Showing 109 results for Yu
Volume 0, Issue 0 (Articles accepted at the time of publication 2024)
Abstract
This research is aimed to capture EFL teachers’ use of technology in Task-Based Language Teaching (TBLT) by focusing on the variety and intensity of tasks in teaching reading. Driven by the survey research, the data were collected from 71 teachers of English as a Foreign Language (EFL) in Indonesia and analyzed descriptively. The findings show that the EFL teachers perceived that the use of technology in TBLT in teaching reading is important and it can enhance students' language learning experiences. Technology offers engaging materials and activities that aid reading comprehension. Furthermore, EFL teachers' use of various tasks and resources may indicate a need for continuing professional development to improve digital literacy skills and pedagogical strategies of English teachers in EFL context. Although the findings of this survey give an insight into the data of English teachers’ use of technology in TBLT in terms of variety and intensity in teaching reading, this survey has its limitations with regard to the numbers of participants. This research highlights the dynamic relationship among technology, TBLT, and reading instruction in the EFL context, and suggests the need for continued research and exploration of best practices in this area. The current study succeeded in adding new empirical studies related to the variety and intensity in pre-reading, whilst-reading and post-reading activities of EFL teachers enacting teaching reading with the use of TBLT.
Volume 0, Issue 0 (ARTICLES IN PRESS 2024)
Abstract
Small and mid-sized enterprises (SMEs) have played a significant role in the growth and advancement of the Chinese agriculture sector. However, these enterprises often face challenges in navigating local distribution networks, complying with regulations, and procuring local consumer products, which can hinder the marketing environment and impede economic growth. To address these issues and promote continuous business development, Chinese agriculture enterprises require effective modeling techniques that facilitate transformation to meet evolving requirements. This study proposes a game-theoretic approach, specifically the Mixed Strategy Game-Theoretic Approach (MSGTA), as a decision-making tool for enterprises facing pre-emptive changes. By analyzing oligopoly firm behavior, the MSGTA approach identifies enterprise outcomes, cooperation patterns, and price-fixing strategies, providing decision-making options and incentives within the enterprise structure. The MSGTA approach assists SMEs in the Chinese agriculture market by systematically analyzing product development stages and ensuring the effective adoption of pre-emptive changes. The efficiency of SMEs implementing the MSGTA approach is evaluated by examining statistical relationships between enterprise growth and requirements. By integrating effective modeling techniques, Chinese agriculture SMEs can adapt to changes proactively, enhance their ability to navigate local distribution networks, comply with regulations, and procure local consumer products more effectively, thereby improving the marketing environment and fostering economic growth.
Volume 0, Issue 0 (ARTICLES IN PRESS 2024)
Abstract
The study aimed to assess the pathogenicity of the fungus Alternaria alternata on various Tulipa L. species and elucidate its phylogenetic position. The research focused on five specific tulip varieties: T. Albatros, T. Tarda, T. Delta Storm, T. Biflora, and T. Biebersteiniana. Methodologies included molecular analysis, microscopic examinations, cultivation of fungi on PDA, and sequencing of the 18S and 5.8S rRNA genes, as well as the D1/D2 region of the 26S rRNA gene. Results revealed variable pathogenicity across tulip species, with T. Albatros showing complete leaf damage and extensive conidium formation, while T. Biebersteiniana exhibited minimal damage. Factors influencing infection severity included plant variety, conidium formation, and environmental conditions. Sequencing confirmed the fungus's affiliation with the Alternaria genus and highlighted its close relation to other species. The findings underscore the importance of molecular methods for accurate pathogen identification and phylogenetic classification. These results are crucial for developing targeted disease management strategies and enhancing plant resilience in agriculture.The application of the findings is feasible within agriculture to develop resilient varieties and methods for managing the dissemination of A. alternata. Plant diseases involve complex interactions between pathogens and hosts, where fungi like Alternaria alternata disrupt plant physiology through toxin production and enzyme secretion, making effective management crucial
Volume 1, Issue 3 (9-2013)
Abstract
In order to understand the importance of particle size and agglomeration for nano-eco-toxicological studies in aquatic environments, the acute toxicity of two different types (suspended powder and colloidal) of silver nanoparticles (AgNPs) were studied in alevin and juvenilerainbow trout. Fish were exposed to each type of AgNPs at nominal concentrations of 0.032, 0.1, 0.32, 1, 3.2, 10, 32, and 100 mg/L. Lethal concentrations (LC) were calculated using a Probit analysis. Some physical and chemical characteristics of silver nanoparticles were determined. In the case of colloidal form, particles were well dispersed in the water column and retained their size; but in the case of suspended powder, particles were agglomerated to large clumps and precipitated on the bottom. In alevins, the calculated 96 h LC50 values were 0.25 and 28.25mg/L for colloidal and suspended powder AgNPs respectively. In the case of juveniles, the 96h LC50 of colloidal form was 2.16mg/L, but suspended powder did not caused mortality in fish even after 21 days. The results showed that both in alevin and juvenile stages, colloidal form is much toxic than suspended powder; this shows increase of nanoparticles size due to agglomeration, will reduce the toxicity. Silver nanoparticles are toxic materials and their release into the water environment should be avoided.
Volume 1, Issue 3 (Summer 2023)
Abstract
This study focuses on determining the concentration of fluoride ions in selected hand-dug wells and investigating its health implications in Gwagwalada Area Council, Federal Capital Territory, Abuja. The necessity for this investigation arose from observed health issues, including dental and skeletal fluorosis among the residents in the area. Fifteen sampling points (well water sources) were chosen in the study area, and a total of forty-five samples (three per sampling point) were collected. The calorimetric water quality analysis method was employed to analyze these samples in the laboratory. Additionally, the Inverse Distance Weighting (IDW) interpolation method was used to generate a spatial variation map for fluoride ion concentration using ArcMap. The results indicate a concentration range of 0.122 mg/L to 1.910 mg/L across the study area. When compared with the recommendations for fluoride ion concentration in the Nigeria Industrial Standard (NIS) for drinking water (0.1 – 1.0 mg/L), approximately 67% of the sampling points (10 out of 15) fall within the recommended values, while 33% fall outside. The areas with higher fluoride ion concentrations include Dupa 1, Dupa 2, Tunga Maje 1, Tunga Maje 2, and Old Kutunku 2. The study concludes that the observed dental and skeletal fluorosis in these areas can be attributed to the consumption of water with high fluoride concentrations. Consequently, the study recommends increased attention from both local and federal authorities to provide potable water for human consumption in these areas to address the associated health challenges.
Volume 2, Issue 1 (1-2016)
Abstract
Background: Most of the population in the different areas of world is affected by bacterial infections responsible for dental caries. Due to the importance of traditional medicines derived from herbs used for dental problems, this study investigated in vitro antibacterial activity of Mentha longifolia essential oil from Ardabil, Iran, on Streptococcus mutans, Lactobacillus rhamnosus and Actinomyces viscosus,bacteria that cause tooth decay. Materials and Methods: The volatile oil of Mentha longifolia leaves was extracted by hydrodistillation method using a Clevenger-type apparatus and analyzed by GC and GC/MS system.The antibacterial activity was evaluated by the disk diffusion susceptibility in dilutions of 62.5, 125, 250, 500, 1000 and 2000μg/μl and broth macrodilution test methods. Results: The oil was particularly rich in Pulegone (31.78%), 1,8-cineole (15.99%), menthoforan (11.25%), cis-isopulegon (10.5%) and paramenth-3-n-8-l (6.85%). The medicinal plant essential oil could prevent the growth of the bacteria, and the rates of MIC and MBC of native pennyroyal essential oil on Streptococcus mutans, Lactobacillus rhamnosus and Actinomyces viscosus were 110, 165, 80, 120, 450 and 650μg/μl, respectively. The maximum inhibition zone diameter was about 12.2, 27.2 and 4.8 mm, for Streptococcus mutans, Lactobacillus rhamnosus and Actinomyces viscosus respectively, at the concentration of 500μgμl-1. Conclusion: In this work, the essential oil of medicinal plant containing effective ingredients could prevent the growth of bacteria and may be used as an affordable and available source for medicinal purposes.
Volume 2, Issue 3 (7-2016)
Abstract
Background: Leptospirosis has been recognized as an important reemerging infectious disease caused by pathogenic Leptospira spp. A major challenge of this disease is the application of a basic research to improve diagnostic method. Outer membrane proteins of Leptospira are potential candidates that could be useful in diagnosis. Among them the lipL41 is an immunogenic protein which is present only in pathogenic serovars. In order to evaluate genetic conservation of the lipL41 gene, we cloned and sequenced this gene from Leptospira interrogans serovar Canicola.
Materials and Methods: Following the DNA extraction from the serovar, the lipL41 gene was amplified and cloned into pTZ57R/T vector and transformed into the competent E. coli (Top10). Recombinant clones were confirmed by colony PCR and DNA sequencing. The related sequences were then analyzed and compared with the sequences in the Genbank database.
Results: PCR amplification of the lipL41 gene resulted in a 1065 bp PCR product. The PCR based on the lipL41 gene detected all the pathogenic reference serovars of the tested Leptospira spp. It was revealed that in Iran the homology of the lipL41 gene between vaccinal and clinical serovars of Canicola was 100%. It also showed >95.9% homology with other pathogenic serovars in Genbank database, which indicates genetic conservation of this gene.
Conclusion: Because of the conservation of lipL41 gene among different strains of Leptospira and its exclusive presence in leptospira, it was revealed that the cloned gene could be further used as a good candidate for developing diagnostic methods such as ELISA and as positive control in diagnostic PCR.
Volume 2, Issue 3 (Summer 2020)
Abstract
The 21th century has been confronted with wonderful changes in the dimensions of technology, social, economic, and political, perhaps no organization and settlement be safe from their changes and events. In recent decades, strategic management is one of the important organizational and institutional issues that has attracted researchers and experts. In addition, this strategic management has expressed among many new theories and approaches in developed countries and, consequently in all over the world including Iran, which in turn created a lot of new theoretical and practical challenges. This research has been tried by using a descriptive method, discourse analysis, and critique of the framework, that propose strategic management as new management in the service description of spatial planning. Therefore, in the first step, examined the constituent parts of the management spatial planning in the description of the services and then described planning and strategic management and strategic management process as the integrated and practical and at the end, presented suggestions for achieving strategic management in the description of the services of spatial planning with the achieve of integrated management, in the service description of the spatial planning, we will see the operational of the spatial planning oriented programs in the territory of Iran.
Volume 3, Issue 3 (9-2017)
Abstract
Background: Recently, the use of probiotics in preventing and treating the immune system diseases through changes in blood factors has attracted the attention of researchers. Therefore, the aim of this study was to evaluate the effect of Lactobacillus plantarum and Bifidobacterium B94 on changes of blood factors, influencing the autoimmune system diseases.
Materials and Methods: The rats used in this study were divided into four groups (n=10 each), including control (saline), damage with Ethidium bromide (EB), L. plantarum and Bifidobacterium B94 treatment groups. In damage and treatment groups, a single dose of 3μL EB was directly injected into hippocampus of rats for inducing demyelization. Also, in control group, the same amount of saline was used. Then 2×108 probiotic bacteria were administered by gavage for 28 days. Then serum calcium and cholesterol levels were measured. Data were analyzed by one-way ANOVA and Tukey post-hoc tests (p≤ .05).
Results: The results showed that level of blood serum calcium increased insignificantly in the L. plantarum and Bifidobacterium B94 treatment groups compared to control group. Also, the level of blood serum cholesterol decreased insignificantly in both treatment groups compared to control group.
Conclusion: Probiotics are used for preventing and treating some of the common autoimmune diseases such as MS. Previous studies showed that probiotics affects some of the blood parameters such as calcium and cholesterol while decrease or increase in these parameters is effective in the improvement of MS. Although no significant finding has been obtained in some of these studies, they have almost confirmed the recommendation of probiotic consumption.
Volume 3, Issue 4 (12-2014)
Abstract
A total of 29 species in 16 genera and 8 subfamilies of the braconids (Hym., Braconidae) were collected from alfalfa fields in Bahariya and Farafra oases (Western Desert, Egypt) These species were identified, together with details of the sites where they were found and an indication of their relative abundance in each site. Among the samples, 4 species in 4 genera and 3 subfamilies are recorded as new to the Egyptian fauna. These are: Aphidius asteris Haliday, 1834, Ephedrus plagiator (Nees, 1811) (Aphidiinae), Homolobus (Chartolobus) infumator (Lyle, 1914) (Homolobinae) and Opius lugens Haliday, 1837 (Opiinae). Thirteen braconid species are also newly recorded in association with alfalfa fields, namely A. asteris; Praon necans Mackaeur, 1959 (Aphidiinae); Habrobracon hebetor (Say, 1836) (Braconinae); Chelonus basalis Curtis, 1837; Ch. blackburni Cameron, 1886; Ch. oculator (Fabricius, 1775); Phanerotoma leucobasis Kriechbaumeri, 1894 (Cheloninae); Dinocampus coccinellae (Schrank, 1802) (Euphorinae); H. (C.) infumator (Lyle, 1914) (Homolobinae); Apanteles appellator Telenga, 1949; Cotesia glomerata (Linnaeus, 1758) (Microgastrinae); Psyttalia concolor (Szépligeti, 1910) and P. nilotica (Schmiedeknechti, 1900) (Opiinae).
Volume 3, Issue 9 (Spring 2022)
Abstract
The role of sports sociology is to explain and better understand the phenomenon of sports and its function. There are many researches in the field of sports sociology in Iran. But, a general look at these researches' status, findings, and approaches is needed. This study was conducted with the aim of a systematic review of sports sociology research in Iran. The research method was qualitative and developmental. This research, as a secondary study, has been done with a systematic review approach. The research sample consisted of 19 articles published in domestic scientific research journals between 1390 and 1400, which were extracted from "Noormags," "Magiran," "SID," and "Ensani" databases. The research results showed that the conducted studies can be categorized in the two general categories of social function of sports in 28 subcategories and social participation of sports in 119 subcategories. The subcategories such as social order, social cohesion, aggression, abnormal behavior, moral behavior, social policy, social trust, and hooliganism can be classified under a more general category called the social function of sports. Also, subcategories such as culturing sports for all, sports participation of women based on gender norms, sports participation of the disabled, participation in sports activities of women and men, social consequences of participation in sports, sports participation of the elderlies are categorized in the concept of "social participation in sports." The most important research gap observed in the studies of the sociology of sports is related to the field of cultural behaviors, including the cultural behaviors of spectators, such as slogans and activities of spectators in sports venues.
Volume 4, Issue 1 (3-2015)
Abstract
Cercosporoid fungi including the genus Cercospora and other morphologically similar genera are associated with leaf spot symptoms on various host plants. In this research three taxa including Passalora cucurbiticola (on Cucurbita sp.), P. bolleana (on Ficus carica), and Pseudocercosporella capsellae (on Capsella bursa-pastoris, Sinapis arvensis) were identified. Among these, P. cucurbiticola and P. capsellae are new records for mycobiota of Iran.
Volume 4, Issue 2 (No.2 (Tome 14), (Articles in Persian) 2013)
Abstract
Ancient Muslim linguists paid due attention to both linguistic and non-linguistic contexts. An investigation into Hāzim Qarṭājannī's views can help in developing a relatively comprehensive framework in this respect. However, in general, ancient linguists' views are not the same and vary from social perspectives on language (i.e. paying attention to non-linguistic factors) to pure formalistic views. Hence, ancient Muslim linguists' views have to be considered as a whole to be able to reach a comprehensive framework on context and its uses in action. The reasons behind the ancient linguists' attention to context were threefold: evaluating the accuracy, analyzing the meaning of the texts, and regenerating the lost non-linguistic context from the linguistic context to arrive at the meaning. The present study investigates the ancient linguists' views on context mainly through the framework derived from Ḥāzim Qarṭājannī's "Minhāj al-Bulaghā".
Volume 4, Issue 3 (Fall 2020)
Abstract
Research Subject: Poly(dimethylsiloxane) (PDMS) is a silicone polymer that nowadays despite unique characteristics and high application potential of its microparticles, their preparation via bulk emulsification methods is a main challenge due to the limitations in mixing process, high viscosity and low surface energy of PDMS that make impossible accurate control of final obtained particles. In the present work, size-controlled PDMS microparticles were prepared from a high-viscosity material.
Research Approach: PDMS microparticles were obtained by using glass capillary co-flow microfluidic device. The designed microfluidic device is facile, inexpensive and reusable and facilitated preparation of the high-viscosity PDMS microdroplets. Stabilizing the oil-in-water emulsion was obtained by optimizing the bath components and curing process that resulted in monodisperse and spherical PDMS microparicles. Effect of the some important adjustable parameters such as microchannel diameter and flow rate on the flow regimes and microparticles polydispersity were investigated by means of optical microscopy and scanning electron microscopy.
Main Results: Results showed a dripping regime for producing monodisperse microparticles at low flow rates of the continuous phase and monodisperse microparticles from it. On the contrary, microparticles obtained from jetting regime are more polydisperse and smaller in comparison with dripping regime. By reducing the diameter of inner microchannel, microparticles with a diameter of 1.83 µm were obtained. Using the designed technology, uniform nanocomposite PDMS/ZnO microparticles 318 µm in diameter containing 15% ZnO were obtained from an oil phase viscosity of 7550 mPa.s. Therefore by an optimized and facile method, size-controllable uniform microparticles can be prepared that are proposed for various applications including drug delivery, bioengineering and electronic industry.
Volume 4, Issue 16 (Winter 2011)
Abstract
Debate is one of the literary prose types prevalent in Persian. In prose debates, two or more characters are presented in dialogue writing with each other and ultimately the authorsummarizestheir language and reaches a conclusion. The structure of these debates is mostly based on dialoguewriting. During the Constitutional era of Iran, these kinds of debates were regarded as ‘objectwriting’ or ‘theatrical writing.’ With respect to their formal structure and particularstyle of dialogue writing, it can be asked whether they can be read from a dramatic point of view. The dramatic tone and language, dialogue-based dramatic action, conflict, time and place are some of the identifiable aspects that are studied in this paper. The aim of this paper is to introduce a dialogue-based model for the study of the dramatic aspects of these debates. This model is proposed on the basis of a comparative study of dialogue in prose and drama as well as identifying commonalities between these two types of literature.
Volume 5, Issue 4 (12-2019)
Abstract
An overview of the Arachnida and their study in Iran is provided. Besides ancient poetry, relics (going back to 5,000 YBP), and early medical observations (at least 2,000 YBP), the first published taxonomical observations of arachnids from Iran were in 1807 about scorpions. The superorders Parasitiformes and Acariformes (mites and ticks) have received by far the most attention among all of the Arachnida thanks to their economic and medical/veterinary importance. Occurrences have been noted for over 1,733 species in four orders: Ixodida, Mesostigmata, Sarcoptiformes, and Trombidiformes. The first tick of the Ixodida was described in 1818. The first mite species described from Iran was of the Mesostigmata in 1982. The first member of the Sarcoptiformes named from Iran is uncertain, but the first Iranian species of the Suborder Oribatida was described in 1984 and was likely the first for the order. The first species described from Iran of the Order Trombidiformes were named in 1995. Studies on spiders started in 1874. Spiders are recorded by the occurrences of 764 species. Scorpions number 68 species in Iran and receive a lot of study and are better known compared to mites and spiders on a percentage basis, because scorpions have such a small diversity worldwide. The first Iranian species of Solifugae was described in 1895. The camel spiders are known from 67 species. Pseudoscorpions are recorded by 65 species. The Opiliones are known by 22 named species. The Amblypygi are recorded from Iran by one species described in 2018.
Volume 6, Issue 1 (No.1 (Tome 22), (Articles in Persian) 2015)
Abstract
Since the advent of amendatory or revolution in the grammar-translation method in late 19th century, the processes dominating the second language have changed considerably in the western world. In teaching Arabic language to Persian speakers, however, it is often focused on the grammar-translation method: generally, reading and comprehension and, in fact, lingual ability of the students.
In this study, we try to represent an appropriate model named ATN-D in the three areas of language learner, teacher, and style to develop communication ability in terms of needs and challenges using descriptive-analytic method. ATN-D is acronym of four methods: Audio-Lingual Method; Task-based Approach, Notional Functional Syllabus, and Desuggestopedia. We study repetition subject in order to stabilize lingual structures and vocabularies in the Audio-Lingual Method. We investigate forming a natural conversational environment and communication and action aspects in Task-based Approach, and Notional Functional Syllabus, respectively. Finally, suggestion-desuggestion is studied in Desuggestopedia method. The most significant result obtained of applying this theory is that appropriate dialogue-directed way, correct use of grammatical structures, strengthening and suggestion for ability in applying proper expression in special social situations, ability in starting, entering, cooperating and ending a conversation, as well as ability in developing a contact with correcting the conversational process and so on play a considerable role in learning two oral skills (speaking and listening) in Arabic language in order to strength and stabilize the communication ability.
Volume 6, Issue 2 (Spring 2018)
Abstract
Aims: In this study, variation in annual and seasonal rainfalls in Southeastern Anatolian Project (GAP) area was analyzed using the non-parametric and parametric approaches.
Materials and Methods: According to the aim of the study, the data sets of the seasonal and annual timescales, based on monthly rainfalls in the GAP area, including 9 rain gauges operated by Turkish State Meteorological Service, were considered in the study. Mann–Kendall (MK) and unit root test to detect the direction of an available monotonic trend in any given data were used while obtaining the magnitude of the variation with Theil–Sen slope estimator.
Findings: Based on the MK test, decreasing trend in four of the seven different time scales was observed, whereas there was an upward trend in the only two (P-III and P-IV) of the all time scales while none of the stations in the P-II period showed a monotonic trend. However, the parametric unit root test detected the existence of variation in the period III for Sanliurfa station and the period V for Sirnak station.
Conclusion: The percentage change calculated by considering the MK varied between 19 and 57%.
Volume 6, Issue 3 (9-2020)
Abstract
The catocala moth, Catocala lesbia lesbia Christoph, 1887, caught in the Ordubad district of the Nakhchivan AR is recorded for the first time for Azerbaijan fauna. A single specimen was collected using UV light trap in 2018. Geographical distribution of the species is briefly discussed.
Volume 6, Issue 21 (9-2018)
Abstract
Colors, in addition to their artificial meanings, express human emotions, thoughts and characteristics, for this reason, color in the general and modern sense and with respect to its functions and inherent elements shows the better understanding of the emotions and thoughts of the layers of the tales. Thus the authors by adopting a descriptive-analytical research methodology and by referring to the “Iranian Tales “compiled by Anjavi Shirazi try to classify the colors and their usage in these tales. The findings showed that the colors come into new usages in the narrative texture of tales which can further be divided into several categories: the expression of value and class beliefs, colors with the function of public interpretations and beliefs, symbolic beliefs, colors to serve the expression of details, expressing the aspirations of the public and mythological beliefs. With reference to such usage, colors can be divided into two categories: colors such as black, white, green, and yellow are used to express intentions, public interpretations, symbolic and value beliefs. Sometimes the colors are used with other colors to describe the details or specific functions. Golden and golden attributes of yellow are allocated to rich classes of people, and its various ranges or shads are attributed to the wishes and demands of the lower class of society.