Comparative review of the sequential analysis and other models for evaluating school classes

U ovom radu imamo za cilj da uporedimo i prikažemo prednosti postupka sekvencijalne analize (Ivić, Pešikan, Antić 2001) u odnosu na druge iz literature poznate instrumente za psihološko-didaktičku analizu časa. U instrumente sa kojima poredimo sekvencijalnu analizu uvrstili smo sledeće: Flanders Interaction Analysis Categories (Flanders 1970), Mesner-Fuglisterova skala (Mesner, Fuglister 1973), ETH Wiss - 92 instrument (Educational Development and Technology, 2007) i CLASS sistem (Pianta, La Paro, Hamre 2007). Rad se sastoji iz dva dela. U prvom delu rada predstavljamo odabrane instrumente, dok u drugom delu ove instrumente poredimo na osnovu četiri kriterijuma - odnos između instrumenta kao istraživačke tehnike i nastave kao predmeta analize, priroda jedinice za analizu školskog časa, sadržaj jedinice za analizu školskog časa, postupak globalne procene časa.The goal of this paper is to highlight the advantages of the sequential analysis (Ivić, Pešikan, Antić 2001) compared to other existing instruments for psychological-didactical analysis of school classes-Flanders' Interaction Analysis Categories (Flanders 1970), Füglister-Messner scale (Füglister, Messner 1973), ETH Wiss-92 instrument (Educational Development and Technology 2007) and CLASS system (Pianta, La Paro, Hamre 2007). The paper consists of two parts. In the first part the aforementioned methods are presented, while in the second these methods are compared on the basis of four criteria-the relationship between the instrument as a research technique and teaching as the object of the analysis; the nature of the smallest element of a school class analysis; the content of the smallest element of a school class; the procedure of the global evaluation of a class. The conducted analyses allow us to put the sequential analysis on one side and the other evaluative instruments on the other, as two different categories of evaluative instruments. The sequential analysis is in both technical and practical sense conceived in such a way that preserves the psychological essence of teaching as a process based on interaction. On the other side, the other instruments represent analytical procedures that reduce psychological and didactic value of the evaluation of a class. Therefore these instruments and their results do not have sufficient theoretical and practical value when it comes to psychological-didactical evaluation of school classes

Scardinius knezevici Bianco & Kottelat, 2005 and Alburnus scoranza Bonaparte, 1845: New species of ichthyofauna of Serbia and the Danube basin

Research into the ichthyofauna of the Vlasina Lake reservoir in south Serbia, which is part of the Danube basin, was carried out in 1993, 40 years after its formation. The results of the research reveal the presence of several species of fish belonging to the Adriatic and Aegean basin, such as Alburnus albidus, Rutilus basak, Scardinius graecus and Pachychilon macedonicus. These findings are of great importance from the aspect of conservation, because the species Scardinius graecus and Alburnus albidus are on the European list of endangered fish species. In the latest study of the Vlasina Lake reservoir ichthyofauna (70 years after its formation), the above-mentioned species were not found. However, the presence of naturalized populations of two species from the Adriatic basin were confirmed: Scardinius knezevici and Alburnus scoranza. These findings represent the first known areal expansion of these species, which are new to the ichthyofauna of Serbia, from the Adriatic into the Danube (Black Sea) basin.[Acknowledgments. The present work was supported by the Ministry of Education and Science of the Republic of Serbia (Projects No. 43002 and 173025).

Non-oncological drug-induced blood disorders: a cost of illness study using the microcosting Methodology - study plan [protocol]

Drug-induced disorder „can result from unanticipated or anticipated drug effects“ (1). The prevalence of hematological adverse drug reactions (ADR) in chemotherapeutics is expected to be high; for non-chemotherapeutics, there is insufficient epidemiological data, although a spontaneous reporting system is mandatory in a drug's life cycle (2-6). ADR is considered to be the fifth cause of death, with the hospitalization rate caused by ADR estimated to be between 0.9-7.9% (7-8), while one study suggests that about „10 to 20% of hospitalized patients will experience ADRs during their stay“ (9). Frequency data on hospital admissions due to hematological ADR vary between studies, e.g., 9% (7) up to 26.5% (10). The study by Abu et al. categorized major ADR types based on system disorders, where hematologic ADR encountered 9.9-15.2% of ADRs (9). The same study estimated costs per ADR from 65.00 to 12,129.90 USD, whereas costs were generally lower when the micro- costing approach was used (9). A cost-of-illness (COI) study should be performed to precisely determine the costs generated by ADR. COI studies measure the economic burden of an illness on society, health insurance funds, or patients. Jefferson et al. (2000) defined “the aim of COI studies is descriptive: to itemize, value, and sum the costs of a particular problem with the aim of giving an idea of its economic burden“ (11). There are different methods of conducting this type of study, such as prevalence‐based, incidence‐based, or econometric approaches, with again different approaches (e.g., prospective, retrospective; top-down, bottom-up…) or with different perspectives of COI studies (such as societal, health care system, third-party payer) (11). However, micro-costing studies represent the gold standard for conducting COI studies (12). Only a few cost drivers of HADR have been proven to date, e.g., prolonged in-hospital stay, costs of using drugs, and transfusion costs (13-14).STUDY PLA

Hydrodynamics of a self-agitated draft tube airlift reactor

The main hydrodynamic characteristics of a novel-constructed, self-agitated draft tube airlift reactor (DT-ALR) were investigated. Ten impellers, driven only by the means of gas throughput and induced liquid circulation, were inserted in the draft tube. The insertion of impellers caused bubble breakup and reduction of both mean bubble size and coalescence, even under the conditions of high gas throughputs. Although the impellers induced energy losses, the resistance to the flow was relatively lower due to their rotation, unlike the internals used in other research reported in the literature. In comparison to the conventional configuration of a DT-ALR, it was found that the presence of impellers led to significant changes in hydrodynamics: riser gas holdup and mixing time increased, while overall gas holdup and liquid velocity in the downcomer decreased. [Projekat Ministarstva nauke Republike Srbije, br. 172025

Spectral parameters for finger tapping quantification

A miniature inertial sensor placed on fingertip of index finger while performing finger tapping test can be used for an objective quantification of finger tapping motion. Temporal and spatial parameters such as cadence, tapping duration, and tapping angle can be extracted for detailed analysis. However, the mentioned parameters, although intuitive and simple to interpret, do not always provide all the necessary information regarding the subject's motor performance. Analysis of frequency content of the finger tapping movement can provide crucial information about the patient's condition. In this paper, we present parameters extracted from spectral analysis that we found to be significant for finger tapping assessment. With these parameters, tapping's intra-variability, movement smoothness and anomalies that may occur within the tapping performance can be detected and described, providing significant information for further diagnostics and monitoring progress of the disease or response to therapy

Impact of depression on gait variability in Parkinson's disease

Objective The goal of this study was to analyze how depression associated with Parkinson’s disease (PD) affected gait variability in these patients using a dual-task paradigm. Additionally, the dependency of the executive functions and the impact of depression on gait variability were analyzed. Patients and Methods Three subject groups were included: patients with PD, but no depression (PD-NonDep; 14 patients), patients with both PD and depression (PD-Dep; 16 patients) and healthy controls (HC; 15 subjects). Gait was recorded using the wireless sensors. The participants walked under four conditions: single-task, motor dual- task, cognitive dual-task, and combined dual-task. Variability of stride length, stride duration, and swing time was calculated and analyzed using the statistical methods. Results Variability of stride duration and stride length were not significantly different between PD-Dep and PD-NonDep patients. The linear mixed model showed that swing time variability was statistically significantly higher in PD-Dep patients compared to controls (p = 0.001). Hamilton Disease Rating Scale scores were significantly correlated with the swing time variability (p = 0.01). Variability of all three parameters of gait was significantly higher while performing combined or cognitive task and this effect was more pronounced in PD-Dep group of patients. Conclusions Depression in PD was associated with swing time variability, and this effect was more prominent while performing a dual-task. Significance Diagnosing and treating depression might be important for gait improvement and fall reduction in PD patients

GXRD analysis of TiN coatings deposited on ion implanted stainless steel

Nitrogen ion implantations were performed on AISI 1045 steel substrates. The ion energy was 40 keV and the ion doses were from 5x1016 – 5x1017 ions cm-2. On such substrates we have deposited 1.3 μm thick TiN coatings. Structural characterizations were performed by grazing incidence X-ray diffraction analysis (GXRD), normal X-ray diffraction analysis (XRD), and scanning electron microscopy (SEM). Microhardness was measured by Vicker`s method. The obtained results indicate that the formation of iron nitrides occurred in the near surface region of the substrates. This effect is more pronounced for higher implantation doses. Structure of the deposited TiN coatings shows a dependence on the implanted doses. Ion implantation and deposition of hard TiN coatings induce an increase of microhardness of this low performance steel for more than eight times.YUCOMAT 2006 : 8th Annual Conference YUCOMAT 2006 : Septembar 4-8, Herceg Novi, 2006

Greenhouse gas emission from the rare earth metals electrolysis

In the present work, we investigated the off-gas emission during the Nd and Pr electrodeposition from oxy- fluoride melts by the in-situ FTIR-spectrometry to understand the nature of the reactions taking place on the anode and the mechanisms behind them

Risk factors for severe dental anxiety among medical students

Background/Aim. Severe dental anxiety (SDA) is the most severe form of dental anxiety, thus the aim of this study was to determine the factors associated with SDA in students of health-related disciplines. Methods. In this case-control study the cases were students with severe dental anxiety. The study was conducted at the Faculty of Medical Sciences, University of Kragujevac, Serbia. The participants were undergraduate students attending lectures during spring semester 2010/2011 (n = 1,812). A random sample of 800 students was assessed for the association between various risk factors and the severe dental anxiety. The main outcome measures were the data on demographics, dental anxiety, habits concerning oral hygiene, nutrition, general anxiety and (co)morbidity which were collected from the study participants by semi-structured questionnaire. Results. Less frequent visits to the dentist (OR adjusted = 7.02 [2.65; 18.60]) and visiting the dentist only when there is a dental problem (OR adjusted = 8.08 [1.28; 50.93]) were associated with severe dental anxiety. The same was true for improper oral hygiene (OR adjusted = 4.25 [1.16; 15.60]). Factors as changing toothbrush more frequently (OR adjusted = 0.33 [0.14; 0.76]) and having chronic disease (OR adjusted = 0.01 [0.00; 0.09]) were inversely associated with severe dental anxiety. The level of education of students was not associated with severe dental anxiety. Conclusion. Inappropriate oral hygiene, less frequent changes of a toothbrush and less frequent visits to the dentist are important risk factors for severe dental anxiety. [Projekat Ministarstva nauke Republike Srbije, br. 175007

Radio-sensitivity of human melanoma, ovarian and lung carcinoma cells to gamma radiation

Radio-sensitivity of human melanoma, ovarian and lung cancer cells after the exposure to gamma-rays was studied using three different methods. The results showed that gamma rays reduce the number of viable cells for all analyzed cell lines. However, these cells display high level of radio-resistance. The highest radio-sensitivity was attained for the CRL5876 lung cells, while the most sensitive assay was the clonogenic assay