Physical Properties of Natural and Synthetic Rubber Materials at Low Temperatures

1953 ◽  
Vol 26 (1) ◽  
pp. 166-180
Author(s):  
J. Z. Lichtman ◽  
C. K. Chatten
Keyword(s):  
Physical Properties ◽  
Low Temperatures ◽  
Test Method ◽  
The Other ◽  
Atmospheric Aging ◽  
Synthetic Rubber ◽  
Other Hand ◽  
Liquid Immersion ◽  
Stiffness Characteristics ◽  
Made In

Abstract A torsional apparatus and a hardness indentation tester have been found to be essentially equivalent for use in evaluating the stiffness characteristics of elastomers over a range of low temperatures. The torsion apparatus, requiring the use of relatively small specimens, facilitates carrying out various conditioning cycles on a material, such as liquid immersion or atmospheric aging. The indentometer, on the other hand, permits the employment of larger sized specimens or even samples, such as relatively thick gasket stocks. There are, then, individual advantages in each apparatus which would determine the choice to be made in selecting a test method for a particular specification.

Dziedzictwo dawnej Rzeczypospolitej w języku pierwszego polskiego przekładu poematu „Metai” Kristijonasa Donelaitisa

2021 ◽  
Vol 12 (2) ◽  
pp. 383-400
Author(s):  
Jolanta Mędelska
Keyword(s):  
Eighteenth Century ◽  
The Other ◽  
Political Journalism ◽  
Other Hand ◽  
Polish Language ◽  
Influence Of Substrate ◽  
The One ◽  
Made In

The author analysed the language of the first Polish translation of the eighteenth-century poem “Metai” [The Seasons] by Kristijonas Donelaitis, a Lithuanian Lutheran pastor. The translation was made in 1933 by a socialist activist and close associate of Józef Piłsudski, Kazimierz Pietkiewicz. The analysis showed that the language of the translation is peculiar. On the one hand, this peculiarity consists in refraining from archaizing the translation and the use of elements that are close to the translator’s style of social-political journalism (e.g., dorobkiewicz [vulgarian], feministka [feminist]), on the other hand, the presence at all levels of language of peculiarities characteristic for Kresy Polish language in both its territorial variations. These are generally old features of common Polish, the retention of which in the eastern areas of the Polish Rzeczpospolita was supported by the influence of substrate languages, later also Russian, or by borrowing. This layer was natural in the language of the translator, born in Ukraine, who spent part of his life in Vilnius, some in exile in Russia. This is the colourful linguistic heritage of the former Republic of Poland.

scholarly journals FORMULASI MASKER GEL PEEL-OFF PERASAN LIDAH BUAYA (Aloe vera L.) DENGAN GELLING AGENT POLIVINIL ALKOHOL

2020 ◽  
Vol 2 (1) ◽  
pp. 17-25
Author(s):  
Ivan Santoso ◽  
Tria Prayoga ◽  
Ika Agustina ◽  
Wiwit Setya Rahayu
Keyword(s):  
Polyvinyl Alcohol ◽  
Aloe Vera ◽  
The Other ◽  
Local People ◽  
Gelling Agent ◽  
Drying Time ◽  
Other Hand ◽  
One Way Anova ◽  
Made In

Aloe vera (Aloe Vera L.) is a plant which commonly used by local people as moisturizer. The usage of aloe vera can be applied in form of peeled off gel mask with polyvinyl alcohol as gelling agent. The goal of this research is to determine the influence of increase of polyvinyl alcohol as gelling agent to the formulation of peeled off mask from aloe vera juice. The formulation was made in a few concentration, 10%, 12%, and 14% by adding 0,5% of aloe vera juice. After that, the formulation evaluated for 4 weeks about the organoleptics, homogenity, pH, drying time and viscosity. The date of pH test and drying time analyzed by using one way ANOVA statistically and then followed by Tukey HSD test and the viscosity analyzed by using Kruskall Wallis statistically which result in the significantcy less than 0,05 that mean there are difference in drying time and viscosity, on the other hand there is no difference in pH.

scholarly journals AN ANALYSIS OF CODE SWITCHING USED BY ENGLISH TEACHER BASED ON GENDER INEQUALITY

2019 ◽  
Vol 2 (1) ◽  
pp. 48-58
Author(s):  
Chotibul Umam ◽  
Dita Sukawati ◽  
Fadilla Oktaviana
Keyword(s):  
Gender Inequality ◽  
Qualitative Method ◽  
Video Recording ◽  
Code Switching ◽  
The Other ◽  
English Teacher ◽  
Other Hand ◽  
Made In

In this research, the writer was aimed to find out the types of code switching that used by English teacher based on gender inequality and the reasons of using code switching that used by English teacher based on gender inequality. The writer was conducted case study in qualitative method. In collecting the data, the writer used observation by using video recording and interview. The result of the research shows that the writer found three types from each teacher based on gender inequality by observation. The types are inter-sentential, intra-sentential and tag switching. In the other hand, each types that used by English teacher based on gender inequality was made in number percentages, for female English teacher are inter sentential code switching 54%, intra sentential code switching 38% and tag switching 8%. Moreover, for male English teacher are inter sentential code switching 42%, intra sentential code switching 41% and tag switching 18%. In the other words, interview was used to find out the reasons that used by English teacher based on gender inequality. The reasons are talking about particular topic, repetition, Interjection and Raising status.

The Sucrose-Natural Gypsum Makes the Compound Retarder to the Cement and the Concretes Performance Influence Experimental Study

2011 ◽  
Vol 335-336 ◽  
pp. 1219-1222
Author(s):  
Ru Qin Wang
Keyword(s):  
Experimental Study ◽  
Physical Properties ◽  
Experimental Research ◽  
Mixing Time ◽  
The Other ◽  
Positive Correlation ◽  
Other Hand ◽  
Cement And Concrete

By the experimental research to the effect sucrose-natural gypsum as composite retarder on the performance of cement and concrete. This paper analyzes and summarizes the fact that the influence of this kind of composite retarder is more obvious than the slow setting effect of a single sugar or plaster. And the retardation of cement and concrete the mixing time is basically the amount of sugar a positive correlation. And on the other hand, it will not influence other physical properties.

Remnants of Virgil, Ovid, and Paul in Titus Andronicus

2019 ◽  
pp. 129-144
Author(s):  
Catherine Winiarski
Keyword(s):  
Cultural Adaptation ◽  
Violent Conflict ◽  
The Other ◽  
Protestant Reformation ◽  
Titus Andronicus ◽  
Model Form ◽  
Other Hand ◽  
Post War ◽  
Made In

Employing Linda Hutcheon’s analogy between biological and cultural adaptation, this chapter analyzes how the survivors of the Roman-Gothic war in Shakespeare’s Titus Andronicus adapt figures and narratives of the survivor—or remnant—from Virgil, Ovid, and St. Paul as strategic models in the covert, post-war feud of the play’s action. Titus assumes Virgil’s model of the remnant as non-regenerative and stoic; Tamora, on the other hand, employs Ovid’s regenerative and vengeful model, and eventually converts Titus to it. Their violent conflict and absorption in their revenge plots form the conditions for the emergence of a different kind of remnant: the remaining Romans and Goths who, according to a Pauline model, form a new incorporated community. The formation of this community arguably speaks to the context of the Protestant Reformation in Shakespeare’s England, in which violent excisions were made in the name of a latter-day Pauline community.

scholarly journals Incidence of base rot and wilt, sanitary severity and influence about seed pathology by cultivars of common bean (Phaseolus vulgaris)

2019 ◽  
Vol 86 ◽  
Author(s):  
Mateus Paulino Braga ◽  
Luana Machado Rezende ◽  
Lucinete Martins Barbosa Estrela ◽  
Natanael Marcos Lemes ◽  
Anderson Rodrigues Rietjens ◽  
...  
Keyword(s):  
Phaseolus Vulgaris ◽  
Common Bean ◽  
Test Method ◽  
The Other ◽  
Other Hand ◽  
Seed Pathology ◽  
Random Samples ◽  
Physiological Quality ◽  
The Impact ◽  
The City

ABSTRACT: The objective of this work was to conduct a temporal evaluation of incidence of rot base and sanitary severity, and to relate the impact on the seed pathology of common bean cultivars. In the 2015-2016 harvest, in the city of Ipameri, Goiás, ten cultivars of common bean were evaluated (BRS Estilo©, BRS Pérola©, IPR Tangará©, IPR Tuiuiú©, IPR Uirapuru©, IAC Milênio©, Imperador©, IAC F3 R2©, IAC OTG© and IPR Campos Gerais©) and distributed into five blocks, totaling 40 experimental units. The incidence of wilt and base rot and sanitary severity were analyzed by taking ten random samples per block at 21, 28, 56, 63 and 69 days after planting. At the end of 120 days, a total of 20 plants were harvested per cultivar, and 250 seeds were harvested for application of the Blotter Test method. From 21 to 69 days after planting, the cultivars BRS Pérola© and IPR Campos Gerais© deserve to be highlighted for presenting the lowest incidence of wilt in the reproductive and vegetative cycles. The cultivar BRS Pérola© showed the lowest incidence of wilt and sanitary severity. In the analysis of harvested seeds, the cultivar BRS Pérola© presented high physiological quality for all evaluated parameters. On the other hand, Cramberry (OTG)© showed low physiological potential in germination and vigor tests.

The Letter of Recommendation as Strange Work

PMLA ◽  
2012 ◽  
Vol 127 (4) ◽  
pp. 954-962
Author(s):  
Margaret Ferguson
Keyword(s):  
The Other ◽  
Free Lunch ◽  
Other Hand ◽  
The Gift ◽  
English Major ◽  
The Common ◽  
The One ◽  
Gift Certificate ◽  
Time And Energy ◽  
Made In

On the one hand, the gift presents itself as a radical Other of the commodity—and therefore also of work, insofar as the latter is understood as an investment of time and energy made in the expectation of wages or profit. On the other hand, the idea of the gift seems constantly to be drawn back under the horizon of rational exchange, and to be thus endlessly re-revealed as a secret ally of both work and the Work.—Scott Cutler Shershow, The Work and the GiftI have put together all these details to convince you that this recommendation of mine is something out of the common.Quae ego omnia collegi, ut intellegeres non vulgarem esse commendationem hanc meam.—Cicero, Epistulae ad familiares, book 13LAST FALL I FOUND IN MY OFFICE MAILBOX AN ENVELOPE FROM A SOPHOMORE ENGLISH MAJOR WHO HAD ASKED ME DURING THE SUMMER for a last-minute letter of recommendation for a scholarship competition. The envelope contained a handwritten thank-you note—and a gift certificate for a local restaurant. I e-mailed the student to thank her and to tell her that I couldn't accept the gift certificate since the letter I had written for her was part of my job as a teacher. She insisted; I insisted. She said that several teachers had turned her down before I agreed (from a hotel in Germany) to write for her. I felt rueful, as well as grateful to her for the token of gratitude that I couldn't accept. Eventually she won the debate: I accepted the printed piece of paper and took my daughters out to a free lunch.

scholarly journals Newton as an experimenter

1943 ◽  
Vol 181 (986) ◽  
pp. 244-250
Keyword(s):  
Experimental Work ◽  
Furnace Operation ◽  
The Other ◽  
Theoretical Studies ◽  
Other Hand ◽  
Made In ◽  
Grinding And Polishing ◽  
At Home

The duty has been assigned to me of telling you something about Newton as an experimentalist. As the result of a study of what is known of his history, it seems to me that among his various intellectual pursuits experiment was his first love and the love to which he was most constant. Strange though it be, he seems in some moods to have doubted whether his theoretical studies were worth while, and I do not recall any case where he expressed himself enthusiastically about them. On the other hand, he speaks of his optical work as ‘The oddest if not the most considerable detection which has hitherto been made in the operation of nature.’ Newton loved the mechanical side of experimental work. As a boy he constructed sundials, and, what is more, fixed one of them into the side of the house effectually enough for it to be there a century later. A notebook of his boyhood shows him assiduous in collecting recipes for various kinds of drawing materials, and he notes methods of performing some (rather nasty) conjuring tricks. Later on, when he is making his reflecting telescope, it is obvious that he is a skilled amateur mechanic, at home in furnace operation. He builds his own brick furnace, prepares speculum metal, and is apparently more successful than the professional opticians of the time in grinding and polishing it to a satisfactory spherical figure. (The days of parabolizing were not yet.) It was not until a good many years later that they were able to put such instruments on the market.

scholarly journals Preparation and Thermal and Anti-UV Properties of Chitosan/Mica Copolymer

2010 ◽  
Vol 2010 ◽  
pp. 1-6 ◽  
Author(s):  
Yih-Sheng Huang ◽  
Sheng-Haur Yu ◽  
Yea-Ru Sheu ◽  
Kuo-Shien Huang
Keyword(s):  
Experimental Data ◽  
Thermal Stability ◽  
Free Radical ◽  
Physical Properties ◽  
Ammonium Persulfate ◽  
Sodium Bisulfite ◽  
The Other ◽  
Other Hand

This experiment aims to produce a free radical while annoying the oxidizing-reducing reagent of the ammonium persulfate and the sodium bisulfite under nitrogen, then trigger copolymerization between modified-mica and chitosan to prepare a variety of copolymers. This experiment also aims to study the related properties of these copolymer materials. The experimental data shows that the copolymer has more thermal stability and better absorption of UV than chitosan. But the above physical properties will be less if the mica ratio in copolymer is more than 8%. On the other hand, the SEM photo of the microstructure also shows that the modified mica distributes homogeneously on the surface of the film of the copolymer.

Foundations of Rivalry Research

2017 ◽  
Author(s):  
David R. Dreyer
Keyword(s):  
The Other ◽  
Measurement Reliability ◽  
Multiple Perspectives ◽  
Conceptual Mapping ◽  
Other Hand ◽  
Ordinal Measure ◽  
Tremendous Progress ◽  
Over Time ◽  
Made In ◽  
Measurement Validity

Rivalry is pervasive in many areas of life. Though rivalry is not isolated to international politics, interstate rivalries are particularly important given their conflict propensities and destructiveness. Tremendous progress has been made in determining the causes of rivalry initiation, maintenance, escalation, and termination. What we know empirically about rivalry, however, hinges on how the concept of rivalry is defined and which dyads are identified as rivals for which periods of time. Though the what, who, and when questions of rivalry may seem straightforward and the answers to such questions in some cases obvious, defining and identifying rivals has not been without scholarly controversy. There are several approaches to conceptualizing and operationalizing rivalry. Each approach has strengths and weaknesses. Dispute density approaches, for example, which identify rivals as states that engage in repeated instances of militarized conflict over time, have higher levels of measurement reliability than validity. The strategic rivalry approach, on the other hand, which identifies rivals as states that view one another as threatening competitors and enemies, has a higher level of measurement validity than reliability. Rather than advocating one approach over another, the intent of this article is to lay bare the strengths and weaknesses of different ways of identifying cases of rivalry. Existing rivalry research provides a foundation from which to further develop rivalry approaches. Given that the concept of rivalry has only recently been applied outside of the dyadic interstate context, additive research is still needed on rivalry in intrastate, triadic and multistate, and other settings. Due to the existence of several mature dyadic interstate rivalry approaches, on the other hand, developing additional distinct approaches for the dyadic interstate context is less imperative than integrating existing approaches. There are several ways this can potentially be done, such as by combining elements of multiple perspectives in ways that minimize weaknesses, through conceptual mapping, or by developing an ordinal measure of rivalry.

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