Occupation, Race, Unemployment and Crime In a Dynamic System

Inthis paper, the relationship between unemployment and property crime is investigated in the context of dynamic system by using quarterly time series data for the United States during the period of 1973 (I) —1981(IV). The results of Granger's causality tests indicate that unemployment by occupation (white and blue collars) is significantly associated with robbery, which is the most serious property crime. Unemployment by race (white, black, and Hispanic) also supports the above finding. In general, the linkage between unemployment rate and property crime seems to become stronger as the degree of seriousness of crime increases.The findings of the dynamic system show that blue collar, Hispanic, and black unemployment rates have persistently positive effects on robbery.Therefore, these above findings suggest that any attempt to reduce property crime through alleviation of unemployment would most efficiently be directed towards specific categories of the labor force.

Local Residents’ Preferences for Second Home Tourism Development Policies: A Choice Experiment nalysis

This paper is concerned with the preferences of the rural residents living in areas subject to rapid second home tourism development in Iran. Since second home development could have positive and negative social, cultural, economical and environmental impacts for local residents, planning policies should take into consideration public opinions and preferences for future planning and developments. Using a choice experiment method, we attempt to estimate the values that the rural households in Tehran province would place on different impacts of second home development policies.second home, tourism, choice experiment method, Tehran

Traumatic Arteriovenous Fistula After Kickboxing Injury: A Case Report and Review of the Literature

Introduction:: A traumatic arteriovenous fistula (AVF) after repetitive blunt trauma has not been described previously. In a 34-year-old male, the first reported case of such an injury after repetitive blunt trauma is described. Case Presentation:: A 34-year-old gentleman presented with a non-healing ulcer near his medial malleolus. A bone scan was performed and then treated for presumed osteomyelitis. An arteriogram confirmed an AVF, and coil embolization was performed with complete occlusion of the AVF. Subsequently, the ulcer healed rapidly with no complication. Along with the cause of AVF, this case is notable for symptom presentation. Conclusions:: Arteriovenous fistula after blunt trauma can present as a non-healing venous stasis ulcer, which could be treated non-invasively

Cooperative Multi-Bitrate Video Caching and Transcoding in Multicarrier NOMA-Assisted Heterogeneous Virtualized MEC Networks

Cooperative video caching and transcoding in mobile edge computing (MEC) networks is a new paradigm for future wireless networks, e.g., 5G and 5G beyond, to reduce scarce and expensive backhaul resource usage by prefetching video files within radio access networks (RANs). Integration of this technique with other advent technologies, such as wireless network virtualization and multicarrier non-orthogonal multiple access (MC-NOMA), provides more flexible video delivery opportunities, which leads to enhancements both for the network's revenue and for the end-users' service experience. In this regard, we propose a two-phase RAF for a parallel cooperative joint multi-bitrate video caching and transcoding in heterogeneous virtualized MEC networks. In the cache placement phase, we propose novel proactive delivery-aware cache placement strategies (DACPSs) by jointly allocating physical and radio resources based on network stochastic information to exploit flexible delivery opportunities. Then, for the delivery phase, we propose a delivery policy based on the user requests and network channel conditions. The optimization problems corresponding to both phases aim to maximize the total revenue of network slices, i.e., virtual networks. Both problems are non-convex and suffer from high-computational complexities. For each phase, we show how the problem can be solved efficiently. We also propose a low-complexity RAF in which the complexity of the delivery algorithm is significantly reduced. A Delivery-aware cache refreshment strategy (DACRS) in the delivery phase is also proposed to tackle the dynamically changes of network stochastic information. Extensive numerical assessments demonstrate a performance improvement of up to 30% for our proposed DACPSs and DACRS over traditional approaches.Comment: 53 pages, 24 figure