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排序方式: 共有480条查询结果,搜索用时 9 毫秒
191.
Jonathan Di John 《发展研究杂志》2013,49(6):961-986
This paper addresses one of the empirical claims of the ‘resource curse’ argument, namely that oil abundance raises the probability of political violence. I argue that the two main theoretical premises of the oil-civil-war link, rent-seeking and the rentier state model, fail to provide a convincing argument as to why oil economies are more vulnerable to the onset of civil war. I find that three often-mentioned mechanisms as to why oil economies succumb to political violence not convincing; that oil economies are poor economic performers; that oil economies generate high corruption; and that oil economies tend to produce authoritarian regimes. I also examine the empirical evidence on the oil-civil-war link and conclude that the results are not robust. I conclude with some policy implications. 相似文献
192.
为掌握安徽省鸽Ⅰ型副黏病毒病的流行特点及其与鸡新城疫各分离株的相互关系,对从安徽省不同鸽场鸽病料中分离的4株病毒(AH-2012、AH-2012-1、AH-2012-2、AH-2012-3),采用RT-PCR、血清学试验及基因序列测定等方法进行鉴定。结果显示,这些分离株均具有血凝性,并能使NDV标准阳性血清特异性抑制;PCR扩增出F基因特异性目的片段,其核苷酸序列与GenBank上登录的鸽Ⅰ型副黏病毒的同源性较高,相似性达94.8%;与传统的鸡源新城疫病毒标准株LaSota、F48E9的同源性较低,相似性约为80%;F基因编码蛋白的第112~117位氨基酸序列为R-R-Q-K-R-F。结果表明,这些毒株为鸽Ⅰ型副黏病毒,属于基因Ⅵ型。 相似文献
193.
Roberto Catanesi M.D. Vito Martino M.D. Chiara Candelli M.D. Ph.D. Giuseppe Troccoli M.D. Ignazio Grattagliano Psy.D. Giancarlo Di Vella M.D. Ph.D. Felice Carabellese M.D. 《Journal of forensic sciences》2013,58(5):1388-1392
The aim of this study is to identify protective and risk factors related to the development of posttraumatic stress disorder (PTSD) on a sample of survivors from a single plane crash. Eighteen survivors were examined 6 months following the event. The subjects all underwent psychiatric interviews, Clinician‐Administered PTSD Scale structured interviews, personality and cognitive tests. Only 38.9% of them presented with all of the symptoms of PTSD; 22.2% showed no symptoms for PTSD; remaining survivors exhibited emotional/affective symptoms related to the event. In addition to the severity of the traumatic event itself, other risk factors identified were the loss of a relative, the manifestation of depressive symptoms, and the severity of physical injuries sustained. Low levels of hostility and high levels of self‐efficacy represented protective factors against developing PTSD. 相似文献
194.
Claudio Terranova M.D. Marianna Tucci Ph.D. Daniela Sartore M.D. Fabiano Cavarzeran M.Sc. Laura Di Pietra M.D. Luisa Barzon A.P. Giorgio Palù F.P. Santo D. Ferrara F.P. 《Journal of forensic sciences》2013,58(5):1227-1232
The aim of this study was to analyze the connection between alcohol dependence and criminal behavior by an integrated genetic–environmental approach. The research, structured as a case–control study, examined 186 alcohol‐dependent males; group 1 (N = 47 convicted subjects) was compared with group 2 (N = 139 no previous criminal records). Genetic results were innovative, highlighting differences in genotype distribution (p = 0.0067) in group 1 for single‐nucleotide polymorphism rs 3780428, located in the intronic region of subunit 2 of the GABA B receptor gene (GABBR2). Some environmental factors (e.g., grade repetition) were associated with criminal behavior; others (e.g., attendance at Alcoholics Anonymous) were inversely related to convictions. The concomitant presence of the genetic and environmental factors found to be associated with the condition of alcohol‐dependent inmate showed a 4‐fold increase in the risk of antisocial behavior. The results need to be replicated on a larger population to develop new preventive and therapeutic proposals. 相似文献
195.
Kathryn Rudie Harrigan Maria Chiara Di Guardo Bo Cowgill 《The Journal of Technology Transfer》2017,42(5):1212-1233
Technological innovations enjoy synergies that vary in their speed and magnitude of impact, depending upon whether they are additive or multiplicative in nature. Additive-innovation synergies build incrementally on familiar technologies (as is reflected in the technologies built upon within their patents’ respective antecedents) and the duration of their effect is shorter-lived. Multiplicative-innovation synergies arise from combining greater proportions of diverse technologies and their effects have longer duration. The most-effective organizational-learning processes accompanying exposure to exotic technology streams via technological acquisition will occur if firms have properly invested in adaptive capacity to synthesize inventions using the unfamiliar knowledge. In the first tests of innovation synergies on firm performance, we find that technological novelty in patent content improves return on assets for firms that consistently invested in R&D. Using patent-content scores to characterize whether inventors have integrated greater proportions of exotic technological antecedents into their inventions (or not), we test the impact of innovation synergies on firms’ performance after technological acquisitions. Diversification posture (which could be an alternative explanation for performance differences) is negatively-correlated with innovation synergies in our results. 相似文献
196.
197.
Craniofacial identification by comparison of antemortem and postmortem radiographs: two case reports dealing with burnt bodies 总被引:1,自引:0,他引:1
Campobasso CP Dell'Erba AS Belviso M Di Vella G 《The American journal of forensic medicine and pathology》2007,28(2):182-186
Two cases of positive identification of burnt bodies by radiographic comparison are reported. They emphasize that antemortem radiographs of the head are an important but sometimes overlooked source of information which can frequently provide useful objective data for comparison purposes. A positive identification can easily be achieved by medical examiners through visual comparison of the antemortem with the postmortem cranial and facial structures, even of bodies severely damaged by fire. In these bodies the radiographs of the skull can graphically depict structures which are often unique to the individual, such as the frontal sinus pattern and the morphology of dental restorations. However, the process of identification through radiographs is appropriate only in burnt bodies in which antemortem radiographs of the alleged deceased are available for comparison and unique craniofacial structures are still present on the body in a well-preserved state or at least not completely destroyed by fire, depending on the extent of the burn injury. Matching of corresponding features seems preferable to other methods of personal identification such as skull-photo superimposition, morphometric analysis, and/or other computer-aided methods since these techniques need trained personnel, as well as expensive equipment which is not invariably available in the medical examiner's office or department of anthropology. 相似文献
198.
Montesino M Salas A Crespillo M Albarrán C Alonso A Alvarez-Iglesias V Cano JA Carvalho M Corach D Cruz C Di Lonardo A Espinheira R Farfán MJ Filippini S García-Hirschfeld J Hernández A Lima G López-Cubría CM López-Soto M Pagano S Paredes M Pinheiro MF Rodríguez-Monge AM Sala A Sóñora S Sumita DR Vide MC Whittle MR Zurita A Prieto L 《Forensic science international》2007,168(1):42-56
The mitochondrial DNA (mtDNA) working group of the GEP-ISFG (Spanish and Portuguese Group of the International Society for Forensic Genetics) carried out an inter-laboratory exercise consisting of the analysis of mtDNA sequencing patterns in mixed stains (saliva/semen and blood/semen). Mixtures were prepared with saliva or blood from a female donor and three different semen dilutions (pure, 1:10 and 1:20) in order to simulate forensic casework. All labs extracted the DNA by preferential lysis and amplified and sequenced the first mtDNA hypervariable region (HVS-I). Autosomal and Y-STR markers were also analysed in order to compare nuclear and mitochondrial results from the same DNA extracts. A mixed stain prepared using semen from a vasectomized individual was also analysed. The results were reasonably consistent among labs for the first fractions but not for the second ones, for which some laboratories reported contamination problems. In the first fractions, both the female and male haplotypes were generally detected in those samples prepared with undiluted semen. In contrast, most of the mixtures prepared with diluted semen only yielded the female haplotype, suggesting that the mtDNA copy number per cell is smaller in semen than in saliva or blood. Although the detection level of the male component decreased in accordance with the degree of semen dilution, it was found that the loss of signal was not consistently uniform throughout each electropherogram. Moreover, differences between mixtures prepared from different donors and different body fluids were also observed. We conclude that the particular characteristics of each mixed stain can deeply influence the interpretation of the mtDNA evidence in forensic mixtures (leading in some cases to false exclusions). In this sense, the implementation of preliminary tests with the aim of identifying the fluids involved in the mixture is an essential tool. In addition, in order to prevent incorrect conclusions in the interpretation of electropherograms we strongly recommend: (i) the use of additional sequencing primers to confirm the sequencing results and (ii) interpreting the results to the light of the phylogenetic perspective. 相似文献
199.
目的对汽车方向盘及变速杆把手上的皮肤脱落细胞进行STR检验研究。方法用EZ-tape采集车辆方向盘及变速杆上的脱落细胞,Chelex-100法与磁珠法结合提取DNA,延长保温时间。定量后调整PCR反应体系,适当增加PCR循环数,增加PCR产物量及延长进样时间进行电泳检测,使用GeneMapperIDV3.2软件进行STR分型。同时,对比使用多重置换扩增技术对提取的DNA进行全基因组扩增。结果对33份车辆方向盘和变速杆上脱落细胞的检测,其中19份检出全部基因座的基因分型结果,9份检出部分基因型,5份未检出DNA分型结果。而利用多重置换扩增技术未获得满意图谱。结论本研究建立的脱落细胞收集、DNA提取、PCR扩增及检测方法适合于车辆上脱落细胞的检验,其结果优于使用多重置换扩增技术获得的分型。 相似文献
200.
Francesco Lupariello M.D. Serena Maria Curti M.D. Elena Coppo M.D. Sara Simona Racalbuto Psy.D. Giancarlo Di Vella M.D. Ph.D. 《Journal of forensic sciences》2019,64(2):638-642
The “Blue Whale Challenge” is a dangerous Internet phenomenon. As per media reports, it involves a series of life‐threatening tasks imposed by a “curator” to “players,” who must fulfill the whole list, and it ends with the suicide of the player. The authors report the data of five suspected cases of “Blue Whales” managed from January 2016 to December 2017 by the staff of a unit (the “Bambi Unit” of the Pediatric Hospital “Regina Margherita” of Turin, Italy) that is dedicated to the evaluation of suspected abused children. Then, they analyzed this data in the light of the literature regarding self‐harm. This comparison highlights the role of the Internet in the spreading of self‐harm behavior among vulnerable adolescents who are characterized by epidemiological, psychological, psychiatric, social, and cultural risk factors. In conclusion, the authors suggest a multidisciplinary and specialized approach in the evaluation of adolescents who committed self‐harm activities. 相似文献