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Tytuł:
Accelerometer - Based Measurements of Axial Tilt
Autorzy:
Łuczak, S.
Powiązania:
https://bibliotekanauki.pl/articles/384680.pdf
Data publikacji:
2012
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
MEMS
accelerometer
tilt
measurements
Opis:
The paper deals with a specific type of tilt measurements, where an axial tilt is to be determined. The measurements are realized by means of accelerometers - MEMS devices most preferably. Various mathematical relations between the axial tilt and the Cartesian components of the gravitational acceleration are presented. Each relation is described in detail, especially in the terms of the resultant uncertainty of the measurement, as well as the requirements regarding the employed accelerometers. Results of experimental studies realized by means of commercial MEMS accelerometers are presented and discussed, especially with regard to the measurement accuracy that has been evaluated for each mathematical relation. Scope of application of each relation is proposed.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2012, 6, 1; 39-41
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low-range tilt sensing with mems accelerometers
Autorzy:
Łuczak, S.
Kołodziej, D.
Powiązania:
https://bibliotekanauki.pl/articles/385200.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
MEMS
accelerometer
tilt
accuracy
Opis:
Ways of adjusting MEMS accelerometers for tilt measurements over a small angular range of few degrees arc or less are considered with regard to achieving a possibly high accuracy. The paper describes some additional mechanical structures applied to overcome the problem of incompatibility between the large measuring range of MEMS accelerometers and the expected small angular measuring range.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 4; 93-95
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Orientation of lutein in a lipid bilayer - revisited
Autorzy:
Pasenkiewicz-Gierula, Marta
Baczyński, Krzysztof
Murzyn, Krzysztof
Markiewicz, Michał
Powiązania:
https://bibliotekanauki.pl/articles/1039792.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
molecular modeling
tilt angle
macular pigment
Opis:
Lutein is present in the human retina and lens, where it plays a protective role. As lutein is associated with the lipid matrix of biomembranes, the role depends on its membrane location. Experimental studies predicted two orientations of lutein in a phosphatidylcholine (PC) bilayer: vertical and horizontal. Using a molecular dynamics simulation, we observed, in two different PC bilayers, both orientations of lutein, and in each bilayer, a single change from vertical to horizontal orientation or vice versa. Both orientations were stabilized by hydrogen bonding of lutein OH groups with mainly carbonyl but also phosphate oxygen atoms of PC.
Źródło:
Acta Biochimica Polonica; 2012, 59, 1; 115-118
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gender differences in circulatory adjustment to head-up tilt test in health
Autorzy:
Rimi, S.A.
Rezwana, I.
Sultana, S.
Ferdousi, S.
Powiązania:
https://bibliotekanauki.pl/articles/2087921.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Opolski. Instytut Nauk o Zdrowiu
Tematy:
male
female
tilt test
SBP
DBP
Opis:
Background: A tilt table test is a useful, non-invasive technique that has been used for the last few decades to detect autonomic failure. The response to tilting may vary physiologically between sexes. Aim of the study: To assess the gender-specific changes in cardiovascular response to a tilt test in healthy subjects. Material and methods: This experimental study was conducted on 90 healthy males and females aged 18–60 years, from 2019 to 2020. Forty-five male subjects and 45 female subjects were included. Using a motorized tilt table, a tilt table test was performed at 60 degrees for 10 minutes. An automatic sphygmomanometer was used to measure blood pressure (BP), and heart rate (HR) and a pulse oximeter was used for the measurement of peripheral capillary oxygen saturation (SpO₂). An independent sample t test, a multiple regression analysis and a chi squared test were conducted for statistical analyses. Results: A significantly greater drop in systolic blood pressure (SBP) was observed in females, compared to males after tilting. In 5.5% of the subjects, orthostatic intolerance occurred, but there were no significant age or gender- specific differences in subjects with orthostatic intolerance. Conclusions: This study concluded that in response to tilting, cardiovascular response was less pronounced in females.
Źródło:
Medical Science Pulse; 2020, 14, 2; 10-14
2544-1558
2544-1620
Pojawia się w:
Medical Science Pulse
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The performance analysis of dusty photovoltaic panel
Autorzy:
Katoch, Minakshi
Dahiya, Vineet
Yadav, Surendra Kumar
Powiązania:
https://bibliotekanauki.pl/articles/27312227.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
dust accumulation
tilt angle
photovoltaics
solar panel
transmittance
Opis:
Solar photovoltaic power is widely utilized in the energy industry. The performance of solar panels is influenced by different variables, including solar radiation, temperature, wind speed, relative humidity and the presence of haze or dirt. Outdoor solar panels are particularly susceptible to a decrease in energy efficiency due to the accumulation of dust particles in the air, which occurs as a result of natural weather conditions. The extent of dust deposition is primarily determined by factors such as the tilt angle of the panel, wind direction, cleaning frequency as well as local meteorological and geographical conditions. The dust on the solar cell glazing reduces the optical transmittance of the light beam, causing shadowing and diminishing the energy conversion productivity of the panels. Sand storms, pollution levels and snow accumulations all significantly impact the photovoltaic panel performance. These circumstances reduce the efficiency of solar panels. The experiment was carried out on two identical dust-accumulated and dust-free panels. The evaluation was carried out in two different situations on the offgrid stand-alone system: in a simulated atmosphere and in an open space during the day. The current-voltage curves have been developed for both panels at various tilt degrees. The features provide sufficient information to analyse the performance of the panels under consideration. The measurements demonstrate that as dust collects on the panel’s surface, the average output power and short circuit current decrease dramatically. The installation tilt angle affected the ratio of efficiency and average power outputs of dusty and clean panels.
Źródło:
Archives of Thermodynamics; 2023, 44, 2; 49--68
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Data fusion in measurements of angular position
Autorzy:
Łuczak, S.
Powiązania:
https://bibliotekanauki.pl/articles/385274.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
data fusion
rotation-to-pulse angle sensor
tilt
Opis:
The paper describes a possibility of increasing accuracy of measurements of angular position with application of data fusion. Two cases of determining the angular position are considered: accelerometer-based measurements of tilt and measurements of angular position with application of incremental rotation-to-pulse sensor (coupled with an original measuring system described in the paper). Application of the proposed data fusion ensures in both cases decrease of the uncertainty of the related measurement of ca. 40%.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2010, 4, 2; 16-20
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Advanced multi-engine platform (AMP™) – a way to robust RTK
Autorzy:
Averin, Sergey
Plenkin, Andrey
Ignatev, Pavel
Vorobiev, Michael
Veitsel, Andrey
Powiązania:
https://bibliotekanauki.pl/articles/320719.pdf
Data publikacji:
2019
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
RTK
heading
tilt
receiver frontend
receiver digital section
Opis:
The paper describes the Advanced Multi-Engine Platform (AMP™) – Topcon’s patent pending technique, which is capable to improve RTK performance, based on the idea of running several RTK engines in parallel. The performance of AMP™ is dependent on Topcon receiver board, where it has been implemented, and the best results are achieved with B210 board. The main specifics of B210 is that it has two RF front-ends and a single digital section. Such an architecture allows for calculating heading and tilt within a single receiver board, and providing better RTK performance due to synergy of attitude determination and RTK solutions from two antennas, calculated within a single digital section. The paper describes specifics of B210 board along with mathematical aspects of AMP™ and its logic. The test results demonstrate noticeable improvements in RTK performance for B210 receiver board with AMP™, compared with the classical single-engine RTK approach.
Źródło:
Annual of Navigation; 2019, 26; 12-20
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of Ladle Tilting Speed for Preventing Temperature Drops in the Die Casting Process
Autorzy:
Ando, Haru
Minamide, Daichi
Takagi, Yuto
Yano, Ken’ichi
Nakamura, Naoto
Sano, Masahiro
Aoki, Takahiro
Nemoto, Yasunori
Powiązania:
https://bibliotekanauki.pl/articles/2172385.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
temperature drop
die casting
optimization
pouring
ladle tilt
Opis:
In die casting, molten metal poured into a shot sleeve is pressed into a mold by a plunger at high speed. The temperature of the metal drops significantly while it is being poured from the ladle to the shot sleeve, resulting in casting defects such as misrun flow lines. Although it is important to control the temperature at all stages of the process, a method for minimizing temperature loss has not yet been clarified to date. In this study, the cause of the temperature drop in the shot sleeve was clarified, and a method of optimizing the ladle tilting speed was proposed to prevent temperature drop. First, experiments were conducted to measure the decrease in metal temperature in the sleeve during pouring. These experiments revealed that the metal cools significantly from the moment it touches the shot sleeve. Therefore, the time from the first contact between the shot sleeve and the metal to the start of pouring was set as the objective function. A genetic algorithm was then used to derive the optimal ladle tilting speed pattern to suppress the temperature drop. This analysis confirmed that the metal was poured without flowing out or running ahead and that the immediate liquid level vibration after pouring was suppressed, thus ensuring stable pouring.
Źródło:
Journal of Casting & Materials Engineering; 2022, 6, 4; 69--75
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal site and antenna location for UMTS - output results of 3G network simulation software
Autorzy:
Nawrocki, M.J.
Więckowski, T.W.
Powiązania:
https://bibliotekanauki.pl/articles/309253.pdf
Data publikacji:
2003
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
anteny
UMTS
3G
CDMA
antenna tilt
site location
Opis:
The paper presents output results of 3G network simulation software in the area of optimal site location as well as finding optimal values of antenna tilt. The loss of capacity is shown for a wide range of tilts and different antenna directions. Nonuniform distribution of base stations has been also included in the simulation scenarios influencing system performance. All of the described parameters are especially significant to CDMA systems network planning.
Źródło:
Journal of Telecommunications and Information Technology; 2003, 1; 55-58
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal analysis of a gravity-assisted heat pipe working with zirconia-acetone nanofluids: An experimental assessment
Autorzy:
Abdolhossein Zadeh, Amin
Nakhjavani, Shima
Powiązania:
https://bibliotekanauki.pl/articles/240484.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
heat pipe
zirconia-acetone nanofluid
tilt angle
filling ratio
Opis:
An experimental investigation was performed on the thermal performance and heat transfer characteristics of acetone/zirconia nanofluid in a straight (rod) gravity-assisted heat pipe. The heat pipe was fabricated from copper with a diameter of 15 mm, evaporator-condenser length of 100 mm and adiabatic length of 50 mm. The zirconia-acetone nanofluid was prepared at 0.05–0.15% wt. Influence of heat flux applied to the evaporator, filling ratio, tilt angle and mass concentration of nanofluid on the heat transfer coefficient of heat pipe was investigated. Results showed that the use of nanofluid increases the heat transfer coefficient while decreasing the thermal resistance of the heat pipe. However, for the filling ratio and tilt angle values, the heat transfer coefficient initially increases with an increase in both. However, from a specific value, which was 0.65 for filling ratio and 60–65 deg for tilt angle, the heat transfer coefficient was suppressed. This was attributed to the limitation in the internal space of the heat pipe and also the accumulation of working fluid inside the bottom of the heat pipe due to the large tilt angle. Overall, zirconia-acetone showed a great potential to increase the thermal performance of the heat pipe.
Źródło:
Archives of Thermodynamics; 2020, 41, 2; 65-83
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual-axis test rig for Mems tilt sensors
Autorzy:
Łuczak, S.
Powiązania:
https://bibliotekanauki.pl/articles/220491.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
tilt sensor
accelerometer
MEMS
uncertainty of measurement
test rig
Opis:
The paper addresses the problem of experimental studies of miniature tilt sensors based on low-range accelerometers belonging to Microelectromechanical Systems (MEMS). A custom computer controlled test rig is proposed, whose kinematics allows an arbitrary tilt angle to be applied (i.e. its two components: pitch and roll over the full angular range). The related geometrical relationships are presented along with the respective uncertainties resulting from their application. Metrological features of the test rig are carefully evaluated and briefly discussed. Accuracy of the test rig is expressed in terms of the respective uncertainties, as recommended by ISO; its scope of application as well as the related limitations are indicated. Even though the test rig is mostly composed of standard devices, like rotation stages and incremental angle encoder, its performance can be compared with specialized certified machines that are very expensive. Exemplary results of experimental studies of MEMS accelerometers realized by means of the test rig are presented and briefly discussed. Few ways of improving performance of the test rig are proposed.
Źródło:
Metrology and Measurement Systems; 2014, 21, 2; 351-362
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selection of elastic suspension elements for the special use vehicle
Autorzy:
Borkowski, W.
Michalowski, B.
Paplinski, K.
Rybak, P.
Wysocki, J.
Powiązania:
https://bibliotekanauki.pl/articles/242198.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
special vehicle
suspension
spring
elastic element
lateral tilt stabilizer
Opis:
The work analyzes the possibility of using a truck chassis in terms of installing a specific device. As part ofwork was selected the vehicle, identified the necessary geometric parameters and the mass allowing of modernization, with particular emphasis on the required structural changes in the front and rear suspension. To this were used, the developed two phase methodology of calculation of the metal elastic elements (springs) and mechanical lateral tilt stabilizers. Results of numerical calculations are presented in the form of recommendations to redesign of the front and rear suspension. However, in the front suspension should be made a new spring and a mechanical lateral tilt stabilizer, while rear spring suspension meets the requirements in terms of elastic characteristics (adequate the coefficient of rigidity) is requiredonly adjustment of the static deflection of the suspension for example by adjusting the radii of leaf of the spring. Because of the design solution of the driving rear axle (so called driving axle trolley) was not proposed mechanical lateral tilt stabilizer. Paper present diagram of the forces acting on a vehicle with special equipment, results of the calculation loads acting on the suspension components fitted to a lorry with a special device, results of the calculation loads acting on the base vehicle suspension components, the basic parameters of a lorry with special hull and performance graph of the front suspension leaf spring resilience.
Źródło:
Journal of KONES; 2009, 16, 3; 47-54
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of heart rate variability during head-up tilt-test in patients with vasovagal syncope
Autorzy:
Budrejko, Szymon
Kempa, Maciej
Chmielecka, Monika
Kozłowski, Dariusz
Raczak, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/895735.pdf
Data publikacji:
2018-09-28
Wydawca:
Gdański Uniwersytet Medyczny
Tematy:
tilt table test
syncope
vasovagal syncope
heart rate variability
Opis:
Introduction: Syncope is defined as transient loss of consciousness, due to decrease in brain perfusion. The most frequent mechanism is vasovagal syncope. In many patients, the cause of syncope remains unspecified, despite an extensive diagnostic work-up. Tilt-test (TT) is an acknowledged diagnostic tool for syncope. Currently, the so-called Italian protocol of TT is most widely used. Vasovagal syncope is caused by impaired circulatory regulation in response to orthostatic stress. One of the available tools to examine the influence of the nervous system on the circulation is the analysis of heart rate variability (HRV). Despite numerous publications concerning HRV parameters and autonomic regulation in patients with syncope, direct comparisons and metaanalysis of the results is impossible, due to variability of TT protocols and study group specifications. Aim of the study: As there is no uniform model of HRV during TT, we aimed to analyze HRV parameters during TT (performed according to the Italian protocol) in patients with vasovagal syncope, in order to determine the possible application of HRV measurements in clinical practice in that group of patients. Detailed objectives were: (1) analysis and comparison of HRV in patients with and without the history of syncope; (2) analysis of HRV changes in consecutive stages of TT; (3) identification of possible HRV differences between patients with positive and negative TT results. Materials and methods: Patients between 18 and 50 years of age were qualified for the study, if they had a history of at least 2 incidents of syncope or presyncope within the preceeding 6 months, and if signs and symptoms indicated the vasovagal mechanism. The study group included 150 patients: 100 consecutive patients with a postive TT result (POS), and 50 consecutive patients with a negative TT result (NEG). The control group (CG) comprised 50 volunteers with no history of syncope nor presyncope, matched according to age and sex to the study group. In all patients a TT was performed according to the Italian protocol, with paced breathing at a rate of 15/min. Time-domain (meanRR, SDNN, RMSSD, pNN50) and frequency-domain (abs_LF, abs_HF, rel_LF, rel_HF, norm_LF, norm_HF, LF/HF) HRV parameters were analyzed and compared at different stages of TT in the study groups as specified above. Results: 100 patients at the age of 18-44 years were included in the POS group, 50 patients at the age of 18-39 years in the NEG group, and 50 volunteers at the age of 20-39 in the CG. Volunteers in the control group developed unexpectedly high percentage of positive TT (14 patients). For consistency of analysis, the CG was thus subdivided according to the result of the TT into CG_POS (positive result of TT) – 14 patients, and CG_NEG (negative result of TT) – 36 patients. Based on HRV analaysis, no significant differences in HRV values were noted between patients with a history of syncope and positive or negative result of TT. Upright tilt resulted in HRV changes of the same direction and value in syncopal patients in the POS and NEG goup, as well as in patients in the CG_NEG group. Conclusion: HRV values and changes of those values at subsequent stages of TT were not different between syncopal patients with postive or negative TT result, or negative TT control group. The Italian protocol of TT may be associated with a surprisingly high percentage of false positive results.
Źródło:
European Journal of Translational and Clinical Medicine; 2018, 1, 1; 26-38
2657-3148
2657-3156
Pojawia się w:
European Journal of Translational and Clinical Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wysoki poziom lęku u pacjentów, u których podejrzewano, ale wykluczono podejrzenie omdleń wazowagalnych
High anxiety level in patients with suspected but excluded vasovagal syncope
Autorzy:
Szewczuk-Bogusławska, Monika
Zyśko, Dorota
Kaczmarek, Małgorzata
Kumar Agrawal, Anil
Rudnicki, Jerzy
Gajek, Jacek
Federowski, Artur
Powiązania:
https://bibliotekanauki.pl/articles/470138.pdf
Data publikacji:
2012
Wydawca:
Europejskie Centrum Kształcenia Podyplomowego
Tematy:
omdlenia wazowagalne
test pochyleniowy
lęk
vasovagal syncope
tilt testing
anxiety
Opis:
Wstęp. Pacjenci kierowani na test pochyleniowy, u których wykluczono omdlenia wazowagalne, są grupą mało poznaną. Objawy zaburzeń lękowych i prodromalne objawy omdlenia wazowagalnego nakładają się na siebie, co może utrudniać rozpoznanie. Cel pracy. Ocena poziomu lęku w grupie młodych kobiet, u których na podstawie wywiadu i wyniku testu pochyleniowego wykluczono występowanie omdleń wazowagalnych. Materiał i metody. Grupa badana składała się z 14 kobiet, które pochodziły z grupy 55 kobiet kierowanych na test pochyleniowy w wieku 21–40 lat, u których na podstawie wywiadu i wyniku testu pochyleniowego wykluczono występowanie omdleń wazowagalnych. Przed wykonaniem testu pochyleniowego u badanych kobiet przeprowadzono badanie z użyciem kwestionariusza Spilbergera i oceniono poziom lęku jako stanu (KS1) i jako cechy (KS2). Grupę kontrolną stanowiły 124 kobiety, które zaprzeczały występowaniu omdleń w wywiadzie, które anomimowo wypełniły kwestionariusz Spilbergera oraz kwestionariusz dotyczący stanu zdrowia. Wyniki. Stwierdzono: 1) istotnie wyższy poziom lęku jako cechy i stanu (KS1 i KS2) w grupie badanej niż w grupie kontrolnej, 2) wartość poziomu lęku jako stanu (KS1) ponad 32 ze 100% czułością i 34,7% swoistością pozwala odróżnić pacjentów z grupy badanej od osób z grupy kontrolnej, 3) wartość poziomu lęku jako cechy (KS2) ponad 44 ze 64,3% czułością i 74,2% swoistością pozwala odróżnić pacjentów z grupy badanej od osób z grupy kontrolnej. Wnioski. 1. U około 20% pacjentek kierowanych na test pochyleniowy wykonanie badania i ocena zgłaszanych dolegliwości oraz reprodukcji objawów spontanicznych podczas testu pochyleniowego pozwala na wykluczenie omdleń wazowagalnych jako przyczyny zgłaszanych dolegliwości. 2. U pacjentek w grupie badanej stwierdza się wysoki poziom lęku jako cechy i jako stanu, co wskazuje na możliwość występowania zaburzeń lękowych jako podłoża zgłaszanych dolegliwości. 3. Wykluczenie rozpoznania omdleń wazowagalnych u młodych kobiet kierowanych z takim podejrzeniem na test pochyleniowy powinno zwrócić uwagę na możliwość występowaniu u nich zaburzeń lękowych.
Background. Patients referred for tilt test, who did not have vasovagal syncope are little known group. Symptoms of anxiety disorders and prodromal symptoms of vasovagal syncope overlap which can make it difficult to recognize. Objectives. The aim of the study is to assess the level of anxiety in a group of young women with excluded vasovagal syncope on the basis of medical history and tilt test results. Material and methods. The study group consisted of 14 women who came from a whole group of 55 women at the age of 21–40 years referred for tilt testing, who were excluded the presence of vasovagal syncope. Before performing the tilt test at the women were surveyed using a questionnaire Spielberg and rated the level of state anxiety (KS1) and the trait anxiety (KS2). Control group consisted of 124 women who had denied the occurrence of syncope. Results. 1. Results found significantly higher levels of trait anxiety and state anxiety (KS1 and KS2) in the study group than in the control group: 2. It was found that the value of the level of state anxiety (KS1) over 32 with 100% sensitivity and 34.7% specificity allows to distinguish case patients from the control group. 3. It was found that the value of the level of trait anxiety (KS2) over 44 with 64.3% sensitivity and 74.2% specificity allows to distinguish case patients from the control group. Conclusions. 1. Approximately 20% of patients referred for tilt testing have excluded vasovagal syncope as the cause of reported problems. 2. Patients in the study group found a high level of anxiety as a trait and as a state which indicates the possibility of anxiety as substrate of their complaints. 3. Exclusion of vasovagal syncope diagnosis in young women should pay attention to the possibility of the occurrence of anxiety disorders in them.
Źródło:
Współczesne Pielęgniarstwo i Ochrona Zdrowia; 2012, 3; 50-54
2084-4212
Pojawia się w:
Współczesne Pielęgniarstwo i Ochrona Zdrowia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tilt Angle of Wood Dust
Autorzy:
Ockajova, Alena
Banski, Adrian
Tomasz, Rogoziński
Powiązania:
https://bibliotekanauki.pl/articles/24072422.pdf
Data publikacji:
2023
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
wood dust
tilt angle
cleaning of dust
way of machining
Opis:
Tilt Angle of Wood Dust. The aim of this article is to point out a risk factor – wood dust, which settles on various structures, inclined surfaces in operation and, if not regularly cleaned, it is a source of secondary dust, because it is swirled up again with any movement. By measuring the tilt angle of bulk wood material obtained from sawing on a table circular saw, using different saw blades and wood dust from longitudinal and transverse sanding on a hand belt sander, we determined which characteristics affect it. We found that the size of the particles is an important characteristic, the larger they are, the smaller the tilt angle and also the surface of the pad on which the dust particles settle, wood did not play a significant role in this case. The smallest tilt angle was measured for sawdust from longitudinal sawing of 27°, and the largest tilt angle for wood dust from transverse sanding of oak and was 57° on beech pad.
Kąt nachylenia pyłu drzewnego. Celem tego artykułu jest zwrócenie uwagi na czynnik ryzyka - pył drzewny, który osadza się na różnych konstrukcjach, nachylonych powierzchniach podczas pracy. Jeśli nie jest regularnie usuwany, jest źródłem pyłu wtórnego, ponieważ jest ponownie zawirowywany przy każdym ruchu. Mierząc kąt pochylenia sypkiego materiału drzewnego uzyskanego z piłowania na stołowej pilarce tarczowej, przy użyciu różnych brzeszczotów i pyłu drzewnego ze szlifowania wzdłużnego i poprzecznego na ręcznej szlifierce taśmowej, ustaliliśmy, które cechy mają na to wpływ. Stwierdziliśmy, że rozmiar cząstek jest ważną cechą, im są one większe, tym mniejszy kąt pochylenia, a także powierzchnia podkładki, na której osadzają się cząstki pyłu, drewno nie odgrywało w tym przypadku znaczącej roli. Najmniejszy kąt pochylenia zmierzono dla trocin z piłowania wzdłużnego 27°, a największy kąt pochylenia dla pyłu drzewnego ze szlifowania poprzecznego dębu i wynosił 57° na podkładce bukowej.
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2023, 121; 37--42
1898-5912
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 33

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