Pastato termofizinių savybių modeliavimas naudojant „Simulink“

Šildant pastatus ne tik užtikrinamas komfortas, bet ir energetiškai teršiama aplinka, o gaminant kurą teršiama atmosfera. Šildymui mažiau sunaudojant energijos sutaupoma lėšų ir mažinama tarša. Pasiūlytas pastato šiluminio balanso modelis leidžia įvertinti įvairių veiksnių (atitvarų šiluminė varža, oro infiltracijos greitis, katilo galingumas, šildymo sistemos valdymo algoritmai ir t. t.) įtaką pastato šildymui sunaudojamos energijos kiekiui. Pateikiami modeliavimo rezultatai.Modeling thermo-physical properties of building using “Simulik”Antanas Mikuckas, Irena Mikuckienė, Egidijus Kazanavičius, Jonas Čeponis SummaryVarious models are used to study heat dynamics in buildings for evaluating heating energy consumption. This paper deals with model allowing to simulate thermal transients depending on the geometrical characteristics and thermo-physical properties of building components (exterior walls, internal partitions ceilings, floors and windows), external temperature variations and properties of heating system. The results for residential house are shown. The heat consumption for a specified time period was calculated. The heating energy conservation methods are analyzed and compared

Kompiuterizuoto būsto šiluminio balanso modeliavimas naudojant MATLAB

Labai svarbu, kad šildymo sistema ne tik garantuotų komfortą, bet ir būtų ekonomiška. Šildymo sistemos ekonomiškumas priklauso ne tik nuo jos valdymo algoritmų, bet ir nuo radiatorių galingumo paskirstymo patalpose. Pasiūlytas pastato šiluminio balanso modelis, realizuotas naudojant MATLAB įrankį „Simulink“, leidžia analizuoti procesus šildymo sistemoje ir optimaliai paskirstyti šildymo elementų galingumą atskirose patalpose. Pateikiami modeliavimo rezultatai ir išvados.Smart House Heat Balance Modeling Using MATLABAntanas Mikuckas, Irena Mikuckienė, Egidijus Kazanavičius, Jonas Čeponis SummaryThe purpose of heating system is to create the best environment possible and to minimize energy consumption. Energy consumption in heating system depends not only on control algorithms of heating system, but also on power of heating units’ distribution. Heat balance model was developed using MATLAB. This model allows fi nding out optimal distribution of heating elements power. The results for residential house are shown. The heat consumption for a specifi ed time period was calculated.ight: 18px;">&nbsp

Association of reproductive health with anthropometry, metabolic and psychological parameters in young and middle-aged men

Associations between androgens and various metabolic factors, as well as cardiovascular morbidity shown in recent epidemiological studies sparked interest in new aspects of male reproductive health. Reference values for normal androgen levels in Lithuanian population have not yet been established and no relationship studies on reproductive health and anthropometric, as well as metabolic parameters have been performed. Unequivocal information on associations among the aforementioned factors is lacking globally, especially those performed in homogenous populations. More information on androgen associations with cognitive function, emotional state and evaluation of quality of life is required. Most of the studies on effectiveness of testosterone replacement therapy were of short duration and mostly focused on structural, rather than functional parameters. The purpose of the study was to describe associations between reproductive health and anthropometric, metabolic, as well as psychological parameters in young and middle-aged men. This is the largest androgen association analysis in Lithuanian population. This work seeks for systematic responses to questions of interest: to establish reference values for normal and optimal androgen levels, to evaluate their relationship with anthropometric and metabolic factors in populations that are homogenous by age, and to assess the functional changes that long-term optimal testosterone replacement therapy may induce in patients with androgen deficiency

The Effect of physiotherapy in addition to testosterone replacement therapy on the efficiency of the motor system in men with hypogonadism

Background and Objective. The aim of this study was to analyze whether the addition of physiotherapy to testosterone replacement therapy provides added benefit in improving functional capacity of the motor system in men with hypogonadism. Material and Methods. The study involved 3 groups of subjects: group 1, healthy men (n=20); group 2, men with hypogonadism who underwent testosterone replacement therapy with physiotherapy (TRT+PT) (n=8); and group 3, men with hypogonadism who underwent testosterone replacement therapy alone (TRT) (n=10). Physical activity (International Physical Activity Questionnaire [IPAQ]) and body composition (X-SCAN analysis) were analyzed; the vertical jump test (Leonardo Mechanography®) was applied. Results. The application of testosterone replacement therapy together with physiotherapy for 6 months significantly increased the maximum and relative power of jump in the subjects in the TRT+PT group; however, in the TRT group, no statistically significant difference was observed. The maximum jump height for the subjects in the TRT+PT group significantly increased 6 months after the intervention; however, in the TRT group, this index remained unaltered. The lean body mass of the subjects in the TRT+PT group increased (P<0.05); however, in the TRT group, it did not change. The relative fat body mass in the TRT+PT group decreased significantly (P<0.05), but, in the TRT group, it had a tendency to increase, though insignificantly. Conclusions. Our results suggest that the application of testosterone replacement therapy together with physiotherapy (1 hour twice weekly) in men with hypogonadism may lead to earlier and better results in comparison with testosterone replacement therapy applied alone

The Effect of physiotherapy in addition to testosterone replacement therapy on the efficiency of the motor system in men with hypogonadism

Background and Objective. The aim of this study was to analyze whether the addition of physiotherapy to testosterone replacement therapy provides added benefit in improving functional capacity of the motor system in men with hypogonadism. Material and Methods. The study involved 3 groups of subjects: group 1, healthy men (n=20); group 2, men with hypogonadism who underwent testosterone replacement therapy with physiotherapy (TRT+PT) (n=8); and group 3, men with hypogonadism who underwent testosterone replacement therapy alone (TRT) (n=10). Physical activity (International Physical Activity Questionnaire [IPAQ]) and body composition (X-SCAN analysis) were analyzed; the vertical jump test (Leonardo Mechanography®) was applied. Results. The application of testosterone replacement therapy together with physiotherapy for 6 months significantly increased the maximum and relative power of jump in the subjects in the TRT+PT group; however, in the TRT group, no statistically significant difference was observed. The maximum jump height for the subjects in the TRT+PT group significantly increased 6 months after the intervention; however, in the TRT group, this index remained unaltered. The lean body mass of the subjects in the TRT+PT group increased (P<0.05); however, in the TRT group, it did not change. The relative fat body mass in the TRT+PT group decreased significantly (P<0.05), but, in the TRT group, it had a tendency to increase, though insignificantly. Conclusions. Our results suggest that the application of testosterone replacement therapy together with physiotherapy (1 hour twice weekly) in men with hypogonadism may lead to earlier and better results in comparison with testosterone replacement therapy applied alone

Diabetic vascular damage: review of pathogenesis and possible evaluation technologies

Diabetes mellitus (DM) is a rapidly increasing problem in health care worldwide: recent forecast indicates that the number of DM patients will rise to 640 million by 2040. Vascular damage is associated with severe complications, including cardiac neuropathy and limb amputation. Therefore, early prediction of diabetic vascular damage using advanced technologies is an important challenge because timely preventive and therapeutic measures could diminish the risk of development and burden of complications. The aim of the article is to provide a review of the initial stages of vascular damage and main mechanisms for development, as well as appropriate modern technologies for prediction and diagnosis. The manuscript provides an overview of interrelated vascular damage mechanisms influenced by diabetes, along with a review of possible technologies for early prediction and diagnosis. A comparative analysis of technologies appropriate for particular issues of prediction is summarised in the discussion