Estimation of vibration in Klaipeda powdery manure discharge terminal

In contemporary life the mechanization of industrial and agricultural production, increasing traffic flows in towns and settlements, and modernization of household technologies result in the expansion of vibration and noise areas. This is in particular experienced by the industrial enterprise staff, vehicle drivers, passengers and others. Vibration affects the nervous system, blood circulation, tissues and does other kinds of harm to human health. The impact on humans depends on a distance to a vibration source, material whereby vibration spreads, and the duration and velocity of vibration. The spread of vibration together with noise significantly increases the impact of vibration. Noise and vibration problems are encountered in seaport discharge terminals as well. The investigation of vibration in the bulk fertilizer terminal of Klaipeda Stevedoring Company as well as obtained findings were compared to permissible values specified in the Lithuanian Hygiene Norms. The investigation showed the highest vibration acceleration levels inside the terminal, where they varied from 0,4 to 3,2 m/s2, and outdoors, by the fertilizer discharge terminal, on the paving, where they varied from 0,0005 to 0,0042 m/s2 (at 1–16 Hz frequency). Vibracijos vertinimas Klaipėdos biriųjų trąšų iškrovimo terminale Santrauka Nūdienos gyvenime, mechanizavus pramonės ir žemės ūkio gamybą, didėjant transporto srautams miestuose ir gyvenvietėse, modernėjant buitinei technikai, sparčiai didėja vibracijos bei triukšmo keliamo diskomforto zonos. Ypač su tuo susiduria pramonės įmonių darbuotojai, transporto priemonių vairuotojai, jų keleiviai ir kt. Vibracija veikia nervų sistemą, kraujo apytaką, audinius ir kitaip kenkia sveikatai. Vibracijos poveikis žmogui priklauso nuo atstumo iki jos židinio, medžiagos, kuria vibracija sklinda, vibracijos trukmės ir sklidimo spartos. Kai vibracija sklinda kartu su triukšmu, jos poveikis žymiai didesnis. Su triukšmo bei vibracijos problemomis susiduriama ir jūrų uostų krovinių stotyse. Vibracijos tyrimai atlikti Klaipėdos jūrų krovinių kompanijos biriųjų trąšų terminale. Gauti rezultatai palyginti su Lietuvos higienos normose pateiktais leistinaisiais dydžiais. Tyrimų metu didžiausi vibracijos pagreičio lygiai terminalo viduje kito nuo 0,4 iki 3,2 m/s2 , o lauke, prie trąšų iškrovimo terminalo, ant grindinio, – nuo 0,0005 iki 0,0042 m/s2 (esant 1–16 Hz dažniams). Reikšminiai žodžiai: vibracija, vibracijos pagreitis, vibruojantys įrenginiai, iškrovimo terminalas, vibracijos lygiai. Оценка вибраций в клайпедском терминале по разгрузке порошкообразных удобрений Резюме В настоящее время в связи с механизацией промышленного и сельскохозяйственного производства, увеличением транспортных потоков в городах и населенных пунктах, а также совершенствованием бытовой техники из-за вызываемого ими шума и вибраций быстрыми темпами увеличиваются дискомфортные зоны. Особенно часто в таких зонах приходится находиться работникам промышленных предприятий, водителям транспортных средств, их пассажирам и др. Вибрация отрицательно сказывается на здоровье человека: его нервной системе, кровообращении, тканях. Воздействие вибрации на человека зависит от расстояния до ее источника, материала, по которому распространяется вибрация, продолжительности и частоты распространения вибрации. В случае, когда вибрация распространяется вместе с шумом, ее воздействие увеличивается. С проблемами шума и вибрации сталкиваются также работники станций по разгрузке грузов в морских портах. Исследование вибраций проводилось в терминале по разгрузке порошкообразных удобрений в Клайпедской компании морских грузов. Полученные результаты сравнены с величинами, допустимыми литовскими гигиеническими нормами. Во время исследований наибольшие уровни скоростей вибраций внутри терминала колебались от 0,4 м/с 2 до 3,2 м/с2 , а на открытом месте выгрузки удобрений – от 0,0005 м/с 2 до 0,0042 м/с 2 (при частоте 1–16 герц). Ключевые слова: вибрация, ускорение вибрации, вибрирующие установки, терминал по разгрузке, уровни вибрации. Firstd Published Online: 14 Oct 201

Production of He-4 and (4) in Pb-Pb collisions at root(NN)-N-S=2.76 TeV at the LHC

Results on the production of He-4 and (4) nuclei in Pb-Pb collisions at root(NN)-N-S = 2.76 TeV in the rapidity range vertical bar y vertical bar <1, using the ALICE detector, are presented in this paper. The rapidity densities corresponding to 0-10% central events are found to be dN/dy4(He) = (0.8 +/- 0.4 (stat) +/- 0.3 (syst)) x 10(-6) and dN/dy4 = (1.1 +/- 0.4 (stat) +/- 0.2 (syst)) x 10(-6), respectively. This is in agreement with the statistical thermal model expectation assuming the same chemical freeze-out temperature (T-chem = 156 MeV) as for light hadrons. The measured ratio of (4)/He-4 is 1.4 +/- 0.8 (stat) +/- 0.5 (syst). (C) 2018 Published by Elsevier B.V.Peer reviewe

Identification schemes based on error-correcting codes

The study looks into the theory of coding and identification, zero-knowledge identification protocols are discussed. A more in depth look is taken into Stern, Veron and Harari identification schemes. These schemes are interpreted with programs. The forementioned programs are tested against each other by checking their processing times, division of tasks between claimer and verifier, amount of data sent

High frequency filtering of 24-hour heart rate data

Heart rate (HR) and its variability (HRV) analysis based on spectral methods have been widely applied for assessment of autonomic nervous system activities. However, an observation of existing frequency dynamic in particular spectral bands of HRV, especially when analysis is done in short time RR interval series, is problematic using these methods. We used self-developed digital filters to solve this problem. The high-frequency (HF; 0.15-0.4 Hz) band of RR intervals is filtered with 3 finite (FIR) and 4 infinite impulse response (IIR) filters from original 24-hour HR record. We showed that the use of various filters for identification of respiration influence on HR. An analysis using FIR filters gives more accurate results, but requires more calculation resources. No differences between results obtained using filtering and spectral analysis were observed. The use of FIR and IIR filters are simple and effective for processing of both, 24-hour data and short-time series of RR intervals

High frequency filtering of 24-hour heart rate data

Heart rate (HR) and its variability (HRV) analysis based on spectral methods have been widely applied for assessment of autonomic nervous system activities. However, an observation of existing frequency dynamic in particular spectral bands of HRV, especially when analysis is done in short time RR interval series, is problematic using these methods. We used self-developed digital filters to solve this problem. The high-frequency (HF; 0.15-0.4 Hz) band of RR intervals is filtered with 3 finite (FIR) and 4 infinite impulse response (IIR) filters from original 24-hour HR record. We showed that the use of various filters for identification of respiration influence on HR. An analysis using FIR filters gives more accurate results, but requires more calculation resources. No differences between results obtained using filtering and spectral analysis were observed. The use of FIR and IIR filters are simple and effective for processing of both, 24-hour data and short-time series of RR intervals

Monopolar electrocautery use in minimally invasive urosurgery: Case report of ectopic ureter management in a bitch

Background: Ureteral ectopy is a congenital anomaly, affecting young dogs, predominantly bitches. The main complication of the disease is urinary incontinence, which leads to low life quality for both animals and their owners. However, only two less invasive surgical management options are reported. Laser ablation is quite popular, while monopolar electrocautery use is very rare.Case Description: A 3-month and 1-week-old, 1.7 kg female Poodle was admitted to the Vetamicus clinic with severe urinary incontinence and moisture-associated dermatitis. After diagnosing intramural ectopy type during computed tomography scan and video cystoscopy, a search for surgical management options began. We proceeded with the monopolar cauterization technique, where a semirigid Karl Storz monopolar coagulating ball electrode is used to cut a mucous membrane partition between the ureter and urinary bladder. No complications occurred during or after the surgery. Ureter successfully healed and full continence was achieved together with sporadically using phenylpropanolamine syrup.Conclusion: The present case indicates that monopolar electrocautery use in intramural ectopy type management and possibly other urinary tract pathologies might be strongly beneficial

Daily heart rate variability indices in subjects with and without metabolic syndrome before and after the elimination of the influence of day‐time physical activity

Background and Objectives: The available research shows conflicting data on the heart rate variability (HRV) in metabolic syndrome (MetS) subjects. The discrepancy suggests a methodical shortcoming: due to the influence of physical activity, the standard measuring of HRV at rest is not comparable with HRV assessment based on 24h Holter monitoring, which is preferred because of its comprehensiveness. To obtain a more reliable measure and to clarify to what extent HRV is altered in MetS, we assessed a 24h HRV before and after the elimination of the influence of physical activity. Materials and Methods: We investigated 69 metabolic syndrome (MetS) and 37 control subjects, aged 50–55. In all subjects, 24h monitoring of electrocardiogram, blood pressure, and actigraphy profiles were conducted. To eliminate the influence of day-time physical activity on RR intervals (RRI), a linear polynomial autoregressive model with exogenous terms (ARX) was used. Standard spectral RRI analysis was performed. Results: Subjects with MetS had blunted HRV; the diurnal SDNN index was reliably lower in the MetS group than in control subjects. The elimination of the influence of physical activity did not reveal a significant HRV change in long-term indices (SDNN, SDANN, and SD2), whilst adjacent RRI values (RMSSD, pNN50, and SD1) and SDNN index significantly increased (p < 0.001). An increase in the latter indices highlighted the HRV difference between the MetS and control groups; a significant (p < 0.001) decrease of all short-term HRV variables was found in the MetS group (p < 0.01), and low-frequency spectral components were less pronounced in the MetS group. Conclusion: The application of a polynomial autoregressive model in 24h HRV assessment allowed for the exclusion of the influence of physical activity and revealed that MetS is associated with blunted HRV, which reflects mitigated parasympathetic tone

A Novel Adaptive Noise Elimination Algorithm in Long RR Interval Sequences for Heart Rate Variability Analysis

As heart rate variability (HRV) studies become more and more prevalent in clinical practice, one of the most common and significant causes of errors is associated with distorted RR interval (RRI) data acquisition. The nature of such artifacts can be both mechanical as well as software based. Various currently used noise elimination in RRI sequences methods use filtering algorithms that eliminate artifacts without taking into account the fact that the whole RRI sequence time cannot be shortened or lengthened. Keeping that in mind, we aimed to develop an artifacts elimination algorithm suited to long-term (hours or days) sequences that does not affect the overall structure of the RRI sequence and does not alter the duration of data registration. An original adaptive smart time series step-by-step analysis and statistical verification methods were used. The adaptive algorithm was designed to maximize the reconstruction of the heart-rate structure and is suitable for use, especially in polygraphy. The authors submit the scheme and program for use

Problem-Based Learning versus Traditional Learning in Physics Education for Engineering Program Students

Problem-based learning (PBL) is an educational method which involves learning by solving real problems. However, applying a PBL approach to engineering subjects in some cases became a challenging issue. Thus, it is important to determine the best ways in which engineering students can learn physics more effectively and solve problems relevant to their daily lives. The main aim of this study was to compare the final assessment grades in a physics course for students in the engineering program using PBL and traditional learning (TL) methods. The advantages and disadvantages of PBL and TL methods from the practical experience of lecturers are also presented. The study presented data of 460 first-year engineering students taking the physics course at Kaunas University of Technology. The information presented in this study is based on the insights, observations, and individual experiences of the authors as teaching staff. The results indicated that the application of the PBL method allows for enhancement in the teamwork, presentation, and critical thinking skills in physics. However, the TL method promotes the individual learning skills and wider theoretical knowledge in physics of students and is more suitable when the exam only includes closed-ended questions