scholarly journals Comparative studies of two male recombination factors (MRF) isolated from a Southern GreekDrosophila melanogasterpopulation

1981 ◽  
Vol 38 (2) ◽  
pp. 125-135 ◽  
Author(s):  
Nikos Stamatis ◽  
George Yannopoulos ◽  
Michael Pelecanos
Keyword(s):  
Comparative Study ◽  
Natural Population ◽  
High Temperatures ◽  
Comparative Studies ◽  
Female Sterility ◽  
Male Recombination ◽  
Wide Range ◽  
Two Factors ◽  
Large Clusters ◽  
Double Crossovers

SUMMARYA comparative study of two male recombination factors (31. 1 MRF and 23. 5 MRF) isolated from the same Southern Greek natural population, revealed specific differences in their activities. 23. 5 MRF induces female sterility due to atrophie ovaries at a wide range of temperatures while 31. 1 MRF does so only at high temperatures. The gross morphology of the atrophie ovaries was the same and unilaterally affected pairs were found in the F1of crosses with both 23. 5 and 31. 1 MRF. Furthermore, 23. 5 MRF induces: (a) lower frequencies of abnormal anaphases I and II than 31. 1 MRF, (b) higher frequencies of ‘double crossovers’ resulting from deficiences or duplications, (c) large clusters of recombinants, suggesting premeiotic origin and (d) cases where one of the non-recombinant phenotypes was not produced. Such cases have never been observed with 31. 1 MRF. Moreover, the cytoplasm of theCy L4/Pmstrain that suppresses 31. 1 MRF does not affect the activities of 23. 5 MRF. Hypotheses to explain the different behaviour of the two factors are presented and discussed.

Lot's Offer of his Daughters to his People in the Torah and the Qur'an: A Comparative Study in Two Parts (Part One)

2016 ◽  
Vol 18 (3) ◽  
pp. 161-224
Author(s):  
ʿĀʾiḍ B. Sad Al-Dawsarī
Keyword(s):  
Comparative Study ◽  
Comparative Studies ◽  
The Third ◽  
The Past ◽  
The Status ◽  
Moral Problems ◽  
Moral Dimensions ◽  
Similarities And Differences

The story of Lot is one of many shared by the Qur'an and the Torah, and Lot's offer of his two daughters to his people is presented in a similar way in the two books. This article compares the status of Lot in the Qur'an and Torah, and explores the moral dimensions of his character, and what scholars of the two religions make of this story. The significance of the episodes in which Lot offers his daughters to his people lies in the similarities and differences of the accounts given in the two books and the fact that, in both the past and the present, this story has presented moral problems and criticism has been leveled at Lot. Context is crucial in understanding this story, and exploration of the ways in which Lot and his people are presented is also useful in terms of comparative studies of the two scriptures. This article is divided into three sections: the first explores the depiction of Lot in the two texts, the second explores his moral limitations, and the third discusses the interpretations of various exegetes and scholars of the two books. Although there are similarities between the Qur'anic and Talmudic accounts of this episode, it is read differently by scholars from the two religions because of the different contexts of the respective accounts.

Assessing the Ergonomic Benefits of a New Adjustable Forklift Backrest

2020 ◽  
Vol 64 (1) ◽  
pp. 976-980
Author(s):  
Pranav Madhav Kuber ◽  
Ehsan Rashedi
Keyword(s):  
Comparative Study ◽  
Motion Capture ◽  
Center Of Pressure ◽  
Body Movement ◽  
Pressure Change ◽  
Motion Capture System ◽  
Design Features ◽  
Wide Range ◽  
Body Sizes ◽  
The Mean

A new forklift backrest has been developed by incorporating adjustability concepts into the design to facilitate comfort to a wide range of users. We have conducted a comparative study between the new and original backrests to assess the effectiveness of design features. Using the phenomenon of restlessness, discomfort of the user was associated with the amount of body movement, where we have used a motion- capture system and a force platform to quantify the individuals’ movement for a wide range of body sizes. Meanwhile, subjective comfort and design feedback were collected using a questionnaire. Our results showed a reduction in the mean torso movement and the maximum center of pressure change of location by 300 and 6 mm, respectively, for the new design. Taking advantage of adjustability feature, the new backrest design exhibited enhanced comfort for longer durations and reduced magnitude of discomfort for a wide range of participants’ body sizes.

scholarly journals Deformation of Ordered Mesoporous Silica Structures on Exposure to High Temperatures

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
John B. Lowe ◽  
Richard T. Baker
Keyword(s):  
Mesoporous Silica ◽  
Pore Structure ◽  
High Temperatures ◽  
Elevated Temperatures ◽  
Ordered Mesoporous Silica ◽  
Large Cage ◽  
Pore Structures ◽  
Ordered Mesoporous ◽  
Pore Size Distributions ◽  
Wide Range

Ordered mesoporous silica materials are of interest for a wide range of applications. In many of these, elevated temperatures are used either in the preparation of the material or during its use. Therefore, an understanding of the effect of high temperature treatments on these materials is desirable. In this work, a detailed structural study is performed on silicas with three representative pore structures: a 2-D hexagonal pore arrangement (SBA-15), a continuous 3D cubic bimodal pore structure (KIT-6), and a 3D large cage pore structure (FDU-12). Each silica is studied as prepared and after treatment at a series of temperatures between 300 and 900°C. Pore structures are imaged using Transmission Electron Microscopy. This technique is used in conjunction with Small-Angle X-ray Diffraction, gas physisorption, and29Si solid state Nuclear Magnetic Resonance. Using these techniques, the pore size distributions, the unit cell dimensions of the mesoporous structures, and the relative occupancy of the distinct chemical environments of Si within them are cross correlated for the three silicas and their evolution with treatment temperature is elucidated. The physical and chemical properties before, during, and after collapse of these structures at high temperatures are described as are the differences in behavior between the three silica structures.

Le fonti, i metodi e le narrazioni della storia della videoarte in Italia negli anni Settanta

2017 ◽  
Vol 2 (1) ◽  
Author(s):  
Lisa Parola
Keyword(s):  
Comparative Study ◽  
Contemporary Art ◽  
Narrative Structure ◽  
Video Art ◽  
Wide Range ◽  
History Of ◽  
Selection For ◽  
The Many ◽  
Art And Architecture ◽  
Selection Of

This essay derives from the primary need to make order between direct and indirect sources available for the reconstruction of the history of video art in Italy in the seventies. In fact, during the researches for the Ph.D. thesis it became clear that in most cases it is difficult to define, in terms of facts, which of the different historiographies should be taken into consideration to deepen the study of video art in Italy. Beyond legitimate differences of perspectives and methods, historiographical narratives all share similar issues and narrative structure. The first intention of the essay is, therefore, to compare the different historiographic narratives on Italian video art of the seventies, verifying their genealogy, the sources used and the accuracy of the narrated facts. For the selection of the corpus, it was decided to analyze in particular monographic volumes dealing with the history of the origins of video art in Italy. The aim was, in fact, to get a wide range of types of "narrations", as in the case of contemporary art and architecture magazines, which are examined in the second part of the essay. After the selection, for an analytical and comparative study of the various historiography, the essay focuses only on the Terza Biennale Internazionale della Giovane Pittura. Gennaio ’70. Comportamenti, oggetti e mediazioni (Third International Biennial of Young Painting. January '70. Behaviors, Objects and Mediations, 1970, Bologna), the exhibition which - after Lucio Fontana's pioneering experiments - is said to be the first sign of the arrival of videotape in Italy (called at the time videorecording), curated by Renato Barilli, Tommaso Trini, Andrea Emiliani and Maurizio Calvesi. The narration given so far of this exhibition appeared more mythological than historical and could be compared structurally to that of the many numerous beginnings that historiographyies on international video art identify as ‘first’ and ‘generative’. In the first part of the essay the 'facts' related to Gennaio ’70, as narrated by historiography on video art, are compared. In the second part the survey is carried out through some of the direct sources identified during the research, with the aim of answering to questions raised by the comparison between historiographies. Concluding, it is important to underline that the tapes containing the videos transmitted have not been found and seem to have disappeared since the ending of the exhibition. Nevertheless, the deepening of the works and documentation transmitted during the exhibition is possible thanks to other types of sources which give us many valuable information regarding video techniques and practices at the beginning of 1970 in Italy.

scholarly journals Verstedeliking: Vergelyking tussen Suid-Afrikaanse letterkundes en die kultuurteks

2018 ◽  
Vol 50 (3) ◽  
pp. 39-59
Author(s):  
Jacomien Van Niekerk
Keyword(s):  
Comparative Study ◽  
South African ◽  
Southern Africa ◽  
Comparative Studies ◽  
Black People ◽  
Literary Historiography ◽  
Literary Histories

Despite many efforts to publish comprehensive literary histories of South or Southern Africa in recent years, few studies existin which a thorough comparative study is undertaken between two or more South African literatures. This article wants to provide a practical example of such a study by comparing the urbanisation of Afrikaners in Afrikaans literature with that of black people as seen in English and Zulu literature. The statement made by Ampie Coetzee that comparative studies should take place within the framework of discursive formations is one of the fundamental starting points of this study. Maaike Meijer’s concept of the “cultural text” is further employed as a theoretical instrument. The identification of repeating sets of representation is central to the demarcation of a “cultural text about urbanisation” in Afrikaans, English and Zulu literature respectively. The cultural text forms the basis from which a valid comparative study can be embarked upon, and the results of the research have important implications for further comparative studies but also literary historiography.

scholarly journals Default and Termination of Contract: A comparative Study between Indonesia and The United Kingdom

Yuridika ◽  
2020 ◽  
Vol 35 (3) ◽  
pp. 469
Author(s):  
Akhmad Budi Cahyono
Keyword(s):  
United Kingdom ◽  
Comparative Study ◽  
Comparative Studies ◽  
Common Law ◽  
Contract Law ◽  
Legal Rules ◽  
Contractual Relationship ◽  
The United Kingdom ◽  
Injured Party ◽  
The Right

Default is something that often occurs in contractual relationship. It can be not perform its obligations in the contract in all or in a part, performing its obligations but not in accordance with was agreed, performing its obligations but not in time, and performing something that is prohibited in the contract. Due to default, the injured party may claim compensation and / or terminate the contract. The problem is, the Indonesian Civil Code does not specify how a contract can be terminated in case of default. Therefore, it is necessary to conduct a comparative study in other countries in terms of how a default can terminate the contract. The British which adopt common law tradition where jurisprudence is the main source of law is the right choice for conducting comparative studies. Countries with common law traditions have detailed legal rules based on jurisprudence. As in Indonesia, according to British contract law, defaults also can terminate the contract. However, unlike in Indonesia, according to British contract law, termination due to a default is only allowed in the event that the default is very serious. The very serious forms of default will be elaborated and become a part of the discussion in this paper.

scholarly journals The matter of comparative studies of the national version of the poems: “Garip Ashiq Shakhsanem” (on The Examples Of Karakalpak, Uzbek And Turkmen Languages)

2020 ◽  
Vol 5 ◽  
pp. 11-12
Author(s):  
Allambergenov Kenesbay
Keyword(s):  
Comparative Study ◽  
Comparative Studies

This article is about the epic of a stranger and a lover in love and a comparative study of its national versions. Moreover, the matter of comparative studies of the national version of the poems. On this case “Garip Ashiq Shakhsanem” (on the examples of Karakalpak, Uzbek and Turkmen languages) has been analyzed and investigated both methodological and theoretically.

scholarly journals The Fully Conscious Ape

2018 ◽  
Vol 31 ◽  
Author(s):  
Sue Savage-Rumbaugh ◽  
Itai Roffman ◽  
Sabatien Lingomo ◽  
Elizabeth Pugh
Keyword(s):  
Comparative Studies ◽  
Cognitive Skills ◽  
Nonhuman Primates ◽  
The Self ◽  
The Other ◽  
Human Language ◽  
Wide Range ◽  
Transfer Index ◽  
Modern Era ◽  
Current Experience

Duane Rumbaugh was one of the first primatologists of the modern era (which began after WWII), to engage in comparative studies of the cognitive capacities of nonhuman primates. In fact, it was Rumbaugh who drew the world's attention to the Order Primates and who helped initiate the International Primatological Society, IPS, the first academic society to be organized around an Order rather than a discipline. His work eventually led in two directions, first the development of the Transfer Index, a was completely new way of looking at learning. The TI seperated monkeys from apes as completely as did Gallup's mirror task. From this arose the Primate Test Battery, a video based system to test cognitive skills across a wide range of tasks from memory to numerical skils in primates. The other direction was to look at language and its effect on cognition. Only Apes succeeded in the laguage tasks. With Lana's success arose a raft of critiques that - in the light of more recent findings about the structure of human language, are now rendered invalid. Rumbaugh's initial findings in all domains has remained sound. This includes fundamental differences between monkeys and apes in their capacity to spontaneously begin control their attention, to consciously monitor their own behavior, and then to alter it deliberately, or by their own choice. It is the ape's conscious capacity to control its attention and to conciously monitor outcomes in a cause/effect manner, that allows for the acquisition of langauge. This also allows for the creation of "personal self", as a being that exists apart from the current experience of the self. Language greatly assists the emergence of this ability in apes, as does early rearing in which the ape is carried but not seperated from its mother. This allows pointing and joint reference to appear far ahead of schedule and for the spontaneouls development of human language in cross-species co-reared apes. The presence of a wild-reared mother (not present in other captive environments)also allows for the emergence of a nonhuman form of vocal language. The implications of this work for future investigations of apes are discussed.

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