow fiscal federalism, it appears to reflect ethnic divisions, the population of states and regions, the presence of mountainous terrain, and the timing of region creation. PMID:22858423
On Nonlinear Stochastic Balance Laws
NASA Astrophysics Data System (ADS)
Chen, Gui-Qiang; Ding, Qian; Karlsen, Kenneth H.
2012-06-01
We are concerned with multidimensional stochastic balance laws. We identify a class of nonlinear balance laws for which uniform spatial BV bound for vanishing viscosity approximations can be achieved. Moreover, we establish temporal equicontinuity in L 1 of the approximations, uniformly in the viscosity coefficient. Using these estimates, we supply a multidimensional existence theory of stochastic entropy solutions. In addition, we establish an error estimate for the stochastic viscosity method, as well as an explicit estimate for the continuous dependence of stochastic entropy solutions on the flux and random source functions. Various further generalizations of the results are discussed.
NASA Technical Reports Server (NTRS)
Clauson, J.; Heuser, J.
1981-01-01
The Applications Data Service (ADS) is a system based on an electronic data communications network which will permit scientists to share the data stored in data bases at universities and at government and private installations. It is designed to allow users to readily locate and access high quality, timely data from multiple sources. The ADS Pilot program objectives and the current plans for accomplishing those objectives are described.
Stability analysis of multi-group deterministic and stochastic epidemic models with vaccination rate
NASA Astrophysics Data System (ADS)
Wang, Zhi-Gang; Gao, Rui-Mei; Fan, Xiao-Ming; Han, Qi-Xing
2014-09-01
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.
Risk Allocation Strategies for Distributed Chance-Constrained Task Allocation Sameera S. Ponda-agent multi-task mis- sions, this paper presents a framework for risk allocation and proposes several vehicles (UAVs/UGVs), has motivated the development of autonomous task allocation and planning methods
Allocating timber to mills based on stand and mill characteristics
Rodgers, Joseph Adam
1987-01-01
set where all stems are classified by butt diameter and where whole bucked stems can be allocated as two completely separate stems. 4. Develop a timber allocation algorithm for directing the flow of timber to mills so that the potential economic... purchases and sales into the allocation schedule. The final submodule prints information about the allocation. The output generated falls into two categories. The first category is a listing of the allocations describing which mill receives which timber...
Clonidine added to bupivacaine-epinephrine-sufentanil improves epidural analgesia during childbirth
Brigitte Claes; Maurits Soetens; André Van Zundert; Sanjay Datta
1998-01-01
Background and Objectives. A double-blind study was conducted to assess the efficacy and the side effects of a low dose of clonidine added to an epidural injection of bupivacaine and epinephrine, with or without sufentanil. Methods. One hundred healthy parturients (ASA 1) were randomly allocated into four groups according to the type of epidural analgesia administered. The bupivacaine\\/epinephrine (BE) group
Value-Added Measures for Schools in England: Looking inside the "Black Box" of Complex Metrics
ERIC Educational Resources Information Center
Kelly, Anthony; Downey, Christopher
2010-01-01
Value-added measures can be used to allocate funding to schools, to identify those institutions in need of special attention and to underpin government guidance on targets. In England, there has been a tendency to include in these measures an ever-greater number of contextualising variables and to develop ever-more complex models that encourage…
Connectivity in vehicular ad hoc networks in presence of wireless mobile base-stations
. Keywords: VANETs, Connectivity, Base-stations, Infinite Server Queuing System. I. INTRODUCTION Vehicular Ad and industry commu- nity. The US FCC has allocated seven 10 MHZ channels in the 5.9 GHz band for Dedicated. The relationship between basic parameters in traffic theory challenges. So in a near future, vehicles may benefit
Nonlinear Realization of Supersymmetric AdS Space Isometries
T. E. Clark; S. T. Love
2005-10-31
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.
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
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.
Joint Buffer & Server Allocation Van Woensel et al. Buffer and Server Allocation in General
Cruz, Frederico
Joint Buffer & Server Allocation Van Woensel et al. Buffer and Server Allocation in General Multi 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
ERIC Educational Resources Information Center
Lyons, Lucy Eleonore; Blosser, John
2012-01-01
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…
Who Allocated My Memory? Detecting Custom Memory Allocators in C Binaries
Bos, Herbert
, they interpose on the system's malloc and free functions, and track each chunk of memory thus allocated as a data management API, and as a result perform an analysis of the actual application specific data structures allocated on the heap [1][5]. Typ- ically, they interpose on the system's malloc and free functions
Criteria for Car Parking Allocation System Criteria for Car Parking Allocation System
Mottram, Nigel
Criteria for Car Parking Allocation System Criteria for Car Parking Allocation System 2014-15 Criteria for Car Parking All #12;The issue and control of car parking permits is vested in Estates Services. The annual charges are incorporated in the application form. The car parking charges will be deducted from
Stochastic Physicochemical Dynamics
NASA Astrophysics Data System (ADS)
Tsekov, R.
2001-02-01
Thermodynamic Relaxation in Quantum Systems: A new approach to quantum Markov processes is developed and the corresponding Fokker-Planck equation is derived. The latter is examined to reproduce known results from classical and quantum physics. It was also applied to the phase-space description of a mechanical system thus leading to a new treatment of this problem different from the Wigner presentation. The equilibrium probability density obtained in the mixed coordinate-momentum space is a reasonable extension of the Gibbs canonical distribution. The validity of the Einstein fluctuation-dissipation relation is discussed in respect to the type of relaxation in an isothermal system. The first model, presuming isothermic fluctuations, leads to the Einstein formula. The second model supposes adiabatic fluctuations and yields another relation between the diffusion coefficient and mobility of a Brownian particle. A new approach to relaxations in quantum systems is also proposed that demonstrates applicability only of the adiabatic model for description of the quantum Brownian dynamics. Stochastic Dynamics of Gas Molecules: A stochastic Langevin equation is derived, describing the thermal motion of a molecule immersed in a rested fluid of identical molecules. The fluctuation-dissipation theorem is proved and a number of correlation characteristics of the molecular Brownian motion are obtained. A short review of the classical theory of Brownian motion is presented. A new method is proposed for derivation of the Fokker-Planck equations, describing the probability density evolution, from stochastic differential equations. It is also proven via the central limit theorem that the white noise is only Gaussian. The applicability of stochastic differential equations to thermodynamics is considered and a new form, different from the classical Ito and Stratonovich forms, is introduced. It is shown that the new presentation is more appropriate for the description of thermodynamic fluctuations. The range of validity of the Boltzmann-Einstein principle is also discussed and a generalized alternative is proposed. Both expressions coincide in the small fluctuation limit, providing a normal distribution density. Fluctuation Stability of Thin Liquid Films: Memory effect of Brownian motion in an incompressible fluid is studied. The reasoning is based on the Mori-Zwanzig formalism and a new formulation of the Langevin force as a result of collisions between an effective and the Brownian particles. Thus, the stochastic force autocorrelation function with finite dispersion and the corresponding Brownian particle velocity autocorrelation function are obtained. It is demonstrated that the dynamic structure is very important for the rate of drainage of a thin liquid film and it can be effectively taken into account by a dynamic fractal dimension. It is shown that the latter is a powerful tool for description of the film drainage and classifies all the known results from the literature. The obtained general expression for the thinning rate is a heuristic one and predicts variety of drainage models, which are even difficult to simulate in practice. It is a typical example of a scaling law, which explains the origin of the complicate dependence of the thinning rate on the film radius. On the basis of the theory of stochastic processes the evolution of the spatial correlation function of the surface waves on a thin liquid film as well as the corresponding root mean square amplitude A(t) and number of uncorrelated subdomains N(t) are obtained. A formulation of the life time of unstable nonthinning films is proposed, based on the evolution of A and N. It is shown that the presence of uncorrelated subdomains shortens the life time of the film. Some numerical results for A(t) and N(t) at different film thicknesses h and areas S, are demonstrated, taking into account only van der Waals and capillary forces. Resonant Diffusion in Molecular Solid Structures: A new approach to Brownian motion of atomic clusters on solid surfaces is developed. The main topic discu
Stochastic Isometries in Quantum Mechanics
Paul Busch
2013-03-26
The class of stochastic maps, that is, linear, trace-preserving, positive maps between the self-adjoint trace class operators of complex separable Hilbert spaces plays an important role in the representation of reversible dynamics and symmetry transformations. Here a characterization of the isometric stochastic maps is given and possible physical applications are indicated.
Stochastic ontogenetic growth model
NASA Astrophysics Data System (ADS)
West, B. J.; West, D.
2012-02-01
An ontogenetic growth model (OGM) for a thermodynamically closed system is generalized to satisfy both the first and second law of thermodynamics. The hypothesized stochastic ontogenetic growth model (SOGM) is shown to entail the interspecies allometry relation by explicitly averaging the basal metabolic rate and the total body mass over the steady-state probability density for the total body mass (TBM). This is the first derivation of the interspecies metabolic allometric relation from a dynamical model and the asymptotic steady-state distribution of the TBM is fit to data and shown to be inverse power law.
NASA Astrophysics Data System (ADS)
Eliazar, Iddo I.; Shlesinger, Michael F.
2012-01-01
We introduce and explore a Stochastic Flow Cascade (SFC) model: A general statistical model for the unidirectional flow through a tandem array of heterogeneous filters. Examples include the flow of: (i) liquid through heterogeneous porous layers; (ii) shocks through tandem shot noise systems; (iii) signals through tandem communication filters. The SFC model combines together the Langevin equation, convolution filters and moving averages, and Poissonian randomizations. A comprehensive analysis of the SFC model is carried out, yielding closed-form results. Lévy laws are shown to universally emerge from the SFC model, and characterize both heavy tailed retention times (Noah effect) and long-ranged correlations (Joseph effect).
Nonparametric Bayes Stochastically Ordered Latent Class Models
Yang, Hongxia; O’Brien, Sean; Dunson, David B.
2012-01-01
Latent class models (LCMs) are used increasingly for addressing a broad variety of problems, including sparse modeling of multivariate and longitudinal data, model-based clustering, and flexible inferences on predictor effects. Typical frequentist LCMs require estimation of a single finite number of classes, which does not increase with the sample size, and have a well-known sensitivity to parametric assumptions on the distributions within a class. Bayesian nonparametric methods have been developed to allow an infinite number of classes in the general population, with the number represented in a sample increasing with sample size. In this article, we propose a new nonparametric Bayes model that allows predictors to flexibly impact the allocation to latent classes, while limiting sensitivity to parametric assumptions by allowing class-specific distributions to be unknown subject to a stochastic ordering constraint. An efficient MCMC algorithm is developed for posterior computation. The methods are validated using simulation studies and applied to the problem of ranking medical procedures in terms of the distribution of patient morbidity. PMID:22505787
Variance decomposition in stochastic simulators
NASA Astrophysics Data System (ADS)
Le Maître, O. P.; Knio, O. M.; Moraes, A.
2015-06-01
This work aims at the development of a mathematical and computational approach that enables quantification of the inherent sources of stochasticity and of the corresponding sensitivities in stochastic simulations of chemical reaction networks. The approach is based on reformulating the system dynamics as being generated by independent standardized Poisson processes. This reformulation affords a straightforward identification of individual realizations for the stochastic dynamics of each reaction channel, and consequently a quantitative characterization of the inherent sources of stochasticity in the system. By relying on the Sobol-Hoeffding decomposition, the reformulation enables us to perform an orthogonal decomposition of the solution variance. Thus, by judiciously exploiting the inherent stochasticity of the system, one is able to quantify the variance-based sensitivities associated with individual reaction channels, as well as the importance of channel interactions. Implementation of the algorithms is illustrated in light of simulations of simplified systems, including the birth-death, Schlögl, and Michaelis-Menten models.
NETCORD: a cord blood allocation network.
Hakenberg, P; Kögler, G; Wernet, P
1998-07-01
Several CB-specific prerequisites have to be taken into consideration to deal with the increasing number of stem cell transplants using multiple HLA mismatched umbilical cord blood (CB) specimens. Since CB represents a limited and expensive resource it demands an optimal allocation. Optimal CB allocation can not be optimal based solely on 'first come - first serve' basis, since frequently several CB specimens are simultaneously suitable for more than one patient. Furthermore, the immediate availability of CB gives rise to an above average proportion of urgent search requests for patients who need a transplantation urgently. Thus continuing reservation and release of a CB specimen has considerable influence on the stem cell transplant prospects of other patients. To avoid and/or solve allocation conflicts present in a much higher incidence than in the bone marrow donor setting a global co-ordinated allocation of cord blood specimens is of major advantage for these patients. Therefore, the CB allocation network NETCORD has been founded. Within NETCORD common rules for data representation and logistics were developed to make CB data comparable and interchangeable. The extended need for fast and reliable communication is met by modern communication technology based on Internet standards. PMID:9715876
Stochastic Theory of Relativistic Quantum Mechanics
Maurice Godart
2014-12-03
The stochastic theory of relativistic quantum mechanics presented here is modelled on the one that has been proposed previously and that was claimed to be a promising substitute to the orthodox theory in the non-relativistic domain. So it also relies heavily upon the theory of stochastic processes, with its definitions, theorems and specific vocabulary as well. Its main hypothesis states indeed that the classical trajectories of the particles are identical to the sample functions of a diffusion Markov process, whose conditional probability density is proposed as a substitute for the wave function. Along the way, we introduce ad hoc hypotheses for the sole reason that they facilitate and even make possible the further development of the theory. These and the so-called Nelson equations are used to determine the drift vectors and the diffusion tensor characteristic of such a process. It is then possible to write down the Fokker-Planck and Kolmogorov equations that can be used to determine the normal and conditional probability densities. This logical sequence of steps leads to the solution of specific problems and we apply it to the special case of the free particle.
Digital image steganography using stochastic modulation
NASA Astrophysics Data System (ADS)
Fridrich, Jessica; Goljan, Miroslav
2003-06-01
In this paper, we present a new steganographic paradigm for digital images in raster formats. Message bits are embedded in the cover image by adding a weak noise signal with a specified but arbitrary probabilistic distribution. This embedding mechanism provides the user with the flexibility to mask the embedding distortion as noise generated by a particular image acquisition device. This type of embedding will lead to more secure schemes because now the attacker must distinguish statistical anomalies that might be created by the embedding process from those introduced during the image acquisition itself. Unlike previously proposed schemes, this new approach, that we call stochastic modulation, achieves oblivious data transfer without using noise extraction algorithms or error correction. This leads to higher capacity (up to 0.8 bits per pixel) and a convenient and simple implementation with low embedding and extraction complexity. But most importantly, because the embedding noise can have arbitrary properties that approximate a given device noise, the new method offers better security than existing methods. At the end of this paper, we extend stochastic modulation to a content-dependent device noise and we also discuss possible attacks on this scheme based on the most recent advances in steganalysis.
Unknown
2011-08-17
ezi. sts in tbe supplement. Nost methods presently used to determine the availability of phosphorus from a certain souxce employ either practical or purified diets to which the test supplement is added to supply graded levels of phosphorus... they observed that at 4 weeks of age the total phosphorus requirement was 0. 55K for chicks end 0. 80'%%d for turkey poults when dicalcium phosphate was the supplement. These values were found to be composed to 0. 25K added inorganic phosphorus for chicks...
Stochastic Resonance in On-Off Intermittency
NASA Astrophysics Data System (ADS)
Krawiecki, A.
1998-06-01
Stochastic resonance (SR) is studied in chaotic systems exhibiting on-off intermittency (OOI). They include a discrete-time system --- the logistic map with the control parameter varying randomly in time and a continuous-time system --- chaotic oscillators just below the synchroniation threshold. As a weak additive or multiplicative periodic forcing is added to such systems, the signal-to-noise ratio (SNR) exhibits a maximum as a function of the intermittency control parameter. In all cases SNR shows dependence on the forcing frequency. In the case of additive periodic forcing in continuous-time systems a distinct minimum of SNR is observed when the periodic forcing frequency is close to the characteristic frequency of chaotic oscillations of the system. In the case of multiplicative periodic forcing this dependence retains even for very small frequencies; this is a result of a very long characteristic time scale, typical of systems with OOI.
Hard harvesting of a stochastically changing population.
Gan, Xinjun; Waxman, David
2015-09-01
We consider a population whose size changes stochastically under a branching process, with the added modification that each generation a fixed number of individuals are removed, irrespective of the size of the population. We call removal that is independent of population size 'hard harvesting'. A key feature of hard harvesting occurs if the size of the population is smaller than the fixed number that are harvested. In such a case, the dynamics cannot continue and must terminate. We find that even for populations with a tendency to grow, there is a finite probability of termination. We determine the probability of termination, and given that termination occurs, we characterise the statistical properties of the random time to termination. We determine the impact of hard harvesting on the size of the population, in populations where termination has not occurred. PMID:26094592
A stochastic multi-symplectic scheme for stochastic Maxwell equations with additive noise
Hong, Jialin; Zhang, Liying
2014-07-01
In this paper we investigate a stochastic multi-symplectic method for stochastic Maxwell equations with additive noise. Based on the stochastic version of variational principle, we find a way to obtain the stochastic multi-symplectic structure of three-dimensional (3-D) stochastic Maxwell equations with additive noise. We propose a stochastic multi-symplectic scheme and show that it preserves the stochastic multi-symplectic conservation law and the local and global stochastic energy dissipative properties, which the equations themselves possess. Numerical experiments are performed to verify the numerical behaviors of the stochastic multi-symplectic scheme.
Stochastic morphological evolution equations
NASA Astrophysics Data System (ADS)
Kloeden, Peter E.; Lorenz, Thomas
The inadequacy of locally defined set-valued differential equations to describe the evolution of shapes and morphological forms in biology, which are usually neither convex or nondecreasing, was recognised by J.-P. Aubin, who introduced morphological evolution equations, which are essentially nonlocally defined set-valued differential equations with the inclusion vector field also depending on the entire reachable set. This concept is extended here to the stochastic setting of set-valued Itô evolution equations in Hilbert spaces. Due to the nonanticipative nature of Itô calculus, the evolving reachable sets are nonanticipative nonempty closed random sets. The existence of solutions and their dependence on initial data are established. The latter requires the introduction of a time-oriented semi-metric in time-space variables. As a consequence the stochastic morphological evolution equations generate a deterministic nonautonomous dynamical system formulated as a two-parameter semigroup with the complication that the random subsets take values in different spaces at different time instances due to the nonanticipativity requirement. It is also shown how nucleation processes can be handled in this conceptual framework.
Stochastic power flow modeling
Not Available
1980-06-01
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.
Da pattern ad analizzatore lessicale Da pattern ad analizzatore lessicale
Rossi, Francesca
Da pattern ad analizzatore lessicale Da pattern ad analizzatore lessicale #12;Da espressioni regolari ad automa Una espressione regolare per ogni pattern Da ogni espressione regolare, un NFA pattern abb prendiamo la stringa piu' lunga che vada bene per abb Da pattern ad analizzatore lessicale
New Supersymmetric AdS_6 via T-duality
Lozano, Yolanda; Rodriguez-Gomez, Diego; Sfetsos, Konstadinos
2012-01-01
We present a new supersymmetric AdS_6 solution of type IIB supergravity with SU(2) isometry. This solution is the result of a non-Abelian T-duality on the known supersymmetric AdS_6 solution of massive IIA. The SU(2) R-symmetry is untouched, leading to sixteen supercharges and preserved supersymmetry.
Tomè, Elisabetta; Tagliavini, Massimo; Scandellari, Francesca
2015-05-01
Most crop species form a symbiotic association with arbuscular mycorrhizal (AM) fungi, receiving plant photosynthate and exchanging nutrients from the soil. The plant carbon (C) allocation to AM fungi and the nitrogen feedback are rarely studied together. In this study, a dual (13)CO2 and (15)NH4(15)NO3 pulse labeling experiment was carried out to determine the allocation of recent photosynthates to mycorrhizal hyphae and the translocation of N absorbed by hyphae to strawberry plants. Plants were grown in pots in which a 50 ?m mesh net allowed the physical separation of the mycorrhizal hyphae from the roots in one portion of the pot. An inorganic source of (15)N was added to the hyphal compartment at the same time of the (13)CO2 pulse labeling. One and seven days after pulse labeling, the plants were destructively harvested and the amount of the recently fixed carbon (C) and of the absorbed N was determined. (13)C allocated to belowground organs such as roots and mycorrhizal hyphae accounted for an average of 10%, with 4.3% allocated to mycorrhizal hyphae within the first 24h after the pulse labeling. Mycorrhizae absorbed labeled inorganic nitrogen, of which almost 23% was retained in the fungal mycelium. The N uptake was linearly correlated with the (13)C fixed by the plants suggesting a positive correlation between a plant photosynthetic rate and the hyphal absorption capacity. PMID:25841208
A decision support system for tolerance allocation
NASA Astrophysics Data System (ADS)
Pulat, Pakize Simin; Raman, Shivakumar
1993-08-01
Tolerance design for discrete parts requires extensive data, handbooks and/or complex mathematical models. Decision support expert systems are needed that integrate such information to simplify tolerance design. In this research, user-friendly decision support tools for automated tolerance allocation and tolerance analysis are developed. The tolerance allocation prototype can provide component tolerances based on assembly specification. Handbook-based tolerances or optimal tolerances can be designed based on user interaction. Tolerance analysis determines the assembly tolerance for a given chain of component tolerances based on different analysis models and a decision-chart. Other research conducted include a methodology for indirect tolerance transfer to manufacturing and a new methodology for simultaneous process selection and tolerance allocation.
Task mapping for non-contiguous allocations.
Leung, Vitus Joseph; Bunde, David P.; Ebbers, Johnathan; Price, Nicholas W.; Swank, Matthew; Feer, Stefan P.; Rhodes, Zachary D.
2013-02-01
This paper examines task mapping algorithms for non-contiguously allocated parallel jobs. Several studies have shown that task placement affects job running time for both contiguously and non-contiguously allocated jobs. Traditionally, work on task mapping either uses a very general model where the job has an arbitrary communication pattern or assumes that jobs are allocated contiguously, making them completely isolated from each other. A middle ground between these two cases is the mapping problem for non-contiguous jobs having a specific communication pattern. We propose several task mapping algorithms for jobs with a stencil communication pattern and evaluate them using experiments and simulations. Our strategies improve the running time of a MiniApp by as much as 30% over a baseline strategy. Furthermore, this improvement increases markedly with the job size, demonstrating the importance of task mapping as systems grow toward exascale.
Die allocation optimization for yield improvement
NASA Astrophysics Data System (ADS)
Ortega, Carlos; Recio, Miguel; Urquia, Alfonso; Sanchez, Guillermo; Nogal, Ubaldo; Badillo, Alfonso
1997-09-01
The way in which dies are allocated within a wafer is the subject of this paper. Standard ways of doing it are based on a software program, mainly in-house built, that uses default values for all the variables and do not take into account, in a direct mode, the actual distribution of yield versus distance to wafer edge in the manufacturing line where the chip is to be manufactured. We present a novel Software System for die allocation in the wafer, that uses an empirically obtained Yield Distribution Function (which gives the normalized yield for every X Y coordinate over the entire wafer area). The software developed gives as output the optimum die allocation in terms of yield.
Biomass Resource Allocation among Competing End Uses
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
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.
Andrea Materschläger; Konrad Bergmeister
SUMMARY Extensive research is currently going on to evaluate and quantify advantages of fiber added concrete in general civil applications. Different fiber additives can be combined with concrete to design for specific applications and optimize mechanical properties. It is anticipated that the new material shows an increased ductility, higher compressive strength and\\/or anisotropic stiffness values. Thus, applications of these materials
ERIC Educational Resources Information Center
Richards, Andrew
2015-01-01
Two quantitative measures of school performance are currently used, the average points score (APS) at Key Stage 2 and value-added (VA), which measures the rate of academic improvement between Key Stage 1 and 2. These figures are used by parents and the Office for Standards in Education to make judgements and comparisons. However, simple…
HUMANSCIENCES ADDING A TECHNOLOGICAL
Heller, Barbara
Shapiro) · New media technologies, digital culture, and video game design, including gender and violence in video games (Carly Kocurek) · The development of communication among infants; statistical methodsIIT LEWIS COLLEGE OF HUMANSCIENCES ADDING A TECHNOLOGICAL FOCUS TO THE STUDY OF PSYCHOLOGY, SOCIAL
Pathologies in Lovelock AdS Black Branes and AdS/CFT
Tomohiro Takahashi; Jiro Soda
2011-08-25
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.
Entropy, Stochastic Matrices, and Quantum Operations
Lin Zhang
2013-02-22
The goal of the present paper is to derive some conditions on saturation of (strong) subadditivity inequality for the stochastic matrices. The notion of relative entropy of stochastic matrices is introduced by mimicking quantum relative entropy. Some properties of this concept are listed and the connection between the entropy of the stochastic quantum operations and that of stochastic matrices are discussed.
Stochastic OPL Cork Constraint Computation Centre
Walsh, Toby
Stochastic OPL Toby Walsh Cork Constraint Computation Centre Cork Ireland tw@4c.ucc.ie 1st May 2002 "stochastic constraint programming" [3]. This extends con- straint programming with stochastic variables an extension of constraint programming called stochastic constraint programming [3] in which we distinguish
Stochastic OPL Cork Constraint Computation Centre
Walsh, Toby
Stochastic OPL Toby Walsh Cork Constraint Computation Centre Cork Ireland tw@4c.ucc.ie 1st May 2002 ``stochastic constraint programming'' [3]. This extends con straint programming with stochastic variables an extension of constraint programming called stochastic constraint programming [3] in which we distinguish
Stochastic averaging of BALAJI DEVARAJU, Nico Sneeuw
Stuttgart, Universität
Stochastic averaging of GRACE data BALAJI DEVARAJU, Nico Sneeuw Geod¨atisches Institut der deterministic (Gaussian) or stochastic (Wiener), and at the same time isotropic or anisotropic. Stochastic op operators depend on an averaging radius. To per- form stochastic averaging the desired signal struc- ture
Supersymmetric AdS6 via T duality.
Lozano, Y; Colgáin, E Ó; Rodríguez-Gómez, D; Sfetsos, K
2013-06-01
We present a new supersymmetric AdS(6) solution of type IIB supergravity with SU(2) isometry. Through the AdS/CFT correspondence, this has potentially very interesting implications for 5D fixed point theories. This solution is the result of a non-Abelian T duality on the known supersymmetric AdS(6) solution of massive IIA. The SU(2) R symmetry is untouched, leading to sixteen supercharges and preserved supersymmetry. PMID:25167481
Criteria for fairly allocating scarce health-care resources to genetic tests: which matter most?
Rogowski, Wolf H; Grosse, Scott D; Schmidtke, Jörg; Marckmann, Georg
2014-01-01
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
Improving locality with dynamic memory allocation
Jula, Alin Narcis
2009-05-15
LOCALITY WITH DYNAMIC MEMORY ALLOCATION A Dissertation by ALIN JULA Submitted to the O ce of Graduate Studies of Texas A&M University in partial ful llment of the requirements for the degree of DOCTOR OF PHILOSOPHY August 2008 Major Subject: Computer... Science IMPROVING LOCALITY WITH DYNAMIC MEMORY ALLOCATION A Dissertation by ALIN JULA Submitted to the O ce of Graduate Studies of Texas A&M University in partial ful llment of the requirements for the degree of DOCTOR OF PHILOSOPHY Approved by: Chair...
Stochastic Robustness: Towards a Comprehensive Robustness Tool
NASA Technical Reports Server (NTRS)
Ray, Laurie Ryan
1990-01-01
Stochastic robustness is a simple technique to determine the robustness of linear, time-invariant systems by Monte Carlo methods. Stochastic stability robustness has been described previously. Those results are extended here to provide insight into control system design for performance. Together, stochastic stability and performance robustness concepts constitute a comprehensive tool that can be used to analyze control system robustness properties. As well, they offer control system design insight that can set the stage for stochastic robustness synthesis. The concept of stochastic stability robustness is reviewed, stochastic performance robustness is introduced, and stochastic robustness synthesis is described qualitatively. Confidence intervals necessary for comparing control laws statistically are presented.
On square-wave-driven stochastic resonance for energy harvesting in a bistable system
NASA Astrophysics Data System (ADS)
Su, Dongxu; Zheng, Rencheng; Nakano, Kimihiko; Cartmell, Matthew P.
2014-11-01
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.
Stochastic Resonance: from climate to biology
Roberto Benzi
2007-02-05
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.
Stochastic bridges of linear systems
Yongxin Chen; Tryphon Georgiou
2014-07-12
We study a generalization of the Brownian bridge as a stochastic process that models the position and velocity of inertial particles between the two end-points of a time interval. The particles experience random acceleration and are assumed to have known states at the boundary. Thus, the movement of the particles can be modeled as an Ornstein-Uhlenbeck process conditioned on position and velocity measurements at the two end-points. It is shown that optimal stochastic control provides a stochastic differential equation (SDE) that generates such a bridge as a degenerate diffusion process. Generalizations to higher order linear diffusions are considered.
Stochastic reinforcement benefits skill acquisition
Dayan, Eran; Averbeck, Bruno B.; Richmond, Barry J.; Cohen, Leonardo G.
2014-01-01
Learning complex skills is driven by reinforcement, which facilitates both online within-session gains and retention of the acquired skills. Yet, in ecologically relevant situations, skills are often acquired when mapping between actions and rewarding outcomes is unknown to the learning agent, resulting in reinforcement schedules of a stochastic nature. Here we trained subjects on a visuomotor learning task, comparing reinforcement schedules with higher, lower, or no stochasticity. Training under higher levels of stochastic reinforcement benefited skill acquisition, enhancing both online gains and long-term retention. These findings indicate that the enhancing effects of reinforcement on skill acquisition depend on reinforcement schedules. PMID:24532838
Stochastic thermodynamics of entropic transport
Matteo Smerlak
2012-11-29
Seifert derived an exact fluctuation relation for diffusion processes using the concept of "stochastic system entropy". In this note we extend his formalism to entropic transport. We introduce the notion of relative stochastic entropy, or "relative surprisal", and use it to generalize Seifert's system/medium decomposition of the total entropy. This result allows to apply the concepts of stochastic thermodynamics to diffusion processes in confined geometries, such as ion channels, cellular pores or nanoporous materials. It can be seen as the equivalent for diffusion processes of Esposito and Schaller's generalized fluctuation theorem for "Maxwell demon feedbacks".
A Stochastic Programming Framework for Optimal Storage Bidding in Energy and Reserve Markets
Mohsenian-Rad, Hamed
: Independent storage systems, energy and reserve markets, wind power integration, stochastic optimization I electricity market. The existing literature on integrating energy storage systems into smart grid is diverse that it will be the owners of a wind farm who will pay and invest in adding storage units to a power This work was supported
Sun, Zhi-Yuan; Gao, Yi-Tian; Yu, Xin; Liu, Ying
2012-12-01
We investigate the dynamics of the bound vector solitons (BVSs) for the coupled nonlinear Schro?dinger equations with the nonhomogenously stochastic perturbations added on their dispersion terms. Soliton switching (besides soliton breakup) can be observed between the two components of the BVSs. Rate of the maximum switched energy (absolute values) within the fixed propagation distance (about 10 periods of the BVSs) enhances in the sense of statistics when the amplitudes of stochastic perturbations increase. Additionally, it is revealed that the BVSs with enhanced coherence are more robust against the perturbations with nonhomogenous stochasticity. Diagram describing the approximate borders of the splitting and non-splitting areas is also given. Our results might be helpful in dynamics of the BVSs with stochastic noises in nonlinear optical fibers or with stochastic quantum fluctuations in Bose-Einstein condensates. PMID:23278067
Mixed Membership Stochastic Blockmodels
Airoldi, Edoardo M.; Blei, David M.; Fienberg, Stephen E.; Xing, Eric P.
2008-01-01
Observations consisting of measurements on relationships for pairs of objects arise in many settings, such as protein interaction and gene regulatory networks, collections of author-recipient email, and social networks. Analyzing such data with probabilisic models can be delicate because the simple exchangeability assumptions underlying many boilerplate models no longer hold. In this paper, we describe a latent variable model of such data called the mixed membership stochastic blockmodel. This model extends blockmodels for relational data to ones which capture mixed membership latent relational structure, thus providing an object-specific low-dimensional representation. We develop a general variational inference algorithm for fast approximate posterior inference. We explore applications to social and protein interaction networks. PMID:21701698
Stochastization in gravitating systems
NASA Astrophysics Data System (ADS)
Ovod, D. V.; Ossipkov, L. P.
2013-10-01
We discuss the effective stochastization time ?_e for gravitating systems in terms of the Krylov and Gurzadyan-Savvidi paradigm. The truncated Holtsmark distribution for a random force proposed by Rastorguev and Sementsov implies {?_e/?_c ? N0.20}, where ?_c is the crossing time. We find in the case of the Petrovskaya distribution for a random force {?_e/?_c ? Nk}, where {k=0.27}-0.31, depending on the oblateness and rotation of the system, and {?_e/?_c ? N1/3/(ln N)1/2} when N? 1. The latter result agrees with those of Genkin (1969) and Gurzadyan & Kocharyan (2009) (k=1/3). Dedicated to Igor L'vovich Genkin (1931-2011)
A. Greco; S. Perri; G. Zimbardo; L. M. Zelenyi
2009-01-01
This work is devoted to investigate the interaction between protons and stochastic time-dependent electromagnetic fields generated by oscillating clouds of finite size, randomly positioned in the x–y-plane. The geometry of the system is two-dimensional and, beside the time-dependent electromagnetic fluctuations, a steady-state, dawn-dusk electric field, Ey, has been added along the y-direction. The simultaneous presence of the stochastic time-dependent fluctuations
30 CFR 206.459 - Allocation of washed coal.
Code of Federal Regulations, 2010 CFR
2010-07-01
... 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...
30 CFR 1206.260 - Allocation of washed coal.
Code of Federal Regulations, 2011 CFR
2011-07-01
...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...
30 CFR 206.260 - Allocation of washed coal.
Code of Federal Regulations, 2010 CFR
2010-07-01
... 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...
30 CFR 1206.459 - Allocation of washed coal.
Code of Federal Regulations, 2011 CFR
2011-07-01
...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...
47 CFR 64.901 - Allocation of costs.
Code of Federal Regulations, 2010 CFR
2010-10-01
...possible, common cost categories are to be allocated based upon direct analysis of the origin of the cost themselves. (ii) When direct analysis is not possible, common cost categories shall be allocated based upon an indirect,...
Cooperative Decentralized Resource Allocation in Heterogeneous Wireless Access Medium
Zhuang, Weihua
]. A very important component of the integrated architecture is radio resource management mechanisms studied the problem of radio resource allocation in a heterogeneous wireless access medium. Two types1 Cooperative Decentralized Resource Allocation in Heterogeneous Wireless Access Medium Muhammad
14 CFR 93.215 - Initial allocation of slots.
Code of Federal Regulations, 2010 CFR
2010-01-01
...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...
14 CFR 93.215 - Initial allocation of slots.
Code of Federal Regulations, 2011 CFR
2011-01-01
...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...
THE 1985 NAPAP EMISSIONS INVENTORY: DEVELOPMENT OF SPECIES ALLOCATION FACTORS
The report describes the methodologies and data bases used to develop species allocation factors and data processing software used to develop the 1985 National Acid Precipitation Assessment Program (NAPAP) Modelers' Emissions Inventory (Version 2). Species allocation factors were...
77 FR 26698 - Allocation of Mortgage Insurance Premiums
Federal Register 2010, 2011, 2012, 2013, 2014
2012-05-07
...1545-BH84 Allocation of Mortgage Insurance Premiums AGENCY: Internal Revenue Service (IRS...allocate prepaid qualified mortgage insurance premiums to determine the amount of the prepaid premium that is treated as qualified residence...
Evaluation of non-cubic processor allocation in hybercubes
Shah, Kuntal
1996-01-01
the processors. Whereas, cubic and contiguous allocation of processors in Hypercube has been well studied, non-cubic and non-contiguous allocations have been largely neglected because of potential message-contention and larger number of hops between source...
12 CFR 327.53 - Allocation and payment of dividends.
Code of Federal Regulations, 2010 CFR
2010-01-01
... Allocation and payment of dividends. 327.53 Section 327...REGULATIONS AND STATEMENTS OF GENERAL POLICY ASSESSMENTS Implementation of Dividend Requirements § 327.53 Allocation and payment of dividends. (a)(1) The...
34 CFR 300.807 - Allocations to States.
Code of Federal Regulations, 2013 CFR
2013-07-01
...REHABILITATIVE SERVICES, DEPARTMENT OF EDUCATION ASSISTANCE TO STATES FOR THE EDUCATION OF CHILDREN WITH DISABILITIES Preschool Grants for Children with Disabilities § 300.807 Allocations to States. The Secretary allocates the amount...
34 CFR 300.807 - Allocations to States.
Code of Federal Regulations, 2014 CFR
2014-07-01
...REHABILITATIVE SERVICES, DEPARTMENT OF EDUCATION ASSISTANCE TO STATES FOR THE EDUCATION OF CHILDREN WITH DISABILITIES Preschool Grants for Children with Disabilities § 300.807 Allocations to States. The Secretary allocates the amount...
34 CFR 300.807 - Allocations to States.
Code of Federal Regulations, 2011 CFR
2011-07-01
...REHABILITATIVE SERVICES, DEPARTMENT OF EDUCATION ASSISTANCE TO STATES FOR THE EDUCATION OF CHILDREN WITH DISABILITIES Preschool Grants for Children with Disabilities § 300.807 Allocations to States. The Secretary allocates the amount...
34 CFR 300.807 - Allocations to States.
Code of Federal Regulations, 2012 CFR
2012-07-01
...REHABILITATIVE SERVICES, DEPARTMENT OF EDUCATION ASSISTANCE TO STATES FOR THE EDUCATION OF CHILDREN WITH DISABILITIES Preschool Grants for Children with Disabilities § 300.807 Allocations to States. The Secretary allocates the amount...
34 CFR 300.807 - Allocations to States.
Code of Federal Regulations, 2010 CFR
2010-07-01
...REHABILITATIVE SERVICES, DEPARTMENT OF EDUCATION ASSISTANCE TO STATES FOR THE EDUCATION OF CHILDREN WITH DISABILITIES Preschool Grants for Children with Disabilities § 300.807 Allocations to States. The Secretary allocates the amount...
14 CFR 93.321 - Transfer and termination of allocations.
Code of Federal Regulations, 2011 CFR
2011-01-01
...CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES SPECIAL AIR TRAFFIC RULES Special Flight Rules in the Vicinity of Grand Canyon National Park, AZ § 93.321 Transfer and termination of allocations. (a) Allocations are not a...
21 CFR 70.45 - Allocation of color additives.
Code of Federal Regulations, 2014 CFR
2014-04-01
... 2014-04-01 false Allocation of color additives. 70.45 Section 70.45...OF HEALTH AND HUMAN SERVICES GENERAL COLOR ADDITIVES Safety Evaluation § 70.45 Allocation of color additives. Whenever, in the...
21 CFR 70.45 - Allocation of color additives.
Code of Federal Regulations, 2013 CFR
2013-04-01
... 2013-04-01 false Allocation of color additives. 70.45 Section 70.45...OF HEALTH AND HUMAN SERVICES GENERAL COLOR ADDITIVES Safety Evaluation § 70.45 Allocation of color additives. Whenever, in the...
21 CFR 70.45 - Allocation of color additives.
Code of Federal Regulations, 2012 CFR
2012-04-01
... 2012-04-01 false Allocation of color additives. 70.45 Section 70.45...OF HEALTH AND HUMAN SERVICES GENERAL COLOR ADDITIVES Safety Evaluation § 70.45 Allocation of color additives. Whenever, in the...
21 CFR 70.45 - Allocation of color additives.
Code of Federal Regulations, 2011 CFR
2011-04-01
... 2011-04-01 false Allocation of color additives. 70.45 Section 70.45...OF HEALTH AND HUMAN SERVICES GENERAL COLOR ADDITIVES Safety Evaluation § 70.45 Allocation of color additives. Whenever, in the...
14 CFR 93.215 - Initial allocation of slots.
Code of Federal Regulations, 2012 CFR
2012-01-01
...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...
14 CFR 93.215 - Initial allocation of slots.
Code of Federal Regulations, 2013 CFR
2013-01-01
...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...
14 CFR 93.215 - Initial allocation of slots.
Code of Federal Regulations, 2014 CFR
2014-01-01
...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...
Quantifying the impact of customer allocations on supply chain performance
Sheth, Neel
2012-01-01
This project investigates the impact that customer allocations have on key cost and service indicators at Intel Corporation. Allocations provide a method to fill orders during constrained supply, when total demand for a ...
Sex allocation and population structure in apicomplexan (protozoa) parasites
West, Stuart
Sex allocation and population structure in apicomplexan (protozoa) parasites Stuart A. West* , Todd allocation theory across parasitic protozoa in the phylum Apicomplexa. This cosmopolitan phylum consists attention, the population structure of parasitic protozoa species, and in particular estimates of sel
26 CFR 26.2632-1 - Allocation of GST exemption.
Code of Federal Regulations, 2012 CFR
2012-04-01
...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...
26 CFR 26.2632-1 - Allocation of GST exemption.
Code of Federal Regulations, 2011 CFR
2011-04-01
...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...
26 CFR 26.2632-1 - Allocation of GST exemption.
Code of Federal Regulations, 2013 CFR
2013-04-01
...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...
26 CFR 26.2632-1 - Allocation of GST exemption.
Code of Federal Regulations, 2014 CFR
2014-04-01
...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...
Recipient allocation preferences and organizational choices: a fit perspective
Gogus, Celile Itir
2007-04-25
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...
24 CFR 570.709 - Allocation of loan guarantee assistance.
Code of Federal Regulations, 2010 CFR
2010-04-01
...2010-04-01 false Allocation of loan guarantee assistance. 570.709 Section 570...COMMUNITY DEVELOPMENT BLOCK GRANTS Loan Guarantees § 570.709 Allocation of loan guarantee assistance. Of the amount approved...
40 CFR 60.4153 - Recordation of Hg allowance allocations.
Code of Federal Regulations, 2011 CFR
2011-07-01
...2011-07-01 2011-07-01 false Recordation of Hg allowance allocations. 60.4153 Section...Coal-Fired Electric Steam Generating Units Hg Allowance Tracking System § 60.4153 Recordation of Hg allowance allocations. (a) By...
10 CFR 490.703 - Biodiesel fuel use credit allocation.
Code of Federal Regulations, 2010 CFR
2010-01-01
... 2010-01-01 2010-01-01 false Biodiesel fuel use credit allocation. 490.703... ALTERNATIVE FUEL TRANSPORTATION PROGRAM Biodiesel Fuel Use Credit § 490.703 Biodiesel fuel use credit allocation. (a)...
21 CFR 70.45 - Allocation of color additives.
Code of Federal Regulations, 2010 CFR
2010-04-01
... 2010-04-01 false Allocation of color additives. 70.45 Section 70.45...OF HEALTH AND HUMAN SERVICES GENERAL COLOR ADDITIVES Safety Evaluation § 70.45 Allocation of color additives. Whenever, in the...
1985 NAPAP EMISSIONS INVENTORY: DEVELOPMENT OF SPECIES ALLOCATION FACTORS
The report describes the methodologies and data bases used to develop species allocation factors and data processing software used to develop the 1985 National Acid Precipitation Assessment Program (NAPAP) Modelers' Emissions Inventory (Version 2). Species allocation factors were...
42 CFR 495.358 - Cost allocation plans.
Code of Federal Regulations, 2013 CFR
2013-10-01
...PROGRAM Requirements Specific to the Medicaid Program § 495.358 Cost allocation plans. State agencies that acquire HIT equipment and services under this subpart are subject to cost allocation plan requirements in 45 CFR part...
42 CFR 495.358 - Cost allocation plans.
Code of Federal Regulations, 2014 CFR
2014-10-01
...PROGRAM Requirements Specific to the Medicaid Program § 495.358 Cost allocation plans. State agencies that acquire HIT equipment and services under this subpart are subject to cost allocation plan requirements in 45 CFR part...
42 CFR 495.358 - Cost allocation plans.
Code of Federal Regulations, 2012 CFR
2012-10-01
...PROGRAM Requirements Specific to the Medicaid Program § 495.358 Cost allocation plans. State agencies that acquire HIT equipment and services under this subpart are subject to cost allocation plan requirements in 45 CFR part...
42 CFR 495.358 - Cost allocation plans.
Code of Federal Regulations, 2011 CFR
2011-10-01
...PROGRAM Requirements Specific to the Medicaid Program § 495.358 Cost allocation plans. State agencies that acquire HIT equipment and services under this subpart are subject to cost allocation plan requirements in 45 CFR part...
7 CFR 1493.4 - Criteria for country allocations.
Code of Federal Regulations, 2010 CFR
2010-01-01
...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...
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.
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.
Generalized Nash Bargaining Solution for bandwidth allocation
Corinne Touati; Eitan Altman; Jérôme Galtier
2006-01-01
For over a decade, the Nash Bargaining Solution (NBS) concept from cooperative game theory has been used in net- works to share resources fairly. Due to its many appealing properties, it has recently been used for assigning bandwidth in a general topology network between applications that have linear utility functions. In this paper, we use this concept for allocating the
Telecom dogmas and spectrum allocations Andrew Odlyzko
Minnesota, University of
the most prominent and most disruptive new technology, and there were long debates on what the role heavy involvement in technology choices, they all had an intense interest in pricing, and attemptedTelecom dogmas and spectrum allocations Andrew Odlyzko Digital Technology Center, University
Optimal Allocation Of Tasks In Hypercube Computers
NASA Technical Reports Server (NTRS)
Salama, Moktar A.; Price, Camille C.
1990-01-01
Uniform tasks distributed uniformly or else assigned to one processor. Investigation in theory of scheduling yielded optimal scheme for allocation of tasks among digital data processors in hypercube ensemble. Applies to tasks that require equal time to execute, performed in any order, and between any two of which equal amounts of communication required. Reduces overall processing time for given set of computational tasks.
Case Study: A Resource Allocator Stephan Merz
Merz, Stephan
TLA+ Case Study: A Resource Allocator Stephan Merz INRIA Lorraine & LORIA, Nancy, France Stephan.Merz@loria.fr August 17, 2004 Abstract This note presents a case study for the specification and analysis of reactive of the system to be specified is to manage a (finite) set of resources that are shared among a number of client
Allocating scarce resources for endangered species recovery
Benjamin M. Simon; Craig S. Leff; Harvey Doerksen
1995-01-01
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
Limits on linearity of missile allocation optimization
Canavan, G.H.
1997-12-01
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.
Gemini Observatory Time Allocation and Program Execution
NASA Astrophysics Data System (ADS)
Adamson, Andy; Rodgers, Bernadette; Joergensen, Inger
2013-01-01
Gemini Observatory caters to a diverse community of six partner nations (Argentina, Australia, Brazil, Canada, US and the UK) and two hosts (Chile and the University of Hawaii). This paper describes the current methods for time allocation, scheduling and execution of science programs for Gemini users.
Ground data systems resource allocation process
NASA Technical Reports Server (NTRS)
Berner, Carol A.; Durham, Ralph; Reilly, Norman B.
1989-01-01
The Ground Data Systems Resource Allocation Process at the Jet Propulsion Laboratory provides medium- and long-range planning for the use of Deep Space Network and Mission Control and Computing Center resources in support of NASA's deep space missions and Earth-based science. Resources consist of radio antenna complexes and associated data processing and control computer networks. A semi-automated system was developed that allows operations personnel to interactively generate, edit, and revise allocation plans spanning periods of up to ten years (as opposed to only two or three weeks under the manual system) based on the relative merit of mission events. It also enhances scientific data return. A software system known as the Resource Allocation and Planning Helper (RALPH) merges the conventional methods of operations research, rule-based knowledge engineering, and advanced data base structures. RALPH employs a generic, highly modular architecture capable of solving a wide variety of scheduling and resource sequencing problems. The rule-based RALPH system has saved significant labor in resource allocation. Its successful use affirms the importance of establishing and applying event priorities based on scientific merit, and the benefit of continuity in planning provided by knowledge-based engineering. The RALPH system exhibits a strong potential for minimizing development cycles of resource and payload planning systems throughout NASA and the private sector.
Energy cost allocation method and system
Klima, D.P.; Pakel, J.E.
1986-05-27
A system is described for allocating heating energy costs among units served by a common heat generating installation. Each unit includes a heat inlet line and a heat return line coupled to the heat generating installation. The heat return line has a valve therin responsive to given control signals for opening and closing, and a thermostat in each unit for producing the control signals for opening and closing the return line; the allocating system comprising: temperature responsive means located on the heat return line for providing a temperature signal which is a predetermined function of the temperature at the return line; and microcomputer means responsive to the temperature signal and to the control signal from the thermostat for recording the time during which the temperature signal corresponds to a temperature at or above a predetermined temperature and the thermostat signal simultaneously corresponds to the open condition of the valve; and allocating means responsive to the recorded time data for each of the units for allocating heating energy costs among the units.
School Districts' Allocation of Chapter 1 Resources.
ERIC Educational Resources Information Center
Goertz, Margaret E.; And Others
Chapter 1 of the Education Consolidation and Improvement Act provides local school districts with federal funds to meet the special needs of educationally deprived children in high poverty areas. Because federal regulations provide little guidance for allocating Chapter 1 resources within the districts, distribution formulas vary and so do the…
Resource Allocation Patterns and Student Achievement
ERIC Educational Resources Information Center
James, Lori; Pate, James; Leech, Donald; Martin, Ellice; Brockmeier, Lantry; Dees, Elizabeth
2011-01-01
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…
Rumination and Impaired Resource Allocation in Depression
Levens, Sara M.; Muhtadie, Luma; Gotlib, Ian H.
2010-01-01
Depression is characterized by a range of cognitive deficits that theorists posit are due to the resource capturing properties of rumination. The present study was designed to examine the relation between rumination and resource allocation in depression. Twenty-five depressed and 25 nondepressed participants completed a modified dual-task version of the recency-probes task, which assesses the controlled allocation of cognitive resources by comparing performance across low- and high-interference conditions. In low-interference conditions, participants performed either the recency-probes task or a tracking task, which required participants to track specific stimuli across trials (i.e., no dual-task interference). In the high-interference condition, participants performed both the recency-probes task and the tracking task, which required the controlled allocation of resources to resolve dual-task interference. Depressed participants performed significantly worse than did their nondepressed counterparts in only the high-interference condition; performance of the 2 groups was comparable in the low-interference conditions. Furthermore, the degree to which depressed participants were impaired in the high-interference condition was correlated .74 with rumination. These findings suggest that an association between rumination and impairments in resource allocation underlies the cognitive difficulties experienced by depressed individuals. PMID:19899845
Issues in organ procurement, allocation, and transplantation.
Nierste, Deborah
2013-01-01
Organ transplantation extends lives and improves health but presents complex ethical dilemmas for nurses caring for donors, recipients, and their families. This article overviews organ procurement and allocation, discusses ethical dilemmas in transplantation, and offers strategies from professional and biblical perspectives for coping with moral distress and maintaining compassionate care. PMID:23607154
Incentive compatible resource allocation in concurrent design
Seth D. Guikema
2006-01-01
This article presents an approach that a manager can use to allocate resources needed to design a system among the members of a concurrent design team. The system being designed is assumed to be composed of a number of subsystems, each designed by a different engineer. These engineers possess private information about the performance of their subsystem as a function
Heuristic approach for automated shelf space allocation
Dario Landa Silva; Fathima Marikar; Khoi Le
2009-01-01
Shelf space allocation is the problem of efficiently arranging retail products on shelves in order to maximise profit, improve stock control, improve customer satisfaction, etc. Most work reported in the literature on this problem has focused on the case of large retailers such as big supermarkets. The interest here is to tackle this problem in the context of small retail
Multi-resource Allocation with Unknown Participants
Devismes, Stéphane
Multi-resource Allocation with Unknown Participants Ajoy K. Datta, Lawrence L. Larmore School networks) has been active for more than three decades. Variants of the problem include mutual exclusion, group mutual exclusion, k-exclusion, k-out-of-m ex- clusion, local mutual exclusion, dining philosophers
Register Allocation & Spilling via Graph Coloring
Gregory J. Chaitin
1982-01-01
In a previous paper we reported the successful use of graph coloring techniques for doing global register allocation in an experimental PL\\/I optimizing compi- ler. When the compiler cannot color the register con- fliet graph with a number of colors equal to the num- ber of available machine registers, it must add code to spill and reload registers to and
1 December 1998 COMPLEXITY OF ALLOCATION PROCESSES
Meyer, David A.
pie and is faced with the quintessential problem (no more American than are mothers or pies!) of allocating the pie among her children: Alice, Bob and Charlie. For reasons of her own she cuts a 1 3 wedge of the pie and suggests to her children that she give it to Charlie and leave the remaining 2 3 of the pie
COMPUTER FEE ALLOCATION COMMITTEE PROPOSAL MONTANA STATE
Maxwell, Bruce D.
COMPUTER FEE ALLOCATION COMMITTEE PROPOSAL MONTANA STATE UNIVERSITY CFAC Proposal for FY16 Funds that a portion of CFAC funds are set aside on an on-going basis to maintain existing campus-wide computing/Departmental Proposal: Supports the maintenance and enhancement of existing departmental computing labs, infrastructure
Discrete Resource Allocation in Visual Working Memory
ERIC Educational Resources Information Center
Barton, Brian; Ester, Edward F.; Awh, Edward
2009-01-01
Are resources in visual working memory allocated in a continuous or a discrete fashion? On one hand, flexible resource models suggest that capacity is determined by a central resource pool that can be flexibly divided such that items of greater complexity receive a larger share of resources. On the other hand, if capacity in working memory is…
Code of Federal Regulations, 2010 CFR
2010-01-01
...4), 306(d)(3)(B) and 306(d)(10) of the Act foster intergovernmental cooperation in that a state, in accordance...governments, interstate, regional and areawide agencies. (b) A State may allocate a portion or portions of its grant to...
Code of Federal Regulations, 2011 CFR
2011-01-01
...4), 306(d)(3)(B) and 306(d)(10) of the Act foster intergovernmental cooperation in that a state, in accordance...governments, interstate, regional and areawide agencies. (b) A State may allocate a portion or portions of its grant to...
RESOURCES ALLOCATION TO OPTIMIZE MINING POLLUTION CONTROL
A comprehensive model for mine drainage simulation and optimization of resource allocation to control mine acid pollution in a watershed has been developed. The model is capable of: (a) Producing a time trace of acid load and flow from acid drainage sources as a function of clima...
Allocating Roles in Extreme Teams Paul Scerri
Scerri, Paul
a common pool, i.e., the pool of roles to be assigned. The mechanism for allocating values to variables given dynamic tasks, and where many resource limited agents have similar functionality, but possibly resource limits; (iii) many agents can fulfill the same role; (iv) inter-role constraints may be present
Actual 1989-90 Cost Allocation Summary.
ERIC Educational Resources Information Center
Wisconsin State Board of Vocational, Technical, and Adult Education, Madison.
Drawing from data submitted by the Wisconsin Vocational, Technical and Adult Education (VTAE) districts on their 1989-90 actual cost allocation schedules, this report provides information on district and statewide program and unit costs. First, introductory material provides a statewide summary by aid category of the actual unit costs and ratios…
Actual 1995-96 Cost Allocation Summary.
ERIC Educational Resources Information Center
Wisconsin State Board of Vocational, Technical, and Adult Education, Madison.
Drawn from college data submitted on 1995-96 actual cost allocation schedules, this report provides information on district and statewide program costs for the Wisconsin Technical College System. A brief introduction reviews actual unit costs and ratios for headcount enrollments and Full-Time-Equivalent (FTE) students, indicating that the total…
Actual 1996-97 Cost Allocation Summary.
ERIC Educational Resources Information Center
Wisconsin Technical Coll. System Board, Madison.
Drawn from college data submitted on 1996-97 actual cost allocation schedules, this report provides information on district and statewide program costs for the Wisconsin Technical College System. A brief introduction reviews actual unit costs and ratios for headcount enrollments and Full-Time Equivalent (FTE) students, indicating that the total…
Actual 1993-94 Cost Allocation Summary.
ERIC Educational Resources Information Center
Wisconsin State Board of Vocational, Technical, and Adult Education, Madison.
Drawing from data submitted by the Wisconsin Vocational, Technical, and Adult Education (VTAE) districts on their 1993-94 actual cost allocation schedules, this report provides information on district and statewide program and unit costs. First, introductory material provides a statewide summary by aid category of the actual unit costs and ratios…
Actual 1997-98 Cost Allocation Summary.
ERIC Educational Resources Information Center
Wisconsin Technical Coll. System Board, Madison.
Drawn from college data submitted in the 1997-1998 actual cost allocation schedules, this report provides preliminary information on district and statewide program costs for the Wisconsin Technical College System. A brief introduction reviews actual unit costs and ratios for headcount enrollments and Full-Time Equivalent (FTE) students, indicating…
Cost Allocation Summary, 1984-85 (Actual).
ERIC Educational Resources Information Center
Wisconsin State Board of Vocational, Technical, and Adult Education, Madison.
Drawing from data submitted by the Wisconsin Vocational, Technical, and Adult Education (VTAE) districts on their 1984-85 actual cost allocation schedules, this report provides information on district and statewide program and unit costs. First, introductory material provides a statewide summary by aid category of the actual unit costs and ratios…
Actual 1994-95 Cost Allocation Summary.
ERIC Educational Resources Information Center
Wisconsin Technical Coll. System Board, Madison.
Drawn from college data submitted on 1994-95 actual cost allocation schedules, this report provides information on district and statewide program costs for the Wisconsin Technical College System. A brief introduction reviews actual unit costs and ratios for headcount enrollments and full-time equivalent (FTE) students, indicating that the total…
Simple Generational Garbage Collection and Fast Allocation
Andrew W. Appel
1989-01-01
Generational garbage collection algorithms achieve efficiency because newer records point to older records; the only way an older record can point to a newer record is by a store operation to a previously-created record, and such operations are rare in many languages. A garbage collector that concentrates just on recently allocated records can take advantage of this fact.
Parallel Copying Garbage Collection using Delayed Allocation
Petrank, Erez
Parallel Copying Garbage Collection using Delayed Allocation Erez Petrank #3; Elliot K. Kolodner y Abstract We present a new approach to parallel copying garbage collection on symmetric multiprocessor (SMP and implementation, Parallel garbage collec- tion, Memory management. 1 Introduction Java is an important new
Determinants of Time Allocation across the Lifespan
Gurven, Michael
. We apply the model to traditional human subsistence patterns. The model predicts that young children of time to alternative activities is a topic that has interested schol- ars in many different disciplines reduces time available for other activities. Thus the total effects of time allocation decisions not only
Efficient Resource and Energy Allocation for
Shihada, Basem
for green networking: 1. Investigate how easy being networking green? 2. Develop a sustainable green networking. 5. Obtain new and expanding business areas for green networking. #12;Resource & EnergyEfficient Resource and Energy Allocation for Networking Systems Basem Shihada CEMSE, KAUST
Possible and Necessary Allocations via Sequential Mechanisms
Walsh, Toby
a family of such policies. For example, at the Har- vard Business School, a policy is chosen at random from balanced, balanced alternating, strictly alternating and all policies. We identify characterizations of allocations produced balanced, recursively balanced, balanced alternating policies and strictly alternating
Optimal Power Allocation for Relay Assisted F/TDMA Ad Hoc Networks
Yener, Aylin
for the other. Relay assisted transmission is expected to improve the per- formance of multiuser systems as well node would serve multiple users, and the total transmission power budget for each relay node would be limited. When this is the case, each user's transmission should be relayed with a fraction of the power
An Economic Framework for Resource Allocation in Ad-hoc Grids
Universiteit Delft, copromotor Prof. dr. Magnus Boman KTH Royal Institute of Technology Dr. Luc Onana Alima and investigate the effect of introducing money and budget constraints. Furthermore, we analyze differ- ent
Three New Complexity Results for Task Allocation Problems
de Keijzer, Bart
2008-01-01
We prove the following results for task allocation of indivisible resources: - The problem of finding a leximin-maximal resource allocation is in P if the agents have max-utility functions and atomic demands. - Deciding whether a resource allocation is Pareto-optimal is coNP-complete for agents with (1-)additive utility functions. - Deciding whether there exists a Pareto-optimal and envy-free resource allocation is Sigma_2^p-complete for agents with (1-)additive utility functions.
The allocation of ecosystem net primary productivity in tropical forests
Malhi, Yadvinder; Doughty, Christopher; Galbraith, David
2011-01-01
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 ‘root–shoot’ 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
Male rock sparrows differentially allocate nest defence but not food provisioning to offspring
Pilastro, Andrea
Male rock sparrows differentially allocate nest defence but not food provisioning to offspring differential allocation based on a female ornament in the rock sparrow (Petronia petronia), a monomorphic of male differential allocation in rock sparrows. Keywords: differential allocation hypothesis, parental
25 CFR 170.200 - How does BIA allocate IRR Program funds?
Code of Federal Regulations, 2010 CFR
2010-04-01
...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...
Nucleon structure from stochastic estimators
Gunnar S. Bali; Sara Collins; Benjamin Gläßle; Meinulf Göckeler; Johannes Najjar; Rudolf Rödl; Andreas Schäfer; André Sternbeck; Wolfgang Söldner
2013-11-20
Using stochastic estimators for connected meson and baryon three-point functions has successfully been tried in the past years. Compared to the standard sequential source method we trade the freedom to compute the current-to-sink propagator independently of the hadron sink for additional stochastic noise in our observables. In the case of the nucleon we can use this freedom to compute many different sink-momentum/polarization combinations, which grants access to more virtualities. We will present preliminary results on the scalar, electro-magnetic and axial form factors of the nucleon in $N_f=2+1$ lattice QCD and contrast the performance of the stochastic method to the sequential source method. We find the stochastic method to be competitive in terms of errors at fixed cost.
A singular stochastic integral equation
Nualart, David; Sanz, Marta
1982-03-05
This note is devoted to the discussion of the stochastic differential equation $ XdX + YdY = 0$, $ X$ and $ Y$ being continuous local martingales. A method to construct solutions of this equation is given....
Stochastic thermodynamics: Principles and perspectives
Udo Seifert
2007-10-05
Stochastic thermodynamics provides a framework for describing small systems like colloids or biomolecules driven out of equilibrium but still in contact with a heat bath. Both, a first-law like energy balance involving exchanged heat and entropy production entering refinements of the second law can consistently be defined along single stochastic trajectories. Various exact relations involving the distribution of such quantities like integral and detailed fluctuation theorems for total entropy production and the Jarzynski relation follow from such an approach based on Langevin dynamics. Analogues of these relations can be proven for any system obeying a stochastic master equation like, in particular, (bio)chemically driven enzyms or whole reaction networks. The perspective of investigating such relations for stochastic field equations like the Kardar-Parisi-Zhang equation is sketched as well.
Stochastic dynamics of baroclinic waves
NASA Technical Reports Server (NTRS)
Farrell, Brian F.; Ionannou, Petros J.
1993-01-01
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.
Stochastic Considerations in Systems Resilience
Stochastic Considerations in Systems Resilience Engineering Jose Emmanuel Ramirez-Marquez Associate for Secure and Resilient Maritime Commerce: Maritime Infrastructure Recovery - recommends procedures, November 22, 11 #12;Key Research Questions What is Network Resilience? (Many Definitions) -The word
Analysis of Dynamic Task Allocation in Multi-Robot Systems
Southern California, University of
Analysis of Dynamic Task Allocation in Multi-Robot Systems Kristina Lerman1 , Chris Jones2 , Aram|maja}@robotics.usc.edu Abstract Dynamic task allocation is an essential requirement for multi-robot systems operating in unknown for task allocation that use only local sensing and no direct communication between robots are attractive
Methods for task allocation via agent coalition formation ?
Kraus, Sarit
Methods for task allocation via agent coalition formation ? Onn Shehory The Robotics Institute. Task allocation to groups of agents is necessary when tasks cannot be performed by a single agent' performance. In this paper we present several solutions to the problem of task allocation among autonomous
Optimized Rate Allocation for State Feedback Control over Noisy Channels
Johansson, Karl Henrik
control. How to achieve the optimal rate allocation in control systems is a challenging task. One mainOptimized Rate Allocation for State Feedback Control over Noisy Channels Lei Bao, Mikael Skoglund, Stockholm, Sweden {lei.bao, skoglund, carlofi, kallej}@ee.kth.se Abstract-- Optimal rate allocation
Analysis of Dynamic Task Allocation in Multi-Robot Systems
Galstyan, Aram
Analysis of Dynamic Task Allocation in Multi-Robot Systems Kristina Lerman1 , Chris Jones2 , Aram|maja}@robotics.usc.edu Abstract Dynamic task allocation is an essential requirement for multi-robot systems functioning in unknown for task allocation that use only local sensing and no direct communication between robots are attractive
Modeling Task Allocation with Time using Auction A thesis presented
Chen, Yiling
Modeling Task Allocation with Time using Auction Mechanisms A thesis presented by Swara S. Kopparty Harvard College Cambridge, Massachusetts March 30, 2012 #12;Abstract The ecient allocation of tasks of the complementarity of subtasks. 1 #12;Contents 1 Introduction 5 2 Related Work 8 3 Allocation of a Single Task
Auction Equilibrium Strategies for Task Allocation in Uncertain Environments
Kraus, Sarit
Auction Equilibrium Strategies for Task Allocation in Uncertain Environments David Sarne1 , Meirav sample environments. 1 Introduction Distributed task allocation to self-interested agents is an important, will try to enforce cooperation throughout task allocation proto- cols. Nevertheless, while both
On Cluster Resource Allocation for Multiple Parallel Task Graphs
Casanova, Henri
On Cluster Resource Allocation for Multiple Parallel Task Graphs Henri Casanovaa , Fr by an approximation algorithm. Key words: Multi-criteria Scheduling, Resource Allocation, Parallel Task Graphs to a task is called the task's allocation. The task execution time is typically non
Dynamic Task Allocation in Asynchronous Shared Memory Dan Alistarh
Aspnes, James
Dynamic Task Allocation in Asynchronous Shared Memory Dan Alistarh MIT James Aspnes Yale Michael A. Bender Stony Brook University & Tokutek Rati Gelashvili§ MIT Seth Gilbert¶ NUS Abstract Task allocation for dynamic task allocation, and we prove that our solution is optimal within logarithmic factors. The main
ALLOCATION, LEHRER MODELS, AND THE CONSENSUS OF PROBABILIq?IES
Wagner, Carl
CARLWAGNER ALLOCATION, LEHRER MODELS, AND THE CONSENSUS OF PROBABILIq?IES 1. ALLOCATION PROBLEMS, the determination of such values is a difficult task. Typically, individuals are required to make subjective opinion for a special class of decision problems called allocation problems. Our main result (Theorem 4
DGF: Decentralized Group Formation for Task Allocation in Complex
Zhang, Minjie
DGF: Decentralized Group Formation for Task Allocation in Complex Adaptive Systems Dayong Ye for task allocation in complex adaptive systems is proposed. Compared with cur- rent related works for discovering effective system structures for task allocation. Moreover, a set of experiments was conducted
A Distributed Architecture For Heterogeneous Multi Sensor-Task Allocation
Preece, Alun
A Distributed Architecture For Heterogeneous Multi Sensor-Task Allocation Diego Pizzocaro, Alun system to automatically allocate sensors to tasks. We formalize this problem as Multi- Sensor Task Allocation (MSTA) and show that the heterogeneity of sensors and tasks requires knowledge-based sensor-task
Formal Analysis of Negotiation Protocols for Task Allocation
Massachusetts at Amherst, University of
Chapter 6 Formal Analysis of Negotiation Protocols for Task Allocation Victor Lesser1 , Jiaying constructed a unified framework to model and analyze the task allocation problem in agent societies over time. In such systems, effective task allocation is an important problem since it is not always
Hierarchical Distributed Task Allocation for Multi-Robot Exploration
Butler, Zack
Hierarchical Distributed Task Allocation for Multi-Robot Exploration John Hawley and Zack Butler cooperatively. When properly done, the group allocates specific portions of the overall exploration task multiple robots is through the use of market-based schemes for task allocation [5, 6, 13, 16]. When a new
Optimizing Manpower Allocation for Ground Handling Tasks in Airports using
Optimizing Manpower Allocation for Ground Handling Tasks in Airports using Column Generation Anders the composition of staff may vary for different tasks. Another example is in the allocation of technicians@imm.dtu.dk Abstract The Manpower Allocation Problem with Time Windows, Job-Teaming Constraints and a limited number
Augmented Metacognition Addressing Dynamic Allocation of Tasks Requiring Visual Attention
Bosse, Tibor
Augmented Metacognition Addressing Dynamic Allocation of Tasks Requiring Visual Attention Tibor metacognition on task allocation for tasks requiring visual attention. In the domain of naval warfare. However, a problem is how to determine an appropriate allocation of tasks. Due to the rapidly changing