Control of the Hydrofoil Ship

1967 ◽  
Vol 20 (03) ◽  
pp. 292-303 ◽  
Author(s):  
P. Magini ◽  
J. Burroughs

Modern hydrofoil ships have evolved in response to the need for a fast reliable means of sea transportation which is capable of operating in all sea conditions. It is the purpose of this paper to describe how the application of modern stabilization and navigation technology to hydrofoil ships has contributed to the achievement of these goals.First, consider the subject of stability. In particular, consider the source of roll stability in three types of ships: a displacement ship; a surface piercing hydrofoil and a submerged-foil hydrofoil. A roll disturbance of each of the ships is depicted in Fig. 1. In both the displacement ship and in the surface piercing hydrofoil, the righting moment is produced entirely by the change in attitude of the ship relative to the water surface. In the case of the displacement ship, the righting moment is due to the shift of the centre of buoyancy. For the surface piercing hydrofoil, the moment occurs due to the shift of the hydrodynamic pressure centre of the foils. However, for the submerged-foil hydrofoil, no righting moment is produced by the change of the relative position of the water surface. The righting moment for this ship must be produced by underwater control surfaces in response to the change of ship attitude relative to inertial space, as sensed by a vertical gyro. It is this transfer of stability reference from the water surface to an inertial reference that leads to the superior seakeeping capabilities of the submerged foil hydrofoil.

2020 ◽  
Vol 15 (1-3) ◽  
pp. 44-59
Author(s):  
Lidia Peneva

Crimes against marriage and family are a particular group of social relation­ships that the law has defended properly in view of the high public significance and value they enjoy. At the moment they are regulated in Chapter VI, Section I, of the specific part of the Penal Code the Repub­lic of Bulgaria. The subject matter of this Statement will, however, be the legisla­tive provisions concerning these criminal­ized acts in retrospect. The purpose of the study is to show by historical method and through the comparatively legal method the development of these criminal groups during the periods of various criminal laws in Bulgaria. This will also provide a basis for reflection on possible de lege ferenda proposals. This report from a structural point of view will be divided into three distinct points, marking each of the penal laws in the Republic of Bulgaria, which were in force before 1968.


Cartilage ◽  
2021 ◽  
pp. 194760352110219
Author(s):  
Jonny K. Andersson ◽  
Elisabet Hagert ◽  
Mats Brittberg

Objective: Focal cartilage injuries, and posttraumatic osteoarthritis (OA) in the wrist are likely common and a cause of wrist pain. To estimate the incidence of cartilage lesions and to understand the pathomechanisms leading to wrist cartilage injuries and OA, a literature review on the subject was performed combined with a presentation of one of the authors’ own experience. Design: This study includes a literature review of the topic. As a comparison to the review findings, the observations of one of the authors’ consecutive 48 wrist arthroscopies, were assessed. PubMed, Scholar, and Cochrane databases were searched using the keywords “cartilage injury AND wrist AND treatment” and “wrist AND cartilage AND chondral AND osteochondral AND degenerative OA.” :Result A total of 11 articles, including 9 concerning chondral and osteochondral repair and treatment and 2 regarding posttraumatic OA, were retrieved. The cartilage repair treatments used in these articles were drilling, osteochondral autograft, juvenile articular cartilage allograft, and chondrocyte implantation. One article displayed concomitant cartilage injuries in displaced distal radius fractures in 32% of the patients. The review of our findings from a 1-year cohort of wrist arthroscopies showed 17% cartilage injuries. Conclusion: There is a lack of knowledge in current literature on cartilage injuries and treatment, as well as posttraumatic OA in the wrist. Cartilage injuries appear to be common, being found in 17% to 32% of all wrist arthroscopies after trauma, but no guidelines regarding conservative or surgical treatment can be recommended at the moment. Larger prospective comparative studies are needed.


2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Maja Dorota Wojciechowska

Purpose The purpose of the paper is to present the latest scholarly trends in the field of social capital in libraries, to review research concepts published by LIS professionals and to suggest further research possibilities in this area. Design/methodology/approach This paper presents a review and critical analysis of literature associated with research on social capital in libraries to highlight its importance for the development of LIS and its impact on the functioning of environments linked with various types of libraries. The goal of literature analysis was to determine the current condition of research on social capital in libraries. The main trends were identified and the need for further qualitative analyses, which are missing at the moment, was confirmed. Findings It was determined that, so far, LIS professionals have focussed mainly on the role of municipal libraries in developing social capital, the problem of building trust, especially in immigrant circles and the impact of libraries on promoting a civil society. Academic libraries, rural libraries, organisational capital in libraries and individual social capital of librarians were a much less frequent subject of research. The role of libraries in developing social capital in educational (primary and secondary education) and professional (non-university professionals) circles is practically non-existent in research, and it will require in-depth studies and analyses in the coming years. Originality/value This paper constitutes a synthetic review of the latest research concepts concerning social capital in libraries. It identifies the most important research trends and areas that so far have not been explored and suggests research methods to help LIS professionals design future research in this area more effectively.


Author(s):  
E.V. Bolshakov ◽  
◽  
I.D. Nazarov ◽  

The subject of the research within the framework of the article is the criminal procedure institute for the detention of a person on suspicion of committing a crime. The legal nature of this institution is analyzed, and comments are given on the normative legal acts and judicial practice regulating the issues of detention. The theoretical basis of the research is based on the publications of the last two decades on this problem, in particular, reflecting the discussion of the process scientists S. A. Shafer, S. B. Rossinsky and A. A. Tarasov, the subject of which was the issue of the legal nature of a suspect detention in a criminal case. In the paper, the authors ask the following questions: What is the detention of a person on suspicion of committing a crime in accordance with the legislation of the Russian Federation? From what moment does the detained person acquire the status of a suspect? Is it possible to detain a person before initiating a criminal case? The study concludes that a person acquires the actual status of a suspect from the moment of direct detention, that is, before documenting this status and, as a result, before initiating a criminal case. Amendments to the articles of the Criminal Procedure Code of the Russian Federation are proposed, and the authors` versions of the definitions of the concepts «detention of a suspect», «the moment of actual detention» and «pre-trial proceedings» are given.


Many attempts have been made to detect regularities amongst the numerous lines which constitute the secondary or many-lined spectrum of hydrogen. The extreme complexity of the spectrum may be realised from the fact that in the Bakerian Lecture of 1922 Merton and Barratt record some 750 lines in the interval between Hα (wave-number v = 5233.216) and Hβ ( v = 20564.793). Three methods of investigation may be employed in the search for regularities. (1) The lines may be classified according to their physical characteristics, such as intensity or mode of excitation, as in the tables of Merton and Barrat ( loc. cit .). (2) Lines may be grouped together by the discovery of relations between their wave-lengths or wave-numbers, as in the important groups of lines which have been arranged in bands by Fulcher. (3) Lastly, the question may be attacked from the theoretical side, and a model of the hydrogen molecule may be imagined, which will give rise to the emission of certain characteristic spectral lines. Thus Sutherland, working on the foundation of the classical mechanical laws, more than twenty years ago, came to the conclusion that spectral series must arise from kinematical considera­tions, and explained them by considering the nodal sub-divisions of a circle. At the present time we may expect more successful results to follow from the application of the quantum theory, and in this paper an endeavour will be made to examine the secondary spectrum of hydrogen, and more particularly the Fulcher bands, from this standpoint. I may add that my interest in the subject was aroused when attempting to construct a model of the hydrogen molecule, for it seemed that the most likely method of obtaining reliable information from the experimental side as to the moment of inertia of the molecule would be from a study of the spectrum of molecular hydrogen.


2019 ◽  
pp. 38-44
Author(s):  
Inga Kirkovs’ka

The aim of the investigation under consideration is to study the nature of the category of futurality within the system of modus categories in the French language. The object of the work is the category of futurality in contemporary French, the subject is the study of the category of futurality in contemporary French within the system of modus categories of evidentiality, modality and persuasiveness. In the course of the study, the distinctions between modality and modus have been outlined, the place of the category of futurality within the modus categories has been identified, the peculiarity of the category of futurality as a modus category has been analysed. Conclusions: the peculiarity of futurality as a modus category is that it belongs to the modus categories denoting action/event, real in the future “in the speaker’s view”. In this sense the category of futurality is closer to the categories of modality (real information stated by the speaker) and predicativity (confidence in the information stated by the speaker) in meaning, whereas differing from them by the semantics of the stated temporality denoting the relation of consequence in reference to the moment of speaking. The category of futurality is connected with other modus categories: category of assertion with semantics of neutral prospection, category of persuasiveness with the seme of assurance in reference to the future and category of modality with the seme of reality in reference to the future. The major types of modal meanings forming the modus category of futurality are: 1) speaker’s estimation of the subject matter of the utterance from the perspective of reality/irreality in the future; 2) estimation of the environment of the utterance from the perspective of probability/necessity/desirability in the future; 3) speaker’s estimation of the level of assurance (persuasiveness) of the subject matter of the utterance from the perspective of the future; 4) communicative function of the utterance defined by the purpose of the speaker from the perspective of the future (wish, intention, preference); 5) confirmation/negation of objective relations between objects, phenomena, events of the future. 


2022 ◽  
Vol 23 (2) ◽  
pp. 846
Author(s):  
Stanislas Martin ◽  
Audrey Foulon ◽  
Wissam El Hage ◽  
Diane Dufour-Rainfray ◽  
Frédéric Denis

The study aimed to examine the impact of the oropharyngeal microbiome in the pathophysiology of schizophrenia and to clarify whether there might be a bidirectional link between the oral microbiota and the brain in a context of dysbiosis-related neuroinflammation. We selected nine articles including three systemic reviews with several articles from the same research team. Different themes emerged, which we grouped into 5 distinct parts concerning the oropharyngeal phageome, the oropharyngeal microbiome, the salivary microbiome and periodontal disease potentially associated with schizophrenia, and the impact of drugs on the microbiome and schizophrenia. We pointed out the presence of phageoma in patients suffering from schizophrenia and that periodontal disease reinforces the role of inflammation in the pathophysiology of schizophrenia. Moreover, saliva could be an interesting substrate to characterize the different stages of schizophrenia. However, the few studies we have on the subject are limited in scope, and some of them are the work of a single team. At this stage of knowledge, it is difficult to conclude on the existence of a bidirectional link between the brain and the oral microbiome. Future studies on the subject will clarify these questions that for the moment remain unresolved.


2020 ◽  
Vol 4 (2) ◽  
pp. 109-116
Author(s):  
Margarita G. Kozlovskaya

The subject of the research is the criminal community, its characteristics, and features within the framework of criminology. The purpose of the research is to confirm or disprove hypothesis that a criminal community as a criminological phenomenon is nor equal to a criminal organization or an organized criminal group Methodology. The author uses general theoretical methods (comparative analysis, generalization, deduction) and specific methods (formal legal interpretation of legal acts, questionnaires). The main results, scope of application. A criminal organization and a criminal community are different criminological phenomena that differ from each other in significant ways. The differences are both in the degree of criminal organization, and the complexity of the structure of internal and external interaction. From the point of view of a systematic approach, a criminal community is not only a more complex system compared to a criminal organization. It is characterized by an improved structure of internal interaction, in which the hierarchical structure is either complicated, or replaced or supplemented by a network structure. The peculiarity is to complement the system approach with a synergistic one: in the criminal community, the pooling of criminal efforts is carried out more effectively, mainly in the sphere of external relations. The criminal community is a more open system compared to the criminal organization. Certain features can be identified in the contacts of criminal community members with the external environment. The most important feature is a symbiosis of criminal and legal practices that affects the life of entire regions or relatively large masses of the population. The criminal community is a purposeful system with its own specifics. And this specificity is seen in the fact that the criminal community pursues (secretly or openly, at the moment or in the foreseeable future) the achievement of political goals, namely: the possession of power, infiltration into power, undermining power, its capture and retention. It is power, not wealth, that is the real goal of the criminal community, and not just because it is easily converted into wealth. Power is valuable in itself, because it also gives a lot of other advantages. Conclusions. A criminal community cannot be reduced to a criminal organization, much less – to an organized criminal group, and this conclusion requires to be included into legislation.


2020 ◽  
Vol 17 (1) ◽  
pp. 29-45
Author(s):  
Vladimir A. MAZILOV

The article is devoted to the evaluation of perspectives of interdisciplinary researches using in psychological science in modern conditions. There are formulated approaches that let to improve the efficiency of interdisciplinary researches. Although this issue has received considerable attention of researchers, the problem is not solved at the moment. The theory of complex psychological researches as a scientific concept, reflecting the specificity of psychological research has not been developed yet. The reason for this is that researchers try to develop the principles of organization and procedure of this kind of researches. It is possible to develop the methodology and theory of complex psychological researches, based on the understanding of the subject of psychology. It is alleged that at present time the most adequate understanding of the subject of psychology is his interpretation like the subjective world of human.


Author(s):  
Irina Stanislavovna Morozova ◽  
Evgeniia Aleksandrovna Medovikova ◽  
Daria Nikolaevna Grinenko ◽  
Anastasiia Evgenevna Kargina

The actual problem of our time at the enterprises of the Kuzbass coal industry is the moment of ensuring the psychological security of the employee's personality. Psychological security is a fairly broad concept that includes many components and is exposed to various factors [2]. The aim of the study is to consider the importance of self-regulation of the individual as a condition for ensuring the safety of the subject of professional activity. The following methods and techniques were used in the study: The method "Style of self-regulation of behavior" by V. I. Morosanova; Test "Meaning-life orientations" by D. A. Leontiev; Questionnaire by H. Zachera and M. Freze "Professional time perspective of the future". The research is based on the development and testing of the technology of psychological and pedagogical influence in the form of reflexive seminars, which allows to increase the level of awareness of self-regulation of subjects of professional activity.


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