55 research outputs found
Documentary film and ethics: child on screen ("Alone" by Audrius Stonys)
No full text„Filmas, atvedęs prie etinės problemos,“ - rašoma juostos „Viena“ (2001) pristatyme Audriaus Stonio tinklalapyje*. Režisierius jau buvo sukūręs devynis dokumentinius filmus, pirmąjį „Atverti duris ateinančiam“ - daugiau kaip prieš dešimtmetį, tačiau tik dešimtasis, paties autoriaus žodžiais tariant, atvedė jį prie etinės problemos, įrašytos pirmu sakiniu anotacijoje. Yra pagrindo manyti, jog dėl to „kaltas“ vaikas ekrane - šešerių metų filmo herojė Sigita. Šio straipsnio dėmesio centre - etikos klausimai, filmuojant vaikus, ir galimi etinių problemų sprendimo būdai, pasitelkiant Stonio filmą „Viena“ kaip pavyzdį ir svarstymų pagrindą, pasirenkant dekonstrukcinę prieigą bei lyginamosios analizės metodą ir vertinant filmo recepciją Lietuvoje bei užsienyje. Reikšminiai žodžiai: Audrius Stonys; Dokumentika; Etika; Filmas „Viena"; Lietuvių kinas; Režisierius Audrius Stonys; Vaikai; Vaikas; Audrius Stonys; Children; Documentary; Ethics; Film "Viena" ("One"); Film director Audrius Stonys; Lithuanian cinema; Movie „Alone""The film brought me up to an ethical issue," writes Audrius Stonys on his website introducing the documentary 'Alone' (2001). The director had already made nine documentaries (the first of which, 'Opening the Door for the One Who Is Coming’ being created over a decade ago), yet only the tenth one, according to its author, brought him up to an ethical issue, which is stated in the first sentence of its annotation. Presumably, this is because of the child appearing on screen, namely, the six-year-old character of the film Sigita. This article focuses on ethical issues related to capturing children on screen, and possible ways of solving the ethical problems. The documentary 'Alone' by Stonys serves as an example and a subject of consideration; the author employs the deconstructive approach and method of comparative analysis, evaluating the reception of this documentary both in Lithuania and abroad
Neatsakymų vertinimas įmonių tyrimuose
No full textThere is not abstract.Šiame darbe buvo palyginti skirtingi atsakymo į apklausą tikimybių vertinimo būdai. Paprastasis persvėrimo, eksponentinis ir logistinės regresijos metodai buvo naudojami norint gauti sumų įverčius, kai į apklausą atsako ne visi į imtį išrinkti elementai. Atsakymų į apklausą lygiai panašūs į stebimus realiuose įmonių tyrimuose
Įvairiasluoksnių kvartero nuogulų šilumos perdavimo modelis ir šilumos laidumo parametrų vertinimas vertikaliais šilumos kolektoriais.
No full textThe growing need for low-energy or 'green' buildings and the commitments from the European Union are encouraging the use of renewable energy from 17% to 30% in 2030. The potential of shallow geothermal energy has not been studied by researchers because of no qualitative scientific in-situ thermal response test reference data sets. The qualitative borehole heat exchanger analysis could be performed while the hydrodynamic and thermal parameters of the rocks are determined by the laboratory experiments. The advanced particle swarm optimization algorithm is effectively applied to evaluate the thermal conductivity parameters of rocks. The heat transfer simulation was performed using different analytical g-functions. Stability conditions for the TRT experiment have been established to ensure the accuracy of the thermal parameter estimates. The uncertainty of parameters was performed to obtain the effects on stability and accuracy of thermal parameter estimates. The borehole heat transfer analysis was established for multi-layered Lithuanian Quaternary sediments, incorporating parameters of porosity, groundwater filtration and hydraulic gradient characteristic of the surrounding Visoriai area. An impact analysis was performed on the average temperature of the circulating fluid, changing the hydrodynamic parameters of the multilayer Quaternary sedimentscolumn. The thesis presents an expert analysis of TRT experimental equipment produced in Lithuania following confidentiality agreements
The Borehole Heat Transfer Model Performance Analysis in the Multilayer Quaternary Sediments and Evaluation of Thermal Parameters Using Vertical Borehole Exchangers.
No full textThe growing need for low-energy or 'green' buildings and the commitments from the European Union are encouraging the use of renewable energy from 17% to 30% in 2030. The potential of shallow geothermal energy has not been studied by researchers because of no qualitative scientific in-situ thermal response test reference data sets. The qualitative borehole heat exchanger analysis could be performed while the hydrodynamic and thermal parameters of the rocks are determined by the laboratory experiments. The advanced particle swarm optimization algorithm is effectively applied to evaluate the thermal conductivity parameters of rocks. The heat transfer simulation was performed using different analytical g-functions. Stability conditions for the TRT experiment have been established to ensure the accuracy of the thermal parameter estimates. The uncertainty of experiments parameters was performed to obtain the effects on the stability and accuracy of thermal parameter estimates. The borehole heat transfer analysis was established for multi-layered Lithuanian Quaternary sediments, incorporating parameters of porosity, groundwater filtration and hydraulic gradient characteristic of the surrounding Visoriai area. An impact analysis was performed on the average temperature of the circulating fluid, changing the hydrodynamic parameters of the multilayer quaternary sediment column. The thesis presents an expert analysis of TRT experimental equipment produced in Lithuania following confidentiality agreements
First-principles calculations of defects and electron-phonon interactions: Seminal contributions of Audrius Alkauskas to the understanding of recombination processes
No full textFirst-principles calculations of defects and electron-phonon interactions play a critical role in the design and optimization of materials for electronic and optoelectronic devices. The late Audrius Alkauskas made seminal contributions to developing rigorous first-principles methodologies for the computation of defects and electron-phonon interactions, especially in the context of understanding the fundamental mechanisms of carrier recombination in semiconductors. Alkauskas was also a pioneer in the field of quantum defects, helping to build a first-principles understanding of the prototype nitrogen-vacancy center in diamond, as well as identifying novel defects. Here, we describe the important contributions made by Alkauskas and his collaborators and outline fruitful research directions that Alkauskas would have been keen to pursue. Audrius Alkauskas' scientific achievements and insights highlighted in this article will inspire and guide future developments and advances in the field. (c) 2024 Author(s).CSE
Vertikalių kolektorių šilumos modeliavimas radialinėmis bazinėmis funkcijomis: praktininis taikymas
No full textIn this work, the method of radial basis function (RBF) is used for the borehole heat exchanger transfers (BHET) problems. The RBF method is an efficient mesh free technique for the numerical solution of partial differential equations. The condition number of the system of linear equations (matrix A) is large it means that the ill-conditioning of matrix A makes the numerical solution unstable. Tikhonov regularization (TR) method are presented to solve such ill-conditioned systems. In this work, generalized cross-validation (GCV) method is carried out to determine the regularization parameter ksi for the TR method that minimizes the GCV function. The some practical results of numerical experiments are presented.
Šiame tyrime yra taikomas radialinių bazinių funkcijų metodas (RBF) vertikaliems kolektoriams, analizuojant šilumos perdavimo problematiką. RBF metodas yra ekonomiškas betinklis metodas sprendžiant diferencialines lygtis. Lygčių sistemos (matrica A) sąlyginis skaičius yra dažnai didelis, todėl matrica A metodas yra taikomas šiai problemai eliminuoti, gautas apibendrintu abipusio palyginimo metodu (GCV) gaunamas regularizacijos parametras ksi TR metodui, minimizuojant GCV funkciją. Rezultatuose pateiktos kelios rekomendacijos.
 
Indoor-Guided Navigation for People Who Are Blind: Crowdsourcing for Route Mapping and Assistance
No full textThis paper presents an approach to enhance electronic traveling aids (ETAs) for people who are blind and severely visually impaired (BSVI) using indoor orientation and guided navigation by employing social outsourcing of indoor route mapping and assistance processes. This type of approach is necessary because GPS does not work well, and infrastructural investments are absent or too costly to install for indoor navigation. Our approach proposes the prior outsourcing of vision-based recordings of indoor routes from an online network of seeing volunteers, who gather and constantly update a web cloud database of indoor routes using specialized sensory equipment and web services. Computational intelligence-based algorithms process sensory data and prepare them for BSVI usage. In this way, people who are BSVI can obtain ready-to-use access to the indoor routes database. This type of service has not previously been offered in such a setting. Specialized wearable sensory ETA equipment, depth cameras, smartphones, computer vision algorithms, tactile and audio interfaces, and computational intelligence algorithms are employed for that matter. The integration of semantic data of points of interest (such as stairs, doors, WC, entrances/exits) and evacuation schemes could make the proposed approach even more attractive to BVSI users. Presented approach crowdsources volunteers’ real-time online help for complex navigational situations using a mobile app, a live video stream from BSVI wearable cameras, and digitalized maps of buildings’ evacuation schemes
Occupancy Prediction Using Differential Evolution Online Sequential Extreme Learning Machine Model
No full textDespite increasing energy efficiency requirements, the full potential of energy efficiency is still unlocked; many buildings in the EU tend to consume more energy than predicted. Gathering data and developing models to predict occupants’ behaviour is seen as the next frontier in sustainable design. Measurements in the analysed open-space office showed accordingly 3.5 and 2.7 times lower occupancy compared to the ones given by DesignBuilder’s and EN 16798-1. This proves that proposed occupancy patterns are only suitable for typical open-space offices. The results of the previous studies and proposed occupancy prediction models have limited applications and limited accuracies. In this paper, the hybrid differential evolution online sequential extreme learning machine (DE-OSELM) model was applied for building occupants’ presence prediction in open-space office. The model was not previously applied in this area of research. It was found that prediction using experimentally gained indoor and outdoor parameters for the whole analysed period resulted in a correlation coefficient R2 = 0.72. The best correlation was found with indoor CO2 concentration—R2 = 0.71 for the analysed period. It was concluded that a 4 week measurement period was sufficient for the prediction of the building’s occupancy and that DE-OSELM is a fast and reliable model suitable for this purpose.This article belongs to the Section Sustainable EnergyThis research was funded by a grant (No. S-MIP-20-62) from the Research Council of Lithuania
Estimation of the vertical borehole thermal parameters based on the evolution algorithm using temperature response functions
No full textThe vertical borehole ground heat exchange performance is still the issue for the engineers installing vertical borehole ground plants using ground-coupled heat pumps. Besides geological and climate change challenges, they face the extraordinary heat transfer process between the circulating fluid and the ground surrounding the U-tube and interactions of vertical boreholes. This paper describes the technique to evaluate the grout, soil thermal parameters and borehole thermal resistance simultaneously using the particle swarm optimization algorithm. The reference thermal response data set from the sandbox laboratory was used for the analysis. A thermal response test (TRT) was made, including the different temperature response functions, for a few time scales. The estimates and errors of the grout, soil thermal conductivity and borehole resistivity were presented and compared with the results of the laboratory experiment and researchers. The target functions, in our case root mean square error values, were less than 0.034 for all analysis cases. The calculation algorithm was written using the Matlab 2016 program and could be easily expanded by increasing the number of target functions and evaluation algorithms. The presented TRT data analysis will increase the knowledge about the vertical borehole ground heat exchange design
The nursing needs of hospital patients undergoing the amputation of limbs.
No full textThe author of work: Rimantienė Aušra Title:The nursing needs of hospital patients undergoing the amputation of limbs The tutor of work: Gradauskas Audrius, docent The Vilnius University Institute of Rehabilitation, Sports Medicine and Nursing Lithuania 2008-05-14 Number of pages 74 The number of amputations remains large in Lithuania. Nursing after amputations is of great importance, because the subsequent aftercare and life quality depends on the nursing quality. The nursing care after amputations is insufficient due to a great number of psychological, rehabilitation, disability problems as well as needs for care, which are important in present day practice and nursing science. The aim of this work is to assess needs for nursing care of patients with amputated lower extremities in hospital settings. The objectives of the work: To determine expectations, specifics of nursing care and problems of patients after amputations; to investigate, whether the cause of amputation influences patient' needs and the quality of life, to evalaute nurse's atitude and expectations towards nursing care of patiens after amputations. METHODS The objectives of the survey – problems, nursing needs, and expectations of selected patients, experiencing amputation of lower extremities as well as the attitude of nurses to the nursing care of such patients. Questionnaires and analyses of statistical data were chosen as methods of the survey. 82 patients with amputated lower extremities participated in the inquiry. The respondents were questioned at the Vilnius University Hospital and at the Traumatological Department of the Vilnius University Emergency Hospital. 61 general practice nurses, working at the Vascular Surgery Centre of Vilnius University Hospital, at the Surgery Clinic and at the Orthopaedics Traumatological Unit of the Vilnius University Emergency Hospital, participated in the inquiry. 64 histories of diseases of patients with amputated lower extremities were analysed. The online database was used for the work; the statistical analysis was carried out by SPSS 12 h online program. CONCLUSIONS The needs of patients after amputations are physical, psychological and social, particularly for patients, with amputated lower extremities due to frostbites and chilblains, because in most cases they do not possess permanent shelter. Nursing needs of patients with amputated lower extremities are satisfied only partially because the information on care peculiarities of amputated patients is insufficient for a majority of nurses, whereas the patients expect a greater individual attention and personal contacts. The complex assistance is necessary for patients, because the hospitalisation period is prolonged. The intolerance to amputated patients belittles nursing needs. A great number of amputations due to frostbites could be avoided if social services would pay greater attention to the homeless people
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