Academic literature on the topic 'Resource Dependence Model'
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Journal articles on the topic "Resource Dependence Model"
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Casciaro, Tiziana, and Mikolaj Jan Piskorski. "Power Imbalance, Mutual Dependence, and Constraint Absorption: A Closer Look at Resource Dependence Theory." Administrative Science Quarterly 50, no. 2 (June 2005): 167–99. http://dx.doi.org/10.2189/asqu.2005.50.2.167.
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Despite ubiquitous references to Pfeffer and Salancik's classic volume, The External Control of Organizations, resource dependence theory is more of an appealing metaphor than a foundation for testable empirical research. We argue that several ambiguities in the resource dependence model account in part for this and propose a reformulation of resource dependence theory that addresses these ambiguities, yields novel predictions and findings, and reconciles them with seemingly contradictory empirical evidence from past studies. We identify two distinct theoretical dimensions of resource dependence, power imbalance and mutual dependence, which in the original theory were combined in the construct of interdependence and yet have opposite effects on an organization's ability to reduce dependencies by absorbing sources of external constraint. Results from a study of interindustry mergers and acquisitions among U.S. public companies in the period 1985–2000 indicate that, while mutual dependence is a key driver of mergers and acquisitions, power imbalance acts as an obstacle to their formation. We conclude that our reformulation of the resource dependence model contributes to realizing the potential of resource dependency as a powerful explanation of interorganizational action.
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Johnson, Diane Elizabeth. "Transactions in Symbolic Resources: A Resource Dependence Model of Congressional Deliberation." Sociological Perspectives 38, no. 2 (June 1995): 151–73. http://dx.doi.org/10.2307/1389288.
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A modification of Stephen Toulmin's (1984) “field-specific reasoning” is applied to the text of deliberations in the United States Congress surrounding the foreign corrupt practices case 1975–1977. Findings suggest that Congress has developed an institutionalized mode of deliberation focused on developing argumentation capable of bringing limited sets of highly general and cathected goals (warrants) into equilibrium. The coalition-building capacity of symbolic resources is traced to their “embeddedness” in overlapping networks of issues, existing legislation, governmental organs, congressional committees, legislative careers, and mobilized (or mobilizable) constituencies. The analysis is used to formulate a resource dependence model of exchange in symbolic resources.
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Roundy, Philip T., and Mark A. Bayer. "To bridge or buffer? A resource dependence theory of nascent entrepreneurial ecosystems." Journal of Entrepreneurship in Emerging Economies 11, no. 4 (November 4, 2019): 550–75. http://dx.doi.org/10.1108/jeee-06-2018-0064.
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Purpose Vibrant entrepreneurial ecosystems, systems of inter-related forces that promote and sustain regional entrepreneurship, are increasingly viewed as sources of innovation, economic development and community revitalization. Regions with emerging, underdeveloped or depressed economies are attempting to develop their nascent entrepreneurial ecosystems in the hopes of experiencing the positive benefits of entrepreneurial activity. For nascent entrepreneurial ecosystems to grow requires resources. However, how nascent entrepreneurial ecosystems manage their resource dependencies and the tensions that exist between creating and attracting resources are not clear. The purpose of this paper is to propose a theory of nascent entrepreneurial ecosystem resource dependence. Design/methodology/approach This conceptual paper analyzes entrepreneurial ecosystems as meta-organizations and builds on resource dependence theory to explain how nascent ecosystems respond to environmental dependencies and their resource needs through internal and external strategies. Findings Two specific strategies used by nascent entrepreneurial ecosystems to manage resource dependence – bridging and buffer – are explored. It is proposed that there is a positive relationship between the resource dependence of a nascent entrepreneurial ecosystem and its use of bridging and buffering activities. Two ecosystem characteristics that influence the pursuit of bridging and buffering – ecosystem size and the presence of collaborative values – are also identified. In addition, it is theorized that resource dependence strategies influence a key, system-level characteristic of entrepreneurial ecosystems: resilience, the ecosystem’s ability to respond and adapt to internal and external disruptions. Originality/value The theory presented generates insights into how nascent entrepreneurial ecosystems create and obtain resources when ecosystems are unmunificent, resource-constrained or underdeveloped. The theorizing addresses which resource dependence strategy – buffering or bridging – has a stronger link to resource dependence (and resilience) and under what conditions these linkages occur. The theoretical model generates insights for research on entrepreneurship in emerging and developed economies and produces practical implications for ecosystem participants, policymakers and economic development organizations.
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Weiner, Nan. "Executive Succession. An Examination of the Resource Dependence Model." Canadian Journal of Administrative Sciences / Revue Canadienne des Sciences de l'Administration 1, no. 2 (April 8, 2009): 321–37. http://dx.doi.org/10.1111/j.1936-4490.1984.tb00294.x.
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Åkerborg, Örjan, Andrea Lang, Anders Wimo, Anders Sköldunger, Laura Fratiglioni, Maren Gaudig, and Mats Rosenlund. "Cost of Dementia and Its Correlation With Dependence." Journal of Aging and Health 28, no. 8 (July 9, 2016): 1448–64. http://dx.doi.org/10.1177/0898264315624899.
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Objective: To estimate the cost of dementia care and its relation to dependence. Method: Disease severity and health care resource utilization was retrieved from the Swedish National Study on Aging and Care. Informal care was assessed with the Resource Utilization in Dementia instrument. A path model investigates the relationship between annual cost of care and dependence, cognitive ability, functioning, neuropsychiatric symptoms, and comorbidities. Results: Average annual cost among patients diagnosed with dementia was €43,259, primarily incurred by accommodation. Resource use, that is, institutional care, community care, and accommodation, and corresponding costs increased significantly by increasing dependency. Path analysis showed that cognitive ability, functioning, and neuropsychiatric symptoms were significantly correlated with dependence, which in turn had a strong impact on annual cost. Discussion: This study confirms that cost of dementia care increases with dependence and that the impact of other disease indicators is mainly mediated by dependence.
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OSIPOVA, M. Yu, and E. V. KOZHEMYAKINA. "RESOURCE DEPENDENCE AS A KEY DETERRENT TO REGIONAL DEVELOPMENT." EKONOMIKA I UPRAVLENIE: PROBLEMY, RESHENIYA 2, no. 12 (2020): 108–13. http://dx.doi.org/10.36871/ek.up.p.r.2020.12.02.016.
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The paper examines the dependence of the regions of the Russian Federation on the extractive industry. A methodological toolkit is proposed, namely, an econometric model, which made it possible to identify the dominant industry in the regional economy, to form clusters by highlighting the dominant industries. Regression models of each cluster were built to determine the influence of the prevailing industry on the main socio-economic indicators.
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Clootens, Nicolas, and Djamel Kirat. "Threshold regressions for the resource curse." Environment and Development Economics 25, no. 6 (August 10, 2020): 583–610. http://dx.doi.org/10.1017/s1355770x20000297.
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AbstractThis paper analyzes the behavior of cross-country growth rates with respect to resource abundance and dependence. We reject the linear model that is commonly used in growth regressions in favor of a multiple-regime alternative. Using a formal sample-splitting method, we find that countries exhibit different behaviors with respect to natural resources depending on their initial level of development. In high-income countries, natural resources play only a minor role in explaining the differences in national growth rates. On the contrary, in low-income countries, abundance seems to be a blessing but dependence restricts growth.
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Moroz, Deniz, Nadzeya Hruntovich, Aliaksei Kapanski, Yauhen Shenets, Mikhail Malashanka, and Elena Gracheva. "Using models of energy consumption from influencing factors to assess the current state and energy efficiency forecasting." E3S Web of Conferences 220 (2020): 01024. http://dx.doi.org/10.1051/e3sconf/202022001024.
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A complex of tasks that can be solved using mathematical models of the dependence of consumed energy resources on influencing factors are considered in the article. The main type of model for industrial consumers with a simple relationship between energy and technology, is the one-factor model “consumed energy resource-volume of output”. For industrial consumers with a complex relationship between energy and technology, the mathematical model of the dependence of energy resources on technology is determined by several factors. Methods for assessing the current state of energy efficiency, as well as predicting it for the future in the context of the introduction of energy saving measures and changes in the production program were proposed.
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van Elk, Jan F., Ritu Gupta, and David Wann. "Probabilistic Aggregation of Oil and Gas Field Resource Estimates and Project Portfolio Analysis." SPE Reservoir Evaluation & Engineering 13, no. 01 (December 22, 2009): 72–81. http://dx.doi.org/10.2118/116395-pa.
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Summary Probabilistic aggregation and dependency estimation are essential in portfolio methods, production forecasting, and resource estimation. The use of arithmetic addition understates the true value of the resource estimates within a portfolio of fields. Potentially, this could result in deferral of a project, or loss of lucrative business and commercial opportunities, such as project investment, facilitysizing decisions, or incremental gas-supply commitments. A statistically robust method for aggregation of resource estimates that appropriately uses expert opinion is presented in this paper. Using two integrated-project examples, this paper introduces new methods for (1) probabilistic aggregation of the resource estimates for multiple fields and (2) estimating a measure of dependency between the resource estimates of individual fields. The new analytical method for probabilistic aggregation is based on multivariate skew-normal (MSN) distributions, which can model a wide range of skewness through a shape parameter and are used heavily in financial and actuarial applications. In studies of the fields in which the multiple-realizations approach is used as a basis for the uncertainty framework, tornado diagrams are generated routinely to describe the dependence of the field resources on reservoir parameters. The improved method for evaluating measures of dependency between the resource estimates within a portfolio of fields uses these tornado diagrams as a basis. Incorporating the expertise and knowledge of geologists and petroleum engineers is a critical element of the method. These methods for probabilistic aggregation and estimating dependencies were developed within the context of the oil industry, but their use is not limited to the oil industry. They are general and can be used in other probabilistic-aggregation problems. Application of these techniques requires limited time and effort, compared to individual-field studies, and can have a profound impact on the uncertainty range of the total resources for the portfolio of fields.
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AbouAssi, Khaldoun, and Mary Tschirhart. "Testing the Strategic Response Model to Show Joint Effect of Resource Dependency and Centrality in Donor Network on NGO Response to Donor Demand." Journal of Public and Nonprofit Affairs 8, no. 1 (March 8, 2022): 58–77. http://dx.doi.org/10.20899/jpna.8.1.58-77.
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The Strategic Response Model (SRM) integrates two constructs, an organization’s resource dependence and network centrality, to predict response to an external demand. This article puts the SRM to test to demonstrate its applicability as a management tool to help with decision-making. Using forty-nine Lebanese nongovernmental environmental organizations’ (NGOs’) responses to bilateral donors who changed funding interests, the results are consistent with the model’s prediction of three types of responses, exit, voice, and adjustment, regardless of which of three resource dependency variables are used. To add context to this test of the SRM model, the dynamics within a larger system of resource pursuit and allocation across sectors, especially for non-Western settings characterized by turbulence and uncertainty, are discussed. Donors and nonprofits need to consider short- and long-term strategic decisions, knowing that relationships created and fostered may be as important as resources provided and consumed.
Dissertations / Theses on the topic "Resource Dependence Model"
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Pai, Chih-Wen. "Determinants of the New Entry of HMOs into A Medicare Risk Contract: A Resource Dependence-Diversification Model." VCU Scholars Compass, 1996. https://scholarscompass.vcu.edu/etd/4946.
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The purpose of this study is to examine the determinants of the new entry of an HMO into a Medicare risk contract using a resource dependence—diversification model. This study is conducted through a non-experimental, panel design With one year time lag. An HMO’s market is defined as the service area. The primary sample for this study is composed of 440 HMOS that do not have a Medicare risk contract as of January 1994.
Data for the variables are extracted from the 1994 and 1995 InterStudy and Group Health Association of America (GHAA) directories, the 1996 Area Resource File, the 1994 County and City Data Book, the 1993 County Business Patterns. Additional supplementary data on adjusted average per capita cost (AAPCC) and county-level Medicare beneficiaries are obtained from the Health Care Financing Administration.
The dependent variable is discrete indicating an HMO’s market entry. Independent variables are grouped into four categories: market structure, resource munificence, market price, and organizational attributes. Twelve hypotheses are tested using multivariate logistic regression.
This analysis reveals that HMO enrollment size is a predominant, positive factor in predicting a new market entry. HMOs are also sensitive to the level of AAPCC rates in making a market entry decision. Results from hypothesis testing suggest that competition encourages a new market entry. The importance of resource munificence is not statistically supported.
This study demonstrates the appropriateness of a panel design to verify a cause-effect relationship and the applicability of the service area as an HMO’s market. This study also contributes to the theoretical understanding of an HMO’s market entry.
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Driskill, John Owen. "Cultural Influences of Resource Dependence: Community College Administrator Perceptions of Implementing Initiatives Related to Tennessee’s Performance Funding Model." Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/etd/3093.
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The purpose of this phenomenological research study was to describe the cultural influences of resource dependence for community college administrators responsible for the implementation of initiatives related to Tennessee’s new performance funding program. Tennessee’s funding formula, considered one of the most aggressive and robust in the country, is among a second generation of performance funding programs commonly referred to as performance funding 2.0. Cultural influences of resource dependence were defined as values, beliefs, and customs that influence administrator efforts to improve institutional outcomes and acquire additional resources through performance funding.
A top performing community college in terms of the performance funding formula was selected because resource dependence theory suggests that a college succeeding under performance funding would be one that is adapting to improve outcomes and acquire state appropriations. Data were gathered from interviews with 10 administrators responsible for the implementation of initiatives related to Tennessee’s new performance funding program. Data were also gathered from 3 observations and 144 documents.
Findings indicated 4 themes: (1) Students Come First (values), (2) Pathway Mentality: Benefits and Conflict (beliefs), (3) The College Way: Be First, Be the Best (customs), and (4) Building on Foundation, Maintaining Momentum (changes). Overall, cultural influences of resource dependence for administrators responsible for implementing initiatives related to performance funding appear to be limited. Data suggest administrators are influenced by multiple cultural influences such as personal values, sense of community, faith in leadership, belief in the purpose of community colleges, and personal and institutional pride.
Although data indicate resource dependence has some influence, data also indicate that the power of performance funding’s influence appears connected to the vision and narrative it embodies. The study is significant because it contributes to the body of knowledge related to performance funding 2.0 programs. The study also provides rich understanding of cultural influences of performance funding and addresses the relationship between culture, organizational behavior, and organizational change.
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Venard, Asongayi. "The Impact of World Bank’s Conditionality-Ownership Hybrid on Forest Management in Cameroon: Policy Hybridity in International Dependence Development." Digital Commons @ East Tennessee State University, 2014. https://dc.etsu.edu/etd/2349.
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Many developing countries depend on the World Bank for development assistance, which the Bank often provides with policy reform conditions. Resistance to World Bank’s conditionality caused the Bank to posit “ownership” as a country’s real assent to its development policies. The combination of ownership and conditionality invalidates the neocolonial, false-paradigm and dualism theses in explaining the international dependence development model. This study explains this model by investigating how the relationship between conditionality and ownership in the context of this model impacts forest management in Cameroon.
Integrating theoretical and methodological insights mainly from political science, economics, geosciences, and sociology, the study finds that in this model, conditionality and ownership have a hybrid relationship that fosters and hinders effective forest management in Cameroon. This finding positions policy hybridity within this model. It proposes a nouvelle way to understand international development policies’ interactions, and the effects of the interactions on natural resource management.
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Chen, I.-Fan. "Resource-dependent acoustic and language modeling for spoken keyword search." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54919.
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In this dissertation, three research directions were explored to alleviate two major issues, i.e., the use of incorrect models and training/test condition mismatches, in the modeling frameworks of modern spoken keyword search (KWS) systems. Each of the three research directions, which include (i) data-efficient training processes, (ii) system optimization objectives, and (iii) data augmentation, utilizes different types and amounts of training resources in different ways to ameliorate the two issues of acoustic and language modeling in modern KWS systems. To be more specific, resource-dependent keyword modeling, keyword-boosted sMBR (state-level minimum Bayes risk) training, and multilingual acoustic modeling are proposed and investigated for acoustic modeling in this research. For language modeling, keyword-aware language modeling, discriminative keyword-aware language modeling, and web text augmented language modeling are presented and discussed. The dissertation provides a comprehensive collection of solutions and strategies to the acoustic and language modeling problems in KWS. It also offers insights into the realization of good-performance KWS systems. Experimental results show that the data-efficient training process and data augmentation are the two directions providing the most prominent performance improvement for KWS systems. While modifying system optimization objectives provides smaller yet consistent performance enhancement in KWS systems with different configurations. The effects of the proposed acoustic and language modeling approaches in the three directions are also shown to be additive and can be combined to further improve the overall KWS system performance.
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Zhu, Huang. "A transaction model for environmental resource dependent Cyber-Physical Systems." Diss., Kansas State University, 2014. http://hdl.handle.net/2097/18122.
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Doctor of PhilosophyDepartment of Computing and Information Sciences
Gurdip Singh
Cyber-Physical Systems (CPSs) represent the next-generation systems characterized by strong coupling of computing, sensing, communication, and control technologies. They have the potential to transform our world with more intelligent and efficient systems, such as Smart Home, Intelligent Transportation System, Energy-Aware Building, Smart Power Grid, and Surgical Robot. A CPS is composed of a computational and a physical subsystem. The computational subsystem monitors, coordinates and controls operations of the physical subsystem to create desired physical effects, while the physical subsystem performs physical operations and gives feedback to the computational subsystem. This dissertation contributes to the research of CPSs by proposing a new transaction model for Environmental Resource Dependent Cyber-Physical Systems (ERDCPSs). The physical operations of such type of CPSs rely on environmental resources, and they are commonly seen in areas such as transportation and manufacturing. For example, an autonomous car views road segments as resources to make movements and a warehouse robot views storage spaces as resources to fetch and place goods. The operating environment of such CPSs, CPS Network, contains multiple CPS entities that share common environmental resources and interact with each other through usages of these resources. We model physical operations of an ERDCPS as a set of transactions of different types that achieve different goals, and each transaction consists of a sequence of actions. A transaction or an action may require environmental resources for its operations, and the usage of an environmental resource is precise in both time and space. Moreover, a successful execution of a transaction or an action requires exclusive access to certain resources. Transactions from different CPS entities of a CPS Network constitute a schedule. Since environmental resources are shared, transactions in the schedule may have conflicts in using these resources. A schedule must remain consistent to avoid unexpected consequences caused by resource usage conflicts between transactions. A two-phase commit algorithm is proposed to process transactions. In the pre-commit phase, a transaction is scheduled by reserving usage times of required resources, and potential conflicts are detected and resolved using different strategies, such as Win-Lose, Win-Win, and Transaction Preemption. Two general algorithms are presented to process transactions in the pre-commit phase for both centralized and distributed resource management environments. In the commit phase, a transaction is executed using reserved resources. An exception occurs when the real-time resource usage is different from what has been predicted. By doing internal and external check before a scheduled transaction is executed, exceptions can be detected and handled properly. A simulation platform (CPSNET) is developed to simulate the transaction model. The simulation platform simulates a CPS Network, where different CPS entities coordinate resource usages of their transactions through a Communication Network. Depending on the resource management environment, a Resource Server may exist in the CPS Network to manage resource usages of all CPS entities. The simulation platform is highly configurable and configuration of the simulation environment, CPS entities and two-phase commit algorithm are supported. Moreover, various statistical information and operation logs are provided to monitor and evaluate the platform itself and the transaction model. Seven groups of simulation experiments are carried out to verify the simulation platform and the transaction model. Simulation results show that the platform is capable of simulating a large load of CPS entities and transactions, and entities and components perform their functions correctly with respect to the processing of transactions. The two-phase commit algorithm is evaluated, and the results show that, compared with traditional cases where no conflict resolving is applied or a conflicting transaction is directly aborted, the proposed conflict resolving strategies improve the schedule productivity by allowing more transactions to be executed and the scheduling throughput by maintaining a higher concurrency level.
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Lopez, Guerrero Miguel. "On network resource allocation using alpha-stable long-range dependent traffic models." Thesis, University of Ottawa (Canada), 2004. http://hdl.handle.net/10393/29136.
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Recent studies suggest that networks should be designed taking into account the long-range dependence and high-variability properties of the traffic they carry. It has been proven in the past that these two statistical properties can be properly represented using traffic models based on alpha-stable self-similar stochastic processes. Assuming this traffic modeling approach, in this dissertation we propose and evaluate some techniques for resource allocation. We propose suitable envelope processes for the levels of bandwidth demand which allows us to develop static resource allocation schemes. The proposal is based on a generalization, to the alpha-stable case, of the concept of probabilistic envelope processes, which have been previously defined for simpler models. It is shown that, with this approach, we can simply and effectively deal with much of the argued complexity encountered in alpha-stable models and develop techniques for proper dimensioning of network elements. From our analysis it is concluded that the presence of heavy tails in the distribution of the traffic process has a severe impact on the requirements of network resource. For instance, the multiplexing gain is negatively affected, which directly impacts the scale economies expected by service providers. In order to cope with these issues, dynamic resource allocation is also considered. A dynamic prediction-based resource allocation method is introduced and evaluated. It is shown that it significantly improves network utilization over static resource allocation schemes in trade for some signaling and processing overhead. Although other schemes based on prediction have been proposed, we use a novel linear prediction algorithm for symmetric fractional stable noise. This approach is intended for some traffic classes whose marginal distribution exhibits a heavy tail. The linear prediction algorithm we use was recently introduced by other researchers, but has not been studied in detail. Therefore, its performance evaluation is also carried out. In addition to this study on the prediction-based approach, a dynamic resource allocation scheme based on envelope processes is also introduced and evaluated. We conclude that when alpha-stable models are properly used and interpreted, they let us accurately represent network traffic and therefore design and analyze reliable resource allocation mechanisms.
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Darwish, Rami. "The Missing link : Business Models Lock-in in Sociotechnical Transitions." Licentiate thesis, KTH, Industriell Management, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-249251.
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Societal and environmental challenges present challenges for our current industrial systems. In order to respond to these difficulties, various alternative systems have been suggested, as they promise sustainability and increased societal quality of life enabled by innovative technologies. These future solutions hold the capacity to solve problems by unlocking considerable business potential. However, the journey to the forthcoming era will bring dramatic changes, not only to the success of incumbent industrial stakeholders but also to their very existence. The upcoming changes are impregnated with hazards to current business models of successful organizations. So, one may ask what impact future technologies may have on the realms that industrial actors live in? To disentangle the complexity of the unknowns, multitudes of collaborative efforts in protected spaces have emerged globally to experiment with potential systems on the road to sociotechnical transitions. The transport sector is undergoing efforts towards transitions to future sustainable systems. This sector has a special focus when it comes to sustainability challenges due to its substantial economic and environmental impact. Bus systems are at the heart of this challenge due to the central role they play in urban mobility. Hence, different fuels and charging technologies for buses have been tested in pilot projects to facilitate the march towards sustainability; electric charging is one of the promising technologies, which achieve this aim. However, current business models of incumbent transport stakeholders seem to be problematic, and changes to facilitate the transitions seem to be complex. Extant literature indicates a critical role of business models under sociotechnical transitions. Theoretically, there is an underlying need for incumbents to change their business models to reap the benefits of innovative technologies. However, this change is difficult and potential business models are far from clear. With that, the dynamics of business models under transition remains as an underexplored area, and the challenge to incumbent business models poses itself as an interesting area to gauge. Under this umbrella, a question arises regarding how the pressure on incumbent business models interacts with systemic innovations. This thesis is a case study of an incumbent bus operator participating in a pilot project on a future bus system. The case study is in-depth in nature and investigates the potential business model of a bus operator in a multiple stakeholder pilot project, which tests an inductive electric hybrid bus. With a strong empirical exploratory nature, this thesis is built on an “insider” single case study that occurred in the year 2016-2017. The focus of the study is on the pressure on bus operator business model in the face of systemic innovation. The findings reveal positive future value proposition, disrupted value creation, and unclear value capture in the potential business model of the operator. Moreover, the findings show lock-in and resource dependence situation of the operator’s current business model. The lock-in of the business model hinder the transition to future sociotechnical bus system and makes it difficult to commercialize the new technology. The outcome of this thesis speaks to a significant influence of history and the regulator, manifested by rules on the future of business models of commercial incumbent stakeholders. This demonstrates lock-in may prove to be a major impediment, and that unchained and flexible business model of incumbents is critical for further continuation of successful shifts. Given these findings, this thesis suggests applying the business model lens to pilot projects for sustainability. This would aid in better comprehending how current business models may facilitate or hinder favorable transitions. This knowledge informs both managerial decisions and policy making, especially when it comes to resource optimization and investment decisions.QC 20190416
Wireless Bus Stop Charging
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Chou, Tiang-Hong. "A Longitudinal Examination of How Hospital Provision of Home Health Services Changed after the Implementation of the Balanced Budget Act of 1997: Does Ownership Matter?" VCU Scholars Compass, 2009. https://scholarscompass.vcu.edu/etd/1985.
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By using a natural experiment approach and longitudinal national hospital data, this study sheds light on the objective functions of hospitals with different ownership forms by comparing their relative reductions in HH provision after the implementation of the BBA. The empirical findings reveal that for-profit hospitals behave differently as compared to public and private nonprofit hospitals, due to their different operational objectives. While the response of for-profit hospitals is consistent with the profit-maximizer model, both public and private nonprofit ownership types behave consistently in accordance with the model of two-good producers whose objective is to maximize market outputs for meeting the health care needs of the community, given the break-even requirement. This finding provides support for the tax exemption the United States government has granted private nonprofit hospitals. Although the response patterns of the nonprofit ownership types are in general similar, this study found that, contrary to expectation, religious hospitals were more likely than secular nonprofit hospitals to have reduced HH provision after the BBA. Further studies are needed to explore the difference in operational behaviors between these two ownership types. Built on previous related studies and applying a more comprehensive set of independent and control variables with improved data sources, this study is able to examine the effects of certain organizational and market factors on hospital offering of HH care pre-BBA and the change in the provision of HH care in the six years following the implementation of the BBA. Hospital proportion of Medicare patients, hospital size, total profit margin, case mix index, elderly density in the market are found to be positive determinants of a hospital’s likelihood of offering HH care. However, these organizational and market factors, in general, play a non-significant role in influencing hospitals’ changes in HH care provision after the implementation of the BBA. In the study, explanations and implications of these finding are discussed. Finally, potential limitations to this study and opportunities for future research are addressed.
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Dömeland, Narvaez Dörte. "Empirical studies on human capital and natural resources." Doctoral thesis, Universitat Pompeu Fabra, 2006. http://hdl.handle.net/10803/7345.
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El primer capítulo de la tesis sobre "Estudios Empíricos sobre Capital Humano e Instituciones" presenta estimaciones de retornos a la educación en Alemania y analiza los determinantes de las preferencias educativas. El segundo capítulo utiliza estimaciones de retornos a la experiencia en el país de origen de inmigrantes en Estados Unidos para proporcionar evidencia empírica que el comercio aumenta la acumulación de capital humano en el trabajo, incluso en los países menos desarrollados, resolviendo la ambigüedad teórica si el comercio aumenta o disminuye "learning-by-doing". La acumulación de capital humano en el trabajo es también positivamente asociada con el PIB per capita, un alto nivel de educación y una mayor calidad de políticas e instituciones. El último capítulo analiza el efecto de recursos naturales y asistencia externa sobre la calidad de instituciones, proporcionando evidencia empírica que -contrario a la asistencia externa, la abundancia de mineral y combustible tiende a ser asociada negativamente con la calidad de instituciones si la fragmentación étnica es grande.The first chapter of the thesis on "Empirical Studies on Human Capital and Institutions" presents estimates of returns to education in Germany and analyses the determinants of educational choices. The second chapter uses estimated returns to home country experience of US immigrants to provide empirical evidence that trade increases on-the-job human capital accumulation even in less developed countries, thereby resolving the theoretical ambiguity whether trade increases or decreases learning-by-doing. Similar to trade, GDP per capita, a high average level of educational attainment and stronger quality of policy and institutions are found to be positively associated with on-the-job human capital accumulation. The last chapter analyses the effect of natural resources and aid on institutions, providing empirical evidence that contrary to aid, mineral and fuel abundance tends to be associated with significantly lower quality of institutions if ethnic fractionalization is large.
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Lawson, Albertha H. "A Study of the Relationship Between Revenue Sources and Undergraduate Students' Graduation Rates at Public Research Universities." ScholarWorks@UNO, 2011. http://scholarworks.uno.edu/td/1325.
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The public's demand for accountability will have a significant impact on research universities' revenue resources in the future. Driving the demand is a perceived lack of institutional productivity. Undergraduate students' graduation rates represent one product of public research universities. States have already latched onto these rates as a measure of institutional performance; and as a result, states have provided a basis for public research universities to use the relationship between dollars invested in the institution and undergraduate students' graduation rates to respond to accountability issues. Current research provides little insight into this relationship. Research in this study uses concepts from the higher education production function, the resource dependency theory, and the Principal-Agent Model to investigate undergraduate students' four-year and six-year graduation rates as an institutional product. The research provides a greater degree of transparency into the relationship between dollars invested in public research universities and undergraduate students' graduation rates than has previously been shown. As a result of this relationship analysis, the research enables the development of a model for predicting undergraduate student graduation rates relative to dollars invested in the institution from different sources.
Books on the topic "Resource Dependence Model"
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Khadr, Ali M. Nonrenewable resource allocation under intertemporally dependent demand. Oxford: Oxford Institute for Energy Studies, 1987.
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Chopar, Kanchan. The nature of household dependence on common pool resources: An econometric study for India. Delhi: Institute of Economic Growth, 2003.
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Cavaciocchi, Simonetta, ed. Le interazioni fra economia e ambiente biologico nell'Europa preindustriale secc. XIII-XVIII. Economic and biological interactions in pre-industrial Europe from the 13th to the 18th centuries. Florence: Firenze University Press, 2010. http://dx.doi.org/10.36253/978-88-8453-596-2.
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Pests, parasites and pathogenic agents have exerted a notable influence on the process of economic development of pre-industrial Europe, in view of their influence on the health, longevity and reproduction of human beings, plants and animals. On each occasion man has reacted to biological uncertainty with responses that were public or private, formal or informal and differed in both efficacy and cost. Success has always been partial, and dependent on experience, knowledge and the investment of economic resources. These reciprocal influences have never been allocated an appropriate or convincing place in the institutional model or those of Smith, Malthus, Ricardo or Marx, typically exploited to describe and explain the flux and reflux of the economic development of pre-industrial Europe. In these proceedings of Study Week promoted by the Fondazione Datini, the leading experts in the sector have undertaken to analyse, exemplify and discuss the precise nature of the complex interactions between economic and biological processes and agents. Adopying a stimulating, innovative and interdisciplinary approach, they appraise the degree to which such processes acted in reciprocal independence, whether there was a significant co-evolution and what prospects there are for developing explanatory models that better grasp the essentially bilateral nature of such interactions.
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Essington, Timothy E. Introduction to Quantitative Ecology. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780192843470.001.0001.
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Modern practice of ecology, conservation, and resource management demands unprecedented levels of quantitative proficiency in mathematical modeling and statistics. This text provides foundational training in the concepts and methods of mathematical and statistical modeling used in ecology, for readers with all levels of quantitative proficiency and confidence. The first chapter presents a generalized approach to develop ecological models and introduces the “describe, explain, and interpret” framework for linking the model world to the real world. Detailed treatment of population models illustrates the myriad ways in which one can develop a model, shows how modeling choices are informed by the ecological question at hand, and emphasizes the epistemology of quantitative techniques. The second part of the book illustrates how to estimate parameters of models from data, and how to use mathematical models combined with statistics to test hypotheses. The third part of the book is devoted to an in-depth development of technical skills to implement models in two common platforms: spreadsheets and the R programming language. The book concludes by demonstrating a quantitative approach to addressing a question that spans density-dependent versus density-independent population models, fitting models to data, evaluating the strength for density dependence using model selection, and evaluating the types of dynamic behaviors that the population might exhibit.
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Washington State Institute for Public Policy., ed. The family resource wage progression model: Estimating resources available to low-income families in Washington State. Olympia, WA: Washington State Institute for Public Policy, 1998.
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Washington State Institute for Public Policy., ed. The family resource wage progression model: Estimating resources available to low-income families in Washington State. Olympia, WA: Washington State Institute for Public Policy, 1998.
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Alajmi, Abdullah. The Model Immigrant. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190608873.003.0004.
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In the early 1950s, Kuwait underwent rapid urbanization during which first-generation Hadramis were swiftly absorbed into Kuwaiti urban houses assuming domestic service roles. It is argued that the socioeconomic path of house-serving shaped the Hadrami character and experience of the “model immigrant” as we know it today. However, the study also demonstrates how a Hadrami migratory practice of dependency on the local family and sponsor was inspired by a Kuwaiti cultural and official categorization process of different immigrant groups in which the Hadramis were depicted as loyal, easily satisfied, and non-subversive. While dependency was valued by old Hadramis as a resource and as a form of social capital, it also continued to inform the perceptions, expectations, and actions of the second-generation Hadramis. This chapter analyzes the ways in which the whole experience was conceptualized and contested in daily interaction of the two generations. This study reveals that young Hadramis’ daily activities in Kuwait, and their aspirations for individual self-sufficiency and mobility, can only be carried out by maintaining a difficult balance between the social-triad, and by managing, or perhaps preserving, the legacy of “good reputation.”
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Miller, Thomas E., William E. Bradshaw, and Christina M. Holzapfel. Pitcher-plant communities as model systems for addressing fundamental questions in ecology and evolution. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198779841.003.0024.
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Carnivorous plants have close associations with other species that live in or on the plant. Sarracenia purpurea has a particularly large number of inquiline species, many of which are obligates that live in its water-filled leaves. These include a well-studied food web of bacteria, protozoa, rotifers, mites, and Diptera larvae, all of which depend on the prey of the host plant. This model system has been used to address fundamental questions in ecology and evolution, including studies of keystone predation, succession, consumer versus resource control, invasion, dispersal, and the roles of resources and predators in metacommunities. The microecosystem also has been used to understand density-dependent selection, the genetic structure of populations, evolution over climatic gradients, and evolution in a multispecies, community context. In this chapter, the ecology of this potentially mutualistic contained community is explored in the context of its carnivorous host.
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Lamei, Aya. Technical-Economic Model for Integrated Water Resources Management in Tourism Dependent Arid Coastal Regions: UNESCO-IHE PhD Thesis. Taylor & Francis Group, 2017.
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Lamei, Aya. Technical-Economic Model for Integrated Water Resources Management in Tourism Dependent Arid Coastal Regions; the Case of Sharm el Sheikh, Egypt. Taylor & Francis Group, 2009.
Find full textBook chapters on the topic "Resource Dependence Model"
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Kruck, Andreas. "The Theoretical Model: An Embedded Resource Dependence View on Delegation." In Private Ratings, Public Regulations, 80–130. London: Palgrave Macmillan UK, 2011. http://dx.doi.org/10.1057/9780230307384_3.
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Straub, Detmar, Peter Weill, and Kathy S. Schwaig. "Strategic Dependence on the IT Resource and Outsourcing: A Test of the Strategic Control Model." In Information Systems Outsourcing, 175–99. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-88851-2_8.
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Sommerrock, Katharina. "The Resource Dependency of Organizations." In Social Entrepreneurship Business Models, 94–121. London: Palgrave Macmillan UK, 2010. http://dx.doi.org/10.1057/9780230298033_6.
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Liang, Yi, and Chaohui Zhang. "Resource Scheduling Strategy for Spark in Co-allocated Data Centers." In Proceeding of 2021 International Conference on Wireless Communications, Networking and Applications, 114–22. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2456-9_13.
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AbstractThe co-allocated data centers are to deploy online services and offline workloads in the same cluster to improve the utilization of resources. Spark application is a typical offline batch workload. At present, the resource scheduling strategy for co-allocated data centers mainly focuses on online services. Spark applications still use the original resource scheduling, which can’t solve the data dependency and deadline problems between spark applications and online services. This paper proposes a data-aware resource-scheduling model to meet the deadline requirement of Spark application and optimize the throughput of data processing on the premise of ensuring the quality of service of online services.
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Choudhury, Gagan L., Kin K. Leung, and Ward Whitt. "Resource-Sharing Models with State-Dependent Arrivals of Batches." In Computations with Markov Chains, 255–82. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4615-2241-6_16.
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Bliudze, Simon, Alena Simalatsar, and Alina Zolotukhina. "Constraint-Flow Nets: A Model for Building Constraints from Resource Dependencies." In Lecture Notes in Computer Science, 197–216. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59746-1_11.
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Hayter, Roger, and Alex Clapp. "The Remapping of Forest Governance: From Shareholder to Stakeholder." In Knowledge for Governance, 375–95. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-47150-7_16.
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AbstractResource conflicts are widespread features of contemporary globalization. In forestry-related resource peripheries, such as British Columbia (BC), various societal stakeholders are demanding a reform of resource uses away from industrial priorities towards more ecological and cultural ones. Forest conflicts represent institutional clashes that lead to new forms of governance based on new inventories, resource maps, science, and zoning. The authors of this paper analyze the remapping of forest resources in BC as part of broader paradigmatic transformations of society and economy from shareholder to stakeholder models of resource governance, i.e. as a shift in policy-making from hierarchical control by governments and markets to more diffuse, democratic forms of governance. This process is accompanied by institutional innovation and thickening that still need to be assessed for their effectiveness. Whether stakeholder remapping can be certified as good governance remains a context-dependent empirical question.
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Reussner, Ralf. "Counter-Constrained Finite State Machines: A New Model for Component Protocols with Resource-Dependencies." In SOFSEM 2002: Theory and Practice of Informatics, 20–40. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-36137-5_2.
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Bora, Aditya, Atharva Nirali, Chetana Chaudhari, Dhananjay Gavade, and Vikramdas Vaishnav. "A Time Dependent Epidemiology Model for Hospital Resource Management in Usual Scenarios and Pandemic." In Lecture Notes in Electrical Engineering, 501–10. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-3690-5_44.
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Ali, Hadi, and Ann McKenna. "Reopening Campuses: Visualizing the Structure of a System Problem." In Global Perspectives on Educational Innovations for Emergency Situations, 47–56. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-99634-5_5.
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AbstractThe process of reopening of college campuses in response to the impact of the COVID-19 pandemic sheds light on underlying features of the educational system. Understanding the various models of reopening gives us insight into how the education system is structured through the responses of the various college campuses—a unique opportunity to capturing issues of inertial momentum against change in the past, and projecting into the future. We propose visualizing the structure of a system problem as a way to allow the problem to become visible through mental models. We illustrate our approach through causal loops—the core tool for systems thinking. We discuss the construction of one visual model, based on publicly available resources, to be used as a starting point for a discussion. The model points to the importance of making informed, high-level early decisions, in the case of a crisis, as this shows to be a highly dependent variable in the model. This finding is shown to be supported by ongoing research on faculty adaptability in different contexts. Visualizing mental models in systems thinking does not seek to unnecessarily capture all the details of the complexity of the educational system; rather, it aims to externalize deep problems, which, in turn, demonstrate opportunities for transformation in the future.
Conference papers on the topic "Resource Dependence Model"
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Waseda, Takuji, Sho Asaumi, and Keiji Kiyomatsu. "Improving Resource Assessment of Wave Power Based on Spectral Wave Model." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-24492.
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Epistemic uncertainties of wave power estimation based on spectral wave model were assessed utilizing the community wave model WW3 of NOAA. A four tiered nested model was constructed covering the Pacific Ocean, the sea around Japan, the North-Eastern Japan and Kamaishi regional model at 100km, 10km, 1km and 100m resolutions respectively. The sensitivity of the model output to four wind products (NCEP-GFS, NCEP-CFSR, GSM/JMA, ERA-interim/ECWMF) was tested; the wave model outputs as well as wind products were validated against observations of NDBC buoys, JKEO/JAMSTEC buoy, TAO array and NOWPHAS buoy along the north-eastern Japan. The differences of the estimations using four wind products were relatively small whereas model errors were spatially inhomogeneous. The dependence on grid-resolution was relatively small at depth 100m or so. On the other hand, the modeled significant wave period had a large bias from the observation because of the inconsistency in the spectral moment used to estimate the significant wave period. The energy period (T-1,0) was 5% larger than the period from WW3 (T-0.5,0) and 20% larger than the period from NDBC (T0,2). The difference of wave period, dependent on the spectral shape and location, are often overlooked despite their significant impact on the resource estimate.
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Moustafa, Kassem, Zhen Hu, Zissimos P. Mourelatos, Igor Baseski, and Monica Majcher. "Resource Allocation for System Reliability Analysis Using Accelerated Life Testing." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-97616.
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Abstract Accelerated life test (ALT) has been widely used to accelerate the product reliability assessment process by testing product at higher than nominal stress conditions. For a system with multiple components, the tests can be performed at component-level or system-level. The data at these two levels require different amount of resources to collect and carry different values of information for system reliability assessment. Even though component-level tests are cheap to perform, they cannot account for the correlations between the failure time distributions of different components. While system-level tests can naturally account for the complicated dependence between component failure time distributions, the required testing efforts are much higher than that of component-level tests. This research proposes a novel resource allocation framework for ALT-based system reliability assessment. A physics-informed load model is first employed to bridge the gap between component-level tests and system-level tests. An optimization framework is then developed to effectively allocate testing resources to different types of tests. The information fusion of component-level and system-level tests allows us to accurately estimate the system reliability with a minimized requirement on the testing resources. Results of one numerical example demonstrate the effectiveness of the proposed framework.
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Rudovsky, Pavel N., and Irina S. Belova. "The dependence of the forces of adhesion of the fibers to the binder concentration of adhesive in the manufacture of glue yarn." In INTERNATIONAL SCIENTIFIC-TECHNICAL SYMPOSIUM (ISTS) «IMPROVING ENERGY AND RESOURCE-EFFICIENT AND ENVIRONMENTAL SAFETY OF PROCESSES AND DEVICES IN CHEMICAL AND RELATED INDUSTRIES». The Kosygin State University of Russia, 2021. http://dx.doi.org/10.37816/eeste-2021-1-371-374.
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An experiment was conducted to measure the adhesion forces of PVA, PVA and sericin adhesive solutions to cellulose materials. A model of the dependence of the adhesion forces on the concentration of the adhesive substance is proposed.
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Simakov, Nikolai N. "Comparison calculating of apparatus with spray of liquid for interphase mass exchange at direct and reverse gas flow." In INTERNATIONAL SCIENTIFIC-TECHNICAL SYMPOSIUM (ISTS) «IMPROVING ENERGY AND RESOURCE-EFFICIENT AND ENVIRONMENTAL SAFETY OF PROCESSES AND DEVICES IN CHEMICAL AND RELATED INDUSTRIES». The Kosygin State University of Russia, 2021. http://dx.doi.org/10.37816/eeste-2021-1-153-157.
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The article presents the results of a comparative calculation of direct flow and counter flow mass transfer spray apparatuses using the dependence Cd = 2000/Re2 in the earlier proposed model of hydrodynamics and mass transfer of phases in a flow of spray
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Khmelev, Vladimir N., Andrey V. Shalunov, Roman N. Golykh, Viktor A. Nesterov, and Alexander S. Bochenkov. "Simulation of vortex acoustic flows in air gap as a factor of contactless ultrasonic intensification of chemicaltechnological processes." In INTERNATIONAL SCIENTIFIC-TECHNICAL SYMPOSIUM (ISTS) «IMPROVING ENERGY AND RESOURCE-EFFICIENT AND ENVIRONMENTAL SAFETY OF PROCESSES AND DEVICES IN CHEMICAL AND RELATED INDUSTRIES». The Kosygin State University of Russia, 2021. http://dx.doi.org/10.37816/eeste-2021-1-190-194.
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A numerical model of the formation of acoustic flows in the air gap is proposed. Visualization patterns of the calculated flows generated by various types of emitters are constructed. The dependence of the flow rate on the thickness of the air gap including the resonance thickness is revealed.
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Chatziris, Giannis, Victor Scholten, and Willem Hulsink. "Learning to incubate: evidence from Greece (1995-2005)." In 16th Annual High Technology Small Firms Conference, HTSF 2008. University of Twente, 2008. http://dx.doi.org/10.3990/2.268578282.
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Aim of the present study is to analyze and explain the contribution of business incubators to the promotion of entrepreneurship. Drawing upon previous research findings and three distinct theoretical perspectives, namely the resource-based view, the resource dependence approach and the social capital theory, we propose a theoretical framework allowing for a pattern-benchmark model for successful business incubation. After gathering secondary data on the business incubation industry in Greece, and qualitative data through face-to-face interviews with Greek incubators’ managers, the model is empirically validated in order to sketch the particular incubation landscape and identify best practices. The cases that are examined through a comparative analysis based on our research framework revealed that incubators were developed in two expansion waves, representing different ownership structures and objectives. The findings are further discussed for their theoretical, managerial and policy implications, while some recommendations for the further development of the industry are provided.
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Kolesnikov, Andrey Vitalievich. "Nonlinear sociodynamics of competitive sociotypes of molecular and cosmic human." In 4th International Conference “Futurity designing. Digital reality problems”. Keldysh Institute of Applied Mathematics, 2021. http://dx.doi.org/10.20948/future-2021-19.
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As one of the most important factors determining the nature of the dynamic behavior of a social system, the article considers the competitive relationship of two alternative sociotypes, conventionally designated as molecular human and cosmic human. The molecular sociotype is understood as the personality of the average consumer, whose behavioral determinants are largely determined by the selfish gene. The cosmic human is a person who has realized the dependence on the selfish gene. Representatives of the cosmic sociotype consider the products of their own mind, their contribution to culture, as a more significant function than gene replication. This explains the different values of the coefficients of reproduction of the total resource of the system by molecular human and cosmic human. Three possible scenarios for the evolution of a social system have been identified for different values of the coefficients of reproduction of the total resource of the system by both sociotypes with a constant share of the population. In this case, the aggregate resource is understood as the entire intellectual, cultural and economic product produced by the social system during a certain conditional cycle of reproduction. The dynamics of a social system with a variable value of the share of a productive comic sociotype is considered in the work on the basis of a nonlinear two-dimensional model. The mathematical model demonstrates complex nonlinear quasicyclic behavior.
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Sedighi, Somayeh, and Miklós Szanyi. "Good governance." In The Challenges of Analyzing Social and Economic Processes in the 21st Century. Szeged: Szegedi Tudományegyetem Gazdaságtudományi Kar, 2020. http://dx.doi.org/10.14232/casep21c.10.
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Resource-rich countries experience a slow development rate in manufacturing sectors compared to countries with scarce resources. it has been a challenge to demystify the slow development in manufacturing sectors in those countries, therefore this study aimed to develop an efficient model to estimate the effects of good governance and natural resource rents on the performance of manufacturing export in countries endowed in natural resources. In this study world bank data for the year, 2000 to 2016 and the panel data model from 14 countries rich in natural resources were used alongside the six dependent variable indices including good governance, natural resource rents, real exchange rate, and gross domestic product (GDP). The results revealed that an increase in natural resources (NR), rule of low (RL), control of corruption (CC) as well as a reduction in inflation (INF) in countries under investigation will lead to increase in Manufacturing export. As well as an increase in Real Exchange Rate (RER) will lead to a reduction in the Manufacturing export of these countries. Hence demystify the slow development rate in manufacturing sectors in resource-rich countries.
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Ahn, Jeeyea, Yunyeong Heo, Seung Jun Lee, Ronald Boring, and Jooyoung Park. "Dynamic Approach to Dependency Analysis in Human Reliability Analysis: Application in a Steam Generator Tube Rupture Scenario." In 13th International Conference on Applied Human Factors and Ergonomics (AHFE 2022). AHFE International, 2022. http://dx.doi.org/10.54941/ahfe1001571.
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Dependence analysis refers to a method for adjusting the failure probability for a human action by considering the impact of the preceding human action in human reliability analysis (HRA). Most of the existing dependence analysis methods have been developed based on the approach suggested in the Technique for Human Error-Rate Prediction (THERP) HRA method. However, the THERP-based approaches may have limitations. For instance, it inevitably presents challenges regarding both the subjectivity of expert evaluation as well as experience using dependence for resource-intensive and time-consuming complex analyses. In addition, the THERP-based quantification approaches rarely explain the adjustment of human error probabilities (HEPs), since the quantification processes do not concretely account for the context at the moment when the action is present. For these reasons, the authors’ previous studies have conceptually suggested a dynamic approach to evaluating dependencies by extending the existing performance shaping factor (PSF) concept used for quantifying HEPs in HRA. The conventional PSF modeling methods are limited to separate modeling for each HFE. However, this study suggests PSFs can affect a set of human actions or a multiple HFE rather than a single HFE. With this assumption, the authors simplified the dependency analysis process to efficiently evaluate dependencies and increase the quantification speed with more explicable backgrounds. In this paper, the authors mainly focus on dependency quantification over time. This study utilizes the eight PSFs suggested in the Standardized Plant Analysis Risk-HRA (SPAR-H) method. The mathematical models and logical algorithms are investigated through literature. Integrating the effects of PSFs to generate HEPs with dependency effects is also investigated. Then, the applicability of the dynamic method is investigated based on a design-based accident scenario, steam generator tube rupture. Lastly, insights from this approach are discussed in the paper.
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Duong, Long, Trevor Cohn, Steven Bird, and Paul Cook. "A Neural Network Model for Low-Resource Universal Dependency Parsing." In Proceedings of the 2015 Conference on Empirical Methods in Natural Language Processing. Stroudsburg, PA, USA: Association for Computational Linguistics, 2015. http://dx.doi.org/10.18653/v1/d15-1040.
Full textReports on the topic "Resource Dependence Model"
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Knox, R., and P. Harcombe. Testing the scale-dependence of models of resource competition and environmental conditions for forest structure and dynamics. Office of Scientific and Technical Information (OSTI), January 1990. http://dx.doi.org/10.2172/7052057.
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Knox, R. G., and P. A. Harcombe. Testing the scale dependence of models of resource competition and environmental conditions for forest structure and dynamics. Final performance report. Office of Scientific and Technical Information (OSTI), December 1995. http://dx.doi.org/10.2172/134999.
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Seginer, Ido, James Jones, Per-Olof Gutman, and Eduardo Vallejos. Optimal Environmental Control for Indeterminate Greenhouse Crops. United States Department of Agriculture, August 1997. http://dx.doi.org/10.32747/1997.7613034.bard.
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Increased world competition, as well as increased concern for the environment, drive all manufacturing systems, including greenhouses, towards high-precision operation. Optimal control is an important tool to achieve this goal, since it finds the best compromise between conflicting demands, such as higher profits and environmental concerns. The report, which is a collection of papers, each with its own abstract, outlines an approach for optimal, model-based control of the greenhouse environment. A reliable crop model is essential for this approach and a significant portion of the effort went in this direction, resulting in a radically new version of the tomato model TOMGRO, which can be used as a prototype model for other greenhouse crops. Truly optimal control of a very complex system requires prohibitively large computer resources. Two routes to model simplification have, therefore, been tried: Model reduction (to fewer state variables) and simplified decision making. Crop model reduction from nearly 70 state variables to about 5, was accomplished by either selecting a subset of the original variables or by forming combinations of them. Model dynamics were then fitted either with mechanistic relationships or with neural networks. To simplify the decision making process, the number of costate variables (control policy parametrs) was recuced to one or two. The dry-matter state variable was transformed in such a way that its costate became essentially constant throughout the season. A quasi-steady-state control algorithm was implemented in an experimental greenhouse. A constant value for the dry-matter costate was able to control simultaneously ventilation and CO2 enrichment by continuously producing weather-dependent optimal setpoints and then maintaining them closely.
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Zhang, Renduo, and David Russo. Scale-dependency and spatial variability of soil hydraulic properties. United States Department of Agriculture, November 2004. http://dx.doi.org/10.32747/2004.7587220.bard.
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Water resources assessment and protection requires quantitative descriptions of field-scale water flow and contaminant transport through the subsurface, which, in turn, require reliable information about soil hydraulic properties. However, much is still unknown concerning hydraulic properties and flow behavior in heterogeneous soils. Especially, relationships of hydraulic properties changing with measured scales are poorly understood. Soil hydraulic properties are usually measured at a small scale and used for quantifying flow and transport in large scales, which causes misleading results. Therefore, determination of scale-dependent and spatial variability of soil hydraulic properties provides the essential information for quantifying water flow and chemical transport through the subsurface, which are the key processes for detection of potential agricultural/industrial contaminants, reduction of agricultural chemical movement, improvement of soil and water quality, and increase of agricultural productivity. The original research objectives of this project were: 1. to measure soil hydraulic properties at different locations and different scales at large fields; 2. to develop scale-dependent relationships of soil hydraulic properties; and 3. to determine spatial variability and heterogeneity of soil hydraulic properties as a function of measurement scales. The US investigators conducted field and lab experiments to measure soil hydraulic properties at different locations and different scales. Based on the field and lab experiments, a well-structured database of soil physical and hydraulic properties was developed. The database was used to study scale-dependency, spatial variability, and heterogeneity of soil hydraulic properties. An improved method was developed for calculating hydraulic properties based on infiltration data from the disc infiltrometer. Compared with the other methods, the proposed method provided more accurate and stable estimations of the hydraulic conductivity and macroscopic capillary length, using infiltration data collected atshort experiment periods. We also developed scale-dependent relationships of soil hydraulic properties using the fractal and geostatistical characterization. The research effort of the Israeli research team concentrates on tasks along the second objective. The main accomplishment of this effort is that we succeed to derive first-order, upscaled (block effective) conductivity tensor, K'ᵢⱼ, and time-dependent dispersion tensor, D'ᵢⱼ, i,j=1,2,3, for steady-state flow in three-dimensional, partially saturated, heterogeneous formations, for length-scales comparable with those of the formation heterogeneity. Numerical simulations designed to test the applicability of the upscaling methodology to more general situations involving complex, transient flow regimes originating from periodic rain/irrigation events and water uptake by plant roots suggested that even in this complicated case, the upscaling methodology essentially compensated for the loss of sub-grid-scale variations of the velocity field caused by coarse discretization of the flow domain. These results have significant implications with respect to the development of field-scale solute transport models capable of simulating complex real-world scenarios in the subsurface, and, in turn, are essential for the assessment of the threat posed by contamination from agricultural and/or industrial sources.
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Pichersky, Eran, Alexander Vainstein, and Natalia Dudareva. Scent biosynthesis in petunia flowers under normal and adverse environmental conditions. United States Department of Agriculture, January 2014. http://dx.doi.org/10.32747/2014.7699859.bard.
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The ability of flowering plants to prosper throughout evolution, and for many crop plants to set fruit, is strongly dependent on their ability to attract pollinators. To that end many plants synthesize a spectrum of volatile compounds in their flowers. Scent is a highly dynamic trait that is strongly influenced by the environment. However, with high temperature conditions becoming more common, the molecular interplay between this type of stress and scent biosynthesis need to be investigated. Using petunia as a model system, our project had three objectives: (1) Determine the expression patterns of genes encoding biosynthetic scent genes (BSGs) and of several genes previously identified as encoding transcription factors involved in scent regulation under normal and elevated temperature conditions. (2) Examine the function of petunia transcription factors and a heterologous transcription factor, PAPl, in regulating genes of the phenylpropanoid/benzenoid scent pathway. (3) Study the mechanism of transcriptional regulation by several petunia transcription factors and PAPl of scent genes under normal and elevated temperature conditions by examining the interactions between these transcription factors and the promoters of target genes. Our work accomplished the first two goals but was unable to complete the third goal because of lack of time and resources. Our general finding was that when plants grew at higher temperatures (28C day/22C night, vs. 22C/16C), their scent emission decreased in general, with the exception of a few volatiles such as vanillin. To understand why, we looked at gene transcription levels, and saw that generally there was a good correlation between levels of transcriptions of gene specifying enzymes for specific scent compounds and levels of emission of the corresponding scent compounds. Enzyme activity levels, however, showed little difference between plants growing at different temperature regimes. Plants expressing the heterologous gene PAPl showed general increase in scent emission in control temperature conditions but emission decreased at the higher temperature conditions, as seen for control plants. Finally, expression of several transcription factor genes decreased at high temperature, but expression of new transcription factor, EOB-V, increased, implicating it in the decrease of transcription of BSGs. The major conclusion of this work is that high temperature conditions negatively affect scent emission from plants, but that some genetic engineering approaches could ameliorate this problem.
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McKenna, Patrick, and Mark Evans. Emergency Relief and complex service delivery: Towards better outcomes. Queensland University of Technology, June 2021. http://dx.doi.org/10.5204/rep.eprints.211133.
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Emergency Relief (ER) is a Department of Social Services (DSS) funded program, delivered by 197 community organisations (ER Providers) across Australia, to assist people facing a financial crisis with financial/material aid and referrals to other support programs. ER has been playing this important role in Australian communities since 1979. Without ER, more people living in Australia who experience a financial crisis might face further harm such as crippling debt or homelessness. The Emergency Relief National Coordination Group (NCG) was established in April 2020 at the start of the COVID-19 pandemic to advise the Minister for Families and Social Services on the implementation of ER. To inform its advice to the Minister, the NCG partnered with the Institute for Governance at the University of Canberra to conduct research to understand the issues and challenges faced by ER Providers and Service Users in local contexts across Australia. The research involved a desktop review of the existing literature on ER service provision, a large survey which all Commonwealth ER Providers were invited to participate in (and 122 responses were received), interviews with a purposive sample of 18 ER Providers, and the development of a program logic and theory of change for the Commonwealth ER program to assess progress. The surveys and interviews focussed on ER Provider perceptions of the strengths, weaknesses, future challenges, and areas of improvement for current ER provision. The trend of increasing case complexity, the effectiveness of ER service delivery models in achieving outcomes for Service Users, and the significance of volunteering in the sector were investigated. Separately, an evaluation of the performance of the NCG was conducted and a summary of the evaluation is provided as an appendix to this report. Several themes emerged from the review of the existing literature such as service delivery shortcomings in dealing with case complexity, the effectiveness of case management, and repeat requests for service. Interviews with ER workers and Service Users found that an uplift in workforce capability was required to deal with increasing case complexity, leading to recommendations for more training and service standards. Several service evaluations found that ER delivered with case management led to high Service User satisfaction, played an integral role in transforming the lives of people with complex needs, and lowered repeat requests for service. A large longitudinal quantitative study revealed that more time spent with participants substantially decreased the number of repeat requests for service; and, given that repeat requests for service can be an indicator of entrenched poverty, not accessing further services is likely to suggest improvement. The interviews identified the main strengths of ER to be the rapid response and flexible use of funds to stabilise crisis situations and connect people to other supports through strong local networks. Service Users trusted the system because of these strengths, and ER was often an access point to holistic support. There were three main weaknesses identified. First, funding contracts were too short and did not cover the full costs of the program—in particular, case management for complex cases. Second, many Service Users were dependent on ER which was inconsistent with the definition and intent of the program. Third, there was inconsistency in the level of service received by Service Users in different geographic locations. These weaknesses can be improved upon with a joined-up approach featuring co-design and collaborative governance, leading to the successful commissioning of social services. The survey confirmed that volunteers were significant for ER, making up 92% of all workers and 51% of all hours worked in respondent ER programs. Of the 122 respondents, volunteers amounted to 554 full-time equivalents, a contribution valued at $39.4 million. In total there were 8,316 volunteers working in the 122 respondent ER programs. The sector can support and upskill these volunteers (and employees in addition) by developing scalable training solutions such as online training modules, updating ER service standards, and engaging in collaborative learning arrangements where large and small ER Providers share resources. More engagement with peak bodies such as Volunteering Australia might also assist the sector to improve the focus on volunteer engagement. Integrated services achieve better outcomes for complex ER cases—97% of survey respondents either agreed or strongly agreed this was the case. The research identified the dimensions of service integration most relevant to ER Providers to be case management, referrals, the breadth of services offered internally, co-location with interrelated service providers, an established network of support, workforce capability, and Service User engagement. Providers can individually focus on increasing the level of service integration for their ER program to improve their ability to deal with complex cases, which are clearly on the rise. At the system level, a more joined-up approach can also improve service integration across Australia. The key dimensions of this finding are discussed next in more detail. Case management is key for achieving Service User outcomes for complex cases—89% of survey respondents either agreed or strongly agreed this was the case. Interviewees most frequently said they would provide more case management if they could change their service model. Case management allows for more time spent with the Service User, follow up with referral partners, and a higher level of expertise in service delivery to support complex cases. Of course, it is a costly model and not currently funded for all Service Users through ER. Where case management is not available as part of ER, it might be available through a related service that is part of a network of support. Where possible, ER Providers should facilitate access to case management for Service Users who would benefit. At a system level, ER models with a greater component of case management could be implemented as test cases. Referral systems are also key for achieving Service User outcomes, which is reflected in the ER Program Logic presented on page 31. The survey and interview data show that referrals within an integrated service (internal) or in a service hub (co-located) are most effective. Where this is not possible, warm referrals within a trusted network of support are more effective than cold referrals leading to higher take-up and beneficial Service User outcomes. However, cold referrals are most common, pointing to a weakness in ER referral systems. This is because ER Providers do not operate or co-locate with interrelated services in many cases, nor do they have the case management capacity to provide warm referrals in many other cases. For mental illness support, which interviewees identified as one of the most difficult issues to deal with, ER Providers offer an integrated service only 23% of the time, warm referrals 34% of the time, and cold referrals 43% of the time. A focus on referral systems at the individual ER Provider level, and system level through a joined-up approach, might lead to better outcomes for Service Users. The program logic and theory of change for ER have been documented with input from the research findings and included in Section 4.3 on page 31. These show that ER helps people facing a financial crisis to meet their immediate needs, avoid further harm, and access a path to recovery. The research demonstrates that ER is fundamental to supporting vulnerable people in Australia and should therefore continue to be funded by government.
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Friedman, Shmuel, Jon Wraith, and Dani Or. Geometrical Considerations and Interfacial Processes Affecting Electromagnetic Measurement of Soil Water Content by TDR and Remote Sensing Methods. United States Department of Agriculture, 2002. http://dx.doi.org/10.32747/2002.7580679.bard.
Full textAbstract:
Time Domain Reflectometry (TDR) and other in-situ and remote sensing dielectric methods for determining the soil water content had become standard in both research and practice in the last two decades. Limitations of existing dielectric methods in some soils, and introduction of new agricultural measurement devices or approaches based on soil dielectric properties mandate improved understanding of the relationship between the measured effective permittivity (dielectric constant) and the soil water content. Mounting evidence indicates that consideration must be given not only to the volume fractions of soil constituents, as most mixing models assume, but also to soil attributes and ambient temperature in order to reduce errors in interpreting measured effective permittivities. The major objective of the present research project was to investigate the effects of the soil geometrical attributes and interfacial processes (bound water) on the effective permittivity of the soil, and to develop a theoretical frame for improved, soil-specific effective permittivity- water content calibration curves, which are based on easily attainable soil properties. After initializing the experimental investigation of the effective permittivity - water content relationship, we realized that the first step for water content determination by the Time Domain Reflectometry (TDR) method, namely, the TDR measurement of the soil effective permittivity still requires standardization and improvement, and we also made more efforts than originally planned towards this objective. The findings of the BARD project, related to these two consequential steps involved in TDR measurement of the soil water content, are expected to improve the accuracy of soil water content determination by existing in-situ and remote sensing dielectric methods and to help evaluate new water content sensors based on soil electrical properties. A more precise water content determination is expected to result in reduced irrigation levels, a matter which is beneficial first to American and Israeli farmers, and also to hydrologists and environmentalists dealing with production and assessment of contamination hazards of this progressively more precious natural resource. The improved understanding of the way the soil geometrical attributes affect its effective permittivity is expected to contribute to our understanding and predicting capability of other, related soil transport properties such as electrical and thermal conductivity, and diffusion coefficients of solutes and gas molecules. In addition, to the originally planned research activities we also investigated other related problems and made many contributions of short and longer terms benefits. These efforts include: Developing a method and a special TDR probe for using TDR systems to determine also the soil's matric potential; Developing a methodology for utilizing the thermodielectric effect, namely, the variation of the soil's effective permittivity with temperature, to evaluate its specific surface area; Developing a simple method for characterizing particle shape by measuring the repose angle of a granular material avalanching in water; Measurements and characterization of the pore scale, saturation degree - dependent anisotropy factor for electrical and hydraulic conductivities; Studying the dielectric properties of cereal grains towards improved determination of their water content. A reliable evaluation of the soil textural attributes (e.g. the specific surface area mentioned above) and its water content is essential for intensive irrigation and fertilization processes and within extensive precision agriculture management. The findings of the present research project are expected to improve the determination of cereal grain water content by on-line dielectric methods. A precise evaluation of grain water content is essential for pricing and evaluation of drying-before-storage requirements, issues involving energy savings and commercial aspects of major economic importance to the American agriculture. The results and methodologies developed within the above mentioned side studies are expected to be beneficial to also other industrial and environmental practices requiring the water content determination and characterization of granular materials.
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Granot, David, Richard Amasino, and Avner Silber. Mutual effects of hexose phosphorylation enzymes and phosphorous on plant development. United States Department of Agriculture, January 2006. http://dx.doi.org/10.32747/2006.7587223.bard.
Full textAbstract:
Research objectives 1) Analyze the combined effects of hexose phosphorylation and P level in tomato and Arabidopsis plants 2) Analyze the combined effects of hexose phosphorylation and P level in pho1 and pho2 Arabidopsis mutants 3) Clone and analyze the PHO2 gene 4) Select Arabidopsis mutants resistant to high and low P 5) Analyze the Arabidopsis mutants and clone the corresponding genes 6) Survey wild tomato species for growth characteristics at various P levels Background to the topic Hexose phosphorylating enzymes, the first enzymes of sugar metabolism, regulate key processes in plants such as photosynthesis, growth, senescence and vascular transport. We have previously discovered that hexose phosphorylating enzymes might regulate these processes as a function of phosphorous (P) concentration, and might accelerate acquisition of P, one of the most limiting nutrients in the soil. These discoveries have opened new avenues to gain fundamental knowledge about the relationship between P, sugar phosphorylation and plant development. Since both hexose phosphorylating enzymes and P levels affect plant development, their interaction is of major importance for agriculture. Due to the acceleration of senescence caused by the combined effects of hexose phosphorylation and P concentration, traits affecting P uptake may have been lost in the course of cultivation in which fertilization with relatively high P (30 mg/L) are commonly used. We therefore intended to survey wild tomato species for high P-acquisition at low P soil levels. Genetic resources with high P-acquisition will serve not only to generate a segregating population to map the trait and clone the gene, but will also provide a means to follow the trait in classical breeding programs. This approach could potentially be applicable for other crops as well. Major conclusions, solutions, achievements Our results confirm the mutual effect of hexose phosphorylating enzymes and P level on plant development. Two major aspects of this mutual effect arose. One is related to P toxicity in which HXK seems to play a major role, and the second is related to the effect of HXK on P concentration in the plant. Using tomato plants we demonstrated that high HXK activity increased leaf P concentration, and induced P toxicity when leaf P concentration increases above a certain high level. These results further support our prediction that the desired trait of high-P acquisition might have been lost in the course of cultivation and might exist in wild species. Indeed, in a survey of wild species we identified tomato species that acquired P and performed better at low P (in the irrigation water) compared to the cultivated Lycopersicon esculentum species. The connection between hexose phosphorylation and P toxicity has also been shown with the P sensitive species VerticordiaplumosaL . in which P toxicity is manifested by accelerated senescence (Silber et al., 2003). In a previous work we uncovered the phenomenon of sugar induced cell death (SICD) in yeast cells. Subsequently we showed that SICD is dependent on the rate of hexose phosphorylation as determined by Arabidopsis thaliana hexokinase. In this study we have shown that hexokinase dependent SICD has many characteristics of programmed cell death (PCD) (Granot et al., 2003). High hexokinase activity accelerates senescence (a PCD process) of tomato plants, which is further enhanced by high P. Hence, hexokinase mediated PCD might be a general phenomena. Botrytis cinerea is a non-specific, necrotrophic pathogen that attacks many plant species, including tomato. Senescing leaves are particularly susceptible to B. cinerea infection and delaying leaf senescence might reduce this susceptibility. It has been suggested that B. cinerea’s mode of action may be based on induction of precocious senescence. Using tomato plants developed in the course of the preceding BARD grant (IS 2894-97) and characterized throughout this research (Swartzberg et al., 2006), we have shown that B. cinerea indeed induces senescence and is inhibited by autoregulated production of cytokinin (Swartzberg et al., submitted). To further determine how hexokinase mediates sugar effects we have analyzed tomato plants that express Arabidopsis HXK1 (AtHXK1) grown at different P levels in the irrigation water. We found that Arabidopsis hexokinase mediates sugar signalling in tomato plants independently of hexose phosphate (Kandel-Kfir et al., submitted). To study which hexokinase is involved in sugar sensing we searched and identified two additional HXK genes in tomato plants (Kandel-Kfir et al., 2006). Tomato plants have two different hexose phosphorylating enzymes; hexokinases (HXKs) that can phosphorylate either glucose or fructose, and fructokinases (FRKs) that specifically phosphorylate fructose. To complete the search for genes encoding hexose phosphorylating enzymes we identified a forth fructokinase gene (FRK) (German et al., 2004). The intracellular localization of the four tomato HXK and four FRK enzymes has been determined using GFP fusion analysis in tobacco protoplasts (Kandel-Kfir et al., 2006; Hilla-Weissler et al., 2006). One of the HXK isozymes and one of the FRK isozymes are located within plastids. The other three HXK isozymes are associated with the mitochondria while the other three FRK isozymes are dispersed in the cytosol. We concluded that HXK and FRK are spatially separated in plant cytoplasm and accordingly might play different metabolic and perhaps signalling roles. We have started to analyze the role of the various HXK and FRK genes in plant development. So far we found that LeFRK2 is required for xylem development (German et al., 2003). Irrigation with different P levels had no effect on the phenotype of LeFRK2 antisense plants. In the course of this research we developed a rapid method for the analysis of zygosity in transgenic plants (German et al., 2003).