Ontogeny and heterochrony in the ostracode Cavellina Coryell from Lower Permian rocks in Kansas

Paleobiology ◽  
1986 ◽  
Vol 12 (3) ◽  
pp. 290-301 ◽  
Author(s):  
Peter N. Schweitzer ◽  
Roger L. Kaesler ◽  
G. P. Lohmann
Keyword(s):  
Life Histories ◽  
Morphological Difference ◽  
Structural Difference ◽  
Lower Permian ◽  
Closely Related Species ◽  
Know How ◽  
Taxonomic Level ◽  
Yield Information ◽  
Structural Differences ◽  
The Difference

Animals evolve by changing their form and by changing the rate at which they develop. Since evolution of development through time may be directly related to the adaptation of their life histories, study of ontogeny in fossils may yield information about the ecology of extinct animals. We need to know how to measure animals' ontogeny and at what taxonomic level structural differences overshadow differences in development. Two closely related species of the Permian ostracode Cavellina were compared to determine how much of the morphological difference between them is due to differences in their ontogenies. Most of the difference is not related to ontogeny. They also differ in a way that could be explained by heterochrony, although this difference is secondary in importance to the structural difference. These findings suggest that ecological adaptation might best be studied by examining the changes in development that occur within species through time and space.

DISTINGUISHING THE INDISTINGUISHABLE OF THE WORDS INJURED, WOUNDED, AND HURT: A CORPUS INVESTIGATION

2017 ◽  
Vol 24 (1) ◽  
pp. 19
Author(s):  
Kusumawardani Dewa Ayu Novi
Keyword(s):  
English Word ◽  
Know How ◽  
Efl Students ◽  
The Difference

Most people, especially EFL students, claimed that English has rich vocabularies. Each vocabulary has many synonyms that could be found in thesaurus. But the problem is, those synonymous words can hardly be differentiated when applied in daily communication. It is because each of the English word has its own context and rule when it is used in a sentence or an utterance. However, in reality, this rule is often ignored by people. It is because they rely more on their intuition. Yet, it needs more than intuition to know the difference and how to use the words properly. The words ‘injured’, ‘wounded’, and ‘hurt’ were chosen as the object of this study, since those words are synonymous and distinguishable. A quick survey had been done by the researcher to know how EFL students and people in general used these three words. It turned out that they used those three words by ignoring the rule and depending on their intuition instead. The aim of this research is to help people to know the difference among those three words. By retrieving data from COCA and finding the collocation of those words, it is hoped that the reader will realize that these synonymous words are not as synonymous as they thought.

scholarly journals Morphological consistency of bilateral hip joints in adults based on the X-ray and CT data

2021 ◽  
Author(s):  
Ran Zhao ◽  
Hong Cai ◽  
Hua Tian ◽  
Ke Zhang
Keyword(s):  
Hip Joint ◽  
Morphological Difference ◽  
Medullary Cavity ◽  
Size Difference ◽  
Single Plane ◽  
X Ray ◽  
Stem Size ◽  
The Difference ◽  
Ct Data ◽  
Anatomical Parameters

Abstract Purpose The application of the anatomical parameters of the contralateral hip joint to guide the preoperative template of the affected side relies on the bilateral hip symmetry. We investigated the bilateral hip symmetry and range of anatomical variations by measurement and comparison of bilateral hip anatomical parameters. Methods This study included 224 patients (448 hips) who were diagnosed with osteoarthritis (OA) and avascular necrosis (AVN) of the femur head, and underwent bilateral primary total hip arthroplasty (THA) in our hospital from January 2012 to August 2020. Imaging data included 224 patients X-ray and 30 CT data at the end of the cohort. Anatomical parameters, including the acetabular abduction angle and trochanteric height, were measured using the Noble method. Postoperative measurements included stem size, difference of leg length and offset. Results Except for the isthmus width, there were no significant differences in the anatomical morphology of the hip joint. Among the demographic factors, there was a correlation between body weight and NSA. Among various anatomical parameters, a correlation was present between medullary cavity widths of T + 20, T, and T − 20. The difference in the use of stem size is not due to the morphological difference of bilateral medullary cavity, but due to the different of 1- or 2-stage surgery. Conclusion Bilateral symmetry was present among the patients with normal morphology of the hip medullary cavity, theoretically confirming the feasibility of structural reconstruction of the hip joint using the hip joint on the uninjured side. Additionally, the difference in the morphology of the hip medullary cavity is not present in a single plane but is synergistically affected by multiple adjacent planes.

scholarly journals Entanglement and the Modern Australian Rhythm Method: Lantana’s Lessons in Policing Sexuality and Gender

2004 ◽  
Vol 1 (1) ◽  
Author(s):  
Kirsty Duncanson ◽  
Catriona Elder ◽  
Murray Pratt
Keyword(s):  
Dance Teacher ◽  
Know How ◽  
Good People ◽  
Cultural Medium ◽  
Sexuality And Gender ◽  
Australian Community ◽  
The Difference ◽  
And Gender ◽  
Protection And Control ◽  
And Control

Film in Australia, as with many other nations, is often seen as an important cultural medium where national stories about belonging and identity can be (re)produced in pleasurable and, at times, complicated ways. One such film is Ray Lawrence’s Lantana. Although striking a chord in Australia as a good film about ‘ basically good people’, people that rang ‘brilliantly’ true (Lantana DVD 2002), this paper argues that, at the same time as it produces a fantasy of a ‘good’ Australia, the film also conducts a regulation of what constitutes Australianness. In many ways the imaginary of Australia offered in this film, to its contemporary, urban, professional and intellectual elite audience, still draws on and (re)produces a vision of an Australian community that uses the same narrative frameworks of protection and control as the cruder discourses of ‘white Australia’ offered to an earlier generation of cinema-goers. This film’s central motif of the lantana bush, the out of control weed, that is known as both foreign and local is here emblematic of tensions about belonging, place and otherness. Yet while, within the film’s knowingly reflexive purview any remaining potential for racism is understood and itself under control – we know how to be good mutliculturalists –it is the trope of sexuality in Lantana that provides the real sense of edginess and anxiety about belonging. It is in this arena that the film sets up an idea of danger and –less self-consciously, and in the end more aggressively – marks out who is and who is not part of the community. In this context the motif of lantana signals an ambivalence about difference and the exotic. Lantana is both desirable because of the difference in its attractive Latin looks and repulsive or feared because of other qualities inherent within its difference: a refusal to behave and a propensity to get out-of control, spread and potentially take over. The film here explores desire for a taste of the other (a gay man, a newly separated woman, a Latin dance teacher). However, these fantasies are in the end emphatically shut down as the film ends by producing a vision of subtly normalised hetero, mono, familial (though not necessarily happy) forms of desiring, loving and reproducing in contemporary Australia.

A comparative study of the life histories of Nematodirus battus and N. filicollis, nematode parasites of sheep

Parasitology ◽  
1959 ◽  
Vol 49 (3-4) ◽  
pp. 374-386 ◽  
Author(s):  
R. J. Thomas
Keyword(s):  
Life History ◽  
Intestinal Mucosa ◽  
Related Species ◽  
Life Histories ◽  
Basic Pattern ◽  
Culture Methods ◽  
Closely Related Species ◽  
Nematode Parasites ◽  
History Of ◽  
Comparative Description

1. The life history of N. battus is described, and a comparative description of the life history of N. filicollis is given.2. The life histories of these two species are compared with those of N. spathiger and N. helvetianus, two closely related species, and are shown to follow the same basic pattern, with minor variations in timing which appear to be specific in nature, and not related to differences in culture methods or host species.3. The pathogenesis of Nematodirus species is discussed and related to the migration of larvae into the intestinal mucosa during development.

scholarly journals Community structure, life histories and secondary production of stoneflies in two small mountain streams with different degree of forest cover

2015 ◽  
Author(s):  
Pavel Beracko ◽  
Andrea Kušnírová ◽  
Michaela Partlová ◽  
Jana Ciceková
Keyword(s):  
Community Structure ◽  
Secondary Production ◽  
Life Histories ◽  
Forest Cover ◽  
Adult Emergence ◽  
Life Cycles ◽  
Mountain Streams ◽  
Annual Life Cycle ◽  
Forested Stream ◽  
The Difference

<p>Our study examines community structure and nymphal biology (life cycles and secondary production) of stoneflies in two adjacent mountain streams with different degree of forest cover in the Prosiečanka River Basin (Chočské Vrchy Mts., West Carpathians). One of the streams has non-forested catchment, converted to meadows and pastures, while the other one has catchment with 60% covered by spruce forest. Differences in forest cover and in thermal regime of the streams were reflected by the difference of stonefly communities at their structural and functional level. Species <em>Nemoura cinerea and Leuctra aurita </em>created stonefly assemblage in non-forested stream, whereas <em>Nemoura cinerea</em> also occurred in naturally forested stream together with species <em>Leuctra armata, Leuctra nigra, Leuctra prima, Siphonoperla neglecta</em> and <em>Arcynopteryx dichroa</em>. All examined species had maximally annual life cycle and in eudominant species <em>Nemoura cinerea</em> one month shift was found in nymphal hatching and adult emergence between streams. Total secondary production of stoneflies in undisturbed stream (126.46 mg DW m<sup>-2</sup> y<sup>-1</sup>) was more than two times higher than the production in non-forested stream (47.39 mg DW m<sup>-2</sup> y<sup>-1</sup>). </p>

scholarly journals Comparison of the fall rate and structure of recent T-7 XBT manufactured by Sippican and TSK

2010 ◽  
Vol 7 (5) ◽  
pp. 1811-1847 ◽  
Author(s):  
S. Kizu ◽  
C. Sukigara ◽  
K. Hanawa
Keyword(s):  
Quadratic Form ◽  
Water Entry ◽  
Rate Coefficients ◽  
Fall Rate ◽  
Current Standard ◽  
Expendable Bathythermograph ◽  
Structural Differences ◽  
Fall Rates ◽  
The Difference ◽  
Temperature Depth

Abstract. The fall rate of recent T-7 expendable bathythermograph (XBT) is evaluated based on a series of concurrent measurement with a calibrated Conductivity Temperature Depth profiler (CTD) in the sea east of Japan. An emphasis is placed on comparing the fall rates of T-7 produced by the two present manufacturers, the Lockheed Martin Sippican Inc., and the Tsurumi Seiki Co. Ltd., which have been believed to be identical but had never been compared directly. It is found that the two manufacturers' T-7 fall at rates different by about 3.5%. The Sippican T-7 falls slower than the current standard equation by Hanawa et al. (1995) gives by about 2.1%, and the TSK T-7 falls faster than it tells by about 1.4%. The fall-rate coefficients estimated based on the present sea test by applying the equation of traditional quadratic form, d(t)=at−bt2 where d is depth in meters and t is the time elapsed, since the water entry of the probe, in seconds, are a=6.553 and b=0.00221 for the LMS T-7, and a=6.803 and b=0.00242 for the TSK T-7. By detail examination of the probes, it is revealed that the two companies' T-7 have different total weight and many structural differences. Because the difference in the fall rate is about twice larger than the difference in weight (about 2%), it is inferred that those structural differences give sizable impact to the difference in their fall rates. Our results clearly show that the recent T-7 of the two companies needs to be discriminated.

scholarly journals Comparative anatomical and histological research of the roots of Rheum Palmatum L. And Rheum Officinale B.

2020 ◽  
Vol 19 (5-6) ◽  
pp. 155-159
Author(s):  
Ksenia N. Semenyuta ◽  
Anna A. Shmygareva ◽  
Anatoly N. Sankov
Keyword(s):  
Histological Analysis ◽  
Raw Materials ◽  
Raw Material ◽  
Histochemical Reaction ◽  
Closely Related Species ◽  
Histological Studies ◽  
Rheum Palmatum ◽  
Anthracene Derivatives ◽  
The Russian Federation ◽  
The Difference

Introduction. The aim of the study is to perform the anatomical and histological analysis of the roots of Rheum palmatum L. and Rheum officinale B., and also to check histochemical reactions for the presence of anthracene derivatives. Material and methods. The methodological basis of the anatomical and histological studies was the standard method for the preparation of micro-preparations of roots of Rheum palmatum L. and Rheum officinale B. described in the State Pharmacopoeia of the Russian Federation, XIV edition (OFS.1.5.3.003.15). Results and discussion. Anatomical and histological studies of Rheum palmatum L. and Rheum officinale B. raw materials confirmed the roots of Rheum palmatum L. to have classical secondary structure, while the roots of Rheum officinale B. have classical primary structure. The histochemical reaction to anthracene derivatives with 10% alkali solution was carried out, it resulted in cherry-red staining of core rays and some structures of cortical parenchyma of the fragment of Rheum palmatum L., while the roots of Rheum officinale B. failed to stain. Conclusions. The anatomical and histological studies of the rhizomes and roots of Rheum palmatum L. and Rheum officinale B. demonstrate the difference in the structure of closely related species of plants. It makes possible to identify the medicinal raw material of these plants.

scholarly journals Mathematical Investigation Proficiency among Singapore Secondary School Students: An Exploratory Study

2014 ◽  
Vol 4 (1) ◽  
pp. 3-21
Author(s):  
Joseph B. W. YEO
Keyword(s):  
Secondary School ◽  
Exploratory Study ◽  
Secondary School Students ◽  
Specific Problem ◽  
Prior Experience ◽  
School Students ◽  
Know How ◽  
Mathematical Investigation ◽  
Paper And Pencil ◽  
The Difference

This article presents an exploratory study to find out whether high-ability secondary school students in Singapore were able to deal with open mathematical investigative tasks. A class of Secondary One (or Grade 7) students, who had no prior experience with this kind of investigation, were given a paper-and-pencil test consisting of four open tasks. The results show that these students did not even know how to begin, despite sample questions being given in the first two tasks to guide and help them pose their own problems. The main difficulty was the inability to understand the task requirement: what does it mean to investigate? Another issue was the difference between searching for any patterns without a specific problem to solve, and searching for patterns to solve a given problem. The implications of these findings on teaching and on research methodologies that rely on paper-and-pencil test instruments will also be discussed.

scholarly journals Does corporate ownership affect capital structures and adjustment of capital structures — evidences from Chinese listed companies

2009 ◽  
Vol 6 (4) ◽  
pp. 532-541 ◽  
Author(s):  
Zhengwei Wang ◽  
Wei Lin ◽  
Michael Keefe
Keyword(s):  
Capital Structure ◽  
Transition Economy ◽  
Structural Difference ◽  
Firm Characteristics ◽  
Financial Friction ◽  
Listed Firms ◽  
Optimal Capital Structure ◽  
Study Results ◽  
Optimal Capital ◽  
The Difference

In Chinese transition economy, compared with state-owned firms, private firms face higher financial friction in financing activities, but have more incentive to adjust toward optimal capital structure to maximize the shareholders‟ benefit. Based on panel data of China’s listed firms from 1998 to 2007, we compare the capital structures of state-owned and privately-owned listed firms. The empirical results show that there is structural difference in static capital structure between state-owned and private listed firms while controlling for firm characteristics. We then investigate the difference in dynamics of the capital structure between these two groups of firms. Further study results tell us that the adjustment to an optimal capital structure to be faster for the private firm than for the state-owned firm.

scholarly journals STRATEGI GURU DALAM MENGOPTIMALKAN KECERDASAN MAJEMUK DI SEKOLAH DASAR

2021 ◽  
Vol 7 (1) ◽  
pp. 15
Author(s):  
Robiatul Munajah ◽  
Asep Supena
Keyword(s):  
Elementary Schools ◽  
Literature Review ◽  
Multiple Intelligences ◽  
Learning Process ◽  
Know How ◽  
Way Of Thinking ◽  
The Difference ◽  
The Given ◽  
Different Levels

The success of students in learning does not only depend on their own abilities. Several factors that can give effect need to be optimized. The teacher's strategy is very meaningful to optimize students' multiple intelligences according to the indicators that each student has. Every child in this world has various intelligences in different levels and indicators. This shows that all children, by nature, are intelligent. The difference lies in the level and indicators of intelligence. These differences are determined by various factors. One of them is the stimulation given when children learn in the learning process carried out by the teacher. The difference in intelligence among students demands a fair and existential way of thinking of educators. This research is a literature review to see more specifically the teacher's strategy in optimizing multiple intelligences in elementary schools based on research reference sources and books. Good educators are able to detect children's intelligence by observing the behavior, tendencies, interests, ways and qualities of children when reacting to the given stimulus. All indicators of intelligence can be recognized by educators to then make a profile of intelligence. Therefore, every teacher should know how to develop the intelligence of their students, by identifying each indicator of children's intelligence and realizing the importance of developing all the intelligences of their students. 

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