Two-queue polling systems with switching policy based on the queue that is not being served

We study a system of two non-identical and separate M/M/1/? queues with capacities (buffers) C₁ < ∞ and C₂ = ∞, respectively, served by a single server that alternates between the queues. The server’s switching policy is threshold-based, and, in contrast to other threshold models, is determined by the state of the queue that is not being served. That is, when neither queue is empty while the server attends Q_i (i = 1, 2), the server switches to the other queue as soon as the latter reaches its threshold. When a served queue becomes empty we consider two switching scenarios: (i) Work-Conserving, and (ii) Non-Work-Conserving. We analyze the two scenarios using Matrix Geometric methods and obtain explicitly the rate matrix R, where its entries are given in terms of the roots of the determinants of two underlying matrices. Numerical examples are presented and extreme cases are investigated.     

When ERM Met Alma: The Intricacies of Content Management in a Shared Consortia Landscape

ABSTRACT

In 2013, after nearly two decades of operating in a distributed legacy Integrated Library System (ILS) environment on local servers, the Orbis Cascade Alliance, a consortium of public and private academic libraries in Washington, Oregon, and Idaho, began a two-year-long process to migrate its 37 members to a shared implementation of Ex Libris's cloud-based Alma library management system (LMS) and Primo discovery interface. Although much has been written on electronic resource management (ERM) functionality at an institution level, little has been written on serials and ERM functionality and workflows within a shared consortial environment. This article discusses the challenges and opportunities of implementing a consortial-based LMS, with particular emphasis on serials and ERM functionality. Key migration issues related to serials control, acquisitions, licensing, administration, cataloging, statistics, and interoperability are examined at the institutional and large-scale networked levels. Benefits and limitations of using a shared consortial cloud-based LMS are explored, and the overall capabilities of the Alma LMS for electronic resource management are reviewed.     

Seemingly unrelated systems of econometric equations

A generalization of Zellner's SUR model is derived for sets of seemingly unrelated systems of econometric equations. The resulting structural form – worked out for a set of Cowles Commission-type simultaneous equations systems – is general enough to include any SUR-type or panel-type specification of systems of econometric equations with contemporaneously correlated errors. Maximum estimation efficiency is obtained by treating all the individual subsystems at once rather than in a subsystem-by-subsystem fashion.     

Progressively Type-II censored conditionally N-ordered statistics from a unified elliptically contoured copula

Progressively Type-II censored conditionally N-ordered statistics (PCCOS-N) arising from iid random vectors X_i = (X¹_i, X²_i, …, X_i^p), i = 1, 2…, n, were investigated by Bairamov (2006 Bairamov, I. (2006). Progressive Type II censored order statistics for multivariate observations. J. Mult. Anal. 97:797–809.[Crossref], [Web of Science ®] , [Google Scholar]), with respect to the magnitudes of N(X_i), i = 1, 2, …, n, where N( · ) is a p-variate measurable function defined on the support set of X₁ satisfying certain regularity conditions and N(X_i) denotes the lifetime of the random vector X_i, i = 1, …, n. Under the PCCOS-N sampling scheme, n independent units are placed on a life-test and after the ith failure, R_i (i = 1, …, m) of the surviving units are removed at random from the remaining observations. In this article, we consider PCCOS-N arising from a vector with identical as well as non identical dependent components, jointly distributed according to a unified elliptically contoured copula (PCCOSDUECC-N). Results established here contain the previous results as particular cases. Illustrative examples and simulation studies show that PCCOSDUECC-N enables us to analyze the lifetime of several systems, including repairable systems and systems with standby components, more efficiently than PCCOS-N.     

创新理念 推进自治制度运行和自治地方治理现代化

Deepening reform, promoting the rule of law, and implementing the “Five Develop￣ment ” concepts have had a deep influence on the modernization of governance in ethnic autonomous regions. Based on a review of 30 years of success￣ful experiences in implementing ethnic regional au￣tonomous law, and focusing on the concepts of“innovation, coordination, green development, openness and sharing”, we need to conduct in -depth research on the ways to:promote governance by law, realize the modernization of governance;and promote the efficient implementation of ethnic autonomous systems in the ethnic autonomous re￣gion.
The 155 ethnic autonomous areas of China cover 64% of the total area of the country. There￣fore, the governance of the country cannot be a￣chieved without modernizing the governance in the ethnic autonomous regions. Modernizing the gov￣ernance in ethnic autonomous regions is a necessa￣ry element for modernizing the governance of the nation. The modernization of the ethnic autono￣mous regions actually means the legalization of the governance in ethnic autonomous areas, which is a main part of the legalization of the ethnic affairs.
The comprehensive, deepening of reform, and promoting governance by law have been strongly promoted. We should start from reality, respect differences, and take the development concepts of“innovation, coordination, green, openness and sharing” into consideration so as to promote the ef￣ficient implementation of ethnic regional autono￣mous systems through various methods. We should update our concepts, weaken specificity, solidify locality, intensify new thinking, innovate the run￣ning of ethnic autonomous systems, and promote the modernization of governance in ethnic autono￣mous regions. Based on a comprehensive analysis of the theories and practices used since the imple￣mentation of ethnic regional autonomous regula￣tions, and under the premise of intensifying “the legalization of ethnic affairs”, we should deepen the comprehensive reform of the ethnic autonomous regions, comprehensively promote the governance by law, and realize the goal of building a moder￣ately prosperous society as scheduled through im￣proving and innovating the running of ethnic re￣gional autonomous systems.
“Ethnic areas are districts with rich resources and water sources; they are ecological screen zones, cultural characteristic zones, border areas, and poor areas.” At the same time, due to histori￣cal, social and natural factors,“the natural condi￣tions of most ethnic areas are not good; their be￣ginning phase of development is low; they have many historical debts; they are located far away from the central markets and urban areas;their ur￣ban-rural gap is very obvious”, and “their gap with the eastern areas ( of China) is growing larger and larger”. The reform and the promotion of gov￣ernance by law in ethnic autonomous areas should put more emphasis on locality, ethnicity and “au￣tonomy”. Of course, we must avoid of “artificial￣ly” intensifying ethnic consciousness, and creating ethnic “differences”. Meanwhile, we should “im￣prove the capability for legal management of ethnic affairs”, “intensify the construction of laws and regulations related to ethnic work”, “legally han￣dle those issues involving ethnic factors”, “insist on resolving issues involving ethnic factors by the law, and avoid of regarding civil and criminal problems related to ethnic people as ethnic prob￣lems, or regarding common disputes in ethnic are￣as as ethnic problems. ”
We should affirm that China’s ethnic relations are harmonious, and that their economics are de￣veloping rapidly. Since the implementation of the policy of “reform and opening -up”, especially since 2005 , the economics in ethnic autonomous regions have developed dramatically; the people’s living conditions have continuously improved;bas￣ic infrastructure has significantly speeded up; and ecological protection has solidly improved. Howev￣er, the problems still prevail. For example, the poverty in ethnic areas is still serious—there are more than 25 million poor in ethnic rural areas. Therefore, the task of poverty alleviation is still very tough. In addition, the gap between urban and rural areas and between different regions is very large in ethnic autonomous regions. Finally, the rate of urbanization is very low.
In sum, during the process of modernizing so￣cial governance in ethnic autonomous regions, we must pay full attention to the five“stage character￣istics” of ethnic work in China which are the:( i) co - existence of opportunities and challenges brought by the “reform and opening -up” policy and the socialist market economy;( ii) co-exist￣ence of the state’s constant support to the ethnic ar￣eas and its low level of development; ( iii ) co -existence of the state’s constant support to the eth￣nic areas and the weak level of basic public service capability in ethnic areas; ( iv ) co -existence of the constant exchange and fusion between various ethnic groups and the disputes involving ethnic fac￣tors;and ( v) co-existence of the great achieve￣ments in anti-national splittism, religious extrem￣ity, and violent terrorism, as well as the active ter￣rorism activities in some areas. Only when we rec￣ognize this situation, can we understand the speci￣ficity of doing ethnic work in China. The innova￣tion of governance of ethnic autonomous areas and the promotion of governance by law in the whole country must start from this actual situation.
At present, we still need to clarify the conno￣tations of autonomous rights. Based on a clear clar￣ification of the basic meaning of ethnic regional au￣tonomous rights, we should deepen reform, active￣ly transform the governance of the ethnic autono￣mous regions, further deepen relevant theoretical studies, and positively promote the ethnic regional autonomous system. The main purpose of the eth￣nic regional autonomous areas is to promote the de￣velopment of the various affairs of ethnic minorities and ethnic regional autonomous areas. The purpose for improving the ethnic regional autonomous sys￣tem is to ensure the development of ethnic minori￣ties and ethnic regional autonomous regions. Im￣proving the ethnic regional autonomous system should transform from one of preferential treatment to one of nuanced development.
Looking back to the past, the legal construc￣tion of ethnic regional autonomy has made great a￣chievements. However, the preferential policies of the state and relevant institutes are still the real factors promoting the development of the various af￣fairs of the ethnic minorities and ethnic autonomous areas. As described in this article, there are multi￣ple factors which influence the efficiency and per￣formance of the ethnic regional autonomy. The eth￣nic autonomous regions are restricted by natural conditions and economic development, therefore, they have to depend on assistance from the state and the relevant institutes—this is the objective re￣ality. However, the improvement of the ethnic re￣gional autonomous system must change the status of the past, and enable the ethnic regional autono￣mous system play out its actual role so that the va￣rious affairs of ethnic minorities and ethnic autono￣mous regions can step onto a road of nuanced de￣velopment.
The future development of the ethnic regional autonomous system depends on the consensus of theoretical and practical circles, i. e. a long-term mechanism whose purpose is to enable the system itself play its actual role should be established. Only by such a mechanism, can these puzzling problems be solved and gradually improved. Tak￣ing the breakthrough of the actual effect of the sys￣tem as the starting point of the ethnic regional autonomy’s deepening of the reform, one should take the following aspects into consideration:1 ) re-examine existing laws and regulations, and im￣prove them on the basis of institutional norms, en￣hance normalization, uniformity and manipulability of the ethnic regional autonomous regulations; 2 ) sort out the relationship between the institutions in ethnic autonomous areas and the upper levels of the state institutes, as well as the relationship be￣tween the institutions on the same level;on the va￣rious institutional levels, enhance clear cognition on the position, role and organizing principles of the ethnic regional autonomous system, and avoid taking the ethnic regional autonomous system as the affairs of the ethnic autonomous areas;3 ) im￣prove the supervisory mechanisms for running the ethnic regional autonomous system; and 4 ) im￣prove the mechanisms for handling disputes on the running of the ethnic regional autonomous system.
We must work closely, share the achieve￣ments, and promote the operation of the ethnic re￣gional autonomous system. For this purpose, we should:1 ) standardize the management of the eth￣nic regional autonomous system, and weaken the“specificity”;2 ) promote the governance capabili￣ty of the ethnic regional autonomous areas, and so￣lidify the concept of“locality”;3 ) enhance auton￣omous awareness and capability, intensify “new thinking”, motivate initiatives from the autonomous areas, and improve the autonomous system from the bottom-up, and rationally allocate the power and rights of the high-level organs and the auton￣omous organs in the ethnic autonomous areas.     

Understanding Client Communities Spatially for Developing Effective Interventions: Application of Geographic Information Systems (GIS) Technology for Program Planning in Health and Human Services Agencies

Social workers are better equipped to understand the need to incorporate geographical aspects pertaining to their clients’ lives as part of their practice, given the significant influence these factors have on client well-being. Geographic Information Systems (GIS) technology is a useful tool for administrators and planners to make informed decisions regarding human service programs including examining program outcomes and impact as well as streamlining program implementation. This article synthesizes the literature to date on GIS in health and human services with examples of real world applications.     

A Social Network Comparison of Low‐Income Black and White Newlywed Couples

Relative to White families, Black families have been described as relying on extended social networks to compensate for other social and economic disadvantages. The presence or absence of supportive social networks should be especially relevant to young couples entering marriage, but to date there has been little effort to describe the social networks of comparable Black and White newlyweds. The current study addressed this gap by drawing on interviews with 57 first‐married newlyweds from low‐income communities to compare the composition and structure of Black and White couples' duocentric social networks. The results indicated that low‐income Black couples entered marriage at a social disadvantage relative to White couples, with more family relationships but fewer positive relationships and fewer sources of emotional support (for wives), fewer connections to married individuals, and fewer shared relationships between spouses. Black couples' relative social disadvantages persisted even when various economic and demographic variables were controlled.     

Assessing state substance abuse prevention infrastructure through the lens of CSAP's Strategic Prevention Framework

Although the organizational structures and operating procedures of state substance abuse prevention systems vary substantially across states, there is scant empirical research regarding approaches for rigorous assessment of system attributes and which attributes are most conducive to overall effectiveness. As one component of the national cross-site evaluation of the SPF State Incentive Grant Program (SPF SIG), an instrument was developed to assess state substance abuse prevention system infrastructure in order to measure infrastructure change and examine the role of state infrastructure in achieving prevention-related outcomes. In this paper we describe the development of this instrument and summarize findings from its baseline administration. As expected, states and territories were found to vary substantially with respect seven key characteristics, or domains, of state prevention infrastructure. Across the six domains that were assessed using numeric ratings, states scored highest on data systems and lowest on strategic planning. Positive intercorrelations were observed among these domains, indicating that states with high capacity on one domain generally have relatively high capacity on other domains as well. The findings also suggest that state prevention infrastructure development is linked to both funding from state government and the presence of a state interagency coordinating body with decision-making authority. The methodology and baseline findings presented will be used to inform the ongoing national cross-site evaluation of the SPF SIG and may provide useful information to guide further research on state substance abuse prevention infrastructure.     

Trauma and Bowen Family Systems Theory: Working with Adults Who were Abused as Children

Working with survivors of trauma is mostly challenging, exhausting, long‐term and often ‘messy’, when interventions that ‘should’ work, don't, or the unexpected arises. Nevertheless, explanations that speak to recovery from trauma more and more rely on neurobiological concepts to account for any positive change. Combining the family systems approach of Murray Bowen and recent research on the brain and trauma, post trauma symptoms are viewed as part of the ‘family emotional process’ even when traumatic events have emanated from outside the family system itself. Variations in responses to trauma, including dissociation and self‐harm are discussed in relation to chronic anxiety and ‘differentiation of self’.