Different approaches to Kovalevskaya top

In this paper we study the equations of motion of a rigid body around a fixed point in the case of Kovalevskaya. We give interpretation of the 'mysterious substitution of variables' in Sofia Kovalevskaya's paper. The present paper also connects integration procedure proposed by Golubov with the original equations obtained by S. Kovalevskaya

Regional development under socialism: evidence from Yugoslavia

This paper analyses the patterns of regional growth and development in Yugoslavia, under the most decentralised socialist system that ever existed. My analysis reveals that despite government efforts to the contrary, socialist economic development in Yugoslavia resulted in divergence rather than in convergence between the constituent regions. I find that regional income divergence was caused by the failure of the less developed regions to converge towards the employment rates and total factor productivities of the more developed regions. I interpret these failures as symptoms of a single underlying problem: a capital intensity bias inherent to the governing objective of labour-managed firms. Socialist Yugoslavia moved from having one central plan, to having many mutually competitive plans. While on aggregate this may have created a net positive productivity outcome compared to other socialist economies, it created unique distortions. The decentralisation policies were implemented with the aim of enhancing regional cohesion and social stability. They led, however, to exactly opposite outcome

Have Hand Gestures Become Globalized?

This research paper aims to examine whether emblematic gestures have become globalized. This hypothesis was based on everyday experience of globalization processes that have shrunk the world and brought closer people of different cultures, religions and languages. In order to test this hypothesis, questionnaires consisting of fifteen emblematic gestures were given to seventy participants coming from different parts of the world. The results show that members of cultures more similar to the American one (e.g. Australian participants) tend to interpret emblems more similarly to Americanized conventions. On the other hand, members of more conservative cultures (e.g. the Turkish participants) tend to interpret gestures like ‘the OK sign’ more readily according to their own local traditions, which is compatible to some degree to the previous research on emblems. The absence of complete non-understanding and an insignificant percentage of a low level of understanding imply that the chosen emblems are already used world widely. Finally, interpretations of those emblems whose usage is restricted to just one culture (or country) have shown how American popular culture has also successfully promoted distant cultures and their recognizable features (e.g. the case of a Chinese emblem used by martial art practitioners)

The last Yugoslavs: Ethnic diversity and national identity

Nation-building is often proposed as a device for integration in ethnically divided societies. The determinants of national sentiment, however, remain imperfectly understood. This paper analyses the role of interethnic contact in the process of nation formation within multiethnic Yugoslavia, just before its disintegration in 1991. Using a variety of data sources and empirical strategies, I find that interethnic contact stimulated the formation of the Yugoslav nation. I argue that ethnic intermarriage is the key mechanism through which ethnic diversity influenced the adoption of a shared Yugoslav identity. These results illustrate the powerful effect that interethnic contact can have in reducing ethnic division even in a tense ethnic environment on the verge of conflict, like that of Yugoslavia

Effects of Training and a Semester Break on Physical Fitness of Police Trainees

The purpose of this research was to investigate the effects of a physical training program and semester break periods on the chosen physical abilities and basic body composition indicators among police trainees. Body weight (BW), waist circumference (WC), push-ups (PU), sit-ups (SU) and 2.4 km run (RUN) times of 420 male trainees attending the Abu Dhabi Police College were collected. The testing was conducted by the police education centre during routine testing periods (June, September, December, May) which bracketed the semesters and could be used to investigate the impacts of the physical training program and any potential detraining occurring over the semester break. A repeated measure analysis of variance was performed to identify changes in results across the time periods with a Bonferroni post-hoc adjustment to identify where differences, if any, lay. The level of significance was set at 0.05 a priori. Following the semester break period from June to September, BW, WC and RUN increased significantly (p<.01), while PU and SU decreased significantly (p<.01). WC and RUN significantly decreased from September to December and December to May (p<.01); BW significantly decreased from September to December (p<.01), but did not change from December to May (p=.267); PU and SU significantly increased from September to December (p<.01) and December to May (p=.018 and p<.01, respectively)

Associations between Fitness Measures and Change of Direction Speeds with and without Occupational Loads in Female Police Officers

Female police officers may be required to pursue offenders on foot while wearing occupational loads. The aim of this study was to determine relationships between fitness measures and change of direction speed (CODS) in female police officers and the influence of their occupational loads. Retrospective data were provided for 27 female police officers (age = 32.19 ± 5.09 y, height = 162.78 ± 5.01 cm, and mass = 71.31 ± 13.42 kg) and included fitness measures of: lower-body power (standing long jump (SLJ)), upper-body and trunk muscle endurance (push-up (PU) and sit-up (SU)), aerobic power (estimated VO2max), and CODS (Illinois agility test). The CODS test was performed without and with occupational load (10 kg). Paired sample t-tests (between-load conditions) and Pearson's correlations (relationships between measures) were performed with linear regression analysis used to account for the contribution of measures to unloaded and loaded CODS performance. CODS was significantly slower when loaded (unloaded = ~23.17 s, loaded = ~24.14 s, p < 0.001) with a strong, significant relationship between load conditions (r = 0.956, p < 0.001). Moderate to strong, significant relationships were found between all fitness measures ranging from estimated VO2max (r = -0.448) to SU (r = -0.673) in the unloaded condition, with the strength of these relationships increasing in the loaded condition accounting for 61% to 67% of the variance, respectively. While unloaded agility test performance was strongly associated with loaded performance, female police officer CODS was significantly reduced when carrying occupational loads. A variety of fitness measures that influence officer CODS performances become increasingly important when occupational loads are carried

Endoscopic treatment of mediastinal pancreatic pseudocyst using lumen apposing metal stents - Case report

Mediastinal pancreatic pseudocyst (PP) is a rare complication of acute alcoholic pancreatitis. Endoscopic drainage has become widely used in the management of PPs and novel lumen apposing metal stents (LAMS) could provide more effective treatmen