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Manufacturing Process and Thermal Stability of Nanophotonic Soft Contact Lenses
No full textHydrogels have peculiar physical and chemical properties and therefore, are used in a variety of biomedical applications including drug delivery agents, prosthetic devices, the repair and replacement of soft tissues, contact lenses, etc. Consequently, investigation of mechanical, physical and chemical properties is crucial in biomedical application of hydrogels. Poly (2-hydroxyethyl methacrylate) (pHEMA), as a biocompatible hydrogel, was first hydrogel used for making soft contact lenses. Many researches have been modified pHEMA with the aim of improving its properties. Application of nanotechnology is one of the possible solutions for improving the characteristics of this biocompatible hydrogel. In this paper, polyhydroxyethyl methacrylate was used as standard material for soft contact lenses (SL 38). This material was incorporated with fullerene C-60 (SL38-A), fullerol C-60(OH)(24) (SL 38-B) and fullerene metformin hydroxylate C-60(OH)(12)(OC4N5H10)(12) (SL 38-C), respectively. Three new nanophotonic soft contact lenses were made. The main goal of this research was to develop appropriate process parameters for soft contact lens micro-turning. Also, studying the thermal decomposition of standard soft contact lens, pHEMA, as well as three new nanophotonic soft contact lenses was one of the main objectives. Results have shown that manufacturing process of nanofotonic soft contact lens is considered to be a micro-turning process regarding the cutting depth and tool nose ratio. Thermal stability of all three nanofotonic soft contact lenses was significantly improved comparing to the standard soft contact lens. Still, further research needs to be done so these nonophotonic soft contact lenses could find practical application in the field of biomedical engineering
Kompetencije nastavnika u primeni asistivne tehnologije
Get PDFАсистивне технологије обухватају средства и уређаје који се користе како би деца са сметњама у развоју и одрасли са инвалидитетом могли на лакши начин да изврше одређене задатке или жељене активности. Ови уређаји се крећу од нискотехнолошких до високотехнолошких уређаја и могу се користити у различитим областима живота. Једна од тих области је учење и школовање деце са сметњама у развоју, а важну улогу у овој области има наставничко знање о уређајима асистивне технологије и начинима њихове примене. Циљ овог рада био је испитати компетенције наставника и дефектолога за примену асистивних технологија у раду са децом са сметњама у развоју. Узорак је чинило 33 наставника и дефектолога Школе за основно и средње образовање „Антон Скала“ у Старој Пазови. За потребе истраживања коришћен је Упитник о знању
наставника и употреби асистивних технологија. Резултати истраживања показали су да
дефектолози у односу на наставнике више примењују асистивне технологије у свом раду, имају већу жељу за усавршавањем у овој области и имају позитивније ставове о употреби асистивних технологија.Assistive technologies include tools and devices that are used to help children and adults with disabilities to easily complete specific tasks or desired activities. These devices range from low- tech to high-tech devices and can be used in different areas of life. One of these areas is the learning and education of children with disabilities, and teachers' knowledge of assistive technology devices and ways of their application is an important role in this area. The goal was to examine the competences of teachers and special teachers in the application of assistive technologies in the work with children with disabilities. The sample consisted of 33 teachers and defectologists at the Anton Skala Elementary and Secondary School in Stara Pazova. The questionnaire on teacher knowledge and use of assistive technologies was used for research purposes. The results of the research showed that special teachers, more than teachers, use assistive technologies more in their work, have a greater desire for improvement in this field and have a more positive attitude about the use of assistive technologies
Clinical forms of alexia in patients with aphasia
Get PDFАфазија је мултимодални језички поремећај којим могу бити обухваћени сви језички модалитети: спонтани говор, аудитивно разумевање, именовање, понављање, читање и писање, гест и језичко мишљење (Вуковић, 2016). Циљ овог истраживања је да утврди способности читања и разумевања прочитаног код особа са афазијом.
Истраживањем је обухваћено укупно 15 испитаника, старостне доби од 50 до 76 година. Дијагноза афазија постављена је Бостонским дијагностичким тестом за афазије. Тестирање је спровођено у ,,Заводу за психофизиолошке поремећаје и говорну патологију „проф. др Цветко Брајовић“ у Београду. Након одређивања типа афазије, уследило је прикупљање података за потребе овог истраживања. За процену способности читања коришћени су: субтест читања речи, субтест читања реченца из Бостонског дијагностичког теста за афазје (БДАЕ) као и прича „Сељакови синови“.
Резултати овог истраживања су показали да код пацијената са афазијом постоје поремећаји способности читања и разумевања прочитаног као и да су поремећаји у корелацији са степеном тежине и типом афазије.Aphasia is a multimodal language impairment that can affect all of the language modalities: the speech, auditory comprehension, designation, repetition, reading and writing abilities, gesture and linguistic thinking (Vuković, 2016). The aim of this study is to determine Reading aloud and reading comprehension in patients with aphasia.
The study enveloped 16 respondents aged from 50 to 75 years. Aphasia was assessed using the Boston Diagnostic Aphasia Examination (BDAE). The study was carried out at the ''Institute for psychophysiological disorders and speech pathology 'PhD Cvetko Brajović' '' in Belgrade. What came after determining the type of aphasia was the data collection for the needs of this study.
For the evaluation (assessment) of the reading ability the following tests were used: subtest for oral reading of words, phrases from BDAE, as well as the story “Peasant’s sons“.
The results of this study show that people suffering from aphasia can have problems with reading and understanding words and phrases. Also those problems can corelate with type and severity of aphasia
Attitudes of parents of children with developmental disabilities about distance learning
Get PDFDuring the COVID-19 epidemic, distance
learning was implemented by all the
educational institutions in the Republic of Serbia. Due to the fact that children with disabilities were included in this type of learning, this research aimed to investigate
the experiences and attitudes of their parents towards distance learning. The research sampled 61 participants, and the research instrument consisted of the adjusted questions that the authors retrieved from the research previously done in China. The participants completed an online questionnaire, and the results were interpreted with descriptive and inferential statistics. According to the statistical analysis, the parents that spent more time on their children’s education than usual, as well as
parents with a higher level of education demonstrated more negative views on distance learning. Apart from that, their attitudes towards distance learning were negative in general, and the parents’ and
teachers’ interaction plays a significant role
in the parents’ satisfaction with distance learning. The results highlight the need for encouraging the interaction and cooperation between parents, school, and children in distance learning planning and organization while taking the specific needs of children with disabilities into consideration.U vreme epidemije virusa COVID-19 u Republici Srbiji organizovana je nasta- va na daljinu u svim obrazovnim ustanovama. Budući da su deca sa smetnjama u razvoju takođe bila uključena u ovaj vid nastave, cilj ovog istraživanja je bio da se ispitaju stavovi i iskustva njihovih roditelja sa nastavom na daljinu. U istraživanju je učestovao 61 ispitanik, a kao instrument autori su koristi- li prilagođenu verziju upitnika o stavovima roditelja o nastavi na daljinu, čija je originalna verzija primenjena u istraživanju sprovedenom u Kini. Ispitanicima je upitnik dodeljen u elektronskoj formi. Rezulati su obrađeni korišćenjem metoda deskriptivne i inferencijalne statistike. Kako je poka- zala statistička analiza, roditelji koji su više vremena provodili sa svojom decom u ispunjavanju školskih obaveza nego inače, kao i roditelji sa višim ste- penom obrazovanja imali su negativnije stavove o nastavi na daljinu. Takođe, pokazalo se da su stavovi roditelja prema nastavi na daljinu pretežno nega- tivni, kao i da interakcija roditelja sa nastavnicima igra značajnu ulogu u tome koliko su roditelji zadovoljni nastavom na daljinu. Ovakvi nalazi upućuju na to da je prilikom planiranja i organizacije nastave na daljinu nužno pod- sticati interakciju i saradnju roditelja, škola i ove dece, uzimajući u obzir njihove specifične potreb
A telemedical approach to the hearing assessment
Get PDFAlthough the idea of providing long-distance medical services dates
back to the middle of the last century, only the development of information
technology enabled the development of a different approach to the healthtelehealth.
Benefits such as speed, availability, reduced travel costs, available
expertise, real-time consultation, etc., greatly improve medical care. In many
fields of medicine, telehealth has replaced classical approaches and procedures
and has become the standard. The first applications of telehealth were in the
field of audiology in the form of long-distance hearing screening. This paper
describes an example of an online hearing test system. The system is based
on listening to speech in noise using the "Quick Speech in Noise Test" –
QuickSIN test. The criteria on the basis of which the system was implemented
are described: methodological and technological requirements, hardware and
software environment, procedure for forming a base of spoken material for
Serbian language and corresponding masking signals. There is a QuickSIN
test for adults and for children. For this occasion, QuickSIN test for adults
will be described as the first triage test for distant hearing testing that does
not require special environmental conditions. As the test is sensitive and
easily accessible, it can be of great help in detecting initial levels of hearing
impairment and thus a significant help in preventing severe damage.Iako ideja o pružanju medicinskih usluga na daljinu datira od sre- dine prošlog veka, tek je zahvaljujući razvoju informacionih tehno- logija omogućen drugačiji pristup medicinskoj zaštiti pod nazivom telehealth. Prednosti kao što su brzina, dostupnost, smanjenje troško- va putovanja, raspoloživo ekspertsko znanje, mogućnost konsultacija u realnom vremenu i druge, visoko unapređuju medicinsku zaštitu. U mno- gim oblastima medicine telehealth je zamenio klasične pristupe i pro- cedure i postao je standard. Prve primene telehealth-a bile su u oblasti audiologije i to u formi skrininga sluha na daljinu. U radu je opisan pri- mer sistema za proveru kvaliteta sluha putem interneta. Sistem je zasnovan na slušanju govora u buci primenom „Quick Speech in Noise Test” – QiuckSIN test. Opisani su kriterijumi na osnovu kojih je realizovan sistem: metodološki i tehnološki zahtevi, hardversko-softversko okruženje, postupak formiranja baze govornog materijala za srpski jezik i odgovarajućih maskirajućih signala. Postoji QiuckSIN test za odrasle i za decu. Za ovu priliku biće opisan QiuckSIN test za odrasle kao prvi trijažni test za distalnu proveru sluha čije korišćenje ne zahteva specijalne uslove okruženja. Kako je test osetljiv i lako dostupan on može biti od velike koristi u detekciji početnih nivoa oštećenja sluha a time i značajna pomoć u prevenciji nastanka težih oštećenja
Achievements on the numeracy screener in children From Serbia and Canada
Get PDFThe objective of the survey was to verify the hypothesis that children from
Serbia and children from Canada differ in their results on the Numeracy
Screener test (NST) that correlates with the arithmetic competences of
elementary school children.
We sampled 105 subjects aged by 8.10 - 9.58, where the group from Serbia
included all 27 pupils of a third-grade class from an elementary school in
Belgrade and the group from Canada consisted of 78 third-grade pupils
from an elementary school from southern Ontario. By applying the NST test
(symbolic and non-symbolic subtests), the basic mathematical competences of
children were examined.
Statistically significant differences were found in favor of the examinees
from Serbia on the symbolic subtest, whereas in the results of the nonsymbolic
subtest no differences were found between the examinees. Also,
within the Serbian sample, no differences were found between girls and boys
of the applied instrument.
We recommend that future research strive to validate the NST on a larger,
and heterogeneous samples of the same-aged children from rural and urban
milieus in Serbia, using the following criteria: non-verbal IQ, student’s marks
from all teaching subjects during the current school year, evaluation scales for
teachers, questionnaires for the parents and the results of the final math test.Cilj istraživanja je provera hipoteze da se deca iz Srbije i deca iz Kanade, razlikuju u postignućima na Numeričkom skrining testu (NST) koji korelira sa aritmetičkim kompetencijama dece u osnovnoj školi. Ukupan uzorak činilo je 105 subjekata starosti između 8,10 i 9,58 godina, pri čemu je grupa iz Srbije obuhvatala 27 učenika trećeg razreda osnovne škole u Beogradu a grupa iz Kanade, 78 učenika trećeg razreda osnovne škole u Ontariju. NST testom ispitane su bazične matema- tičke kompetencije dece u obe zemlje. Utvrđeno je da postoje statistički značajne razlike u postignući- ma na simboličkom subtestu NST testa između ispitanika iz Srbije i ispitanika iz Kanade u korist ispitanika iz Srbije, da ne postoje razlike u postignućima ovih ispitanika na nesimboličkom subtestu i da na uzorku ispitanika iz Srbije, ne postoje razlike u postignućima između dečaka i devojčica, na obe subskale primenjenog instrumenta. Preporuka za dalja istraživanja je validiranje primenjenog instru- menta na većim reprezentativnim i heterogenim uzorcima dece istog uzrasta iz naše populacije, uzimajući u obzir sledeće kriterijume za validiranje: neverbalni IQ, ocene učenika iz svih školskih predmeta tekuće godine, skale procene za učitelja, upitnika za roditelje i rezul- tata zaključnog testa iz matematike
Sports in children with special look at deaf Students in Serbia
Get PDFSocial care for persons with disabilities, which is a necessity in modern
societies must be regulated legally and organizationally, but also based on a
scientific basis, constantly checked and continuously upgraded.
Sport is a form of cultural activities of man in society in order to detect
motor skills of people and in terms of competitiveness. An important trend
in the development of physical culture and sports is its universality, and
the desire to sport attract all segments of the population, including people
with disabilities. Therefore, physical culture and sport are the social sphere
of society and to ensure proper formation and development of the physical
characteristics and motor abilities of each person.
Our work aims to show and explain opportunities for sport at a young
age, with special emphasis on school sports and competitions held for deaf
children in the Republic of Serbia.Društvena briga o osobama sa invaliditetom je nužnost koja u mo- dernim društvima mora biti pravno i organizaciono regulisana, ali i na naučnim osnovama zasnovana, neprestano proveravana i permanent- no unapređivana. Sport predstavlja jedan od oblika kulturne aktivnosti čoveka u društvu u cilju otkrivanja motoričkih sposobnosti ljudi i u smis- lu konkurentnosti. Važan trend u razvoju fizičke kulture i sporta predstavlja njegova univerzalnost, i želja da se sportu privuku svi segmenti stanovništva, između ostalih i osobe sa invaliditetom. Zato fizička kultura i sport predstavljaju socijalnu sferu društva i obezbeđuju pravilno formiranje i razvoj fizičkih osobina kao i moto- ričkih sposobnosti svakog čoveka. Naš rad ima za cilj da pokaže i objasni mogućnosti za bavljenjem sportom na mlađem uzrastu, a poseban akcenat je dat na školski sport i takmičenja koja se održavaju za gluvu decu u Republici Srbiji
Early identification of children with developmental delay and behavioural problems according to parents concerns in the Republic of Serbia
Get PDFThe main goal of this research was to describe the type and level of parents' concerns about child development and behaviour according to the PEDS test (Parents' Evaluation of Developmental Status). The sample included 289 parents of children from three to seven years of age, from two preschool institutions in Serbia. A significantly high correlation was determined between parents' general concerns and expressed concerns with regard to behaviour ((2)=17.86, df=2, p lt .001) and getting along with others ((2)=22.57, df=2, p lt .000). A marginally significant correlation was determined between parents' general concerns and manifested concerns with regard to fine motor skills ((2)=5.90, df=2, p=.052), as well as expressive language ((2)=5.858, df=2, p=.053). According to the criteria of PEDS test, this research identified 56.4% of children whose development needed to be monitored, 27.7% of children who needed to be referred for detailed diagnostic procedures, and 1.7% who needed to be included in treatment or special education support.This is the peer‐reviewed version of the article: Ilić, S. B.; Nikolić, S. J.; Ilić-Stošović, D. D.; Golubović, Š. S. Early Identification of Children with Developmental Delay and Behavioural Problems According to Parents Concerns in the Republic of Serbia. Early Child Development and Care 2020, 190 (16), 2605–2611. [https://doi.org/10.1080/03004430.2019.1595610
Lexical-semantic processing of nouns in preschool children
Get PDFThe aim of the study is to determine the characteristics of lexical-semantic processing of nouns in children aged five and a half to seven years. The sample consists of 60 children, of which 30 (50%) are boys and 30 (50%) are girls. In relation to age, the sample of children is divided into three age groups with an age interval of six months. In order to research lexical-semantic abilities, the Test of speech development-Testofword definitions and the Semantic test were applied.
The results of the study show that preschool children most often produce functional definitions (31%), while the literary and descriptive definitions (18%), as well as logical definitions (17%) are almostequally represented in the answers ofchildren.
When analyzing the results of semantic abilities, itwas found that children achieve the best performance on the antonyms task, while the lowest achievement was accomplished within the synonyms task. Only on the antonyms taskstatistically significant differences were identified in achievement between the youngest and middle-aged group, in favor of older children (p < 0.05).
Boys and girls show similar tendencies in development of different abilities, measured by overall performance on all tasks, as indicated by the absence of interaction between age and sex factors (p > 0.05).
The importance of children's vocabulary development and its impact on school performance has been the subject of many studies. A well-developed vocabulary in children is part of their language competence and contributes to development of adequate communication skills, therefore, the linguistic indicators we used in our study representa significant indicator oflexical-semantic development