Suchergebnisse

The goal of this project is to support the work of International Justice Mission in Ghana to end child trafficking by developing a compelling curriculum on biblical justice. The Justice Thread is an eight-week Bible study tracing the theme of biblical justice as it unfolds throughout the Bible. The curriculum aims to be a practical and contextually appropriate tool for churches in Ghana, which currently lack resources, training, and emphasis on justice-related ministry. The Justice Thread seeks to introduce participants to the God of justice while also educating them about the injustice of child trafficking in their midst. Ultimately, participants are urged toward action on behalf of the oppressed in their community. This study demonstrates the prominence and prevalence of the theme of justice throughout the various sections of the Bible. It is argued that justice in human affairs is of utmost importance to God and therefore to the Christian mission of the church. The exegetical study introduces concepts related to justice such as shalom, holistic ministry, the purpose of authority, the role of a prophet, and God's particular concern for the vulnerable. The study seeks to inspire greater familiarity with God's heart for justice, increased commitment to the oppressed, and growing courage to stand up to oppressors. Recognizing the importance of contextualization, the study includes cultural exegesis and ministry context analysis drawn from the author's two years of experience in the field and input from Ghanaian scholars and International Justice Mission national staff. The curriculum was field tested with approximately two hundred pastors and church leaders from fishing villages along the shores of Lake Volta, an area with a high prevalence of child trafficking. The curriculum has been well received by churches from many different denominations making plans for implementation.

Stabilization and reconstruction operations are necessary to secure and maintain the peace in the aftermath of conflict. The complexities of nation-building involve many different but interrelated systems and institutions. The basic structure of a country may or may not remain; its political, economic, and judicial systems, cultural, educational, medical, and military institutions, and critical infrastructure all vitally contribute to the overall progression of stability and prosperity. Understanding the significance of the dynamic relationships between the forces in play during stability and reconstruction operations is paramount to the successful conclusion of such missions. The system dynamics model proposed in this research functions as a support tool allowing decision makers and analysts to investigate different sets of decision approaches at a sub-national, regional level. Concentration on the regional level allows for specific identification and investigation of potentially troublesome regions, providing the model-user with more detailed information concerning the internal dynamics prevalent within the area of operations. Construction of two different measures via logistic regression, a probability of stabilization success and a probability of stabilization failure, provide indication as to the successful execution of stabilization and reconstruction operations. The proposed model is a general construct, widely adaptable to a variety of post-conflict nation-building scenarios. The model is notionally demonstrated using Operation Iraqi Freedom as a test case.

How do polycentric governance systems respond to the emergence of new collective‐action problems? We study this question in the context of the evolution of polycentric systems of sea‐level rise adaptation in the San Francisco Bay Area. We focus on how the structure of polycentric systems changes over time to support cooperation and learning and whether those changes represent a process of centralization or decentralization. The ecology of games framework provides the theoretical background for developing hypotheses about the structure of the system over time. We test the hypotheses by analyzing the polycentric system as a two‐mode network where actors are linked to policy, divided into five time periods from 1991 to 2016. The results suggest that the polycentric system for sea‐level rise adaptation started with a centralized set of actors, which evolved over time to a more decentralized structure. The research has general implications with respect to how polycentric systems manage the trade‐off between maintaining local autonomy and coordinating decisions at the regional level across fragmented policy communities.

Military medical planners must develop dispatching policies that dictate how aerial medical evacuation (MEDEVAC) units are utilized during major combat operations. The objective of this research is to determine how to optimally dispatch MEDEVAC units in response to 9-line MEDEVAC requests to maximize MEDEVAC system performance. A discounted, infinite horizon Markov decision process (MDP) model is developed to examine the MEDEVAC dispatching problem. The MDP model allows the dispatching authority to accept, reject, or queue incoming requests based on a request's classification (i.e., zone and precedence level) and the state of the MEDEVAC system. A representative planning scenario based on contingency operations in southern Afghanistan is utilized to investigate the differences between the optimal dispatching policy and three practitioner-friendly myopic policies. Two computational experiments are conducted to examine the impact of selected MEDEVAC problem features on the optimal policy and the system performance measure. Several excursions are examined to identify how the 9-line MEDEVAC request arrival rate and the MEDEVAC flight speeds impact the optimal dispatching policy. Results indicate that dispatching MEDEVAC units considering the precedence level of requests and the locations of busy MEDEVAC units increases the performance of the MEDEVAC system. These results inform the development and implementation of MEDEVAC tactics, techniques, and procedures by military medical planners. Moreover, an analysis of solution approaches for the MEDEVAC dispatching problem reveals that the policy iteration algorithm substantially outperforms the linear programming algorithms executed by CPLEX 12.6 with regard to computational effort. This result supports the claim that policy iteration remains the superlative solution algorithm for exactly solving computationally tractable Markov decision problems.

The United States Army can benefit from effectively utilizing cargo unmanned aerial vehicles (CUAVs) to perform resupply operations in combat environments to reduce the use of manned (ground and aerial) resupply that incurs risk to personnel. We formulate a Markov decision process (MDP) model of an inventory routing problem (IRP) with vehicle loss and direct delivery, which we label the military IRP (MILIRP). The objective of the MILIRP is to determine CUAV dispatching and routing policies for the resupply of geographically dispersed units operating in an austere, combat environment. The large size of the problem instance motivating this research renders dynamic programming algorithms inappropriate, so we utilize approximate dynamic programming (ADP) methods to attain improved policies (relative to a benchmark policy) via an approximate policy iteration algorithmic strategy utilizing least squares temporal differencing for policy evaluation. We examine a representative problem instance motivated by resupply operations experienced by the United States Army in Afghanistan both to demonstrate the applicability of our MDP model and to examine the efficacy of our proposed ADP solution methodology. A designed computational experiment enables the examination of selected problem features and algorithmic features vis-à-vis the quality of solutions attained by our ADP policies. Results indicate that a 4-crew, 8-CUAV unit is able to resupply 57% of the demand from an 800-person organization over a 3-month time horizon when using the ADP policy, a notable improvement over the 18% attained using a benchmark policy. Such results inform the development of procedures governing the design, development, and utilization of CUAV assets for the resupply of dispersed ground combat forces.