A Thermal Enclosure Prototype For A Suspended Inertial Sensor

Although Ligo has detected six gravitational waves so far, people are still conducting research to improve the sensitivity of the detectors in different aspects. At low frequency band, one of the main sources of noise is seismic vibration. Lowering the noise level in this band, helps us to follow the coalescence of compact binary systems earlier in their transformation and increase the signal-to-noise ratio. It also allows us to detect merger of more massive objects. Hence, an isolation system is required to reduce the seismic noise. As a part of isolation system (which can be a passive or an active isolation), inertial sensors play an important role in monitoring the seismic vibration and disturbances. However, these sensors have a weakness. They cannot distinguish between translation motion and tilt motion at low frequency and the signal is dominated by tilt motion. One solution could be suspending the inertial sensor to attenuate the transmitted tilt to the sensor. Nevertheless, suspending the sensor makes it sensitive to any external excitation such as air current. I have designed and built a thermal enclosure for the suspended sensor to minimize the effect of the air current, and reduce the ambient temperature variations. The theoretical model of the enclosure, as well as the experimental measurements are presented in this study. The results show that the horizontal motion of the suspended sensor is decreased by several orders of magnitude after using the thermal enclosure

Farahan Carpet Designs and Patterns with a Focus on Farahan Carpet Products

Markazi province is one of the long-standing centers of Iranian carpet weaving. Farahan is a large area of ​​Markazi province that includes more than 200 villages and weaving centers. Sarough, as a prominent Iranian carpet brand, is one of the most important centers of carpet weaving in Farahan. Farahan carpet, which has been the origination and the first carpet of Markazi province, began to grow, develop, and flourish in the middle of the Qajar period due to the presence of Tabriz merchants and then the establishment of foreign companies in Sultanabad. It was at this time that Farahan Carpet found its true identity with the help of a coherent and coordinated management and exemplary quality of production.Currently, Farahan and Sarough carpets are presented in the most prestigious museums, collections, and galleries around the world. The quality of weaving, brightness and sparkle of colors, and beautiful and varied patterns (which are the result of the attitude, taste, talent, and imagination of Iranian designer artists) have made them unique. As a result, during the ups and downs of economics and art caused by global challenges, they have always been interesting, as components of identity and quality, for the manufacturers in all eras, especially the recent decades. Farahan Carpet Company is one of the most prominent manufacturers of Farahan carpet, which has been working in this field for almost six decades. This company is based on indigenous, national, and transnational standards and consciously follows a purpose. It examines the needs of the market and the customers in order to offer coherent products with two traditional and modern approaches. The destination and target markets of most of these products include the United States, Europe, and the Far East. In Farahan Carpet, all the steps and production processes from the beginning to the end are performed under the supervision of the company's managers and experts. The lack of resources in the field of Farahan carpets highlights the need for this research. In sources which briefly refer the carpets of Markazi province and its subordinate cities and villages, such as "Persian carpet" (Edwards, 1989), "Persian carpets" (Hangeldin, 1996), "Ghalin” (Sabahi, 2014), “Study of Persian Carpet” (Jouleh, 2011), and “Golden Sunset of Sarough Carpet” (Sooresrafil, 1993), there have also been some brief and general references to Farahan carpet and its villages, such as Sarough. In addition, in recent years, studies have been conducted on the carpets of Markazi province (Arak, Farahan, Sarough and Jirya), namely "review, analysis, and introduction of native and original designs and patterns of Arak Carpet weaving school (Sultanabad)" (Afroogh, 2017) and "Study, analysis, and introduction of new and imported (adapted) designs and patterns in the contemporary carpets of Arak (Sultanabad)” (Afrough, 2018). The present study aimed to introduce the Farahan carpet-weaving school and the design and patterns of its carpets in order to study, investigate, and introduce the Farahan Carpet company and its products

Accuracy of 64-multidetector computed tomography in diagnosis of adnexal tumors

<p>Abstract</p> <p>Background</p> <p>Adnexal cancers are in fifth place among the tumors with the highest mortality in the female population. The aim of the present study was to evaluate the accuracy of Multi-detector computed tomography (MDCT) on a 64-multislice CT scanner in the detection and differentiation of adnexal masses stages.</p> <p>Methods</p> <p>During the present prospective study, 95 women with a primary diagnosis of ovarian mass in base of clinical examination and ultrasonographic findings underwent preoperative evaluation by a 64-slice MDCT with a section thickness of 0.6 mm, 50% overlap and reconstructed images. Afterward, results of MDCT were compared with surgical and histopathological findings, and the sensitivity, specificity, positive and negative predictive value and accuracy were determined.</p> <p>Results</p> <p>The mean age of patients was 48.63 ± 13.93 years. MDCT diagnosed 25 (26.3%) masses to be benign and 70 (73.7%) to be malignant (sensitivity, specificity, positive and negative predictive value and accuracy were 92.8%, 88.0%, 95.5%, 81.4% and 91.5% respectively). The sensitivity and specificity of MDCT in determining local extension was 72.2% and 93.4% respectively. And the sensitivity and specificity of MDCT in determining peritoneal seeding and liver extension was 81.8% and 93% respectively. Estimated stage was significantly agreed with the surgical (Cohen's Kappa (κ) = 0.891) and histopathological findings (κ = 0.858).</p> <p>Conclusion</p> <p>MDCT is a highly sensitive and specific diagnostic method in evaluation of adnexal masses and successfully stage the tumor in consistent with surgery and histopathology.</p

Analyzing the Structural and Aesthetic Elements of Sarouk Rugs of the Claremont Collection

Problem Definition: Sarouk rugs are one of the most crucial rug brands in Iran and one of the most famous rugs among the world audience, which were produced from the middle of the 19th century until the beginning of World War II under the management of French companies, especially Ziegler. There are samples of these rugs with Corner and Medallion designs and a unique structure in the Claremont collection, which differ from common samples regarding the type of design pattern. The limitation of comprehensive and salient research resources about Sarouk rug and its exquisite and export samples that were produced in the past reveals more of the necessity of research on this issue. The main research question is "What are the features, visual qualities, and structural elements of Claremont Collection rugs?"Objective: In the present research, the structural elements of Sarouk rugs of the last quarter of the 19th century, which are preserved in the Claremont Collection, will be analyzed. This article's structural and aesthetic elements include the background space, Medallion (Toranj) and space above Medallion (Sar Toranj), Corner, Margins, and the colors used.Research Method: This research is qualitative and fundamental, and the research method is descriptive-analytical. The method of collecting data is library-based in addition to searching the websites.Results: The Sarouk rugs produced in the late 19th century, which were woven for export, are all of the Corner and Medallion design and are unique in their design pattern and color. They are often produced on large scales with vegetable dyes. The color of the Margin and background change between red, navy, and ivory colors. In some rugs, the color of the central Medallion is the same as that of the Margin and Corner. All these rugs are various in Corner and Medallion design, and the central Medallion forms the structure and identity of Shakhe Shekasteh motifs (cursive-curve). The structure of the designing pattern, the logical color scheme and the visual order of the motifs are the differences between Sarouk rugs and other Iranian rugs

Examination and Analysis of designs on the Mosul Ewers (Case Studies: Ewer of Ahmad Zakki-ol-Naghash Mosuli, Ewer of Younes ibn Yousef Mouseli, Ewer of Ghasem ibn Ali Mosuli, Ewer of Ibrahim ibn Mavaliai Mosuli)

Ewers are among the most important metal artifacts in the Islamic art and civilization. The most magnificent examples of ewers can be seen during the 4th-7th Hijri centuries concurrent with Seljuk, Ilkhanate dynasties in Iran, built by the artists of Khorasan and Mosul metalworking schools. Taking advantage of available quality materials, innovative building techniques, delicate decorations, various themes (adopted from Sasanid and Seljuk dynasties), Mosul turned to one of the most famous centers of metalwork in the Islamic world in the 6th and specially in the 7th centuries. Among the metalwork of Mosul, jeweled ewers, in various shapes and sizes, are noteworthy some of which are kept now in the most prestigious art museums of the world. In the present study, four of these ewers have been examined and analyzed in terms of building techniques, themes and decorations applied. The results indicate that in terms of the building techniques, mainly metals and alloys such as copper, gold, silver, brass (alloy of copper and zinc) and gunmetal (an alloy of copper, tin and lead) have been used. Also, in terms of forming and casting methods, a wide variety of decorations such as lattice work, incrustation, bejeweled work and inlay (fixing gold, silver or copper pieces into another metal background) have been applied. Similarly, scenes of hunting, battleground, music, sports, women making up, royal and court life scenes, a king sitting on the throne cross-legged have been the most common themes applied in the ewers. The data were collected based on library and museum sources and the methodology was descriptive-analyti

The visual analysis of the motifs of Tal Bakun pottery and their application in fabric design

Problem Definition: The wooden door of the tomb of four kings in Lahijan is one of the woodcarvings works available in the National Museum of Iran, which has a special value in terms of antiquity and beauty, as well as the inscriptions used in it. This door belongs to the Kiya dynasty that ruled in the northern regions of Iran at the same time as the Safavid period. Several prestigious artworks have been left from the Kiya period, including the woodcarving technique, one of which is the tomb of four kings of Lahijan and its ancient door. The present research seeks to answer the question of what are the motifs of the mentioned door and also the themes used in it and also identify the themes and contents of this historical work.Objective: The aim of this research is to get acquainted with the Kiya’s art in the northern region of Iran and also to get acquainted with the visual and architectural elements of the region.Research Method: The present study has been conducted based on the library resources and historical perspective in a descriptive-analytical manner.Results: The plant motifs including arabesque and khatai have been used with remarkable elegance and variety in the decorations of the door of the tomb of four kings, all of which are the common motifs of the Safavid period. The most used line in inscriptions is the thuluth. Moreover, the themes of the inscriptions also include historical prayers and poetry. In general, by examining the characteristics of this work, it can be stated that the Kiaya government, like the Safavid rulers of their time, have perfectly considered the visual principles of the motif

Effects of Tyrode's solution osmolarities and milk on bull sperm storage above zero temperatures

Background: Control of the medium osmolarity and temperature during long or short time sperm manipulation is essential.Objective: The objectives of the present study were to find the effects of different osmolarities of modified Tyrode's solution and milk on the bull sperm during incubation at above zero temperatures.Materials and Methods: Semen samples were collected twice from five Najdi bull. Centrifuged and most parts of seminal plasma were removed. First experiment: The concentrated semen were splited into nine aliquots to incubate in three different osmolarities (200, 300 and 400 mOsm) at three temperatures (5, 25 and 39°C) for 15 and 60 min of incubation. Second experiment: The semen samples were splited, mixed with the same volume of whole cow milk (5 and 25°C) and milk with 7% glycerol (5°C) and incubated for 15 and 60 min. Results: Sperm motility severely affected (p<0.05) by incubation at low ionic tension (200 mOsm/l) especially at low temperature (5°C). The impact of low osmolarity on sperm viability can reduce by increasing the incubation temperature to 39°C. The decreased sperm motility, which was induced by lowering osmolarity, was not improved (p>0.05) by increasing temperature during 1 h of incubation. Milk can protect the sperm viability and motility at cool conditions and there is no beneficial effect of glycerol in combination of milk on sperm incubation at above zero temperatures (p<0.05).Conclusion: Iso- and hyper-osmotic solutions protect bull sperm motility and viability at 25 and 39°C, while milk can be used for protecting sperm at 5°C

The renal toxicity of hydroalcoholic extract of Stachys lavandulifolia Vahl in Wistar rats

Stachys lavandulifolia is used as the herbal tea in gastrointestinal disorders. It is believed that this plant has beneficial curative properties. However, more studies are needed to determine the toxic effects of plant. The aim of this study was to evaluate the nephrotoxicity of hydro-alcoholic extract of Stachys lavandulifolia Vahl on male Wistar rats. In this experimental study, 100 adult male Wistar rats (200-250 g) were divided into 5 groups of 20; including one control and 4 experimental groups, and injected i.p saline or Stachys lavandulifolia Vahl extract (50,100,150 and 200 mg/kg) for 1 month. Then sampling was done from half of the animas of each group. The left animals in each group were held without injection for one more month and then sampling was done. In the groups that Stachys lavandulifolia Vahl extract were used for one month, a mild degeneration of renal tubular epithelial cell was observable. However, in the second month of the study, the histologic lesions were significantly more (P<0.05). Stachys lavandulifolia Vahl extract has renal tubular toxicity and this toxicity may continue even following drug discontinuation. However, further studies need to evaluate renal complications of this drug in human. Taghikhani M, Nasri H, Asgari A, Afrough H, Namjoo AR, Ansari-Samani R, Shahinfard N and Rafieian-kopaei. The renal toxicity of hydro-alcoholic extract of Stachys lavandulifolia Vahl in Wistar rats. Life Sci J 2012;9(4):3025-3031] (ISSN:1097-8135). http://www.lifesciencesite.com. 44