bluuebunny/crossref_metadata_2025_split huggingface dataset:
Uzamsal Becerilerin Geliştirilmesi İçin Üç Boyut İçerikli Etkileşimli Videoların Kullanılabilirliğine Yönelik Bir İnceleme
Authors: ÇALIŞKAN Erkan , GÖKÇE Semirhan , ÖNAL Nezih 
Published: June 2019

Bu çalışmanın temel amacı
geometrik cisimlere yönelik hazırlanan etkileşimli videoların öğrencilerin
uzamsal becerilerinin geliştirilmesi için kullanılabilirliğinin incelenmesidir.
Bu amaç doğrultusunda (1) İnternet ortamında yayınlanan ve güncel web
tarayıcıları tarafından görüntülenebilen etkileşimli videoların nasıl
geliştirilebileceğinin aktarılması, (2) Milli Eğitim Bakanlığı ilköğretim
matematik öğretim programındaki geometrik cisimler alt öğrenme alanındaki
kazanımlarına uygun olarak geliştirilen etkileşimli ortamın Nielsen’in
sezgiselleriyle alan uzmanları tarafından incelenmesi ve (3) bu tür videoların
geometri öğretimde kullanılabilirliğine yönelik görüşlerin sunulması
hedeflenmiştir. Keşfedici araştırma yönteminde yürütülen çalışmada geliştirmeye
yönelik süreç sonu uzman temelli değerlendirme gerçekleştirilmiştir. Buna göre,
matematik eğitimi alan uzmanları tarafından videonun kullanılabilirliğinin
belirlenmesi adına Nielsen sezgisellerinden yararlanılarak sezgisel
değerlendirme yapılmıştır. Öğretim elemanlarıyla inceleme sonunda yapılan
görüşmeler ile elde edilen veriler nitel olarak çözümlenerek Nielsen
sezgiselleri ile eşleştirilmiştir. Etkileşimli videonun öğretim sürecine ve
öğrenciye sağlayacağı katkılar açısından elde edilen kodlar, tema ve
kategorilerde toparlanarak sunulmuştur. Değerlendirme sonunda öğretim
elemanları geometri öğretiminde öğrencilerin uzamsal becerilerinin gelişimine
yönelik tasarlanan etkileşimli videoyu kullanılabilir bulmuşlar ve bu tür
videoların geliştirilmesine yönelik olumlu tutum sergilemişlerdir. Gelecekte
geometrik cisimlere yönelik geliştirilecek etkileşimli videolarda
kullanıcıların tanıdık oldukları ortam ve arayüzlerin kullanılması, videolarda
soru tabanlı etkileşimlere yer verilmesi ve vidoların günlük hayat ile
ilişkilendirilmesi önerilmektedir.
Physics Teachers’ Assessment Preferences and Difficulties They Experience Related to Performance Based Assessment
Authors: TANUĞUR Bekir , OGAN BEKİROĞLU Feral 
Published: June 2019

The purpose of this research
was to determine physics teachers’ assessment methods and their frequency use,
criteria they take into account to grade students’ performances, and cognitive
levels they consider while assessing student learning. Identification of
difficulties that physics teachers have related to performance-based assessment
was also the aim of this research. Survey research design was carried out.
Participants were the physics teachers working in 61 high schools in the
Anatolian side of Istanbul. Some of the conclusions are as follows: Physics
teachers do not only consider where their students are according to performance
goals but also value students’ affective domain such as effort and attitude in
order to give grades to their students. While physics teachers use traditional methods such as
exam more often, they also implement performance assessment and portfolio. Physics teachers have various difficulties
related to their qualifications, curriculum and university entrance exam in
preparing, implementing, and evaluating performance-based assessment methods.
Basamaklı Öğretim Yönteminin Öğrencilerin Bilişsel Öğrenme Düzeylerine Etkisi
Authors: YILDIRIM YAKAR Züleyha , ALBAYRAK Mustafa 
Published: June 2019

Bu araştırmanın amacı;
matematik dersinde uygulanan Basamaklı Öğretim Yönteminin (BÖY) öğrencilerin
bilişsel öğrenme düzeylerine etkisini incelemektir. Araştırmanın katılımcıları,
bir devlet ortaokulunda öğrenim gören 107 altıncı sınıf öğrencisidir.
Araştırmada sontest kontrol gruplu deneysel desen kullanılmıştır. Alan ölçme
konusu 4 hafta süreyle deney grubunda BÖY’e dayalı olarak, kontrol-1 ve
kontrol-2 gruplarında ise düz anlatım ve soru-cevap yöntemleri kullanılarak
işlenmiştir. Tüm gruplara deneysel işlem sonrasında araştırmacı tarafından
geliştirilen Bilişsel Öğrenme Düzeyi Testi sontest olarak uygulanmıştır. Elde
edilen bulgulara göre, BÖY’ün anlama ve kavrama basamaklarını içeren1.bilişsel
seviyede ve analiz etme, değerlendirme ve yaratma basamaklarını içeren
3.bilişsel seviyede düz anlatım ve soru-cevap yöntemlerine göre daha etkili
olduğu belirlenmiştir. Deney, kontrol-1 ve kontrol-2 gruplarının uygulama
basamağının yer aldığı 2. bilişsel seviye puanlarında ise anlamlı farklılık
tespit edilmemiştir.
Approximate Bayes Estimation for Log-Dagum Distribution
Authors: TANIŞ Caner , ÇOKBARLI Merve , SARAÇOĞLU Buğra 
Published: June 2019

In this article, the approximate Bayes estimation
problem for the log-Dagum distribution with three parameters is considered.
Firstly, the maximum likelihood estimators and asymptotic confidence intervals
based on these estimators for unknown parameters of log-Dagum distribution are
constructed. In addition, approximate
Bayes estimators under squared error loss function for unknown parameters of
this distribution are obtained using Tierney and Kadane approximation. A
Monte-Carlo simulation study is performed to compare performances of maximum
likelihood and approximate Bayes estimators in terms of mean square errrors and
biases. Finally, real data analysis for this distribution is performed.
Antimutagenic and Multi-Biological Activities of Smilax excelsa L. Fruit Extract
Authors: EFE Ecehan , YALÇIN Emine , ÇAVUŞOĞLU Kültiğin 
Published: June 2019

In this study, antimutagenic, antimicrobial and antioxidant activities
of Smilax excelsa L. fruit extract
were evaluated. The antimicrobial effect
was investigated by disk diffusion method and the antimutagenic effect was
investigated by Ames/Salmonella/microsom test. The antioxidant properties of S.
excelsa fruit samples were determined by investigating the total phenolic,
flavonoid contents and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical
scavenging activity. It was observed
that 200 mg plate-1 fruit extract was found to have a mutagenicity
inhibition as 81% in the absence of S9 mixture and 67% in the presence of S9
mixture against Salmonella typhimurium
TA1535. S. excelsa fruit extract
produced an inhibition zone in the range of 11-16 cm against the tested
microorganisms. Flavonoid and phenolic contents were found to be 0.7985±0.0124
mgQE 100 mL-1 and 11.9847±0.0041 mgGAE 100 mL-1 at the
200 mg mL-1 extract concentration, respectively. The DPPH removal
rate was determined to be 55% at the 200 mg L-1 dose. As a result,
it was observed that the S. excelsa fruit
tissues exhibited a highly antimutagenic activity and has been determined as a
potential natural antimicrobial and antioxidant source.
Interval-Valued Fuzzy Parameterized Intuitionistic Fuzzy Soft Sets and Their Applications
Authors: KAMACI Hüseyin 
Published: June 2019

In recent years, the fuzzy sets, interval-valued fuzzy
sets, intuitionistic fuzzy sets and soft sets, which offer different
perspectives for the structures containing the uncertainties, have attracted
the interest of many researchers. Also, the intuitionistic fuzzy soft sets
produced by combining the intuitionistic fuzzy sets with the soft sets have
been widely studied. In this work, the concept of interval-valued fuzzy
parameterized intuitionistic fuzzy soft set (IVFPIFS set) is introduced. This
set is the generalization of soft sets, fuzzy soft sets, fuzzy parameterized
(fuzzy) soft sets, interval-valued fuzzy parameterized (fuzzy) soft sets,
intuitionistic fuzzy soft sets and fuzzy parameterized intuitionistic fuzzy
soft sets. For the IVFPIFS sets, basic operations such as complement, union and
intersection are defined. Also, the
properties of these operations are investigated in detail. Lastly, an algorithm
by using the aggregation operators based on the IVFPIFS sets is constructed.
The examples are given to verify the feasibility and validity of the proposed
algorithm.
Determination of Dangerous Parts of the Energy Transmission Line by the Canopy Height Model Produced from LiDAR Data
Authors: BAŞ Nuray 
Published: June 2019

LiDAR (Light Detection and Ranging) technique is preferable method to determine vertical
metric values of High Voltage Transmission
Lines (HVTL) in global regions and steep land. The importance of these
facilities is increasing day by day because of the necessity of electricity
energy in our daily life. Determination
of vertical heights is an important problem especially in forested areas
after construction. In this study, metric values of vegetation which violate
vertical safety limits under voltage wires were determined by using Canopy
Height Model (CHM) using LiDAR data. As a study area 450x150 m2 was
selected the existing voltage line in the region between Beykoz District and
Çekmeköy located on the Anatolian side of Istanbul. Firstly, it has been made
conductive classification of HVTL that is using LiDAR classification
techniques. Also it is determined the
dangerous limits of trees and vegetation in HVTL vertical oscillation. As a
result the comparison of the values of the vertical elevation with the local methods and obtained from the LiDAR data yielded a Root
Mean Square Error (RMSE) value of 0.36m was found.
Clinical Analyses of Efficiency of Multicomponental, Vitreoretinal Surgery of Eye Trauma
Authors: Aliev A.-G. D. , Aliev A. A.-G. , Abdulaev A. B. , Nurudinov M. M. 
Published: June 2019

Eye trauma is one of the leading causes of blindness and low vision in young working age people. It gives this particular group of diseases a special social significance. The absence of a universal surgical treating tactic is explained by the variety of traumatic agents and the various types of injuries. Penetrating wounds with the introduction of a foreign body, accompanied by detachment of the retina, vascular membrane, hemorrhagic and infectious complications are the most difficult in the clinical plan.Material and methods: 103 with penetrating eye injuries were operated during the period from 2015 to 2017. 29 of them were involving the introduction of foreign bodies, which were removed at different times: 18 eyes (62 %) — at 7–10 days, 8 eyes 27.5 %) — 14–28 days after injury and 3 eyes (10.3 %) — more than 1 month. In all cases, subtotal vitrectomy 25G (68.9 %) was performed, in some cases, 23-hedge vitrectomy was preferred (31 %) due to pronounced fibro-proliferative changes in the vitreous body. In the case of a foreign body impacted into the shells with dimensions greater than 4 mm, the real cavity was tamped with PFOS.Results. The adherence of the detached retina was achieved in 14 cases, adherence of the choroid — 4 cases. Uveitis was observed in 5 cases, ophthalmic hypertension in 12 patients in the early postoperative period. Hypertension was compensated by using the antihypertensive regimen. 5 patients at the time of hospitalization had a Vis = 0, the operation was of a diaphragm-preserving nature, since a foreign body that was not removed was the cause of the development of subatrophy of the eyeball in 16 % of cases. The remaining patients had stable, positive dynamics of visual functions in the postoperative period.Conclusion: Surgery tactics for extensive eye injuries are individual, and the amount of intervention depends largely on the parameters of the traumatic agent, so planned surgery is preferable to emergency because it allows for detailed preoperative examination and to get valuable information about the condition of the eye. The exceptions are injuries with symptoms of acute endophthalmitis. Multi-unit operations provide optimal conditions for the preservation of the eye as an organ and contribute to the restoration of visual functions.
Results of Cataract Extraction in Patients with Corneal Opacity
Authors: Ivachev E. A. , Anisimova E. V. , Denisova I. P. 
Published: June 2019

Purpose. To evaluate the effectiveness of cataract extraction in patients with varying degrees of corneal opacity.Patients and methods. We performed cataract extraction with implantation of the intraocular lenses of 14 eyes (9 patients) with varying degree of corneal opacity. The causes of corneal opacities were: keratitis in anamnesis — 6 cases, the result of wearing soft contact lenses — 2 eyes, eye injury — 2, the outcome of dermatitis of unspecified genesis with eye damage — 3, perforation of the corneal ulcer — 1 case. In 9 eyes, opacity of the cornea occupied the optic part of the cornea, in 5 cases, the opacity of the cornea was in the paraoptic zone. The middle uncorrected visual acuity of all cases is 0.05 ± 0.03, and the middle best corrected visual acuity is 0.14 ± 0.07. The phacoemulsification of the cataract with implantation of the intraocular lens was performed for all the patients.Results. There were no complications during the operation, in the early and late postoperative periods. As a result of cataract extraction, all patients, regardless of the degree of cornea opacity, noted vision improvement. On the first day after the operation, the middle best corrected visual acuity was 0.06 ± 0.02 in 4 eyes, in 10 cases the middle best corrected visual acuity was 0.09 ± 0.03. The middle best corrected visual acuity 7 days after the surgery was 0.31 ± 0.07. After 6 months of observation of patients with corneal opacity after phacoemulsification of the cataract with implantation of the intraocular lens, the most corrected visual acuity was 0.27 ± 0.19.Conclusions. All patients with corneal opacity of varying degrees of intensity after cataract extraction noted improved vision. The central location of the opacity of the cornea significantly reduced visual acuity, and paraoptic — influenced the vision to a lesser extent. The degree of cornea turbidity was also affected the initial visual acuity — the more clouding and the depth of the cornea, the lower the vision. The result of the lens extraction also depended on the maturity of the cataract — with a more turbid lens the result was higher in relation to preoperative indices.
The Analysis of Risk Factors of Development of Macular Edema after Phacoemulsification
Authors: Kokorev V. L. 
Published: June 2019

Purpose: To identify and analyze factors contributing to the development of macular edema after cataract phacoemulsification (FEC).Methods: over 3 years of follow-up, 6218 surgeries were performed in 4608 patients. They were divided into three groups, taking into account the specifics of the surgery: operated on with 2.2 mm access without posterior capsulorhexis (РC), operated on using MICS technology through access 1.6–1.8 mm without РC, patients operated on with MICS technology through access of 1.6–1.8 mm from РC. The study included patients with persistent cystic macular edema (СMЕ), whose treatment required invasive interventions. During the observation period, 28 cases of persistent CME were identified, which were divided into groups corresponding to the time of onset, type of surgery and comorbidities.Results: a comparative analysis in groups without posterior capsulorhexis with access of 2.2 mm (n = 513) and 1.6–1.8 mm (n = 2588) using the Student’s statistical confidence coefficient (P) showed that a decrease in surgical access was significantly reduces the risk of СМЕ, which confirms its connection with the invasiveness of the intervention.Conclusion: Identified groups of factors that influence the nature of the macula response to the FEC, in particular, the occurrence of macular edema. All factors were analyzed. It was revealed that such factors as comorbidities (diabetes mellitus, age-related macular degeneration), type of surgical approach, and the presence of the epiretinal membrane directly affected the development and progression of macular edema. All factors were analyzed. It was revealed that such factors as comorbidities (diabetes mellitus, age related macular degeneration), type of surgical approach, and the presence of the epiretinal membrane directly affected the development and progression of macular edema. At the same time, revealed a direct relationship between the time of occurrence of CME and its effectiveness, as well as the volume of its invasive treatment. A significant increase in visual acuity in patients suggests a high efficacy of CME treatment associated with surgery.
Spectral OCT-Angiography in En Face Mode for Detection of Morphological Changes in the Retinal Pigment Epithelium before and after Selective Micro-Pulse Laser Exposure in Patients with Central Serous Chorioretinopathy
Authors: Volodin P. L. , Ivanova E. V. , Polyakova E. Iu. , Fomin A. V. 
Published: June 2019

Purpose — to study the morphological changes of the retinal pigment epithelium (RPE) by optical coherence tomography-angiography (OCT-A) in En Face mode before and after selective micropulse laser irradiation in patients with central serous chorioretinopathy (CSC), determine the correspondence between the topographic location of RPE defects and detachment on the OCT-angiogram in En Face mode and points of leakage on the FAG.Patients and methods. There were 20 patients (21 eyes) with CSC before and after laser treatment under the observation. All patients underwent high-resolution FAG and OCT-A using Angio Retina 2×2 or 3×3 mm protocol and Angio Retina HD 6×6 mm. The treatment was carried out in a selective micropulse mode with individual selection of parameters using the Navilas 577s navigation laser system (OD-OS, Germany) or the IQ 577 laser system (IRIDEX, USA).Results were evaluated at 2 weeks and 1 month after treatment. Results. In all cases, the leaking points of the subretinal fluid on FAG corresponded to the topographic location of defects and detachments of RPE detachment on OKT-A En Face. According to OCT-A En Face, the following morphological changes were revealed: in 5 cases — single defects of RPE, in 7 cases — multiple defects of RPE, in 9 cases of slit-like detachment of RPE, in 3 patients a combination of slit-like detachment and defect RPE. The sizes of RPE defects varied in the range from 21 to 159 microns, while their rounded shape prevailed. 1 month after the selective micropulse laser effect on OCT-A in the En Face mode, the defects were closed and the RPE detachments fit in all patients, which resulted in resorption of the subretinal fluid and the neurosensory retina attachment.Findings. OCT-A in En Face mode is a highly informative diagnostic method that allows noninvasive detection of morphological changes in RPE with a clear topographic localization relative to the retinal vascular network, as well as evaluating the effectiveness of selective micropulse laser treatment in patients with CSC.
The Role of the Complex Clinical-Anamnestic and the Laboratory Examination in Establishing the Etiology of Endogenous Uveitis
Authors: Konkova A. Yu. , Horowitz E. S. , Gavrilova T. V. , Pozharitsky M. D. , Chereshneva M. V. 
Published: June 2019

Purpose: to estimate the results of the clinical and laboratory survey among patients with uveites for refinement of the disease’s etiology.Patients and Methods. 107 patients with uveites (114 eyes) were under control. A standard ophthalmologic survey was done with them; a serodiagnosis (immunoassay analysis) towards Toxoplasma gondii, Herpes simplex virus Ist, IInd types, Citomegalovirus, Chlamidia trachomatis; a bacteriological examination of tear fluid, some material from nose and cavity to definite factors of virulence and antibiotic sensitivity of exuded microorganisms. A molecular and genetic survey (PCR) of tear fluid towards Toxoplasma gondii , Herpes simplex virus Ist, IInd types, Citomegalovirus was done among 30 people.The results. Provocative factors of the disease were detected in 42 % of cases. Concomitant diseases were in 77 %. Diseases of cardiovascular system prevailed in 49 %; ceiling of mouth cavity in 42 %; systemic diseases in 29.3 %. The most widespread were anterior uveites in 60.5 %; recur character prevailed in 51 %; deteriorations progressed in 58.8 % of cases. A chronic infection with herpes viruses was among almost all the patients (HSV I, II — 100 %, CMV — 96.3 %). To Toxoplasma gondii specific IgG were detected in 44.9 %, IgM in 2.8 %; to Clamidia trachomatis specific IgG in 21.5 %. 66 strains of bacteria were selected: from tear fluid — 34, from mouth — 17, from nasal cavity — 15; gram-positive bacteria of Staphylococcus prevailed in 83.3 %. In some cases of revealing S. aureus, which were isolated from all three biotypes, they were close to their phenotypic characteristics, which indicates to their etiologic importance in uveites’ progress. The research of tear fluid in PTSR turned to be less informative. Based on the anamnesis and the results of a complex survey it managed to become possible to decipher the etiology of the disease in 74.6 %. Among them were 67.1 % of infectious and infectious-allergic uveites; 80.7 % of bacterial uveites; 15.8 % of virus uveites and 3.5 % of parasitic uveites. 28.2 % of inflammations occurred on a background of system and syndromic diseases, the majority of diseases were on a background of Behterev’s disease and rheumatoid arthritis, 45.5 % for each. Non-infectious autoimmune and toxical-allergic reasons were set in 4.7 % of cases.Conclusion. It is more expediently to use a complex diagnostic approach with taking into account clinical and anamnestic information and laboratory information of the survey in the investigation of uveitis etiology.
Wide-Field Imaging with NAVILAS Laser System
Authors: Kulikov A. N. , Maltsev D. S. , Burnasheva M. A. , Volkov V. V. , Danilichev V. F. , Troyanovskiy R. L. 
Published: June 2019

Purpose: to study the potential of wide-field imaging with NAVILAS laser system.Material and methods. In this study we included patients diagnosed with indirect ophthalmoscopy as having one of the follows: diabetic retinopathy (6 eyes), central retinal vein occlusion (5 eyes), choroidal melanoma (3 eyes), rhegmatogenous retinal detachment (4 eyes), and peripheral chorioretinal degeneration (10 eyes). Using NAVILAS 532 laser system and a wide-field contact lens (HR Wide Field (VOLK)) a wide-field central image and a panoramic (consisted of 4 to 6 images) images were obtained in all patients. Fundus images were evaluated according to their diagnostic value versus indirect ophthalmoscopy and wideness of the viewing angle versus standard color fundus photography (55°). In each patient within a single session were obtained: 1) a central fundus image and 2) panoramic image (4-field and in dynamic mode). In a subgroup of patients with central retinal vein occlusion and lattice retinal degeneration, we studied the ability of simultaneous laser photocoagulation wide-field imaging.Results. A single field images obtained with NAVILAS allows to visualize up to 130.3 ± 9.6° of the eye fundus while four-field and dynamic acquisition up to 150.1 ± 8.9° and 171.3 ± 17.0°, respectively. Representative findings of diabetic retinopathy, central retinal vein occlusion, choroidal melanoma, rhegmatogenous retinal detachment, and peripheral lattice degeneration were identified in all cases. Insufficient visualization was found for “snail track” degeneration because the subtle retina and choroid changes were hardly seen on the low magnified image. In 4 patients with lattice retinal degeneration and 3 patients with central retinal vein occlusion within a single session, both wide-field imaging and laser photocoagulation were performed. Surgical goals were achieved in all cases.Conclusion. Wide-field imaging with NAVILAS laser system demonstrated high potential in the documentation of the most widely spread eye fundus disease the and represents an adequate alternative for wide-field fundus cameras. Aside from wide-field imaging this approach also allows for simultaneous laser photocoagulation in entire eye fundus including far peripheral retina.