3D Reconstruction of Cultural Values at the Regional History Museum-Veliko Tarnovo

The project paper presents the work done by the Regional History Museum – Veliko Tarnovo (RHM) on 3D reconstruction of cultural values and objects from the Veliko Tarnovo region – the St Peter and St Paul church in Veliko Tarnovo, the chorus of the metropolitan Nativity church in Arbanassi and the St. Dimitar church in Arbanassi

« Consommer la mobilité » en Bulgarie postsocialiste (1990-2000) : sujets et objets

Analysing the social connotation of material consumption among the newly rich in Bulgaria, this article examines the dynamics of postsocialist identity. The material object is regarded as a means of expression for the newly rich individual to establish an identity within the new social context. Principal purchases — the house and car—must materialize the individual's success. However, these objects create a contradiction between the modernity of global mobility, and the sense of belonging to a place that stems from the perpetuation of local traditions. It is the family, where the most material investment is made, that must reconcile social mobility with cultural continuity. Résumé Analysant la connotation sociale de la consommation matérielle des nouveaux riches en Bulgarie, cet article vise la dynamique identitaire postsocialiste. L'objet matériel est abordé comme moyen d'expression de l'acteur lors de son interaction avec le nouveau contexte social. Les premiers objets d'investissement - la maison et la voiture - doivent matérialiser la réussite individuelle. Ils expriment cependant une identité contradictoire, oscillant entre la modernité d'une mobilité mondialiste et une appartenance locale gérée par des valeurs traditionnelles. C'est la famille, lieu privilégié d'investissement matériel, qui doit réconcilierla mobilité sociale et l'ancrage culturel

Central planning, market and subsistence from a tundra perspective: Field experience with reindeer herders in the Kola Peninsula

This paper is based on field experience in the tundra camp of a reindeer-herding brigade with mixed ethnic background (Komi, Sami, Nenets, Russians) belonging to the ex-Sovkhoz of Krasnoschelie. Its purpose is to situate the new critical issues facing the reindeer-herding collectives after the economic collapse in Russia in 1998. My main argument is that the increasing economic isolation of the tundra periphery forces the herders to redefine their relationship with both the centre(s) and the other tundra actors. Reindeer herding on the Kola Peninsula is analysed in relation to its heterogeneous economic system defined by the old Sovkhoz-like management and the new Western buyer of reindeer meat. Furthermore, the social environment in the herding territories has changed since the deterioration of the central planning economy, implying new renewable resources' users. After massive loss of jobs, militaries, miners and geologists came into the tundra for substantial hunting and fishing and so became actors in the local informal economy. Finally, tundra-located herders and hunters seem to be somewhere unified by a discourse against the town-based administrative power and economic actors such as mining industry. Therefore herders have to deal with both an old administrative system in the agrocentre and new realities in the tundra. Based on a case study of herding/hunting activities in a tundra camp, the paper analyses the social relationships between the different actors in the post-Soviet Kola tundra and express their quest for solutions

THE EFFECT OF FEED RATE AND CUTTING SPEED TO SURFACE ROUGHNESS DURING HOLE BORING OF ALUMINUM WITH ANTI-VIBRATION BORING BAR

this study is focusing on the experimental investigation of the effects of cutting parameters on surface roughness during hole boring of 8062 aluminums with anti-vibration boring bar on lathe. Several experiments were conducted with different cutting conditions. Based on the results and using “Minitab 19” software, a mathematic model was made to predict the surface quality in connection with different cutting conditions. Finally, an experiment analysis was carried out to verify the analytical results.

3D MODELING, SIMULATION AND ANALYSIS OF ANTI-VIBRATION BORING BAR

This study presents the capabilities of the engineering dynamic analysis according to the Finite Elements Method (FEM), demonstrated on a 3D virtual prototype of a part "Anti-vibration boring bar" for lathe. The analysis is performed with help of CAE system Ansys. The modal frequencies are determined which are necessary for optimizing the constructive parameters of the product during the design stage

Parâmetros hematológicos em cavalos de enduro pré e pós prova de 120 km

The endurance discipline has the shortest history in Bulgaria compared with other disciplines of equestrian sports. Endurance competitions are held over distances from 40 km to 160 km. The present study focused on the effect of exercise on horses over a distance of 120 km. Changes in the following hematological parameters were investigated: Leukocytes (WBC, g/l); Erythrocytes (RBC, T/l); Platelets (PLT, g/l); Hemoglobin (Hb, g/l); Hematocrit (HCT,%); Mean corpuscular volume (MCV, fl); Mean corpuscular hemoglobin (MCH, pg); Mean cell hemoglobin concentration (MCHC, g/l), Leukogram (Eos; Bas; Neu; Lym; Mon,%) as well as some electrolytes and hormone concentration. The study aimed to establish the changes in these indicators' values before and after the competition. Analysis of the haemogram showed a significant increase in the mean values ​​of 4 of the indicators under study. No significant differences were established in MCV, MCH and MCHC. A decrease was found in the number of Lym, Eos, and Mon and a significant increase in Neu after the competition. The concentration of electrolytes (Ca, Na and K) in the blood serum decreased, and the levels of CK and LDH significantly increased.A disciplina de resistência tem a história mais curta na Bulgária em comparação com outras disciplinas de esportes equestres. As competições de resistência são realizadas em distâncias de 40 km a 160 km. O presente estudo focou no efeito do exercício em cavalos em uma distância de 120 km. Foram investigadas alterações nos seguintes parâmetros hematológicos: Leucócitos (g/l); Eritrócitos (T/l); Plaquetas (g/l); Hemoglobina (g/l); Hematócrito (%); Volume corpuscular médio (VCM, fl); Hemoglobina corpuscular média (HCM, pg); Concentração de hemoglobina corpuscular média (CHCM, g/l), Leucograma (Eos; Bas; Neu; Lin; Mon,%), bem como alguns eletrólitos e concentração hormonal. O estudo teve como objetivo estabelecer as mudanças nos valores desses indicadores antes e depois da competição. A análise do hemograma mostrou um aumento significativo nos valores médios de 4 dos indicadores estudados. Não foram encontradas diferenças significativas no VMC, HCM e CHCM. Foi encontrada uma diminuição no número de Lin, Eos e Mon e um aumento significativo em Neu após a competição. A concentração de eletrólitos (Ca, Na e K) no soro sanguíneo diminuiu e os níveis de Creatina Quinase (CK) e Lactato Desidrogenase (LDH) aumentaram significativamente

EXPERIMENTAL STUDY OF SURFACE ROUGHNESS IN VIBRO-IMPACT CUTTING OF OPTICAL SLUGS

In the article, experimental studies were carried out with the aim of determining the influence of different modes of vibro-impact cutting modes of optical slugs on the roughness of obtained surfaces. From the results obtained during the measurements and their mathematical processing are evaluated the average sizes and  intervals and the parameters of the roughness of treated surfaces.

DESIGNING A LABORATORY STAND FOR TESTING IMPACT RESISTANCE OF PLASTIC FILMS BY FREE-FALLING DART DROP ACCORDING ASTM D1709

In this article, the process of designing a laboratory stand for testing impact resistance of plastic films using free-falling dart drop method according to ASTM D1709, type A will be followed. It will be analyzed the all stages of designing-synthesis of project solutions, analysis and optimization, assessment and presentation of tasks. The purpose of the article is to create a designing basis for the variable design of impact resistance stands to be used in the design of non-standardized laboratory equipment

OPTIMIZING 3D PRINTING PARAMETERS TO IMPROVE HARDNESS AND SURFACE ROUGHNESS

The purpose of this paper is to study the factors affecting roughness and hardness of 3D printed models. Two parameters are analyzed- 3D printing speed and layer thickness. The main disadvantage of 3D printed models is their higher roughness, which depends on the printing parameters. In order to obtain parts with smoother surfaces, it is necessary to study these parameters. Based on the obtained experimental results, a regression dependence was built describing the relationship between roughness and hardness with the investigated printing parameters