Valoración de la calidad de imágenes panorámicas esféricas

[EN] In recent years, the production of panoramic images has been boosted by the increasing use of digital photographiccameras and mobile phones. However, for highly demanding applications such as long-range deformation monitoring, theaccuracy and quality control of panoramic images and processes used to obtain accurate 3D models should be properlyassessed. Therefore, prior to being applied in real projects, the quality of the spherical panoramic images generated bythree widely used computer programs (Agisoft Metashape, GigaPan Stitch and PTGui) is evaluated using the same imagesof a photogrammetric laboratory full of control points and an outdoor environment by shooting from several stations. Inaddition to the assessment of the geometrical accuracy, the study also includes important aspects for practical efficiencysuch as workflow, speed of processing, user-friendliness, or exporting products and formats available. The results of thecomparisons show that Agisoft Metashape meets the required geometric specifications with higher quality and has clearadvantages in performance if compared to the other two tested programs.[ES] En los últimos años, la producción de imágenes panorámicas se ha visto impulsada por el uso cada vez mayor de cámaras fotográficas digitales y teléfonos móviles. Sin embargo, deben evaluarse adecuadamente en aplicaciones altamente exigentes como la monitorización de deformaciones a grandes distancias, la precisión y el control de calidad de las imágenes panorámicas y los procesos utilizados para obtener modelos 3D precisos. Por consiguiente, antes de ser aplicadas en proyectos reales, se evalúa la calidad de las imágenes panorámicas esféricas generadas por tres programas informáticos ampliamente utilizados (Agisoft Metashape, GigaPan Stitch y PTGui) utilizando las mismas imágenes de un laboratorio fotogramétrico lleno de puntos de apoyo y del exterior desde varias estaciones. Además de la evaluación de la precisión geométrica, el estudio también incluye aspectos importantes para la eficiencia práctica como es el flujo de trabajo, la velocidad de procesamiento, la facilidad de uso o la exportación de productos y los formatos disponibles. Los resultados de las comparaciones muestran que Agisoft Metashape cumple con las especificaciones geométricas requeridas con mayor calidad y tiene claras ventajas de rendimiento si se compara con los otros dos programas testeados.Javadi, P.; Lerma, J.; García-Asenjo, L.; Garrigues, P. (2021). Quality assessment of spherical panoramic images. En Proceedings 3rd Congress in Geomatics Engineering. Editorial Universitat Politècnica de València. 7-14. https://doi.org/10.4995/CiGeo2021.2021.12728OCS71

Digital enhancement and photogrammetric recording of La Joquera Levantine rock art (Borriol, Castelló)

The heritage values of Levantine rock art, as UNESCO World Heritage since 1998 and as an Asset of Cultural Interest since 1985 according to the Spanish Heritage Act, together with its fragile nature, demand developing initiatives aimed at regularly revisiting and monitoring the sites and updating any existing records (descriptions, tracings, photographs, etc.). This is especially important for long-known sites, such as La Joquera, discovered and first graphically recorded in 1930 and for which these records have not been updated for decades. Such revisits should be aimed to: a) asses the integrity of the finds since their discovery or since the last revision; b) test whether current digital technologies can improve previous interpretations and reproductions of the art preserved there; and c) produce accurate three-dimensional (3D) photorealistic models that capture the 3D nature of this heritage and even improve the visualisation of motifs. These integral approaches are relevant to the qualitative and quantitative study of the art, as well as to its preservation and monitoring, and creation of digital archives to ensure a virtual future for Levantine art. This paper reports the technologies and methods used, the challenges faced (in terms of space available, lighting restrictions and the visual interference caused by the protective fence), and the results obtained at La Joquera rock art site as part of the 2D and 3D digital recording of the rock surface, the colour and the motifs depicted. Highlights of this paper include the identification of previously invisible weaponry and adornments of the only archer preserved on this site, as well as some other incomplete remains. Deliverables also include the production of a photorealistic model on which colour-intensified tracings are projected. This facilitates the identification of art that is now extremely faded and offers a closer look at what the site may have looked like originally

Maternal Serological Screening for Congenital Toxoplasmosis During Pregnancy and Evaluating the Pregnant Women’s Knowledge on Toxoplasmosis in Qazvin, Iran

Background: The present study was designed to determine the prevalence of Toxoplasma gondii seronegative pregnant women, estimate the frequency of fetuses at risk of congenital toxoplasmosis in the study area, and also to investigate the awareness of the studied mothers about T. gondii disease. Methods: A total of 740 pregnant women referred to two health centers in Qazvin province were surveyed voluntarily for anti-T. gondii IgG and IgM antibodies by enzyme-linked immunosorbent assay (ELISA). IgG avidity test was used as a confirmatory test for samples showing positive or borderline results for IgM antibodies. Data on socioeconomic, demographic, and knowledge of participants about toxoplasmosis were collected using questionnaires and through face-to-face interviews. Multivariable logistic regression modeling was used to identify the potential predictor variables for T. gondii infection. Results: Overall, 21.2% (157/740) and 0.27% (2/740) of pregnant women were positive for T. gondii IgG and IgM antibodies, respectively. Only 1.7% (13/740) of expectant mothers had prior information on toxoplasmosis. Among socioeconomic and demographic variables, contact with soil was the merely cause of a significant association with T. gondii infection. Other variables including age, occupation, education level, residential area, source of drinking water, abortion history, number of delivery, consumption of raw/undercooked meat, having home cat and and consumption of raw vegetables failed to establish significant associations. Conclusion: Our results clarified that the prevalence o

Molecular characterization of fasciola and dicrocoelium species isolated from ruminant livestock in Qazvin, Iran

Introduction: Fascioliasis and dicrocoeliasis are the most frequent zoonotic diseases with increasing human health problems in different parts of Iran. Two species, Fasciola hepatica (F. hepatica) and Fasciola gigantica (F. gigantica), are spread in the country. Molecular approaches have a decisive role in identifying both the species. The aim of this study was to detect Fasciola spp. and Dicrocoelium spp. by amplifying the ITS-2 and 28S rDNA gene sequence. Methods: Overall, 30 infected liver samples were collected from the livestock of Qazvin, Iran. The adult flukes were collected from different livestock. DNA extraction and PCR amplification of ribosomal RNA gene region (ITS2) and 28S rDNA gene fragment were conducted and a phylogenetic tree was constructed. Result: All the isolates obtained from the cattle (No: 7) and 82.6% (No: 19) of sheep isolates were infected with F. hepatica species, whereas 17.4% (No: 4) of sheep isolates were infected with F. gigantica. It was also shown that F. hepatica was the predominant species of Fasciola present in the region. All the specimens were infected with Dicrocoelium dendriticum (D. dendriticum). Conclusion: Both the species of Fasciola were found in Qazvin. D. dendriticum was the sole infecting species of the Dicrocoelium genus in the livestock of the city of Qazvin. Further research studies are needed to determine the intermediate host of the parasites in the region

Screening and molecular characterization of Trichomonas vaginalis genotypes isolated from married women in northern Iran

. Trichomonas vaginalis is an anaerobic protozoan parasite that causes trichomonosis in human. It is one of the most common non-viral sexually transmitted infections. It has been found to be most prevalent in patients referred to sexually transmitted disease clinics. In recent years, molecular methods have been used to identify genotypes of this parasite in different parts of the world and so far 6 types of T. vaginalis have identified. The aim of this study was to investigate the prevalence and genotype identification of T. vaginalis from married women in northern Iran. A total of 450 vaginal specimens were taken from married women, referring to health centers in northern Iran. Demographic information of women was collected through a questionnaire. The samples were first examined microscopically and then monitored in Dorsch culture medium for up to 10 days. Actin genes of positive samples were amplified by PCR. Finally, PCR products were used to determine the sequence and genotype of the parasite. Overall, 0.7% (3/450) samples were positive for T. vaginalis. All of the three infected women were housewives. After sequencing, the genotype of these parasites were type H (66.7%) (Accession no; MW414672-MW414673) and type E (33.3%) (Accession no; MW414671). Low prevalence of T. vaginalis in north of Iran indicate high level of hygiene in sexual intercourse and avoiding from high risk sexual behaviors, and also it seems that genotype H is dominant type of the parasite in the study area

Isolation and Identification of Free Living Amoeba from Patients and Contact Lens Users in Iran

Background: Free-living amoebae (FLA) such as Acanthamoeba spp., are considered as opportunistic and pathogenic protozoans. Acanthamoeba granulomatous encephalitis (AGE) is a serious threat for immunodeficient patients and Acanthamoeba keratitis (AK) for contact lens users. We aimed to identify the presence of free living amoebae in nasal swabs of patients and contact lens users in Qazvin, Iran. Methods: During 2019, 251 nasal and oral swabs (including the pharynx and mouth) were collected from patients with diabetes, AIDS and those under periodic dialysis in Qazvin, Iran. In addition, 27 soft contact lenses were collected from the participants. Following DNA extraction, PCR and sequencing were conducted to identify the genotypes of the amoeba. Phylogenetic analysis of the identified sequences was performed using MEGA 7 software. Results: A strain of Acanthamoeba belonging to the T3 genotype was isolated from hemodialysis patients. Two specimens of Acanthamoeba with T3 genotype were isolated from keratitis patients. Conclusion: The clinicians should pay attention to the possible complication of this organism because this amoeba is potentially pathogenic for immunocompromised patients. Since the amoeba is present in environmental resources, the use of contact lenses should be accompanied by considering proper hygien

Impact of E-Service Quality on Sustaining Competitive Advantage for Iranian IT Firms

Sustaining competitive advantage is one of the most concerns of companies in order to compete with rivals for attract new customers and keep the existence. Several strategies to keep advantages were in object in different segments and different marketplace. Companies are trying to work on strategies with proper drivers and resources to sustain advantages. One of these drivers is service quality which was a determinant factor for customers and their perception about different firms. With increased portion of Internet in business, all these discussions shift in to the cyber space. In other words, firms are trying to sustain competitive advantage on the Internet through different ways. Delivering E-service to the customers, E-service quality and its dimensions is of importance to customers and decision makers. In this study, we discuss about terms of strategies which firms can sustain competitive advantage especially through the Internet and then discuss about service and e-service quality aspects and dimensions to answer our research question: what is the influence of e-service quality on sustaining competitive advantage for firms? We have generalized five hypotheses for this agenda after extracting proper factors for e-service quality in frame of reference. Then we have used deductive approach to this survey and applied quantitative data collection to distribute our questionnaire among our samples which consists of Iranian IT firms segment. After collecting data, evaluating validity and reliability of statistical analysis is going to perform to find the impact of e-service quality on sustaining competitive advantage e. Finally based on results from data analysis, we will find a significant relation and influence between e-service quality of Iranian IT firms and sustainability of their advantage through the rivals which this results indicate that in Iran's e-marketplace (as a developing country) firms can be differentiated from each other easily through superior e-service quality which they offer.Validerat; 20111116 (anonymous

Impact of E-Service Quality on Sustaining Competitive Advantage for Iranian IT Firms

Sustaining competitive advantage is one of the most concerns of companies in order to compete with rivals for attract new customers and keep the existence. Several strategies to keep advantages were in object in different segments and different marketplace. Companies are trying to work on strategies with proper drivers and resources to sustain advantages. One of these drivers is service quality which was a determinant factor for customers and their perception about different firms. With increased portion of Internet in business, all these discussions shift in to the cyber space. In other words, firms are trying to sustain competitive advantage on the Internet through different ways. Delivering E-service to the customers, E-service quality and its dimensions is of importance to customers and decision makers. In this study, we discuss about terms of strategies which firms can sustain competitive advantage especially through the Internet and then discuss about service and e-service quality aspects and dimensions to answer our research question: what is the influence of e-service quality on sustaining competitive advantage for firms? We have generalized five hypotheses for this agenda after extracting proper factors for e-service quality in frame of reference. Then we have used deductive approach to this survey and applied quantitative data collection to distribute our questionnaire among our samples which consists of Iranian IT firms segment. After collecting data, evaluating validity and reliability of statistical analysis is going to perform to find the impact of e-service quality on sustaining competitive advantage e. Finally based on results from data analysis, we will find a significant relation and influence between e-service quality of Iranian IT firms and sustainability of their advantage through the rivals which this results indicate that in Iran's e-marketplace (as a developing country) firms can be differentiated from each other easily through superior e-service quality which they offer.Validerat; 20111116 (anonymous

بررسی اپیدمیولوژیک توکسوکارا در سگ هاي خانگی و نمونه هاي خاك وچمن پارك هاي عمومی شهرستان تاکستان و شناسایی مولکولی ایزوله ها

مقدمه: توکسوکارا (آسکارید سگ و گربه) از نمانودهاي انگلی روده اي منتقله از خاك و عامل توکسوکاریازیس در انسان است. این انگل انتشار جهانی داشته و در مناطق گرمسیري و تحت گرمسیري شایع تر است. گونه هاي آن شامل توکسوکارا کنیس و توکسوکاراکتی است که به ترتیب به آسکارید سگ و گربه شناخته می شوند. خاك به عنوان مخـزن نگـه داري تخم هـاي انگـل توکسوکارا اهمیت ویـژه اي در انتشار این بیماري دارد. مواد و روش‌ها: در این مطالعه تعداد 200 نمونه مدفوع سگ خانگی با روش اسمیر مستقیم و روش تغلیظ فرمالین اتیل استات به همراه پرسشنامه و تعداد 200 نمونه خاک و چمن پارک های عمومی شهرستان تاکستان با روش سدیمانتاسیون –فلوتاسیون سولفات روی در سال 1400-1399 انجام شد. ایزوله های بدست آمده از مدفوع سگ ها با استفاده از ژن ITS-2 بررسی شدند. نتایج: به طور کلی 4 نمونه(2 %) نمونه های مدفوع و 13 نمونه(66/8 %) از نمونه های خاک پارک های عمومی از نظر آلودگی به تخم توکسوکارا مثبت بودند. از مجموع 50 نمونه چمن هیچ گونه آلودگی به تخم توکسوکارا مشاهده نشد. پس از استخراج DNA سه نمونه تخم توکسوکارا از مجموع 4 تخم، و تکثیر ژن ITS-2 تمام موارد توکسوکارا کنیس شناسایی شدند. نتیجه گیری: شیوع توکسوکارا در سگ های خانگی 2 % ، در خاک پارک های عمومی 66/8 % و در چمن الودگی به تخم توکسوکارا گزارش نشد. موارد مثبت توکسوکارا در نمونه سگ ها پس از تکثیر ژن ITS-2 هر سه مورد توکسوکارا کنیس شناسایی شد. کلید واژه ها: توکسوکارا، مولکولار اپیدمیولوژی، تاکستا