The first aim of our research is to calculate the solar irradiance on roofs assuming clear sky and real (climatologically typical) conditions, respectively, and compare them in a densely built inner city study area in Szeged (Hungary). The second aim is to analyse the shading effect of the tree-crowns on the possible solar energy gain of building roofs. The calculation of the climatologically potential solar energy gain based on an empirical atmospheric transmittance (calculated from the measured global radiation values). The results show that in the case of clear sky condition the urban vegetation (tree-crowns) causes significant potential solar energy loss on the roofs, but in the real situations this effect is less significant. These obtained results clearly illustrate how useful tool could be the presented calculation method at the economical and technical planning stage of the installation of solar systems on roofs.
This paper presents a thermal comfort study of a popular playground in Szeged, Hungary in order to find its optimal land cover and vegetation options. For this assessment simulated micro- and bioclimatological conditions recorded on a typical summer day (12th July 2011) were analysed. The thermal and radiation features of the study area were quantified by two biometeorological indices, Predicted Mean Vote (PMV) and Mean Radiant Temperature (Tmrt). For the simulation of the meteorological parameters and the bioclimate indices, ENVI-met microclimate model was used. The results confirmed that the modelled areas with different land cover provide a variety of thermal conditions for the visitors; moreover, human thermal sensation was significantly affected by the change of the radiation environment.
Authors:J. Gál, Cs. Jakab, B. Balogh, T. Tóth, and B. Farkas
The occurrence of a periosteal chondroma (juxtacortical chondroma) in an adult male
is documented for the first time. The chondroma developed near the right shoulder joint from the periosteal membrane, causing partial atrophy in the surrounding skeletal muscles. In the chondroma tissues widespread central necrosis and secondary calcium salt deposition were observed. Monomorphic chondrocytes were irregularly spread in the chondromucin matrix. The lizard had locomotor problems due to irritation of the periosteum and reduced movement of the bones constituting the shoulder joint caused by the chondroma.
Authors:T. Breuer, E. Sápi, I. L. Hartyánszky, Zs. Cserép, P. Vargha, A. Treszl, M. D. Kertai, J. Gál, M. Tóth, A. Szatmári, and Andrea Székely
Objective: To investigate the associations of blood glucose (BG) parameters and postoperative complications following paediatric cardiac surgery in the presence and absence of insulin treatment.
Methods: Prospectively collected perioperative data on 810 consecutive patients who underwent surgery for congenital heart disease were retrospectively analysed. A combined outcome of death and multiple organ dysfunction (any two of the followings: infectious, cardiac, pulmonary, renal or neurological complications) was considered as the endpoint.
Results: In total, 110 patients developed the combined endpoint and 32 of these patients died during the perioperative period. Patients treated with insulin were younger, smaller and underwent more complex procedures. They had higher peak BG levels and higher daily BG fluctuation, however, BG parameters were not associated with adverse outcome. In patients without insulin treatment, peak BG values higher than 250 mg/dl (OR, 7.65; 95% CI, 1.06–55.17; p=0.043) and BG fluctuation exceeding the level of 150 mg/dl (10.72; 1.74–65.90 p=0.010) on the first postoperative day were independently associated with the combined endpoint.
Conclusions: Peak BG level and BG fluctuation on the first postoperative day were associated with the combined endpoint of complications and death but these results were only confined to patients without insulin treatment.