270 research outputs found

    Metacognitive Activities Performed by Pre-Service Science Teachers in Scientific Reasoning Skills Teaching with the POE Technique

    Get PDF
    The aim of this study was to investigate the pre-service teachers’ metacognitive activities occurring in the teaching scientific reasoning skills with the POE technique. The participants of the research included six pre-service science teachers who were seniors in the science education department of at a university in the west of Turkey. The holistic single-case design was used as the research method in this study. The POE Activity Report, an Activity Journal and a Semi-structured Metacognition Observation Form were used to examine the participants’ metacognitive activities. Inductive and comparative analysis was used to. It was found that (i)  the pre-service teachers performed various monitoring activities (f = 13) and evaluating activities (f = 4) in the teaching of six different scientific reasoning skills (control of variables, proportional reasoning, correlation reasoning, probability reasoning, combinational reasoning, hypothetical-deductive reasoning) with the POE technique; (ii) there was more variety in metacognitive activities performed by pre-service teachers in teaching of control of variables (f = 15), there was least diversity in the teaching of hypothetical-deductive reasoning skill (f = 10). The results were discussed in line with the related literature, and suggestions were presented regarding the teaching of scientific reasoning skills

    GPR Image Recovery Effect on Faster R-CNN-Based Buried Target Detection

    Get PDF
    Measurements acquired through ground-penetrating radar (GPR) may contain missing information that needs to be recovered before the implementation of any post-processing method, such as target detection, since buried target detection methods fail and cannot produce desired results if the input GPR image contains missing information. This study proves that the recovery of missing information in a GPR image has a direct influence on the performance of subsequent target detection methods. Thus, state-of-the-art matrix completion methods are applied to the GPR image with missing information in both pixel- and column-wise cases with different missing rates, such as 30% and 50%. After the GPR image is successfully recovered, the faster region-based convolutional neural network (Faster R-CNN) target detection method is applied. The performance correlation between matrix completion accuracy and the target detection method’s confidence score is analyzed using both quantitative and visual results. The obtained results demonstrate the importance of GPR image recovery prior to any post-processing implementation, such as target detection

    THE EVALUATION OF LEARNING OUTCOMES IN TRANSLATOR TRAINING IN TERMS OF THE BOLOGNA PROCESS

    Get PDF
    Öz:Türkiye'nin Avrupa Birliği'ne giriş sürecinin başlamasıyla her alanda olduğu gibi Yüksek Öğrenim alanında da uyum ve tanınma gereksinimi doğmuştur. Avrupa Yükseköğretim Alanı yaratmayı hedefleyen bir reform süreci olarak bilinen 'Bologna Süreci' her ülkenin özgür iradeleri ile katıldıkları bir oluşumdur. Bu oluşumun hedefleri doğrultusunda 'Avrupa Yeterlikler Çerçeveleri' ve bu çerçevelerle bağlantılı olarak her ülke için 'Ulusal Yeterlikler Çerçeveleri' oluşturulmuştur. Bu çalışmada yeterlikler çerçevesinin önemli kavramlarından biri olan 'öğrenme çıktıları' incelenecektir. Önceden başka bilim dallarının alt/yan alanı olarak kabul görmüş fakat günümüzde bağımsız bir bilim dalı olarak tanınmakta olan 'çeviribilim', bu alanda verilen üniversite düzeyindeki eğitimin önemi, Bologna Sürecinde ortak yükseköğretim hedeflerine uyumun getirileri ile zorlukları ve öğrenme hedefleri doğrultusundaki öğrenme çıktılarının ne derece gerçekleştirilebilir ya da uygulanabilir olduğu gibi konular kendi aralarında ilişkilendirilerek değerlendirilecek, bu bağlamda bazı öneriler getirilmeye çalışılacaktır

    Estimation of variance components and genetic parameters for type traits and milk yield in Holstein cattle

    Get PDF
    This research was conducted to estimate variance components and genetic parameters for type traits and milk yield in Holstein-Friesian cattle. In this study, 597 daughters of 158 sires in 128 herds were classified. In the data analysis, type scores for 354 daughters bred within 70 herds sired by 46 sires that had at least 3 daughters, and 304 lactation records for 206 daughters within 56 herds sired by 37 sires, were considered. For estimation of variance components and correlations among the traits, the MTDFREML package program was used. The mean stature was 145.56 cm. Means for linear traits varied from 4.47 for fore teat placement to 6.42 for body depth. Heritability for fore udder attachment and front teat placement were both 0.00. Heritability for linear traits estimated for lowest and highest dairy character values and for body capacity were 0.06 and 0.62, respectively. Values for heritability and repeatability of milk yield were 0.20 and 0.20, respectively.Cattle Breeders' Association of Burs

    Physiology of decapod crustacean larvae with special reference to diet.

    Get PDF
    This study investigates the factors affecting larval and postlarval survival and growth of some de capod crustaceans with special emphasis on diets. Investigations were concentrated on the influence o live and artificial diets on larval growth, survival, development and trypsM activity of a cominerciall, important marine penaeid shrimp Penaeus indicus and a freshwater prawn Macrobrachium rosenber gij. In addition, feeding behaviour, gastroevacuation time, trypsM activity of other decapod species wen also studied. Live mixed microalgae Tetraselmis chuii and Skeletonema costatum at 60-70 cells PI-1 promote( highest larval survival, fastest growth and development in P. indicus in comparison to single algal spe cies. Rhinomonas reticulata neither alone nor in combination with other algal species was suitable a! food for the shrimp larvae, A water salinity (S) of 25 ppt was optimal for larval and postlarval cultun of this penaeid species. Postlarvae (PL) of P. indicus reared at lower salinities between PL7 and PL& (20-30 ppt) had a significantly (P<0.05) higher survival and a better growth than those at higher wate salinities. Early PL resisted sudden salinity change of 10 ppt, but required an adaptation period fo greater salinity changes, 10 ppt S was lethal to animals at around PL40-45. A free-living nematode Panagrellus redivivus was found to be a suitable alternative for live algai and Artemia in the culture of P. indicus. The nematodes gave good survival, but lower growth than al gaelArtemia from PZI to PLI. Larval growth and survival were significantly improved when the larvai were fed on either nematodes plus algal co-feeds or liPid-enriched nematodes. Pigmented- (astaxanthin nematodes also improved survival and colour of P. indicus larvae in comparison to non-pigmented ones Conventional live diets were also completely replaced using microencapsulated diets (MED) fo the culture of P. indicus, Like the nematodes, MED as a sole feed resulted In lower survival, slowe growth and development in comparison to algaelArtemia. Addition of 15 cells gl-1 frozen algae signifi cantly improved growth and survival during larval development. The larvae fed MED plus algal co feeds had significantly (P<0.05) higher trypsm activity than those fed MED as a sole feed. Similarly provision of 15 cells gl-' algae with nematodes for only 24h or 48h resulted in significant increase H trypsin activity and improved survival and growth to levels comparable to those obtained from al gaelArtemia. It appears that the presence of an algal diet is necessary to induce larval trypsin activity Mi P. indicus at early protozoeal stages, but algae do not influence trypsin at mysts stages. Results sugges that both nematodes and formulated diets lack gut enzyme stimulants and are less digestible than al gaelArtemia diets. When freeze-dried algal materials were incorporated into MED, it was found tha algal substances which trigger larval digestive enzymes were retained within the capsules. Whether thi will improve growth and survival of penaeid larvae remains to be examined. In contrast to penaeid larvae, a complete replacement of live Artemia with nematodes or artificia diets was not possible for the culture of caridean M rosenbergii and PaIdemon elegans larvae. Fo both species, only a partial replacement was achieved from Z4/5 to metamorphosis by using formulateA diets. It was found that these larvae have very low trypsin activity levels between ZI and Z4/5, but th, levels increase sharply afterwards, coinciding with a vast increase in the hepatopancreas. This sharl increase in digestive enzyme activities and longer food retention time enable these larvae to survive oj less digestible formulated diets. A comparison of specific trypsin activity in several larval decapod crustaceans shows a pattein with high levels in herbivores, low levels in carnivores and intermediate levels M omnivores. Herbivor penaeid larvae (P. indicus) and copepods (Temora longicornis and Centropages typicus) rely on hig digestive enzyme activities to extract nutrients from less digestible algae, whereas carnivorous larvaE the lobsters (Homarus gammarus and Nephrops norvegicus) and carideans (M. rosenbergii and .1 elegans) have limited enzymatic capacity and hence require large and easily digestible prey, but rests long starvation periods. Omnivorous mysis penaeid larvae and Carcinus maenas have intermediat levels of digestive enzymes and are able to transfer from herbivorous to omnivorous feeding. To datE only decapod larvae which show high trypsm activity can be successfidly reared to metamorphosis o: formulated feeds. Inclusion of algal material, as a gut enzyme stimulant, for penaeid protozoeal stage and pre-digested ingredients for later stages into feeds are proposed

    Ground penetrating Radar Clutter Removal via 1D Fast Sub band Decomposition

    Get PDF
    Target detection performance in ground-penetrating radar (GPR) deteriorates highly in the presence of clutter. Multi-scale (wavelet transform) or the recently proposed multi-scale and multi-directional decomposition based methods can efficiently remove the clutter, however they have high computational complexity. In this paper, we propose a new multi-scale method which requires only 1D fast subband decomposition of the rows of the GPR image. The resulting detail layers directly provide the clutter-free target component of the GPR image. The proposed method is compared to the state-of-art clutter removal methods both visually and quantitatively using a realistic simulated dataset which is constructed by the gprMax simulation software. The results show that the proposed 1D subband decomposition scheme approximates the classical 2D wavelet decomposition successfully and even presents a performance increase as well as a complexity decrease for fast decomposition methods based on lifting wavelet transform and a trous wavelet transform

    Öz-düzenlemeli öğrenme üzerine yapılan araştırmaların bibliyometrik analizi: Başlangıçtan 2021’e

    Get PDF
    : The present study explores the self-regulated learning (SRL) research published in English or Turkish language journals included in the Web of Science database from the beginning to 2021 via bibliometric analysis. The 2197 articles that met the eligibility criteria were included in the study. The results reveal that the research on SRL has been carried out mostly by scholars from the USA and has gained increased attention since the 2000s. The three most influential scholars of self-regulated research are Chia-Wen Tsai, Philip H. Winne, and Roger Azevedo; however, the two top documents by local citations belong to Barry J. Zimmerman (2008) and Paul R. Pintrich (2004) in the study. The analyzed studies cited the Journal of Educational Psychology and Contemporary Educational Psychology most. The results reveal that motivation, metacognition, self-efficacy, and learning strategies are the keywords that most frequently occur and co-occur in the analyzed studies along with SRL. The trend topics of SRL research have been learning analytics, flipped classrooms, and MOOCs since 2018.Bu çalışma, başlangıçtan 2021 yılına kadar Web of Science veri tabanında yer alan İngilizce veya Türkçe dergilerde yayınlanan öz-düzenlemeli öğrenme araştırmalarını bibliyometrik analiz yoluyla incelemektedir. Uygunluk kriterlerini karşılayan 2197 makale çalışmaya dahil edilmiştir. Sonuçlar, araştırmaların çoğunlukla ABD’li akademisyenler tarafından yürütüldüğünü ve öz-düzenlemeli öğrenmenin 2000’li yıllardan bu yana eğitim araştırmalarında artan bir ilgi gördüğünü ortaya koymaktadır. Öz-düzenlemeli öğrenme araştırmalarının en etkili üç akademisyeni Chia-Wen Tsai, Philip H. Winne ve Roger Azevedo olarak belirlenirken, yerel atıflara göre en etkili ilk iki doküman Barry J. Zimmerman (2008) ve Paul R. Pintrich’e (2004) aittir. İncelenen çalışmalar en çok Journal of Educational Psychology ve Contemporary Educational Psychology dergilerine atıfta bulunmuştur. Ayrıca, sonuçlar incelenen çalışmalarda öz-düzenlemeli öğrenme ile birlikte en sık geçen ve birlikte kullanılan anahtar kelimelerin motivasyon, üstbiliş, öz-yeterlik ve öğrenme stratejileri olduğunu göstermektedir. 2018’den bu yana SRL araştırmalarının trend konuları öğrenme analitiği, ters yüz edilmiş sınıflar ve MOOC’lar olmuştur

    Image Enhancement Methods for Remote Sensing: A Survey

    Get PDF
    The quality of the images obtained from remote sensing devices is very important for many image processing applications. Most of the enhancement methods are based on histogram modification and transform based methods. Histogram modification based methods aim to modify the histogram of the input image to obtain a more uniform distribution. Transform based methods apply a certain transform to the input image and enhance the image in transform domain followed by the inverse transform. In this work, both histogram modification and transform domain methods have been considered, as well as hybrid methods. Moreover, a new hybrid algorithm is proposed for remote sensing image enhancement. Visual comparisons as well as quantitative comparisons have been carried out for different enhancement methods. For objective comparison quality metrics, namely Contrast Gain, Enhancement Measurement, Discrete Entropy and Average Mean Brightness Error have been used. The comparisons show that, the histogram modification methods have a better contrast improvement, while transform domain methods have a better performance in edge enhancement and color preservation. Moreover, hybrid methods which combine the two former approaches have higher potential

    Use of Poultry By-product and Plant Protein Sources in Diets of Redclaw (Cherax quadricarinatus)

    Get PDF
    A total of 300 juvenile crayfish (13.0±0.03 g) were randomly distributed among 5 dietary groups (n=60, 3 replicates) held within 15×500 L-1 fiberglass tanks connected to a recirculation system (RAS), at 20 crayfish per tank. Each group was fed for 12 weeks one of five experimental diets where the main protein sources were: 1) control, fish-meal-based diet (FM, 48% of the diet); 2) 10% FM + 52.5% poultry by-product meal (PoM); 3) 34.5% soybean meal + 34.5% corn gluten meal (Pmix); 4) 34.5% PoM + 32.soybean/corn gluten meal mix (PoM/Pmix); and 5) 10% FM + 27.5% soybean + 27.5% corn gluten meal (FM/Pmix). The results demonstrated that there were no significant differences among diets in terms of growth and feed utilization efficiency. Muscle amino acid profile of redclaw crayfish fed the FM diet had the highest level of total essential amino acids, followed by FM/PMix, Pmix, PoM/Pmix, and PoM diets. Particularly, in all experimental groups, the highest essential amino acids (EAA) were lysine, arginine, and leucine. Based on these findings, we conclude that redclaw can perform well with FM-free vegetable diets and PoM-based diets although more research is needed into the total composition of EAA and FA in muscle
    corecore