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Tytuł:
Head transplant - the newest reports and concerns on planned procedure
Autorzy:
Gołębiowska, Maria
Gołębiowska, Beata
Powiązania:
https://bibliotekanauki.pl/articles/1167190.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
head to body transplant
head transplant
human cephalic anastomosis
Opis:
Transplantation, one of the most intensively developing fields of medicine, is giving patients hope for the chance of "second life" and health. The 21st century medical achievements heralded to achieve more difficult challenges, such as face transplant or lower extremity transplant. Among the futuristic dreams of the scientists, one of the projects - the Head to Body Transplant, stands out as one of the most controversial surgeries of the century. The aim of this study was to present the current state of art in medical aspect on cephalic anastomosis, as well as ethical implications. Among articles in PubMed Medline database related to human cephalic anastomosis, head transplant, head to body transplant keywords, 15 articles were selected for further analysis. Reviewed research presents significant development in conduction of the human cephalic anastomosis project. Most of the crucial parts of the surgery, such as deep profound hypothermia, spinal cord anastomosis - the detachment and fusion with the fusiogenes particles, have been practiced on animal models. The more newest revelations are revealed to the public, the more ethical and technical concerns are raised, primarily in terms of one-center study aprroach, infavourable benefit-cost ratio and futuristic apprehensions of infertility, transsexual or even unnatural life prolongation reasons for performing this type of surgery.
Źródło:
World Scientific News; 2018, 105; 212-217
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sharp-crested weir head losses investigation
Autorzy:
Korniichuk, V.
Khlapuk, M.
Bezusyak, O.
Yasinska, L.
Powiązania:
https://bibliotekanauki.pl/articles/104623.pdf
Data publikacji:
2018
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
flow energy
total head
head losses
nappe
jet flow
Opis:
The work is devoted to the rectangular sharp-crested weir calculation methods improvement. This can be realized by using mathematical model developed on energy and momentum conservation principles. In order to get energy conservation equation within sharp-crested weir we have to know weir head losses. This article presents theoretical and experimental investigations of the sharp-crested weir head losses. The height of the weir plate pw and weir head H are estimated as main operating factors that determine hydraulic weir outbound parameters: threshold depth h and the specific weir flow q. The flow moving over sharp-crested weir suffers sudden vertical contraction and transforms from the uniform flow to a jet. Mentioned above, causes sharp-crested weir head losses. To determine these losses, we propose to use Hind’s formula that describes similar contraction losses in the channel. Experimental investigations proved Hind’s formula application adequacy to evaluate these losses. Sharpcrested weir energy conservation equation that includes head losses is determined. Graphs set out in the article disclose the influence of the main operating factors and their ratio on the relative head losses.
Źródło:
Czasopismo Inżynierii Lądowej, Środowiska i Architektury; 2018, 65, 1; 27-34
2300-5130
2300-8903
Pojawia się w:
Czasopismo Inżynierii Lądowej, Środowiska i Architektury
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Head of State’s Constitutional Liability
Autorzy:
Grabowska, Sabina
Powiązania:
https://bibliotekanauki.pl/articles/594608.pdf
Data publikacji:
2017
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
head of stat
constitutional liability
parliament
constitutional court
referendum
Opis:
The paper aims to introduce the concept of constitutional liability of the President, and the institutions of the President’s constitutional liability. The author presents the liability and its relations with other types of head of state’s liabilities. The presented analysis includes all European countries.
Źródło:
Polish Political Science Yearbook; 2017, 1 (46); 153-167
0208-7375
Pojawia się w:
Polish Political Science Yearbook
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The embarrassment of riches: ‘Head’ words in the Indo-European family
Autorzy:
Gąsiorowski, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/1121045.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Indo-European; 'head' words;
semantics;
Opis:
The notion of HEAD is reflected in the basic lexicon of all known languages; the identification of the head as a distinct and vitally important body part, labelled with a simplex word, seems to be a cross-cultural universal. Thanks to their high frequency of use and their “basic concept” status, words meaning ‘head’ tend to be diachronically stable and therefore important for comparative reconstruction. Their expected retention rate – as estimated on the basis of data from several uncontroversial language families – is on a par with words meaning ‘heart’ or ‘foot’. On the other hand, culture-specific factors may lead to the proliferation of secondary meanings, the rise of stylistically marked near-synonyms, and consequently to locally accelerated lexical evolution. This seems to have happened repeatedly in the Indo-European family, in which not only the oldest reconstructible ‘head’ word, *ḱreh₂- but also secondary, branch-specific terms have often been subject to lexical replacement. This unusual variability of words for head in Indo-European contrasts with the remarkable conservatism of words for several other body-part concepts, such as eye, ear, tooth and heart. In this paper, we shall attempt to identify recurrent patterns of semantic change in the emergence of new synonyms and the polysemic development of inherited ‘head’ words. Insights derived from recent studies of “embodiment” will be used to explain the observed tendencies.
Źródło:
Yearbook of the Poznań Linguistic Meeting; 2017, 3, 1; 101-115
2449-7525
Pojawia się w:
Yearbook of the Poznań Linguistic Meeting
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Head and Neck Lymphomas - Diagnostic Difficulties
Autorzy:
Neskoromna-Jędrzejczak, Aneta
Tyndorf, Marta
Arkuszewski, Piotr
Kobos, Józef
Powiązania:
https://bibliotekanauki.pl/articles/1396619.pdf
Data publikacji:
2012-02-01
Wydawca:
Index Copernicus International
Tematy:
lymphoma
head
neck
diagnostics
Opis:
Malignant lymphomas represent approximately 5% of all malignant neoplasm of the head and neck and may involve nodal or extranodal sites. The head and neck region is the second most frequent anatomical site of extranodal lymphomas (after the gastrointestinal tract). Most are non-Hodgkin lymphomas (NHL) of B-cell lineage. Hodgkin's lymphoma (HL) rarely occurs in extranodal site.The aim of the study was to evaluate head and neck manifestation of lymphoma (both HL and NHL) and emphasize diagnostic difficulties of these pathologies.Material and methods. Retrospective review of medical records of patients diagnosed for lymphomas in our department was performed. Authors analyzed demographic data as well as clinical manifestation and diagnostic trials.Results. 9 patients were included to the study. 7 of them suffered from extranodal NHL and 2 of them from HL (one patient - extranodal and one nodal manifestation). There were diagnostic complications in all cases and final diagnosis was made after surgical material analysis.Conclusions. This data demonstrate low sensivity of fine needle aspiration for identification of lymphoma as well as clinical picture is non characteristic.
Źródło:
Polish Journal of Surgery; 2012, 84, 3; 113-118
0032-373X
2299-2847
Pojawia się w:
Polish Journal of Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnostic sensitivity of ultrasonic mobile flaw detection of head checking type flaws in railway rails
Wrażliwość diagnostyczna ultradźwiękowych mobilnych badań wad typu head checking w szynach kolejowych
Autorzy:
Lesiak, P.
Powiązania:
https://bibliotekanauki.pl/articles/327484.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
wrażliwość diagnostyczna
szyny kolejowe
badanie ultradźwiękowe
wady head checking
diagnostic sensitivity
railway rails
ultrasonic test
head checking flaws
Opis:
This paper presents analysis of diagnostic sensitivity of ultrasonic mobile testing of railway rails done with the help of measurement car. To verify the concept, most hazardous flaws of head checking type were used. These faults cause multiple rail cracks and fractures. The properties of these flaws and testing procedures have been described together with diagnostic sensitivity analysis on the basis of measurements run on a representative section of railway main line.
W pracy przedstawiono analizę wrażliwości diagnostycznej, ultradźwiękowego mobilnego badania szyn kolejowych wagonem pomiarowym. Do weryfikacji wykorzystano niezwykle niebezpieczne wady typu head checking, które powodują liczne pęknięcia i złamania szyn. Omówiono właściwości tych wady, technologię badania oraz przeprowadzono analizę wrażliwości diagnostycznej na podstawie badań reprezentatywnego odcinka magistralnej linii kolejowej.
Źródło:
Diagnostyka; 2008, 2(46); 37-40
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Equivalent stress in a pressure vessel head with a nozzle
Autorzy:
Lewiński, J.
Powiązania:
https://bibliotekanauki.pl/articles/279523.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
pressure vessel
dished head
nozzle-vessel strength
Opis:
The paper is devoted to analysis of a dished head of a pressure vessel subject to internal uniform pressure and provided with a nozzle. A short survey of optimal design of the pressure vessel and its head is presented. The vessel head of a selected optimized shape is then completed by a nozzle, and the equivalent stress pattern is observed and recorded. The axis of symmetry of the nozzle is parallel to that of the vessel. The nozzle is placed in various distances from the axis of symmetry of the vessel. The dimensionless distance e between both axes varies from 0 (i.e. axisymmetric location) up to 0.8 (assuming that the radius of cylindrical part of the vessel is equal to 1). Results of numerical calculation are presented in plots and figures.
Źródło:
Journal of Theoretical and Applied Mechanics; 2014, 52, 4; 1007-1018
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Głowica wiatrakowca IL-28 umożliwiająca pionowy start
Rotor head of gyroplane with vwrtical take off posibil
Autorzy:
Delega, M.
Powiązania:
https://bibliotekanauki.pl/articles/212937.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
awionika
osprzęt lotniczy
głowica wiatrakowca IL-28
start pionowy
avionics
rotor head
rotor head of gyroplane
Opis:
W artykule przedstawiono projekt głowicy do wiatrakowca projektowanego w Instytucie Lotnictwa, w ramach grantu współfinansowanego przez Unię Europejską.
Following publication shows the design of gyroplane head designing by Institute of Aviation under grant supported by European Community.
Źródło:
Prace Instytutu Lotnictwa; 2009, 7 (202); 18-23
0509-6669
2300-5408
Pojawia się w:
Prace Instytutu Lotnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cross-correlation function in identifying head checking defects of the railway rails
Funkcja korelacji wzajemnej w identyfikacji wad head checking szyn kolejowych
Autorzy:
Lesiak, P.
Sokołowski, A.
Wlazło, M.
Powiązania:
https://bibliotekanauki.pl/articles/327852.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
cross-correlation
railway rails
defect head checking
laser scatterometry method
korelacja wzajemna
szyny kolejowe
wada head checking
metoda skaterometrii laserowej
Opis:
The cross-correlation function has been applied to the study of the similarity of the two functions. One of these functions is known and represents a defect type HC (Head Checking) in the railway rail. The second function is unknown and based on cross-correlation function of both functions specifies the parameters of the similarities. These functions correspond to defects whose images have been determined using laser scatterometry method. FFT method has been used to calculate these functions.
Zastosowano funkcję korelacji wzajemnej do badania podobieństwa dwóch funkcji. Jedną z tych funkcji jest znana i stanowi opis wzorca wady head checking (HC) w szynie kolejowej. Druga funkcja jest nieznana. Na podstawie funkcji korelacji wzajemnej obu tych funkcji, określa się parametry ich podobieństwa. Funkcje te reprezentują obrazy wyznaczone doświadczalnie, metodą skaterometrii laserowej. W obliczeniach wykorzystano szybką transformatę FFT.
Źródło:
Diagnostyka; 2017, 18, 2; 65-73
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neuroendocrine Carcinoma of the Head and Neck – review of literature
Autorzy:
Berger, G
Dawidziuk, T
Chyczewski, L
Powiązania:
https://bibliotekanauki.pl/articles/1401521.pdf
Data publikacji:
2016
Wydawca:
Index Copernicus International
Tematy:
neuroendocrine carcinoma
head and neck
Opis:
Neuroendocrine carcinoma is a rare neoplasm, and its most common location in the head and neck area is the larynx, especially the epiglottis and the supraglottic region. The first case of neuroendocrine carcinoma of the larynx was reported in 1969 by Goldman et al. Expression of the two crucial markers, synaptophysin and chromogranin, along with neural cell adhesion molecule (CD56) should be mentioned among the neuroendocrine features detected on immunohistochemistry. Human papilloma virus (HPV16/18) infection in the laryngeal neuroendocrine carcinoma can be one of the causal factors, and the detection of HPV should be considered as a standard procedure for the diagnosis and treatment.
Źródło:
Polski Przegląd Otorynolaryngologiczny; 2016, 5, 4; 16-21
2084-5308
2300-7338
Pojawia się w:
Polski Przegląd Otorynolaryngologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of Head Defect Images of Railway Rails in Laser Scatterometry
Ocena obrazów wad szyn kolejowych typu head checking w badaniach metodą skaterometrii laserowej
Autorzy:
Lesiak, P.
Sokołowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/215589.pdf
Data publikacji:
2017
Wydawca:
Instytut Kolejnictwa
Tematy:
railway rails
head checking
laser scatterometry method
similarity functions
distance function
szyny kolejowe
wady head checking
metoda skaterometrii laserowej
funkcje podobieństwa i odległości
Opis:
The images of head checking faults of railway rails have been examined by laser scattering method. The studies used the functions of similarity and distance, both for binary images and multi-level quantized ones. The analysis was performed on the basis of numerical calculations, experimentally determined images of samples of these defects. These type of functions have proven extremely useful in evaluating these faults and can be used to classify them.
Dokonano oceny obrazów wad szyn kolejowych typu head checking, zbadanych metodą skaterometrii laserowej. W badaniach wykorzystano funkcje podobieństwa i odległości, zarówno dla obrazów zbinaryzowanych, jak i skwantowanych wielopoziomowo. Analizę przeprowadzono na podstawie obliczeń numerycznych, wyznaczonych doświadczalnie obrazów próbek tych wad. Funkcje tego typu okazały się niezwykle przydatne w ocenie tych wad i mogą być wykorzystywane do ich klasyfikacji.
Źródło:
Problemy Kolejnictwa; 2017, 177; 37-43
0552-2145
2544-9451
Pojawia się w:
Problemy Kolejnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of the position of the head on the functioning of the human body: a systematic review
Autorzy:
Szczygieł, Elżbieta
Fudacz, Natalia
Golec, Joanna
Golec, Edward
Powiązania:
https://bibliotekanauki.pl/articles/2116542.pdf
Data publikacji:
2020-09-17
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
balance disorders
forward head posture
head
respiratory system
proprioception
neck
Opis:
The head is an important element of the biokinetic chain. Under physiological conditions, it should extend along the midline of the body. Due to its location and the fact that it constitutes approx. 6% of the total body weight, many authors believe it has a significant impact on its functioning. The aim of this study was to conduct a systematic literature search and to synthesize the evidence of the impact of the head posture on the functioning of the human body. A systematic review was conducted within 3 databases: PubMed, Medline OVID, and EBSCO, using the following terms: “forward head,” “posture,” “position,” and “neck.” For the analysis, scientific articles published after 2013 were selected. A total of 16 studies matched the inclusion criteria of this systematic review. Their results have proven that the position of the head has a significant effect on the human body. Research findings show that abnormal head position changes affect muscle activity, proprioception, the pattern of breathing and neck pain. This is the first systematic review of the relationship between the head posture, and the functioning of the human body. The results of this study seem to be promising if used in therapeutic practice.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2020, 33, 5; 559-568
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rotary Head Kinematics During Cleaning of Flat Surfaces
Autorzy:
Chomka, G.
Chudy, J.
Powiązania:
https://bibliotekanauki.pl/articles/386999.pdf
Data publikacji:
2012
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
głowica obrotowa
oczyszczanie
rotary head
prolate cycloid
cleaning
postprocessing traces
Opis:
The present article covers the problem of a mathematical description of the trajectory of those postprocessing traces that occur in the process of hydro jet cleaning of flat surfaces with the use of a rotary head. An analysis was conducted of postprocessing traces taking into consideration the provision of their uniform distribution. The determination of the conditions of an effective cleaning will allow such a selection of the working parameters of the head when a surface is obtained of a high quality, i.e. with a uniform degree of the removal of impurities.
Źródło:
Acta Mechanica et Automatica; 2012, 6, 3; 19-26
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Head Teacher’s Leadership Style on Tutor Satisfaction
Autorzy:
Pavlovic, Nebojsa
Powiązania:
https://bibliotekanauki.pl/articles/2031663.pdf
Data publikacji:
2014-06-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
leadership style
people oriented
head teacher
task oriented
tutor satisfaction
Opis:
This quantitative study aimed at establishing the effect that the type of leadership style adopted by the head teacher has on the employed tutor’s satisfaction. The study sample comprised 11 school head teachers and 109 tutors. The research utilized two tools in the collection of data, the first of which was used for head teachers and the other for tutors in the institution. The research instrument used to collect data in relation to this dependent variable was a Job Satisfaction Survey (JSS) questionnaire. This tool comprises 29 questions with Likert-type items that deal with job satisfaction. The results of the study show that the leadership style employed by the head teacher does not affect tutor satisfaction in a statistically significant way.
Źródło:
The New Educational Review; 2014, 36; 266-277
1732-6729
Pojawia się w:
The New Educational Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unpublished Portrait Head of a Young Man From Alexandria
Autorzy:
Fattah, Abdel Basset Ali Abdel
Powiązania:
https://bibliotekanauki.pl/articles/1774261.pdf
Data publikacji:
2021-06-25
Wydawca:
Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
Tematy:
Graeco-Roman Egypt
Alexandria
portrait head
Flavian period
Opis:
This article presents an unknown portrait head from the Flavian period, preserved in a storeroom in Alexandria (Egypt).
Źródło:
Światowit; 2020, 59; 153-160
0082-044X
Pojawia się w:
Światowit
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inżynierskie metody wspomagania leczenia deformacji główki dziecka
Engineer methods supporting treatment of children head deformation
Autorzy:
Gzik, M.
Wolański, W.
Tejszerska, D.
Lichograj, P.
Larysz, D.
Powiązania:
https://bibliotekanauki.pl/articles/98690.pdf
Data publikacji:
2009
Wydawca:
Politechnika Śląska. Katedra Biomechatroniki
Tematy:
dzieci
głowa
anatomia głowy
czaszka
patologia
children
head
head anatomy
skull
pathology
Opis:
W referacie przedstawione zostały badania modelowe dotyczące korekcji patologicznego ukształtowania głowy u dzieci. Wykorzystując program Mimics 11 Materialise sformułowano model bryłowy zdeformowanej czaszki dziecka w oparciu o zdjęcia tomografii komputerowej TK. W kolejnym etapie przeprowadzono analizę numeryczną w środowisku programu ANSYS w celu określenia stanu naprężeń i odkształceń wynikających z przyłożonych sił zewnętrznych. Badania mają charakter interdyscyplinarny są realizowane we współpracy inżynierów i lekarzy oddziału neurochirurgii dziecięcej.
Modelling researches of pathological children head deformation correction are presented in this paper. With use of Mimics 11 Materialise software solid model of analysed example were created on the basis of computer tomography scans. Next the model was imported to ANSYS program in order to estimate correlation between external forces and head deformation. The research has interdisciplinary character as cooperation between engineers and neurosurgeons.
Źródło:
Aktualne Problemy Biomechaniki; 2009, 3; 127-130
1898-763X
Pojawia się w:
Aktualne Problemy Biomechaniki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changeableness of selected characteristics of the head in the Rzeszów children and adolescents aged 4 to 18 in during a 35-year period
Autorzy:
Perenc, Lidia
Radochońska, Anna
Błajda, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/454763.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
time changes
children and adolescents
head indices
head circumference
Opis:
Introduction. Over the past decades, anthropometric studies have focused more on secular changes in body height and weight, and less on changes in head features. Meanwhile, changing socio-economic conditions, especially the nutritional status of the human population, support the need to document some of the metric head features in children and adolescents. Aim. The aim of this study was to determine whether there has been changes over time in the morphological development of the head with respect to socio-economic conditions at the turn of the last century on sample population of children and adolescents from Rzeszów. Material and methods. In the years 1978/79, 1993/94, 2003/04 and 2013/14, a total of 9041 Rzeszów children aged 4 to 18 were examined. Anthropometric measurements were based on a technique developed by Martin and Saller. The following features were taken into account: head length and width, morphological face height, maximum face width, nose height and width, and head circumference. The relevant head, face and nose indices were calculated from the measured data. New indices for head circumference have also been proposed. Results. Such changes as head elongation, shortening of morphological face and nose height, and widening of the nose from hyperleptorrhinus to leptorrhinus were found in both sexes. Conclusions. 1. During the past 35 years there have been noticeable changes in the morphological characteristics of the head, face and nose. 2. Further follow-up to the development of head features is recommended.
Źródło:
European Journal of Clinical and Experimental Medicine; 2017, 3; 217-232
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of Asymmetry in Head Related Transfer Functions
Autorzy:
Jasiński, Maciej
Żera, Jan
Powiązania:
https://bibliotekanauki.pl/articles/2055229.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
acoustics
sound processing
virtual reality
spatial sound
Head Related Transfer Functions
Opis:
The individual Head-Related Transfer Functions (HRTFs) typically show large left-right ear differences. This work evaluates HRTF left-right differences by means of the rms measure called the Root Mean Square Difference (RMSD). The RMSD was calculated for HRTFs measured with the participation of a group of 15 subjects in our laboratory, for the HRTFs taken from the LISTEN database and for the acoustic manikin. The results showed that the RMSD varies in relation to the frequency and as expected is small for more symmetrical HRTFs at low frequencies (0.3÷1 kHz). For higher frequency bands (1÷5 kHz and above 5 kHz), the left-right differences are higher as an effect of the complex filtering caused by anatomical shape of the head and the pinnae. Results obtained for the subjects and for data taken from the LISTEN database were similar, whereas different for the acoustic manikin. This means that measurements with the use of the manikin cannot be considered as perfect average representation of the results obtained or people. The method and results of this study may be useful in assessing the symmetry of the HRTFs, and further analysis and improvement of how to considered the HRTFs individualization and personalization algorithms.
Źródło:
International Journal of Electronics and Telecommunications; 2022, 68, 2; 193--200
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the reliability of clinical examination in predicting traumatic cerebral lesions and skull fractures in patients with mild and moderate head trauma
Autorzy:
Żyluk, Andrzej
Mazur, Agnieszka
Piotuch, Bernard
Safranow, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1396507.pdf
Data publikacji:
2013-12-01
Wydawca:
Index Copernicus International
Tematy:
head injury
head computer tomography
clinical decision rules
Opis:
The aim of the study was to assess the reliability of neurological examination and other factors in predicting traumatic cerebral lesions and skull fractures in patients with mild and moderate head trauma (GCS 10-15). Material and methods. Over a one-year period, 227 patients: 145 male and 82 female, aged a mean of 51 years who sustained mild or moderate head trauma (GSC 10-15) were examined neurologically and had performed head CT scans. The neurological examination as a whole and each finding of the neurological examination were tested as predictors of the presence of traumatic abnormalities in the head CT scan. Results. Post-traumatic lesions in head CT scan were found in 109 patients (48%): skull fractures in 66 of these and brain injuries in 94; fifty-eight patients had skull fracture combined with brain injury. Seventeen patients required neurosurgical intervention (hematoma evacuation). Abnormal neurological examination showed the highest reliability in identifying patients with brain injuries in CT (sensitivity 87%, specificity 79%). Of single findings, gait abnormalities and consciousness disturbances, present in sober patients, were the strongest predictors of cerebral lesions. Likewise, abnormal neurological examination was the best indicator of skull fractures (sensitivity 77%, specificity 63%). Gait abnormalities and “racoon eyes” present in alcohol intoxicated patients were the strongest individual predictors of skull fractures. Conclusion. Results of our study show neurological abnormalities as the most reliable (although not 100% accurate) in identifying patients who are likely to have brain injuries and/or skull fracture following head trauma. Use of clinical decision rules may reduce the number of head CT scans performed “just in a case”.
Źródło:
Polish Journal of Surgery; 2013, 85, 12; 699-705
0032-373X
2299-2847
Pojawia się w:
Polish Journal of Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Predesign of a cylinder head of compression ignition engine
Autorzy:
Nowakowski, Jacek
Sikora, Krzysztof
Cypcer, Szymon
Powiązania:
https://bibliotekanauki.pl/articles/132894.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
cylinder head
stress analysis
FEM
głowica cylindrowa
analiza naprężeń
Opis:
The paper presents the initial design of the four-cylinder CI engine head and the analysis of the strength of the head with the use of FEM. The article covers: general assumptions of the designed head, analytical design calculations, three-dimensional head model and timing system components using CAD. The scope of calculations using the head calculation model includes strength calculations and determination of the amount of strain caused by the given load.
Źródło:
Combustion Engines; 2019, 58, 4; 236-242
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A bull’s-head rhyton from the Museum of Tarsus in Cilicia, southern Turkey
Autorzy:
Lafli, Ergün
Powiązania:
https://bibliotekanauki.pl/articles/1632647.pdf
Data publikacji:
2020-12-19
Wydawca:
Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
Tematy:
rhyton
Hellenistic ceramics
bull’s head
Cilicia
Turkey
Opis:
In this brief paper a terracotta rhyton in the form of a bull’s head is presented which is exhibited in the museum of Tarsus and probably belongs to the first century B.C. The rhyton, a ceremonial vessel form from earlier periods, was mostly used as a votive vessel in the graves of the Hellenistic period. Archaeological context of this vessel in Tarsus, that has been acquired by the museum in 1973, is not known, but its status of preservation as well as the craftsmanship of its ornaments attracts a special attention.
Źródło:
Polish Archaeology in the Mediterranean; 2020, 29(2); 281-293
1234-5415
Pojawia się w:
Polish Archaeology in the Mediterranean
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kazimierz Stepczak 1936-2013 - obituary
Autorzy:
Staff, Head and
Powiązania:
https://bibliotekanauki.pl/articles/83367.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Źródło:
Folia Malacologica; 2014, 22, 1
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessing the impact of certain exercises on the spatial head posture
Autorzy:
Szczygieł, Elżbieta
Sieradzki, Bartosz
Masłoń, Agata
Golec, Joanna
Czechowska, Dorota
Węglarz, Karolina
Szczygieł, Radosław
Golec, Edward
Powiązania:
https://bibliotekanauki.pl/articles/2161991.pdf
Data publikacji:
2019-02-27
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
forward head posture
head
exercises
craniovertebral angle
job workers
prophylactic of neck pains
Opis:
Objectives The head constitutes 6% of the total body weight, which is linked to the cervical spine and all other joints through the kinematic chain by various muscles. The forward head posture is one of the most common postural disorders and seems to be especially dangerous. The goal of the work was to assess the impact of 4 weeks of training neck and nape muscles on the head posture. Material and Methods The subjects were 20 participants, who performed neck exercises for 20 days. The head posture in a sagittal and frontal plane was assessed photogrammetrically twice: before and after the exercises. The following have been used for the assessment: craniovertebral (CV) angle, head tilt angle (HT), and frontal head tilt angle (FHT). Results After a 20-day program of neck and nape exercises the values of specific angles were compared. The results indicated significant changes in the head posture. In the sagittal plane: the average value of the CV angle before the training was 47.17°, and 50.82° after the training; the average value of the HT angle before the exercises was at 20.99°, and 24.31° after. In the frontal plane the average value of the FHT angle before the exercises was at 2.71°, and after 20 days of training the average value of this angle decreased to 2°. Conclusions The results demonstrate that a short, home-based targeted exercise program can improve head posture. Int J Occup Med Environ Health. 2019;32(1):43–51
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2019, 32, 1; 43-51
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Finite element head model for the crew injury assessment in a light armoured vehicle
Autorzy:
Burkacki, Michał
Wolański, Wojciech
Suchoń, Sławomir
Joszko, Kamil
Gzik-Zroska, Bożena
Sybilski, Kamil
Gzik, Marek
Powiązania:
https://bibliotekanauki.pl/articles/27324139.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
head model
HIC
head injury
safety assessment
model głowy
uraz głowy
ocena bezpieczeństwa
Opis:
Purpose: The aim of this paper was the development of a finite element model of the soldier’s head to assess injuries suffered by soldiers during blast under a light armoured vehicle. Methods: The application of a multibody wheeled armoured vehicle model, including the crew and their equipment, aenabled the researchers to analyse the most dangerous scenarios of the head injury. These scenarios have been selected for a detailed analysis using the finite element head model which allowed for the examination of dynamic effects on individual head structures. In this paper, the authors described stages of the development of the anatomical finite element head model. Results: The results of the simulations made it possible to assess parameters determining the head injury of the soldier during the IED explosion. The developed model allows the determination of the parameters of stress, strain and pressure acting on the structures of the human head. Conclusion: In future studies, the model will be used to carry out simulations which will improve the construction of the headgear in order to minimize the possibility of the head injury.
Źródło:
Acta of Bioengineering and Biomechanics; 2020, 22, 2; 173--183
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania przemysłowe przekładni organu urabiającego kombajnu chodnikowego
Industrial tests of gear of the roadheader’s cutter head
Autorzy:
Miczyński, R.
Gągałka, K.
Powiązania:
https://bibliotekanauki.pl/articles/199154.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniki Górniczej KOMAG
Tematy:
badanie przekładni organu urabiającego
przekładnia organu urabiającego
kombajn górniczy
organ urabiający
tests of cutter head’s gear
cutter head’s gear
roadheader
Opis:
W artykule zaprezentowano metodę oraz wyniki badań nowego typu przekładni organu urabiającego kombajnu górniczego podnoszącego wydajność i bezpieczeństwo w czasie eksploatacji w podziemiach zakładu górniczego. Przygotowanie koncepcji przekładni wymagało wykonania wspomaganej komputerowo analizy wytrzymałościowej metodą elementów skończonych, której prezentację wyników przedstawiono w niniejszym artykule. Wnioski z badań umożliwiły akceptację budowy prototypu przekładni. Na podstawie doświadczeń z eksploatacji prototypu stwierdzono wzrost użyteczności przekładni poprzez podniesienie wydajności i bezpieczeństwa pracy przekładni organu urabiającego w kombajnie chodnikowym.
The method and results of testing the new type of gear of roadheader’s cutter head, which increases production output and safety during operation in mine underground are presented. Realization of the gear concept required computer aided strength analysis by the finite elements method, results of which are presented in the paper. Conclusions from the performed tests enabled acceptation of the gear prototype. Experience from operation of the gear prototype proved increase of production output and safety of the gear of roadheader’s cutter head.
Źródło:
Maszyny Górnicze; 2016, 34, 4; 58-70
0209-3693
2450-9442
Pojawia się w:
Maszyny Górnicze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Report from the analysis of implementiation of 4th Head and Neck Cancer Awareness Week in Department of Otolaryngology in Międzyleski Hospital in Warsaw
Autorzy:
Dżaman, Karolina
Piskadło–Zborowska, Karolina
Pietniczka–Załęska, Mirosława
Powiązania:
https://bibliotekanauki.pl/articles/1398499.pdf
Data publikacji:
2017
Wydawca:
Index Copernicus International
Tematy:
European Head and Neck Cancer Awareness Week
head and neck tumors
Opis:
Introduction: The aim of the study was to analyze the profile of patients who reported for free screening examinations during the 4th European Head and Neck Cancer Awareness Week to the Department of Otolaryngology, Miedzylesie Specialist Hospital, Warsaw, Poland. Material and methods: We enrolled 225 patients, aged 26-92 years (mean, 63 years). There were 149 women (66%) and 76 men (34%). All patients filled out a survey regarding risk factors of head and neck cancer (HNC), including symptoms and lifestyle characteristics. Subsequently, all participants underwent a complete laryngological examination. Results: Among the studied patients, we found the following lifestyle-related risk factors of HNC: tobacco use (22%), alcohol use more than 1 time per week (12%), oral sex (17%), multiple sexual partners (10%), rare dental checkups (24%), and dental prostheses (45%). The most frequent symptoms that prompted the patients to report for screening exams were as follows: chronic hoarseness (64%), xerostomia (39%), dysphagia (37%), nasal congestion (6%), and neck tumor (5%). Further imaging studies were ordered in 15 patients (7%), fiberoscopy in 25 (11%), and lesion excision in 18 (8%). Among the studied patients, 17 were referred for further oncological treatment, of whom 14 had benign tumors and 4 malignant tumors. Conclusions: The Head and Neck Cancer Awareness campaign increased the awareness of HNC, and it should systematically encompass people at increased risk. By implementing this program in our department, we were able to detect and initiate early treatment in 7.5% of the screened people. However, appropriate workup and treatment require funding and therefore systemic measures should be taken to enable a wide implementation of such screening programs.
Źródło:
Polish Journal of Otolaryngology; 2017, 71, 6; 35-39
0030-6657
2300-8423
Pojawia się w:
Polish Journal of Otolaryngology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The evaluation of the influence of head implant surface roughness on the wear of UHMWPE cup
Autorzy:
Sedlacek, R.
Tuzarova, Z.
Powiązania:
https://bibliotekanauki.pl/articles/286109.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
implants
head surface roughness
UHMWPE
Opis:
The aim of this study was the evaluation of the influence of head surface roughness on the wear of the acetabular component of implant. The experiments were executed for the combination of UHMWPE (Ultra High Molecular Weight Polyethylene) implant cup and metal head of implant with several different surface roughnesses. Testing method was based on Pin-on-Disc principle. Finally the recommendation for head surface roughness was established. The special experiments were carried out in accredited “Mechanical Testing Laboratory” (quality system ISO 17025) in collaboration with the Academy of Sciences of the Czech Republic and company BEZNOSKA Corporation - developing and producing bone-substitute biomaterials and implants.
Źródło:
Engineering of Biomaterials; 2008, 11, no. 77-80; 13-14
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dermoidal cysts of head and neck in children
Autorzy:
Piszcz, Małgorzata
Skotnicka, Bożena
Hassmann-Poznańska, Elżbieta
Gościk, Elżbieta
Reszeć, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/1401794.pdf
Data publikacji:
2015
Wydawca:
Index Copernicus International
Tematy:
dermoid cysts
head and neck
children
Opis:
Introduction: Dermoid cysts are benign epidermal tumors; in 7% of cases, they are located in the head and neck region. They are lesions of congenital origin, mostly presenting within the midline of the body. About 70% of cases are diagnosed before the age of 5 years. Methods: A retrospective analysis of medical data of children with dermoid cysts located within the head and neck region treated in the Department of Pediatric Otolaryngology in Bialystok in the period of 1994-2014 was performed. A review of relevant literature was presented. Results: A total of 17 patients were included in this study, with a mean age of 8.9 years; 76.5% of the study population was female. Dermoid cysts were mostly located in the anterior neck region and the floor of the mouth (76%). US and CT imaging scans were used in diagnostics. No recurrences were observed after surgical excision. Conclusion: Dermoid cysts should be taken into consideration when diagnosing head and neck masses in pediatric patients.
Źródło:
Polski Przegląd Otorynolaryngologiczny; 2015, 4, 2; 66-70
2084-5308
2300-7338
Pojawia się w:
Polski Przegląd Otorynolaryngologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Koncepcja "aktywnego" zagłówka
Active head restraint concept
Autorzy:
Sokalski, L.
Waściszewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/210442.pdf
Data publikacji:
2006
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
bezpieczeństwo bierne
zagłówek aktywny
zderzenie pojazdów
passive safety
active head restraint system
collision accident
Opis:
Do najbardziej niebezpiecznych dla życia i zdrowia osób jadących samochodem należą sytuacje ruchu, podczas których następuje zderzenie samochodu z przeszkodą na drodze. Do często występujących zderzeń można zaliczyć uderzenie w tył samochodu przez inny samochód lub uderzenie tyłem samochodu w przeszkodę podczas ruchu wstecznego. Na obrażenia narażone są głównie: głowa i górna część kręgosłupa. Stosowanym urządzeniem ochronnym jest zagłówek mocowany na oparciu fotela. Niestety, zagłówek obecnie stosowany nie jest skutecznym środkiem zabezpieczenia przed urazami. Koncepcja "aktywnego" zagłówka dotyczy nowego, oryginalnego sposobu ochronnego, zmniejszającego ryzyko urazów i utraty zdrowia, podnoszącego warunki bezpiecznej jazdy.
The traffic situations where a car hits an obstacle on the road cause the most serious danger to health and life of car occupants. In such accidents, the occupants' heads and necks are exposed to the greatest hazard. To protect these parts of the body from injury, head restraint systems are used. Alas, the head restraint systems used at present are not sufficiently effective. Therefore the concept of an "active" head restraint system has been proposed. In such a system, a possibility of automatic positioning of the headrest and suppression of the dynamic movement of the head and neck is provided. The new idea reduces the risk of injury and improves occupants' safety during a collision accident.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2006, 55, 3; 168-182
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Head-Related Transfer Function Selection Using Neural Networks
Autorzy:
Yao, S.-N.
Collins, T.
Liang, C.
Powiązania:
https://bibliotekanauki.pl/articles/176307.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
head-related transfer function
neural networks
localisation
music
audio
anthropometry
pinna
Opis:
In binaural audio systems, for an optimal virtual acoustic space a set of head-related transfer functions (HRTFs) should be used that closely matches the listener’s ones. This study aims to select the most appropriate HRTF dataset from a large database for users without the need for extensive listening tests. Currently, there is no way to reliably reduce the number of datasets to a smaller, more manageable number without risking discarding potentially good matches. A neural network that estimates the appropriateness of HRTF datasets based on input vectors of anthropometric measurements is proposed. The shapes and sizes of listeners’ heads and pinnas were measured using digital photography; the measured anthropometric parameters form the feature vectors used by the neural network. A graphical user interface (GUI) was developed for participants to listen to music transformed using different HRTFs and to evaluate the fitness of each HRTF dataset. The listening scores recorded were the target outputs used to train the neural networks. The aim was to learn a mapping between anthropometric parameters and listener’s perception scores. Experimental validations were performed on 30 subjects. It is demonstrated that the proposed system produces a much more reliable HRTF selection than previously used methods.
Źródło:
Archives of Acoustics; 2017, 42, 3; 365-373
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ podatności główki szyny na rozkład przemieszczeń wzdłużnych przy hamowaniu pociągu
Efect of rail head receptance on longitudal displacement distribution under breaking forces
Autorzy:
Czyczuła, W.
Urbanek, M.
Powiązania:
https://bibliotekanauki.pl/articles/383872.pdf
Data publikacji:
2017
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
przemieszczenie wzdłużne szyny
efekt „head on web”
hamowanie pociągu
longitudinal rail displacements
effect „head on web”
train braking
Opis:
Praca dotyczy analizy przemieszczeń wzdłużnych główki i osi szyny przy występowaniu obciążeń, jakie pojawiają się przy hamowaniu pociągu. Analiza została przeprowadzona przy użyciu numerycznego, trójwymiarowego modelu szyny. Wyniki analizy zilustrowano przykładami obliczeniowymi. Dokonano także porównania rezultatów analizy numerycznej z wynikami, uzyskanymi przy użyciu modelu analitycznego.
The paper deals with the analysis of longitudinal displacements of the rail head and rail axis under the loads that occur at the braking of the train. The analysis was carried out using a numerical three-dimensional rail model. The results of the analysis are illustrated by computational examples. The results from numerical and analytical models are comparded.
Źródło:
Archiwum Instytutu Inżynierii Lądowej; 2017, 25; 107-114
1897-4007
Pojawia się w:
Archiwum Instytutu Inżynierii Lądowej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Contre les têtes des mots
Against the heads of words
Autorzy:
Rechad, Mostafa
Powiązania:
https://bibliotekanauki.pl/articles/2109545.pdf
Data publikacji:
2019-12-30
Wydawca:
Uniwersytet w Białymstoku. Wydawnictwo Uniwersytetu w Białymstoku
Tematy:
mots
tête morphologique
tête syntaxique
suffixes
RHR
interfaces
morphologie
Word
Morphological head
Syntactic head
affixes
morphology
Opis:
Dans ce travail, il était question de vérifier si le mot a une tête morphologique. Suite aux faits de langues différentes, nous avons d´emontré la faiblesse de RHR infirmant le parallélisme entre morphologie et syntaxe. Nous constatons que le processus de la formation des mots dans les langues naturelle est très complexe et concluons que l’interaction entre la morphologie et les autres niveaux linguistiques peut aider à mieux comprendre ce processus.
The question of derivation and the internal structure of words are the subject of this paper. we presented and discussed the Righthand Head Rule. Following several language facts, we concluded that RHR is not universal.We deduced also that word formation is closely related to interfaces and distributed morphology.
Źródło:
Białostockie Archiwum Językowe; 2019, 19; 319-327
1641-6961
Pojawia się w:
Białostockie Archiwum Językowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Clinical manifestation of malignant lymphomas of the head and neck region
Autorzy:
Bojanowska-Poźniak, Katarzyna
Nurkowska, Monika
Danilewicz, Marian
Pietruszewska, Wioletta
Powiązania:
https://bibliotekanauki.pl/articles/1398500.pdf
Data publikacji:
2017
Wydawca:
Index Copernicus International
Tematy:
malignant lymphoma
head and neck neoplasm
extranodal lymphoma
Opis:
Introduction: Malignant lymphoma (ML) is a neoplasm caused by clonal expansion of undifferentiated B, T and NK-lymphoid cells. WHO classification divides lymphomas into two main types, i.e. Hodgkin lymphoma (HL), and non-Hodgkin lymphoma (NHL), with numerous subtypes. The majority of MLs are localized in lymph nodes, but extranodal locations are also possible. MLs represent approximately 3-5% of all malignant neoplasms in Poland, but their incidence has been increasing in recent years, especially in young patients. The objective of the study was to evaluate clinical manifestations and diagnostic process in patients with malignant lymphomas of the head and neck region as diagnosed in the Department of Otorhinolaryngology of the Medical University of Lodz in years 2013-2017. Material and method: 30 patients diagnosed with malignant lymphomas of the head and neck region at the Departbadament of Otorhinolaryngology of the Medical University of Lodz in 2013-2017. Results: The study group consisted of 8 cases of nodal lymphomas and 22 cases of extranodal lymphomas. In 29 cases B-cell lymphomas were diagnosed. The most common symptoms included lymphadenopathy or neck tumor. Other symptoms were associated with the location of tumors in particular body organs. The diagnosis was based on histopathological examination of biopsy (needle or surgical) samples. Conclusion: Malignant lymphomas should be taken into account during differential diagnosis of the tumor or lymphadenopathy of the neck. The diagnosis is difficult because of the nonspecificity of symptoms and the need for interdisciplinary cooperation of many specialists.
Źródło:
Polish Journal of Otolaryngology; 2017, 71, 6; 14-21
0030-6657
2300-8423
Pojawia się w:
Polish Journal of Otolaryngology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Causes and consequences of head injuries among rural inhabitants hospitalised in a Multi-Organ Injury Ward. II. Circumstances, types and consequences of head injuries
Autorzy:
Karwat, I D
Krupa, S.
Gorczyca, R.
Powiązania:
https://bibliotekanauki.pl/articles/52226.pdf
Data publikacji:
2009
Wydawca:
Instytut Medycyny Wsi
Tematy:
rural inhabitant
head injury
injury
consequence
injury type
circumstance
poisoning
Polska
social problem
rural population
Źródło:
Annals of Agricultural and Environmental Medicine; 2009, 16, 1; 23-29
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of criteria for elective tracheostomy in head and neck cancer surgery
Autorzy:
Kissin, Filip
Rysz, Maciej
Budziszewska, Magdalena
Krajewski, Romuald
Powiązania:
https://bibliotekanauki.pl/articles/1397292.pdf
Data publikacji:
2021
Wydawca:
Index Copernicus International
Tematy:
elective tracheostomy
head and neck surgery
postoperative complications
Opis:
Elective tracheostomy before resection of a malignancy in head and neck region assures unobstructed ventilation during postoperative period but is associated with an increased risk of complications. We aimed to evaluate retrospectively, how the application of elective tracheostomy scales would influence the frequency of tracheostomy in comparison with preoperative clinical judgement. In 205 patients operated on from 2013 till 2017, theresection of a malignancy involved suprahyoid or pharyngeal muscles, neck dissection and flap reconstruction. The decision on elective tracheostomy was made on the clinical basis. Score for each patient in 3 published scales was calculated. In the study group 76 patients had elective tracheostomy at the outset of a resection procedure. Among 129 patients without elective tracheostomy, 9 had tracheostomy in the postoperative period. Indications for elective tracheostomy were calculated for scale I, II and III. Only in 120 patients the decision whether to perform elective tracheostomy would be identical in each scale. Our results suggest that decisions to perform elective tracheostomy based on 3 scales show low specificity. The factors used in the published scales should be evaluated in a prospective multicenter study
Źródło:
Polish Journal of Otolaryngology; 2021, 75, 4; 20-26
0030-6657
2300-8423
Pojawia się w:
Polish Journal of Otolaryngology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The stiffness characteristics of a healthy or damaged by aseptic necrosis femoral head
Autorzy:
Loskutov, A.E.
Krasovsky, V.L.
Oleynik, A.E.
Powiązania:
https://bibliotekanauki.pl/articles/280154.pdf
Data publikacji:
1999
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
aseptic necrosis
femoral head
stiffness
indentor test
Opis:
The goal of the paper is to investigate the stiffness characteristic of bone tissue of healthy femoral head as well as its degradation caused by aseptic necrosis.
W pracy zbadano sztywność tkanki kostnej zdrowej główki kości udowej oraz wykazano zmiany charakterystyki w główce udowej zdegenerowanej przez martwicę.
Źródło:
Journal of Theoretical and Applied Mechanics; 1999, 3; 625-638
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The temperature and stress field of the ceramic-capped cylinder head of the hypothetical adiabatic diesel engine
Autorzy:
Jaskólski, J.
Krzyżak, R.
Powiązania:
https://bibliotekanauki.pl/articles/241933.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
cylinder head
PtAu alloy
thermal conductivity
thermal stress
Opis:
Four of five models of the ceramic-slab-capped cast-iron cylinder head for a prospective adiabatic engine were numerically investigated. The models were designed using several crystallochemical-mineralogical considerations. The outcome of some short radiation and convection Fortran95 programmes became the input data for the FEM programme of temperatures and stresses. It turns out, that in general the material that cannot withstand will hardly be ceramics, but the cast iron. Thence, the latter should be replaced, plated or the ceramics should cover it at the injection jet. The temperatures and stresses were analysed with and without an interlayer. Two models, with feldspars and Ti6Al4V or Pt30Au70, were quite promising, the first one being surely at once applicable even without interlayer i.e. according to FEM. The stresses in the models with YSZ, cerium disilicide and/or pyroxene, in spite of the crystallochemical hattrics deemed successful, betoken spallation of the YSZ. The problems of emissivity were addressed as well. There exists a blank range of temperature where neither radiation-related algorithm nor the common conductivity one can perform well. The surface of the head under hood appears 'quite cold', except the exhaust pipe, the TBC solution of which is left in abeyance in this paper. Adiabatic engines using ceramic as the material for the combustion camber walls were developed for the reduction of cooling loss and the in crease of exhaust energies.
Źródło:
Journal of KONES; 2008, 15, 4; 635-640
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dobór elementów konstrukcyjnych głowicy wkręcającej
Selection of structural members of the driving head
Autorzy:
Nieoczym, A.
Powiązania:
https://bibliotekanauki.pl/articles/252899.pdf
Data publikacji:
2012
Wydawca:
Instytut Naukowo-Wydawniczy TTS
Tematy:
głowica wkręcająca
moment dokręcania
elementy konstrukcyjne
screwing-in head
power tightening moment
structural members
Opis:
W artykule przedstawiono podstawowe zależności wchodzące w skład ogólnego równaniem bilansu momentu układu napędowego i roboczego głowicy wkręcającej. Wskazano zależności pomiędzy cechami konstrukcyjnymi głowicy a uzyskiwanym momentem dokręcającym. Zaprezentowano program komputerowy umożliwiający dobór podstawowych elementów głowicy zależności od rozmiaru gwintu wkręcanej śruby i wartości momentu dokręcania.
In the article basic relations being a member were described general with leveling balance of the moment of the driving system and working of driving head. Relations were shown between design features of the head and the get moment screwing in properly. Computer programs enabling the selection of basic components were introduced to the head of the screw palmed off on the dependence on the size of the thread and the value of the moment of screwing in properly.
Źródło:
TTS Technika Transportu Szynowego; 2012, 9; 375-382, CD
1232-3829
2543-5728
Pojawia się w:
TTS Technika Transportu Szynowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The “head of State” in both Polish “April” Constitutions
Autorzy:
Sarnecki, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/618415.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Opis:
The author compares the position of the President of the Polish Republic in both indicated Constitutions (23rd April 1935 and 2nd April 1997). They are very similar in their formal structure but the President’s position in the Constitution of 1935 is remarkably more powerful to compare with that of 1997. The analysis made in the article can have its significance in current discussion in Poland, concerning the constitution’s reforms.
Artykuł nie zawiera abstraktu w języku polskim
Źródło:
Studia Iuridica Lublinensia; 2014, 22
1731-6375
Pojawia się w:
Studia Iuridica Lublinensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Axial Dimension of Static Head-to-Head Domain Boundary in Amorphous Glass-Coated Microwire
Autorzy:
Kladivová, M.
Ziman, J.
Kecer, J.
Duranka, P.
Powiązania:
https://bibliotekanauki.pl/articles/1030252.pdf
Data publikacji:
2017-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Kj
75.60.Ch
Opis:
A new experiment allowing the study of static domain boundary dimensions in bistable microwire is proposed. In this experiment a static domain boundary is created by an inhomogeneous axial magnetic field. The changes in axial magnetic flux due to the presence of this boundary were measured along the microwire using two pick-up coils. Experimental results were compared with a simple theoretical model. For Fe_{77.5}Si_{7.5}B_{15} microwire with total diameter of 30 μm and metal nucleus diameter of 15 μm, good agreement between theoretical and experimental data was obtained for an axial dimension of the static domain boundary about 200 times larger than the diameter of the wire metallic core.
Źródło:
Acta Physica Polonica A; 2017, 131, 4; 639-641
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Updated National Comprehensive Cancer Network guidelines for treatment of head and neck cancers 2010-2017
Autorzy:
Wierzbicka, Małgorzata
Napierała, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/1398501.pdf
Data publikacji:
2017
Wydawca:
Index Copernicus International
Tematy:
head and neck cancers treatment guidelines
biological therapy
personalized treatment
recommendations
Opis:
Introduction: The diagnostic and therapeutic recommendations have been changing over the years to improve treatment outcomes and quality of life of Head and Neck Cancer (HNC) patients. Aim: The aim of this study was to present currently recommended Head and Neck Cancer treatment guidelines based on the literature review with particular emphasis on novel approaches the NCCN algorithms. Material and methods: The review of literature covering articles published in the last five years and pointing out essential changes in HNC treatment regarding evidence based medicine. The study focused on the analysis of novel approaches for the particular primaries, the implementation of biological therapies and personalized cancer therapies. Results: Updates in the oncological NCCN guidelines for all ENT primaries except major salivary glands and subglottis are based on knowledge derived from the basic sciences, clinical trials and the best evidence available currently. The latest recommendations emphasize value of biological therapies use.
Źródło:
Polish Journal of Otolaryngology; 2017, 71, 6; 1-6
0030-6657
2300-8423
Pojawia się w:
Polish Journal of Otolaryngology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
OBOWIĄZEK ZATRUDNIENIA KIEROWNIKA URZĘDU STANU CYWILNEGO I JEGO ZASTĘPCY W ŚWIETLE PRZEPISÓW NOWEJ USTAWY PRAWO O AKTACH STANU CYWILNEGO Z DNIA 28 LISTOPADA 2014 ROKU
The duty to employ the head and deputy head of Public Registry Office in light of the provisions of the new act of Public Registry Records Law of 28 November 2014
Autorzy:
Gurdek, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/444007.pdf
Data publikacji:
2019
Wydawca:
Wyższa Szkoła Humanitas
Tematy:
kierownik USC
zatrudnienie kierownika USC
zatrudnienie zastępcy kierownika USC
kompetencje wójta jako kierownika USC
head of Public Registry Office
employing the head of Public Registry Office
employing the deputy head of Public Registry Office
competences of a borough leader as the head of Public Registry Office
Opis:
W nowej ustawie Prawo o aktach stanu cywilnego z dnia 28 listopada 2014 roku ustawodawca pomimo wprowadzenia wielu zmian pozostał wierny zasadzie, zgodnie z którą kierownikiem USC jest wójt. Zachował również obowiązek zatrudnienia innej osoby na stanowisku kierownika USC w okręgach, w których zamieszkuje ponad 50 tys. osób. Zrezygnował natomiast z obligatoryjnego zatrudnienia w tych okręgach jego zastępcy. Ta zmiana, chociaż wydawać by się mogła drobna, powoduje, że tylko pogłębiają się istniejące od lat rozbieżności poglądów na temat tego, czy wójt zatrudniający inną osobę na stanowisku kierownika USC zachowuje uprawnienia w zakresie rejestracji stanu cywilnego, czy też nie. Dlatego też autorka poddaje dogłębnej analizie nowe rozwiązania, poszukując odpowiedzi na pytania: czym kierował się prawodawca, dokonując tych zmian oraz jakie mogą one wywołać wątpliwości i skutki prawne w praktyce? Ponieważ czynności z zakresu rejestracji stanu cywilnego mają bardzo doniosłe znaczenie prawne, autorka postuluje, żeby legislator w końcu tak uregulował te kwestie, by były one jednoznaczne. W związku z tym sama nie pozostaje bierną i proponuje de lege ferenda śmiałe rozwiązania prawne, które pozwoliłyby na ich eliminację.
In the new act of Public Registry Records Law of 28 November 2014, despite introducing a lot of changes, the legislator has maintained adherence to the principle according to which a borough leader is the head of Public Registry Office. What has also been kept is the duty to employ another person on the post of the head of Public Registry Office in the districts inhabited by more than 50 thousand people while the obligatory employment of the deputy head of Public Registry Office in those districts has been given up. However minor the change seems to be, it brings about the situation in which all the opinion discrepancies that has existed for many years concerning the question whether a borough leader employing another person on the post of the head of Public Registry Office maintains the rights in the scope of registering the marital status or not. This is why the author makes a thorough analysis of new solutions looking for answers to the following questions: what guided the legislator in making those changes, what doubts can they raise and what results can they have in practice? Since activities in the scope of registering marital status are of utmost legal importance, the author demands the legislator should finally regulate the issues so that they are explicit. Due to that fact she is not passive herself and suggests de lege ferenda bold legal solutions which would enable to eliminate them.
Źródło:
Roczniki Administracji i Prawa; 2019, 2, XIX; 133-149
1644-9126
Pojawia się w:
Roczniki Administracji i Prawa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of radial flow impeller balance holes on the net positive suction head for rotodynamic pumps
Autorzy:
Karaśkiewicz, K.
Złoty, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/175487.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
balance holes
net positive suction head (NPSH)
centrifugal pumps
cavitation
Opis:
The influence of balance holes of rotodynamic pumps on the net positive suction head is not fully clear. The lack of available information on the subject leads to the situations when deterioration in suction properties of the pump due to the presence of balance holes is recognized during pump test phase. Usually some holes are arbitrarily plugged. The paper analyses the influence of balance holes on net positive suction head characteristics. The measurement data are presented.
Źródło:
Transactions of the Institute of Fluid-Flow Machinery; 2017, 136; 47-54
0079-3205
Pojawia się w:
Transactions of the Institute of Fluid-Flow Machinery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Validating full cavitation model with an experimental centrifugal pump
Autorzy:
Li, W., -G.
Powiązania:
https://bibliotekanauki.pl/articles/1954444.pdf
Data publikacji:
2014
Wydawca:
Politechnika Gdańska
Tematy:
centrifugal pump
cavitation
incipient cavitatio
suction performance
net positive suction head required
net positive suction head available
CFD
Opis:
The full cavitation model is increasingly applied in the cavitating flow simulation and the cavitation performance prediction of a centrifugal pump to improve or optimize its hydraulic design. Since the model involves surface tension and non-condensable gas content, it can be potentially applied in predicting cavitation behaviour of a centrifugal pump when handling viscous oils that possess different surface tension and gas content than water. However, the model has not been validated extensively against experimental incipient cavitation and NPSHr (net positive suction head required) data so far. In the paper, the cavitation performance of an experimental centrifugal pump is investigated using the CFD code and the full cavitation model when pumping water. The incipient cavitation number-flow rate curve and head-NPSHa (net positive suction head available) relationship are established and compared with experimental observations. The relationship between the head and integrated vapour-liquid volume ratio in the impeller is argued. The influence of the non-condensable gas content and turbulence model on the head-NPSHa curve is clarified. The cavity pattern predicted is compared with the visualized one. The computational methods adopted and the results achieved here can be useful for the cavitation performance prediction of a centrifugal pump in engineering.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2014, 18, 1; 81-100
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acute Radial Head Resection for Fracture: are We Likely to Miss an Essex-Lopresti Injury?
Autorzy:
Zhang, Dafang
Benavent, Kyra A.
Dyer, George S.M.
Earp, Brandon E.
Blazar, Philip
Powiązania:
https://bibliotekanauki.pl/articles/28409349.pdf
Data publikacji:
2021-08-21
Wydawca:
Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica
Tematy:
Essex-Lopresti injury
forearm instability
radial head excision
radial head fracture
radial head resection
Opis:
Background. Given the current available evidence, surgical treatment of radial head fracture with acute resection is controversial. The aim of this study was to determine whether acute resection of the radial head for a radial head fracture leads to longitudinal forearm instability due to a missed Essex-Lopresti injury. Material and methods. A retrospective review was conducted of radial head resections performed for acute radial head fractures at two Level I trauma centers from 2000 to 2018. A total of 11 patients met inclusion criteria. Our primary outcome was a missed Essex-Lopresti injury at time of final clinical follow-up. Long-term telephone follow-up was attempted for QuickDASH, pain scores, and satisfaction scores. Results. Of the 11 radial head fractures in this study, intraoperative radial pull tests were performed and normal in 6 patients. No patient was found to have a missed Essex-Lopresti injury at a mean of 36.2 months’ clinical follow-up after radial head resection. At a mean telephone follow-up of 12.6 years in available patients, mean QuickDASH was 3.4, mean satisfaction was 9.75 out of 10, and no further complication or reoperation was reported. Conclusion. Our findings challenge the dogma that the radial head cannot be safely excised in the setting of acute fracture, even with elbow instability and/or wrist pain, particularly when intraoperative longitudinal stability is assessed by a stress maneuver.
Źródło:
Ortopedia Traumatologia Rehabilitacja; 2021, 23(4); 263-270
1509-3492
2084-4336
Pojawia się w:
Ortopedia Traumatologia Rehabilitacja
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Engineering design of low-head Kaplan hydraulic turbine blades using the inverse problem method
Autorzy:
Krzemianowski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/200629.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
inverse method
hydraulic turbine blade design
low-head Kaplan turbine
curvilinear coordinate system
Christoffel symbols
Opis:
The paper concerns the engineering design of guide vane and runner blades of hydraulic turbines using the inverse problem on the basis of the definition of a velocity hodograph, which is based on Wu’s theory [1, 2]. The design concerns the low-head double-regulated axial Kaplan turbine model characterized by a very high specific speed. The three-dimensional surfaces of turbine blades are based on meridional geometry that is determined in advance and, additionally, the distribution of streamlines must also be defined. The principles of the method applied for the hydraulic turbine and related to its conservation equations are also presented. The conservation equations are written in a curvilinear coordinate system, which adjusts to streamlines by means of the Christoffel symbols. This leads to significant simplification of the computations and generates fast results of three-dimensional blade surfaces. Then, the solution can be found using the method of characteristics. To assess usefulness of the design and robustness of the method, numerical and experimental investigations in a wide range of operations were carried out. Afterwards, the so-called shell characteristics were determined by means of experiments, which allowed to evaluate the method for application to the low-head (1.5 m) Kaplan hydraulic turbine model with the kinematic specific speed (»260). The numerical and experimental results show the successful usage of the method and it can be concluded that it will be useful in designing other types of Kaplan and Francis turbine blades with different specific speeds.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 6; 1133-1147
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biomechanical influences on head posture and the respiratory movements of the chest
Autorzy:
Szczygieł, E.
Węglarz, K.
Piotrowski, K.
Mazur, T.
Miętel, S.
Golec, J.
Powiązania:
https://bibliotekanauki.pl/articles/306621.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
klatka piersiowa
głowa
postawa
chest
head
posture
Opis:
Purpose. The head represents 6% of total body weight, therefore it can significantly affect the biomechanics of human posture control, movements and activities. When set out of vertical body axis, head position interferes with the work of the other links in the kinematic chain. The aim of our study was to evaluate the effect of head posture on the breathing activities of the chest. Material and methods: The research was conducted on a group of 65 patients (51 years ± 9.8 years), including 48 women and 17 men. Head posture and chest movements were assessed using a photogrammetric method. Results: The results confirmed the existence of a negative correlation between head position in the sagittal plane and movements of lower ribs. Forward head posture resulted in lower amplitude of costal arch motion: for the transverse plane Spearman’s R = –0.296, for the frontal plane; –0.273, –0.289. Tilting the head in the frontal plane also influenced the change in the biomechanics of breathing and contributed to a reduction of respiratory movements of the lower ribs Spearman’s R = –0.260. Conclusions: Changing the position of the head causes disturbances in the three-dimensional shape of the chest and its respiratory movements.
Źródło:
Acta of Bioengineering and Biomechanics; 2015, 17, 2; 143-148
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental studies of the influence of human standing positions on the feet-to-head transmission of vibrations
Autorzy:
Książek, M. A.
Tarnowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/281080.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
human body
standing position
Feet-to-head vibration transmission
Opis:
The experiments performed on a especially built test stand, concerning the influence of human body position on the feet-to-head vibration transmission are presented. The investigations have been performed for chosen amplitudes and frequencies of source acceleration excitations coming from a vertical shaker. The big influence of standing positions of a human body on the transmitted accelerations from feet to head has been measured and analyzed. Numerical results of variability of experimental studies have been statistically elaborated and graphically presented.
Źródło:
Journal of Theoretical and Applied Mechanics; 2014, 52, 4; 1107-1114
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-50 z 714

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