Gasket Design for Alkylation Units & Other Possible Dangerous Liquid Media

2021 ◽  
Author(s):  
Dale Norman ◽  
Gustavo Navarrete
Keyword(s):  
Stress Test ◽  
Test Results ◽  
Liquid Media ◽  
Test Methodology ◽  
Life Threatening ◽  
The Media ◽  
Dye Penetrant ◽  
Flexible Graphite ◽  
The Relationship ◽  
Design And Testing

Abstract The design and testing of gaskets for severe, possibly life threatening, liquid media, like hydrofluoric acid, is critical and difficult. This paper shows the relationship between basic gasket stress calculations, of applied load over the gasket sealing area, actual gasket stress test results, and dye penetrant test results. The gasket designs evaluated will be from across the industry and follow the typical design of having expanded PTFE (ePTFE) as the inner sealing element for the harsh media and a redundant flexible graphite sealing element that will seal the media as well as give an expected fire test rating. The gaskets tested had different structural designs for sealing the media as well as providing corrosive protection for the clamping flanges. There was both supported and unsupported ePTFE sealing elements. Some designs are new, and one has been in service for years. The basic calculations typically used to determine adequate gasket stress showed that all the gaskets should seal effectively. The question is: Would they all equally help protect the flange face from corrosive damage? The data from the actual applied gasket stress correlates nearly perfectly to the dye penetrant results but varies from expected stress distribution of the typical gasket stress calculation. The paper will cover the theoretical calculation approach, the test methodology for the actual applied gasket stress, the methods for ensuring applicable dye penetrant testing and comparing the results to each other. The results show that under equal clamping loads, the different structural designs directly impact the ability for fluid to penetrate the ePTFE section of the gaskets.

scholarly journals Ultrasound Detection of the Aquarium Sign at the Bedside

2020 ◽  
Author(s):  
Mihiro Kaga ◽  
Emi Yamashita ◽  
Takeshi Ueda
Keyword(s):  
Point Of Care ◽  
Point Of Care Ultrasound ◽  
Test Results ◽  
Mesenteric Ischaemia ◽  
Contrast Enhanced ◽  
Life Threatening ◽  
Hepatic Portal ◽  
The Right ◽  
Enhanced Computed Tomography ◽  
The Relationship

Objectives: The aquarium sign is the name given to a large quantity of bubble-like echoes that suggests the presence of hepatic portal venous gas (HPVG). Few studies in the literature have addressed the relationship between the aquarium sign and HPVG. In some cases, HPVG can only be detected using ultrasonography. HPVG can be observed in a variety of conditions, including those that require emergency surgery, such as acute mesenteric ischaemia (AMI). Therefore, it is important to identify the presence of HPVG as soon as possible.  Materials and methods: We report a case of the aquarium sign, where bubble-like echoes flowed from the right atrium towards the right ventricle, which was identified using bedside cardiac ultrasonography as part of a point-of-care ultrasound test. Results: This aquarium sign finding led to the diagnosis of AMI, which was confirmed using contrast-enhanced computed tomography (CT).  Conclusion: The aquarium sign is a useful finding suggestive of HPVG and mesenteric ischaemia, which can be rapidly and easily observed using bedside cardiac ultrasonography. However, there are very few reports on the aquarium sign. The inability of other more cumbersome diagnostic imaging modalities, such as CT and magnetic resonance imaging, to detect HPVG emphasizes the utility and convenience of detecting the aquarium sign using bedside ultrasonography. This technique can lead to early detection of life-threatening diseases as well as improve the prognosis for patients. The diagnostic implications of the aquarium sign for HPVG are still unclear and require further research.

Persepsi Pengunjung Pada Museum Sebagai Tempat Tujuan Wisata Dan Media Pendidikan Non-Formal Untuk Meningkatkan Apresiasi Nilai-Nilai Kejuangan

2015 ◽  
Vol 2 (1) ◽  
pp. 62-74
Author(s):  
Jazuli Ahmad
Keyword(s):  
Formal Education ◽  
Sampling Method ◽  
P Value ◽  
Test Results ◽  
Purposive Sampling ◽  
Museum Management ◽  
Significant Difference ◽  
The Media ◽  
The Relationship ◽  
Better Than

This research is motivated by the significant difference between the museum visitor in Yogyakarta. The purpose of this study is to determine whether any differences in the perception of visitors of the museum as a tourist destination, the media of non-formal education as an object to increase the appreciation to historical values. The population in this study are all visitors who comes to the museum in Yogyakarta. Total of samples are 120 respondents and using purposive sampling method. Purposive sampling included in non-probability sampling techniques.Based on statistical data analysis, the statement in this research is valid and reliable because that is consistent and reliable fixed anytime and by anyone who will conduct research in a similar context. While the Chi quare test showed no visitors who have different perceptions and there is a visitor who does not have different perceptions of the factors that affect visitors to the museum in Yogyakarta. This can be seen from the results of the P value (Asymp. Sig.)> 0.05 and P value (Asymp. Sig.) <0.05. And for crosstab test results also showed no variables are interrelated and there is a variable that does not have a relationship because there is a calculated value of > table and calculate the < table.To maintain and increase the number of visitor, museum management should strive to improve and enhance the indicators that have value Asymp Sig. > 0.05 so that the perception of the museum’s visitors better than before. Meanwhile, in order to compete in the competitive business engaged in the service, the museum should improve the relationship between the variables and the other variables especially those with a low count .Keywords: perception, Museum in Yogyakarta

scholarly journals Reflexive and project-based forms of psychological and anthropological practice of developing creativity in children

2021 ◽  
Vol 117 ◽  
pp. 04002
Author(s):  
Natalia B. Kovaleva ◽  
Аnastasiya I. D’yakonova
Keyword(s):  
Children And Adolescents ◽  
Personal Development ◽  
Value Orientations ◽  
Growing Up ◽  
Creative Development ◽  
Resource Potential ◽  
Media Environment ◽  
The Media ◽  
The Relationship ◽  
Design And Testing

The article deals with the possibilities of reflexive and project-based forms of anthropological practice which make it possible to create an environment for the development of the individual’s creative orientation and creativity in the context of the modern media environment. The authors focus on the design and testing of innovative technologies in the field of humanities in the rapidly changing conditions of children and adolescents who are growing up in the digital environment of the 21st century. The specific features of the media environment in terms of determining the anthropological imperative of the educational prototype are examined. Based on theoretical and practical developments, the principles of deploying such technologies in the format of educational anthropological practices are demonstrated. The authors substantiate the resource potential of co-creative forms of psychological and pedagogical anthropological practice based on the original reflexive-positional approach to the personal development of children in primary and secondary school. The emphasis is on the presentation of two reflexive-positional technologies that have proven their practical efficiency/ These technologies are based on the principles of project reflection, namely, plot and activity-based game and mediahermeneutics. The principles of creating a transformative socio-cultural educational environment that initiates the development of giftedness and creativity of children and adolescents in mediahermeneutics technologies are described in detail. The authors provide the results of a comprehensive study of the personality and creativity development among children and adolescents based on reflexive and project-based technologies of psychological and pedagogical anthropological practices to identify the relationship between the personal and creative development of children and adolescents participating in programs built using mediahermeneutics. The discussion of the results allows one to conclude that project-based and reflexive forms of anthropological practice, when properly organized, in particular using the principles of mediahermeneutics, contribute to the development of spiritual value orientations, creative focus, cognitive and aesthetic motivation and create the environment for the manifestation of adolescent giftedness.

Problematic Internet Use digunakan Ketika Kesepian pada Remaja

2020 ◽  
Vol 14 (1) ◽  
pp. 45-60
Author(s):  
Yashinta Yashinta ◽  
Dwi Hurriyati
Keyword(s):  
Internet Use ◽  
Hypothesis Test ◽  
Problematic Internet Use ◽  
Coefficient Of Determination ◽  
Test Results ◽  
Research Subjects ◽  
Significance Level ◽  
Relationship Of ◽  
The Relationship ◽  
Effective Contribution

This study aims to determine the relationship of loneliness with problematic internet use on boarding students on Silaberanti street in Siantan jaya Opposite Ulu 1 Palembang city. Research subjects numbered 220 people using random sampling methods. Data was collected using a 60 item problematic internet use scale and a 60 item loneliness. Realibility is generated on scale of problematic internet use of 0,955 and loneliness of 0,946.Hypothesis testing uses product moment correlation analysis techniques. Hypothesis test results showed a positive relationshif between loneliness with problematic internet use on boarding students on Silaberanti street in Siantan jaya Opposite Ulu 1 Palembang city r= 0,684 with a significance level of 0,000 (p<0,01). Loneliness in this study made an effective contribution of 46,8% to problematic internet use which can be seen from the coefficient of determination (r²) that is equel to 0,468.

Life-threatening Takotsubo Cardiomyopathy

2011 ◽  
Vol 9 (2) ◽  
pp. 119 ◽  
Author(s):  
Karen Mrejen-Shakin ◽  
Ricardo Lopez ◽  
Mohandas M Shenoy ◽  
◽  
◽  
...  
Keyword(s):  
Heart Failure ◽  
Left Ventricle ◽  
Acute Heart Failure ◽  
Takotsubo Cardiomyopathy ◽  
Stress Test ◽  
Systolic Dysfunction ◽  
Apical Ballooning ◽  
Assisted Ventilation ◽  
Two Dimensional ◽  
Life Threatening

Objective:To report a case of seizure-induced takotsubo cardiomyopathy with rare etiology and rarer complications.Methods:A 50-year-old woman had multiple epileptic seizures and later developed acute heart failure complicated by ventricular fibrillation and shock. A two-dimensional echocardiogram revealed apical ballooning of the left ventricle resembling a takotsubo (a Japanese fisherman's pot used to trap octopi). The apex was also hypokinetic.Results:The hemodynamic abnormalities normalized with defibrillation, assisted ventilation, inotropic support, and pressor agents. More importantly, the apical ballooning deformity and systolic dysfunction reversed. The echocardiogram normalized three months later. A nuclear treadmill stress test was negative for ischemia.Conclusions:Apical ballooning of the left ventricle and hypokinesis are typical echocardiographic features in takotsubo cardiomyopathy, a stress-induced heart disease. It may follow severe emotional, physical, and neurologic stressors, in our rare case, grand mal seizures (0.2 % of all takotsubo disease patients). Also rare are life-threatening complications. Based on these observations, in a case with severe stress followed by acute heart failure, takotsubo cardiomyopathy should be a major diagnostic consideration. The dramatic initial triggering event, in our case an epileptic seizure, should not mask the possibility of coexisting takotsubo cardiomyopathy. Awareness of this disease, anticipation of complications, and two-dimensional echocardiography will help channel the management in the right direction.

Diversification propaganda work with foreign audiences

2020 ◽  
Vol 4 (4(13)) ◽  
pp. 31-50
Author(s):  
Shiyu Zhang ◽  
Keyword(s):  
Developing Countries ◽  
International Relations ◽  
Strategic Partnership ◽  
The Past ◽  
Bilateral Relations ◽  
The Media ◽  
The Relationship

Over the past decade, bilateral relations between China and Russia have attracted the attention of the whole world. As neighbors and rapidly developing countries, China and Russia are becoming increasingly important in the international arena. The strategic partnership and interaction between China and Russia occupy a significant place in the politics of both countries. Cooperation is developing dynamically in various fields, primarily in politics. After 2012, a change of government took place in China and Russia, which brought new changes to international relations. Studying the involvement of the media in this process can clarify their impact on international relations, in particular, their role in the relationship between China and Russia.

Sunlight exposure: the effects on the performance of paragliding fabric

2018 ◽  
Vol 69 (05) ◽  
pp. 381-389
Author(s):  
MENGÜÇ GAMZE SÜPÜREN ◽  
TEMEL EMRAH ◽  
BOZDOĞAN FARUK
Keyword(s):  
Mechanical Properties ◽  
Aging Process ◽  
Air Permeability ◽  
Sunlight Exposure ◽  
Test Results ◽  
Coating Materials ◽  
Strength Tests ◽  
Before And After ◽  
The Relationship ◽  
Dark Blue

This study was designed to explore the relationship between sunlight exposure and the mechanical properties of paragliding fabrics which have different colors, densities, yarn counts, and coating materials. This study exposed 5 different colors of paragliding fabrics (red, turquoise, dark blue, orange, and white) to intense sunlight for 150 hours during the summer from 9:00 a.m. to 3:00 p.m. for 5 days a week for 5 weeks. Before and after the UV radiation aging process, the air permeability, tensile strength, tear strength, and bursting strength tests were performed. Test results were also evaluated using statistical methods. According to the results, the fading of the turquoise fabric was found to be the highest among the studied fabrics. It was determined that there is a significant decrease in the mechanical properties of the fabrics after sunlight exposure. After aging, the fabrics become considerably weaker in the case of mechanical properties due to the degradation in both the dyestuff and macromolecular structure of the fiber

Adolescent smoking behavior and communication with parents: Depression as a mediator and gender as a moderator

2019 ◽  
Vol 47 (10) ◽  
pp. 1-9 ◽  
Author(s):  
Xieping Chen ◽  
Qian Xie ◽  
Yuting Yang
Keyword(s):  
Smoking Behavior ◽  
Depression Scale ◽  
Epidemiological Studies ◽  
Adolescent Smoking ◽  
Junior High Schools ◽  
Test Results ◽  
Negative Effect ◽  
And Gender ◽  
The Relationship ◽  
Communication Scale

Parent–adolescent communication is assumed to be an important factor affecting adolescent smoking behavior. However, the inner mechanism accounting for this association has still not been clarified in research. Our purpose in this study was to examine the relationships between parent–adolescent communication, adolescent smoking behavior, and depression, as well as gender differences in the relationship between depression and adolescent smoking behavior. Participants were 1,134 students at 6 junior high schools in China who completed the Parent-Adolescent Communication Scale, the Epidemiological Studies Depression Scale, and the Smoking Behavior Test. Results showed that parent-adolescent communication had a significant negative effect on adolescent smoking behavior and depression partially mediated the relationship between parent–adolescent communication and adolescent smoking behavior. In addition, gender moderated the relationship between depression and adolescent smoking behavior. Overall, these findings may help to promote better understanding of the relationship between parent–adolescent communication and adolescent smoking behavior.

Sign in / Sign up

Export Citation Format

Share Document