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Tytuł:
A cost benefit analysis approach to identify improvements in merchant navy deck officers’ HELM (Human Element Leadership and Management) training
Autorzy:
Saeed, F.
Bury, A.
Bonsall, S.
Riahi, R.
Powiązania:
https://bibliotekanauki.pl/articles/117272.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Maritime Education and Training (MET)
human element leadership
management training
Human Element Leadership and Management (HELM)
Decision Tree Modelling
Bayesian Networks
Non-Technical Skills (NTS)
deck officers
Opis:
A review of maritime accidents conducted over the last decade confirms that human error is the main contributing factor in these incidents. Well‐developed Non‐Technical Skills (NTS) can reduce the effects of human error. NTS include both interpersonal and cognitive skills such as situation awareness, teamwork, decision‐making, leadership, managerial skills, communication and language skills. In a crisis situation good NTS allow a deck officer to recognise the problem quickly, take action to manage the situation, and utilise the available team members safely and effectively. This paper identifies the importance of NTS training for merchant navy deck officers. It also highlights room for improvement in the existing HELM training. Research has shown that at present the structure of HELM training is not very effective. The other safety critical domains’ efforts into NTS developments are investigated and examples of best practice are adapted into the maritime domain’s NTS training. Suggestions are given for improvements to the HELM course based on proven successful methods in other safety critical domains (aviation and anaesthesia). A subsequent Cost Benefit Analysis for improving deck officers’ NTS is also carried out through the use of Bayesian Networks and Decision Tree Modelling.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 4; 551-560
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Maritime situational awareness аs a key measure for safe ship operation
Autorzy:
Melnyk, Oleksiy
Bychkovsky, Yuriy
Voloshyn, Andrii
Powiązania:
https://bibliotekanauki.pl/articles/2173479.pdf
Data publikacji:
2022
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
maritime safety
human element
situational awareness
bezpieczeństwo morskie
czynnik ludzki
świadomość sytuacji
Opis:
The maritime industry is a high-risk industry, which constantly has to make decisions in a rapidly changing environment. Therefore, understanding the essence of "situational awareness" is very important for making the right decision. In this regard, it is obvious that a correct situation analysis, based on a theoretical basis, creates the proper prerequisites for making the right decision in a developing situation, and vice versa. Considering this fact, this article proposes to study the factors that influence this phenomenon, their regularities and connections. It presents the data of a survey among seafarers to determine the level of understanding of situational awareness as a predominant component of the human factor in most accidents in the maritime industry.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2022, 114; 91--101
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Problem Behaviours Among Children of Filipino Seafarers in Iloilo City, Philippines
Autorzy:
Jaleco, V. B.
Gayo, M.
Pador, R.
Alimen, R. A.
Powiązania:
https://bibliotekanauki.pl/articles/117524.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Human Factor
Crew Resource Management
Seafarers, Filipino
Children of Seafarers
Human Element
Statistical Study
Problem Behaviours
Opis:
The purpose of this study was to ascertain the problem behaviours among children of Filipino seafarers in Iloilo City, Philippines. The researchers used random sampling technique to determine the 200 respondents of the study. This research employed the descriptive method of analysis. The statistical tools were frequency and rank to describe the children problem behaviours. When taken as an entire group, data showed that the problem behaviours were self-centeredness, substance use, delinquency, and physical aggression. When grouped according to program, the problem behaviours were self-centeredness, delinquency, physical aggression, and substance use as reference to high school program, while those who were in college, the problem behaviours were self-centeredness, substance use, delinquency, physical aggression. When grouped according to sibling rank, the results showed that out of the 76 eldest children, the problem behaviours were self-centeredness, substance use, delinquency, and physical aggression. While, the problem behaviours of the 66 middle children of Filipino seafarers were self-centeredness, substance use, physical aggression, and delinquency. The 58 youngest children of Filipino seafarers’ problem behaviours were self-centeredness, substance use, physical aggression, and delinquency. When grouped according to gender, male children problem behaviours were self-centeredness, delinquency, substance use, and physical aggression. And, 86 female children problem behaviours were self-centeredness, delinquency, substance use, and physical aggression. As to the marital status, children whose parents were living, the problem behaviour were self-centeredness, substance use, delinquency, and physical aggression. Children of Filipino seafarers who had separated parents, the problem behaviours were self-centeredness, substance use, physical aggression, and delinquency.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 2; 221-224
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sustainable maritime career development: A case for maritime education and training (MET) at the secondary level
Autorzy:
Heirs, S.
Manuel, M. E.
Powiązania:
https://bibliotekanauki.pl/articles/1841561.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Maritime Education and Training
maritime career
International Maritime Organization
psychology
secondary education
human element
Opis:
This study interrogated the relevance of maritime education and training (MET) at the secondary level as an effective strategy for developing a sustainable supply of maritime labour and to mitigate current and future supply-demand imbalances arising from philosophical and sociological changes in society and in the maritime industry. Secondary education and its associated curriculum may be developed to form the underlying fundamentals of early awareness of maritime concepts targeted at youth of ages 11-18 years. To find answers to five research questions relating to this topic, a mixed method approach was applied in collecting and analysing data. The findings indicate strong evidence of the importance and relevance of MET at the secondary level. They further show this importance as it relates to an appreciation by the youth of the maritime industry as a domain for technical career options and to the creation of a sense of stewardship of the world’s oceans. Despite these positive findings, the study also finds that a number of key stakeholders are unaware of the potential and role of the maritime industry leading to a notable barrier to the implementation of MET at the secondary level and a lack of the necessary rigour and focus on promoting the industry to the youth via MET in secondary education. The study concludes by noting that there is a need for a focus on reforming the curricula of national secondary education system, where appropriate, as a first step towards the achieving the benefits of implementation of MET at the secondary level.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 1; 91-100
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Analysis of Marine Navigation and Safety of Sea Transportation by Iranian Women as Officer and Master Mariner
Autorzy:
Yousefi, H.
Powiązania:
https://bibliotekanauki.pl/articles/117549.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
marine navigation
Sea Transportation
STCW-95
Women
Human Element
Crew Resource Management
MET System in Iran
Leadership
Opis:
The author attempts to describe the safety factors which should be considered for the sea transportation through coastal waters and the International waterways. First segment of this paper is designated to investigate the role of females as crew and officer on board ships. Based on STCW95 Convention and from the professional point of view the author believes that the Iranian females can be able to take responsibility on board ship as officer or even master mariner. Boys and girls can learn the required theories at the college when they are Cadet and improve their skill on board ship; therefore, operation of the advanced equipment on board ship can be done by both sides easily. A section of this paper is devoted to elucidate the various aspects of Iranian culture for the sea jobs which are going to be carried out by Iranian women on board ships. Some technical suggestions will be described in this paper in order to be taken into account the cultural factors by the IMO representative and finally the Parliament of Islamic Republic of Iran. The existence of women especially Iranian women or the mixture of men and women officers on board Iranian ships in order to improve the safety factors of sea transportation will be discussed in depth.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 4; 463-467
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Human Element and Autonomous Ships
Autorzy:
Ahvenjärvi, S.
Powiązania:
https://bibliotekanauki.pl/articles/115965.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
human element
autonomous ship
unmanned ship
future of navigation
unmanned surface vessel (USV)
remote control
Human Machine Interface (HMI)
MUNIN project
Opis:
The autonomous ship technology has become a “hot” topic in the discussion about more efficient, environmentally friendly and safer sea transportation solutions. The time is becoming mature for the introduction of commercially sensible solutions for unmanned and fully autonomous cargo and passenger ships. Safety will be the most interesting and important aspect in this development. The utilization of the autonomous ship technology will have many effects on the safety, both positive and negative. It has been announced that the goal is to make the safety of an unmanned ship better that the safety of a manned ship. However, it must be understood that the human element will still be present when fully unmanned ships are being used. The shore-based control of a ship contains new safety aspects and an interesting question will be the interaction of manned and unmanned ships in the same traffic area. The autonomous ship technology should therefore be taken into account on the training of seafarers. Also it should not be forgotten that every single control algorithm and rule of the internal decision making logic of the autonomously navigating ship has been designed and coded by a human software engineer. Thus the human element is present also in this point of the lifetime navigation system of the autonomous ship.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 3; 517-521
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Considerations on limiting the elements of human factor influence on breakdowns of ships machinery illustrated by some case studies
Rozważania dotyczące ograniczenia wpływu elementów czynnika ludzkiego na awarie w siłowni okrętowej ilustrowane opisem pewnych charakterystycznych przypadków
Autorzy:
Listewnik, J.
Wiewióra, A.
Powiązania:
https://bibliotekanauki.pl/articles/258330.pdf
Data publikacji:
2007
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:
czynnik ludzki
znaczenie
bezpieczna eksploatacja
statek
globalizacja załóg
human element
importance
safe ship operation issues
globalisation of crew
Opis:
The paper in the first part introduces the reader into general issues contributing to the complex role of the human factor in safe ship operation. Futher the capacity that the International Maritime Organisation (IMO) attaches to the human element in shipping is discussed. Next, the International Safety Management (ISM) role towards safer ship operation and the economic viability of a shipowner is highlighted. The last part of the paper contains two case studies, the first illustrating the need for training expertise and certification for shipboard electrical officers and the second case giving an example how not observing simple procedures and checklists by the crew can lead to fatal and costly accident.
Artykuł w pierwszej części wprowadza czytelnika w ogólne problemy mające swój wkład w złożoną rolę czynnika ludzkiego w bezpiecznej eksploatacji statku. Rozpatrywany jest zakres roli, jaką Międzynarodowa Organizacja Morska (IMO) przywiązuje do elementu ludzkiego w żegludze. Następnie została przedyskutowana rola Międzynarodowego kodu bezpiecznego zarządzania (International Safety Management - ISM) z punktu widzenia bezpiecznej eksploatacji statku i ekonomicznej korzyści dla armatora. Ostatnia część artykułu zawiera opisy dwóch specyficznych awarii na statkach; pierwszy opis awarii "A" ilustruje konieczność szkolenia ekspertów i wydawania odpowiednich świadectw dla oficerów elektryków, drugi przypadek "B" stanowi przykład, jak nieprzestrzeganie przez załogę prostych procedur i list sprawdzających może prowadzić do fatalnych i kosztownych awarii.
Źródło:
Problemy Eksploatacji; 2007, 3; 147-157
1232-9312
Pojawia się w:
Problemy Eksploatacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A theoretical analysis of contemporary vessel navigational systems: assessing the future role of the human element for unmanned vessels
Autorzy:
Polemis, D.
Darousos, E. F.
Boviatsis, M.
Powiązania:
https://bibliotekanauki.pl/articles/24201340.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
safety at sea
unmanned vessel
human element
vessel navigational system
electronic navigation
bridge instruments
automatic navigation system
autonomous vessels
Opis:
This article aims to investigate the contemporary challenges of electronic navigation and assess the appropriate amendments should autonomous vessel technology becomes widespread in the near future. Vessel control systems and maritime communication are essential and sending and receiving alarm signals is critical to contemporary ship navigation. Numerous location and shipping information systems, such as GPS, Loran-C, and Decca, have arisen in recent decades to improve navigational safety. Other systems, including VHF and Inmarsat, have been developed to enhance the efficiency of maritime communication on board and to transmit risk and safety-related data. Additionally, safe navigation requires systems like Navtex, EGS, DSC, Epirb, and others [1].
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2022, 16, 4; 637--646
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of Chest Injury Mechanism Caused by Different Seatbelt Loads in Frontal Impact
Autorzy:
Xiao, S.
Yang, J.
Crandall, J. R.
Powiązania:
https://bibliotekanauki.pl/articles/306880.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
model ciała człowieka
FEM
kinematyka
klatka piersiowa
seatbelt restraint system
human body finite element model
kinematics
rib fractures
chest deflections
Opis:
The purpose of this quantitative study is to investigate the differences of the injury mechanism caused by two different types of seatbelts loads on the occupant chest. Methods: The finite element analysis is employed to compare the different responses of the human body model, including the comparison of kinematics, chest accelerations, seatbelt forces and chest injury outcomes regrading chest deflections and rib fractures. Results: The calculated rib strain/stress from simulations in force-limiting seatbelt are higher than that in the regular seatbelt. The forward movement and torso twist are both great in simulations with force-limiting seatbelt. Meanwhile, there are obvious differences in the injury outcomes of chest deflections and rib fracture risks under the different seatbelt loads. Conclusion: Results indicate the chest deflections and rib fracture risks are negatively correlated under the load of the force-limiting seatbelt, However, they are positively correlated to and determined by the seatbelt peak load of the regular seatbelt. This paper can provide a reference for study of the chest injury mechanism and the protection efficiency of seatbelt.
Źródło:
Acta of Bioengineering and Biomechanics; 2017, 19, 3; 53-62
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Finite element analysis of lower limb
Autorzy:
Zach, L.
Konvickova, S.
Ruzicka, P.
Powiązania:
https://bibliotekanauki.pl/articles/285347.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
finite element simulation
human lower limb
biomaterials
Opis:
This paper presents a finite element simulation of a human lower limb in a full extension after a knee joint arthroplasty. Aside a total knee endoprosthesis Medin Modulár (size 76, right knee) provided by Medin Orthopedics, a.s., Czech Republic, two long bones, femur and tibia were used. As for a load, more than 30 most important muscles of the lower limb and 8 knee ligaments were disigned. Compared with our former results, this model gives reduced stress and contact pressures values which were given by more realistic ankle and hip joint definition. Their distributions correspond our former findings.
Źródło:
Engineering of Biomaterials; 2008, 11, no. 77-80; 15-17
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Creating patient-specific Finite Element Models with a Simple Mesh Morpher
Autorzy:
Borysiak, M.
Krawczyk, Z.
Starzyński, J.
Powiązania:
https://bibliotekanauki.pl/articles/97553.pdf
Data publikacji:
2010
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
finite element method
electrotherapeutic
model of human body parts
Opis:
The paper presents a simple 3D finite element mesh morpher aimed at creation of patient-specific models of human body parts. These models are to be used in realistic simulation of magneto- and electrotherapeutic treatment. The presented morpher uses simple algorithm of guided stretching which needs only a few measurements of patients body, but it may deform some finite elements. A public domain code Stellar is used to fix these problems.
Źródło:
Computer Applications in Electrical Engineering; 2010, 8; 38-45
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The content of trace elements in the diet of adolescents in Warsaw
Zawartość pierwiastków śladowych w dietach młodzieży zamieszkałej w Warszawie
Autorzy:
Dybkowska, E.
Swiderski, F.
Waszkiewicz-Robak, B.
Powiązania:
https://bibliotekanauki.pl/articles/874929.pdf
Data publikacji:
2011
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
trace element
trace element content
iron
zinc
copper
human nutrition
diet
adolescent
Warsaw city
Opis:
The aim of the study is to assess the contents of iron, zinc and copper in the diet among of adolescents living in Warsaw. The intake of selected trace elements was estimated on the basis of three-day dietary records. Microelement contents in the diet were calculated using Food Composition Tables. The percentage of the RDA realization for the safe level was calculated on the basis of standards for Polish population, developed by National Food and Nutrition Institute. It was demonstrated that adolescents living in Warsaw had 50-60% copper-deficient diets. The content of iron and zinc in the diet of adolescents was about 10‑40% lower than recommended. Deficiency of iron in the body causes anaemia and influences learning process, therefore the content of this element in the diet of young people is especially important.
Celem pracy była ocena poziomu spożycia żelaza, cynku i miedzi przez młodzież zamieszkałą na terenie Warszawy. Średnie spożycie wybranych mikroelementów oszacowano na podstawie badań przeprowadzonych metodą trzydniowego bieżącego notowania oraz przy zastosowaniu tabel wartości odżywczej produktów spożywczych i odniesiono do norm dla ludności Polski opracowanych w Instytucie Żywności i Żywienia na poziomie bezpiecznym. Wykazano, że młodzież zamieszkała na terenie Warszawy miała diety niedoborowe w miedź w 50-60%. Zawartość żelaza i cynku w diecie badanych osób również była o ok. 10-40% niższa od zalecanej. Niedobór żelaza w organizmie powoduje niedokrwistość i wpływa na procesy uczenia się, dlatego zawartość tego pierwiastka w diecie osób młodych jest szczególnie istotna.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2011, 62, 2
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Patient-specific finite element analysis of frictional behavior in different esophageal regions during endoscopy
Autorzy:
Lin, Chengxiong
Ren, Pan
Li, Wei
Deng, Hengyi
Zhou, Zhongrong
Powiązania:
https://bibliotekanauki.pl/articles/27324143.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
human esophagus
frictional behavior
finite element model
patient
przełyk człowieka
zachowanie cierne
model elementów skończonych
pacjent
Opis:
Endoscopy is a common and effective method to treat digestive system diseases. Not only can it detect the physiological state of the digestive tract, but also can conduct clinical operations. As a result, it’s of great significance to make clear the relationship between the clinical operation and the complications. Methods: Considering the difficulty in measuring the contact force and determining the stress distribution in real time during endoscopy, a specific-patient finite element model for the frictional behavior at the endoscope-esophagus interface was built in current study. By collecting the CT data of the patient, a 3D esophagus model was built and divided into three characteristic regions (narrow region, thoracic region and abdominal region) according to the physiological structure. Results: Results showed that the radius of the narrowest position was the dominant factor for the maximum von Mises stress when the endoscope passed through the narrow region. For abdominal region and thoracic region, with the increasing coefficient of friction (COF) and amplitude, the total force duo to frictional force (CFSM), frictional dissipation (FD), strain energy (SE) and maximum von Mises stress (Max) all increased correspondingly. Meanwhile, the region of stress concentration gradually approached the initial contact stage. Conclusions: The results can provide theoretical basis and technical support for clinical application and offer some suggestions for medical workers during endoscopy as well.
Źródło:
Acta of Bioengineering and Biomechanics; 2020, 22, 2; 11--24
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of metal hazard taking hair as an indicator of trace element exposure to workers in occupational environment
Ocena zagrozenia zatruciem metalami na podstawie analizy wlosow jako wskaznika wystawienia robotnikow na dzialanie pierwiastkow sladowych w srodowisku pracy
Autorzy:
Mehra, R
Thakur, A.S.
Powiązania:
https://bibliotekanauki.pl/articles/14765.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
metal hazard
hair analysis
hazard indicator
trace element
element exposure
worker
occupational environment
health hazard
lead
calcium
magnesium
chromium
manganese
iron
nickel
copper
zinc
human body
mental stress
Opis:
The use of biological tissues as diagnostic tools of trace element level for recognising the disease status of an exposed human population is an important area of investigation. Quantitative analysis of 10 trace elements viz lead, calcium, magnesium, chromium, manganese, iron, nickel, copper, and zinc in the human body was performed using hair as biopsy material. In the present investigation, workers in a roadways workshop, locomotive workshop and Pb battery units were included as subjects. Head hair samples were collected from the nape region of the skull. Subsequent to sampling of hair, a questionnaire recommended by the World Health Organization was filled in order to obtain details about the subjects regarding occupation, duration of exposure, medical history, etc. Concentration of elements in hair was determined using an atomic absorption spectrophotometer. Workers under mental stress were treated as cases and workers without any symptoms of mental stress were chosen as controls. Significant difference in concentration of lead, calcium, magnesium, manganese, nickel, copper and zinc was found in hair of subjects with mental stress than those of controls. Concentration of chromium and iron was found higher in hair of subjects with mental stress but this difference was not significant with respect to controls.
Ważnym obszarem badań jest wykorzystywanie tkanek biologicznych do określania zawartości pierwiastków śladowych w celu diagnozowania chorób wśród populacji narażonych na skażenie środowiskowe. Analizowano zawartość 10 pierwiastków śladowych, m.in. ołowiu, wapnia, magnezu, chromu, manganu, żelaza, niklu, miedzi oraz cynku, w ciele ludzkim na podstawie włosów pobranych od robotników z warsztatów drogowych, kolejowych oraz mających do czynienia z akumulatorami zawierającymi rtęć. Próbki włosów pobrano z okolicy potylicznej czaszki. Po pobraniu próbek włosów, uczestniczący w badaniu wypełnili ankiety Oświatowej Organizacji Zdrowia, których celem było zebranie szczegółowych danych dotyczących miejsca pracy, czasu trwania ekspozycji na czynniki ryzyka, historii przebytych chorób, itp. Zawartość pierwiastków we włosach określono za pomocą spektrofotometru absorpcji atomowej. Robotnicy doświadczający stresu psychicznego zostali ujęci jako przypadki chorobowe, natomiast nie przejawiający objawów napięcia zostali potraktowani jako przypadki kontrolne. Stwierdzono istotne różnice w zawartości ołowiu, wapnia, magnezu, manganu, niklu, miedzi i cynku we włosach osób z objawami napięcia psychicznego w porównaniu z włosami pobranymi od osób bez takich symptomów. Zawartość chromu i żelaza we włosach osób z objawami stresu była także wyższa, ale różnice nie były istotne w porównaniu z kontrolą.
Źródło:
Journal of Elementology; 2010, 15, 4; 671-678
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An alternative 3D numerical method to study the biomechanical behaviour of the human inner ear semicircular canal
Autorzy:
Santos, C. F.
Belinha, J.
Gentil, F.
Parente, M.
Jorge, R. N.
Powiązania:
https://bibliotekanauki.pl/articles/951835.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
biomechanika
FEM
mechanika płynów
narząd przedsionkowy
ucho wewnętrzne
vertigo
biomechanics
finite element method
human vestibular system
fluid mechanics
inner ear
Opis:
Purpose: The vestibular system is the part of the inner ear responsible for balance. Vertigo and dizziness are generally caused by vestibular disorders and are very common symptoms in people over 60 years old. One of the most efficient treatments at the moment is vestibular rehabilitation, permitting to improve the symptoms. However, this rehabilitation therapy is a highly empirical process, which needs to be enhanced and better understood. Methods: This work studies the vestibular system using an alternative computational approach. Thus, part of the vestibular system is simulated with a three dimensional numerical model. Then, for the first time using a combination of two discretization techniques (the finite element method and the smoothed particle hydrodynamics method), it is possible to simulate the transient behavior of the fluid inside one of the canals of the vestibular system. Results: The obtained numerical results are presented and compared with the available literature. The fluid/solid interaction in the model occurs as expected with the methods applied. The results obtained with the semicircular canal model, with the same boundary conditions, are similar to the solutions obtained by other authors. Conclusions: The numerical technique presented here represents a step forward in the biomechanical study of the vestibular system, which in the future will allow the existing rehabilitation techniques to be improved.
Źródło:
Acta of Bioengineering and Biomechanics; 2017, 19, 1; 3-15
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
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