The Spermatophores of Dolops ranarum (Crustacea, Branchiura): their Structure, Formation, and Transfer

1960 ◽  
Vol s3-101 (56) ◽  
pp. 407-432
Author(s):  
GEOFFREY FRYER
Keyword(s):  
Structure Formation ◽  
Sperm Transfer ◽  
The Other ◽  
Wall Material ◽  
Other Hand ◽  
Close Relationship ◽  
The Common ◽  
Relationship Of

Sperm transfer in the genus Dolops involves the employment of spermatophores. In this respect the genus is unique within the Branchiura. Proteinaceous wall material is secreted by arborescent spermatophore glands located in the carapace lobes of the male and is passed into a pair of long canals which terminate posteriorly as a pair of spermatophoric vesicles, part of whose walls are glandular. Spermatozoa from the vasa deferentia are injected into these vesicles and become surrounded by wall material. During the mating process the contents of each vesicle are squeezed out through the common genital orifice, where they become confluent and form a single, globular spermatophore. While its walls are still soft this is pressed against the base of the abdomen of the female, where it is pierced by two perforated spines at the end of the spermathecal ducts. The spermatophore hardens and remains attached to the female, thus giving the spermatozoa opportunity to migrate through the spermathecal ducts to the spermathecae. Not until after a moult of the female, however, during which the spermatophore is shed with the old cuticle, are the spermatozoa free to enter the eggs, each of which is believed to be pricked bythe spermathecal spines during oviposition. By virtue of the fact that it involves quite different organs and processes in the two groups, spermatophore formation indicates that the Branchiura and Copepoda are not closely related. On the other hand, the process is in no way suggestive of a close relationship of the Branchiura and Branchiopoda, and the isolated position of the Branchiura is emphasized.

On gestural mimicry

Gesture ◽  
2006 ◽  
Vol 6 (1) ◽  
pp. 39-61 ◽  
Author(s):  
Irene Kimbara
Keyword(s):  
Detailed Analysis ◽  
Speech Production ◽  
Single Unit ◽  
Common Ground ◽  
The Other ◽  
Other Hand ◽  
The Common ◽  
Relationship Of ◽  
Exact Origin ◽  
Internal Coupling

Despite various theories about the exact origin of gestures in speech production, researchers generally accept that gesture and speech constitute the product of a single unit of thought within the speaker. On the other hand, what I call gestural mimicry requires consideration of factors outside such speaker-internal coupling of gesture and speech. Through detailed analysis of a joint narration task and casual conversation in a dyad, I will show that, once perceived and decoded by a partner, the form–meaning relationship of a speaker’s gesture can become part of the common ground of understanding between the participants. In gestural mimicry, communicativity is observed in the way a speaker’s spontaneous gesture shapes the subsequent gestural move of the interlocutor. With a recurrence of gestural features across speakers, image construal through gesture becomes an interactional phenomenon. That is, gesture as well as speech provides an interactional resource for co-constructing talk.

NOTES ON THE ORGANS AND PROCESSES OF SPERM-TRANSFER IN THE LOWER DIPTERA

1968 ◽  
Vol 100 (6) ◽  
pp. 608-617 ◽  
Author(s):  
J. A. Downes
Keyword(s):  
Closed System ◽  
Common Duct ◽  
Sperm Transfer ◽  
The Other ◽  
Simple Condition ◽  
Close Apposition ◽  
Muscular Coat ◽  
Other Hand ◽  
Single Opening ◽  
The Common

AbstractIn Tanyderidae, Blepharoceridae, and Cylindrotominae, the aedeagus of the male carries three seminal ducts which open independently. In the female, similarly, there are three spermathecae and their ducts lead to independent openings on the ninth sternum, spaced to correspond to those of the male. The aedeagal ducts are very narrow and arise from an ejaculatory pump supplied by the common duct of the testes; and during mating the aedeagal openings are closely applied to the spermathecal openings or inserted into the spermathecal ducts. The ejaculatory pump and closed system during mating occur in many, but not all, Nematocera and perhaps throughout the Brachycera, but the tripartite condition of the organs of sperm transfer is reduced to a bipartite condition in Phlebotominae and to a ’simple’ condition, with only a single opening of the aedeagus and spermathecal system, in nearly all other Diptera. The spermathecae themselves, however, remain three in number almost throughout the order, though their ducts unite before opening; and this pattern must have been derived from the tripartite pattern of the Tanyderidae, etc., which represents the basic condition in the order.In the Culiciformia (Culicidae, Chironomidae, Simuliidae, etc.) on the other hand, there is no ejaculatory pump but its place is taken by a wide duct lined with folded cuticle and covered by a muscular coat. The aedeagus is not suited for close apposition to the spermathecal opening. During mating a larger quantity of sperm-containing material is deposited in the surrounding atrium, as a liquid (Culicidae) or often as a spermatophore. Sperm transfer can be completed rapidly, as the pair meet in flight in the swarm. One primitive family, the Dixidae, constitutes an exception to these generalizations.The Bibionomorpha, except for Anisopus, were not studied.A brief comment is made on the characteristic small size of the dipterous spermatheca and the fineness of the spermathecal ducts.

Orientation Relationship Between the bcc and σ Phases in Cr-Co Alloys

2006 ◽  
Vol 980 ◽  
Author(s):  
Toshihiro Doi ◽  
Makoto Tanimura ◽  
Yasumasa Koyama
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Structure Formation ◽  
Orientation Relationship ◽  
The Other ◽  
Annealing Temperatures ◽  
Other Hand ◽  
Transmission Electron ◽  
The Common ◽  
Co Alloys

AbstractTo obtain deeper understanding of the Ð structure, the formation of the Ð structure in the (bcc¨bcc+Ð) reaction at 873K and 1173K have been investigated by transmission electron microscopy. As for the orientation relationship between the bcc and Ð structures, as a results, both the common first relation of [110]bcc//[110]Ð and three second relations given by α=0°, 33°, and 64° were found in the 1173K annealing, where α is an angle between the [_110]bcc and [001]Ð directions. In the 873K annealing, on the other hand, there was only one second relation with α=0°. Based on the α=0° relation found in both annealing temperatures, the features of atomic shifts in the Ð-structure formation were also discussed.

Albrecht Durer and the 16TH Century Melancholy

2020 ◽  
Vol 2 ◽  
pp. 37-49
Author(s):  
Marcel Henrique Rodrigues
Keyword(s):  
Religious Culture ◽  
The Other ◽  
16Th Century ◽  
Other Hand ◽  
Close Relationship ◽  
The One ◽  
Deep Sense

Little has been discussed in academia about the close relationship between the Renaissance of the 16th century and melancholy humor, and esoteric elements arising mainly from Florentine Neoplatonism. The link between melancholy and esotericism becomes very clear when we analyze the gravure “Melencolia I” by Albrecht Dürer (1471-1528), composed of a significant number of symbols that refer to an esoteric religious culture that then emerged. Renaissance melancholy gained several nuances. On the one hand, it was considered a sin, a despicable mood characteristic of witches; on the other hand, a deep sense of inspiration typical of men of “genius”. This ambivalence also occurred in the firmament, as the melancholic people were guided by the dark planet Saturn, according to astrological belief. We also have the cultural scenario of the 16th century, especially in Dürer's Germany, which contributed to strengthening the melancholy issues.

The Rubicon of Language

2018 ◽  
Author(s):  
Sebastian Lecourt
Keyword(s):  
The Other ◽  
Racial Identities ◽  
Other Hand ◽  
Max Müller ◽  
The Common ◽  
Human Capacity ◽  
The One ◽  
Religious Differences

This chapter considers a series of formative debates in British anthropology from the 1840s through the 1860s and uses them to map out the two dominant constructions of religion whose politics the subsequent authors in this study would reinvent. It describes, on the one hand, a liberal and evangelical construction of religion as the common human capacity for spiritual cultivation, and on the other hand a conservative, reactionary model that interpreted religious differences as the expressions of fixed racial identities that neither civilization nor Christianization could erase. In the work of the Oxford philologist F. Max Müller we see how the former model tended to associate religion above all with language. But we can also see the subtle forms of determinism that it contained—an ambiguity that Arnold, Pater, Eliot, and Lang would explore by picturing racialized religion as a resource for liberal self-cultivation.

Common Lawà l'americaine

1966 ◽  
Vol 1 (4) ◽  
pp. 562-579 ◽  
Author(s):  
A. M. Apelbom
Keyword(s):  
Common Law ◽  
The Other ◽  
British Occupation ◽  
Other Hand ◽  
Two Generations ◽  
The Common ◽  
English Law ◽  
Considerable Body ◽  
Clear Line

Eighteen years after attaining independence Israel remains essentially a common law country. Introduced by the British Mandatory administration to supplement the Ottoman legislation in force at the time of the British occupation of Palestine, the common law has been retained by the Israeli legislator, so far as not modified or replaced by local legislation. But this common law, far from being residual only, also embraces a considerable body of interstitial law developed by two generations of judges, British, Palestinian and Israeli, in the process of applying and interpreting statute law—whether Ottoman, Mandatory or Israeli—according to common law methods. On the other hand the importation of common law institutions was neither wholesale nor systematic and in a number of fields no clear line of demarcation can be drawn between domestic and English law.

Epodes

1972 ◽  
Vol 6 ◽  
pp. 6-14
Keyword(s):  
Social Status ◽  
Lyric Poetry ◽  
The Other ◽  
Similar Attitude ◽  
Other Hand ◽  
Close Relationship

Horace was writing hisEpodes1at the same time as he was writingSatires. The nameEpodesis derived from the metrical term ό ἐπῳδός (і.е. στίχος) which signifies the second and shorter line of a couplet, but Horace himself referred to them asiambi(soEpod. 14. 7,Epist. i. 19. 23). The collection is titledLiber Epodonin the MSS. and the title was used by grammarians of the fourth and fifth centuries. Butiambigives a better idea of their basic inspiration. Horace says of them(Epist. i. 19. 21-5):So he claims(a)originality,(b)Archilochus as a model,(c)that he was the first Roman to use Archilochus as a model, and(d)that he discarded the vicious personal invective of Archilochus. The judgement disregards Catullus, who had writteniambibefore Horace, but whose similarity to Archilochus did not extend far beyond metre and invective. There is a consistency in Horace’s poetic career: he began by recreating the poetry of Archilochus in hisEpodes, and his later—and greatest— work was the recreation in hisOdesof the lyric poetry of poets like Sappho, Alcaeus, and Pindar. There is a similarly close relationship between theSatiresand theEpistles;and, furthermore, all of his writing uses an autobiographical technique. There is another sort of consistency too, for basicallyEpodesandSatiresexpress a similar attitude of mind: anger, contempt, and amusement are the fundamental emotions (though he often transcends these emotions in both works), and a plausible case can be made out for regarding this as a sign of a young man of low social status, unsure of himself and his talent, and already finding ways of expressing a personality that were not too self-revealing. TheOdesandEpistles, on the other hand, express a more meditative, more philosophical, more humane attitude, yet ultimately no more self-revealing.

scholarly journals On Newcomb's method of investigating periodicities and its application to Brückner's weather cycle

1914 ◽  
Vol 90 (619) ◽  
pp. 349-355
Keyword(s):  
Thermal Radiation ◽  
The Other ◽  
New Method ◽  
Critical Examination ◽  
Numerical Work ◽  
Average Value ◽  
Other Hand ◽  
Relationship Of ◽  
The Relationship ◽  
Great Simplicity

During the last few years of his life Prof. Simon Newcomb was keenly interested in the problem of periodicities, and devised a new method for their investigation. This method is explained, and to some extent applied, in a paper entitled "A Search for Fluctuations in the Sun's Thermal Radiation through their Influence on Terrestrial Temperature." The importance of the question justifies a critical examination of the relationship of the older methods to that of Newcomb, and though I do not agree with his contention that his process gives us more than can be obtained from Fourier's analysis, it has the advantage of great simplicity in its numerical work, and should prove useful in a certain, though I am afraid, very limited field. Let f ( t ) represent a function of a variable which we may take to be the time, and let the average value of the function be zero. Newcomb examines the sum of the series f ( t 1 ) f ( t 1 + τ) + f ( t 2 ) f ( t 2 + τ) + f ( t 3 ) f ( t 3 + τ) + ..., where t 1 , t 2 , etc., are definite values of the variable which are taken to lie at equal distances from each other. If the function be periodic so as to repeat itself after an interval τ, the products are all squares and each term is positive. If, on the other hand, the periodic time be 2τ, each product will be negative and the sum itself therefore negative. It is easy to see that if τ be varied continuously the sum of the series passes through maxima and minima, and the maxima will indicated the periodic time, or any of its multiples.

Resolving the Lourinia armata (Claus, 1866) complex with remarks on the monophyletic status of Louriniidae, Monard 1927 (Copepoda: Harpacticoida)

Zootaxa ◽  
2021 ◽  
Vol 5051 (1) ◽  
pp. 346-386
Author(s):  
SÜPHAN KARAYTUĞ ◽  
SERDAR SAK ◽  
ALP ALPER ◽  
SERDAR SÖNMEZ
Keyword(s):  
Comparative Evaluation ◽  
Species Complex ◽  
Detailed Examination ◽  
The Other ◽  
Phylogenetic Position ◽  
Nicobar Island ◽  
Other Hand ◽  
The Family ◽  
Close Relationship ◽  
Almost All

An attempt was made to test if Lourinia armata (Claus, 1866)—as it is currently diagnosed—represents a species complex. Detailed examination and comparisons of several specimens collected from different localities suggest that L. armata indeed represents a complex of four closely related morphospecies that can be differentiated from one another by only detailed observations. One of the four species is identified as Lourinia aff. armata and the other three species are described as new to science and named as Lourinia wellsi sp. nov., L. gocmeni sp. nov., and L. aldabraensis sp. nov. Detailed review of previous species records indicates that the genus Lourinia Wilson, 1924 is distributed worldwide. Ceyloniella nicobarica Sewell, 1940, originally described from Nicobar Island and previously considered a junior subjective synonym of L. armata is reinstated as Lourinia nicobarica (Sewell, 1940) comb. nov. on the basis of the unique paddle-shaped caudal ramus seta V. It is postulated that almost all of these records are unreliable in terms of representing true Lourinia aff. armata described herein. On the other hand, the comparative evaluation of the illustrations and descriptions in the published literature indicates the presence of several new species waiting to be discovered in the genus Lourinia.                 It has been determined that, according to updated modern keys, the recent inclusion of the monotypic genus Archeolourinia Corgosinho & Schizas, 2013 in the Louriniidae is not justified since Archeolourinia shermani Corgosinho & Schizas, 2013 does not belong to this family but should be assigned to the Canthocamptidae. On the other hand, it has been argued that the exact phylogenetic position of the Louriniidae still remains problematic since none of the diagnostic characters supports the monophyly of the family within the Oligoarthra. It has also been argued that the close relationship between Louriniidae and Canthocamptidae is supported since both families share the homologous sexual dimorphism (apophysis) on P3 endopod. The most important characteristic that can possibly be used to define Louriniidae is the reduction of maxilliped.  

scholarly journals Terorisme dan Simalakama Media Massa

2020 ◽  
Vol 1 (2) ◽  
pp. 107-123
Author(s):  
Farid Pribadi
Keyword(s):  
Mass Media ◽  
Visual Image ◽  
Qualitative Approach ◽  
The Other ◽  
Symbolic Violence ◽  
Symbiotic Relationship ◽  
Combination Technique ◽  
Other Hand ◽  
Terrorist Acts ◽  
Relationship Of

This article discusses the symbiotic relationship of mutualism between mass media andterrorism. Whether we realize it or not, acts of terrorism in the homeland are still interestingand economically valuable news material in front of the mass media. On the other hand, onthe part of terrorists, the news about terrorist acts actually becomes a strategic campaignarea to show their existence. The research uses a qualitative approach to narrative analysismethod. The results of the study are www.okezone.com and www.tribunnews.com placingthe terror terror events in Medan Mapolrestabes as interesting and economically valuablenews material. The style of the news flow is arranged with a choice of tense, dramatic andsensational nuances of words. In addition, the display of photo and video illustrationsshortly after the explosion also aims to display as if the news of the explosion event is true,not engineering, objective and valid. The combination technique of choice of words, storyline, placement techniques and the size of photos and videos all aim to make the emotions ofthe reader participate dissolved in a tense situation as the situation at the scene of theexplosion. The practice of compiling this kind of news flow is called, as Jean Baudrillard'spractice of simulation. The practice of simulation through the practice of compiling newslines and the touch of visual image technology will eventually create conditions ofhyperreality. Namely the conditions between reality will be mixed with the pseudo so it isdifficult to distinguish which is original and fake. Next, the airing of a list of victims ofunknown origin will actually give birth, as Pierre Bourdie calls it symbolic violence. That is,the practice of violent symbols aimed no longer at the physical target but rather consciousthoughts. Symbolic violence in the appearance of the victim list really has the potential tocreate traumatic feelings towards the families of the victims.

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