The influence of Trypanites in the diagenesis of Devonian stromatoporoids

1988 ◽  
Vol 62 (01) ◽  
pp. 22-31 ◽  
Author(s):  
S. George Pemberton ◽  
Brian Jones ◽  
Gregory Edgecombe
Keyword(s):  
Complex Interaction ◽  
Growth Stages ◽  
Initial Growth ◽  
Third Generation ◽  
Fort Mcmurray ◽  
Second Stage ◽  
The Third ◽  
Profound Influence ◽  
Two Generations ◽  
Two Stages

Stromatoporoids from the Late Devonian (early Frasnian) Waterways Formation near Fort McMurray, Alberta, contain well preservedTrypanitesMägdefrau. The stromatoporoid heads are formed of an initial growth ofClathrocoilona inconstansStearn that is encased by a second stage growth ofTrupetostroma papulosumStearn. These two stages were separated by a period of no growth and erosion. The first two generations of boring penetrated the skeleton ofC. inconstanswhile the third generation borings penetrated bothC. inconstansandT. papulosum.The borings in the stromatoporoids are filled with light colored micrite, dark colored micrite, skeletal fragments, dolomite, non-ferroan calcite, and ferroan calcite. Analysis of the borings, the growth stages of the stromatoporoids, the boring fill, and the orientation of the geopetal fabrics indicates that the stromatoporoids were subjected to repeated cycles of growth-boring-filling and reorientation. This complex interaction of biologic and physical reworking had a profound influence on the diagenetic transformation of the stromatoporoid heads. This example clearly illustrates the role that biogenic agents can play in the production of diagenetic fabrics of hard carbonate substrates.

The influence of Trypanites in the diagenesis of Devonian stromatoporoids

1988 ◽  
Vol 62 (1) ◽  
pp. 22-31 ◽  
Author(s):  
S. George Pemberton ◽  
Brian Jones ◽  
Gregory Edgecombe
Keyword(s):  
Complex Interaction ◽  
Growth Stages ◽  
Initial Growth ◽  
Third Generation ◽  
Fort Mcmurray ◽  
Second Stage ◽  
The Third ◽  
Profound Influence ◽  
Two Generations ◽  
Two Stages

Stromatoporoids from the Late Devonian (early Frasnian) Waterways Formation near Fort McMurray, Alberta, contain well preserved Trypanites Mägdefrau. The stromatoporoid heads are formed of an initial growth of Clathrocoilona inconstans Stearn that is encased by a second stage growth of Trupetostroma papulosum Stearn. These two stages were separated by a period of no growth and erosion. The first two generations of boring penetrated the skeleton of C. inconstans while the third generation borings penetrated both C. inconstans and T. papulosum. The borings in the stromatoporoids are filled with light colored micrite, dark colored micrite, skeletal fragments, dolomite, non-ferroan calcite, and ferroan calcite. Analysis of the borings, the growth stages of the stromatoporoids, the boring fill, and the orientation of the geopetal fabrics indicates that the stromatoporoids were subjected to repeated cycles of growth-boring-filling and reorientation. This complex interaction of biologic and physical reworking had a profound influence on the diagenetic transformation of the stromatoporoid heads. This example clearly illustrates the role that biogenic agents can play in the production of diagenetic fabrics of hard carbonate substrates.

scholarly journals Philosophy from the outside in: Rosenzweig’s critical project

2012 ◽  
Vol 23 (2) ◽  
pp. 65-76
Author(s):  
Willi Goetschel
Keyword(s):  
First Generation ◽  
Martin Buber ◽  
Third Generation ◽  
Literary Modernism ◽  
The Third ◽  
Jewish Thought ◽  
Two Generations ◽  
The University ◽  
Critical Intervention ◽  
Hermann Cohen

This paper examines Rosenzweig?s philosophic project in the context of his time as a critical intervention in the discussion of the place of Jewish thought in the university and in society. If Hermann Cohen represented the first generation of Jewish philosophers claiming that participation in the university is constitutive for the institution?s claim to universalism, the second generation-represented by Martin Buber - was more diffident about the university and its openness. For Buber, literary modernism offered what the university would refuse. Disappointed about the failure of the recognition of the efforts of the previous two generations, Rosenzweig represents the third generation. He turns the situation into a creative response anchoring philosophy as a project that calls for a resolute move outside the university.

Signs of polichnous deformations in microstructures of carbonate rocks of the Katav-Yuryuzan zone of transpression (Southern Urals)

2020 ◽  
pp. 13-21
Author(s):  
A. V. Tevelev ◽  
A. A. Borisenko ◽  
M. I. Erokhina ◽  
S. S. Popov ◽  
I. A. Kosheleva ◽  
...  
Keyword(s):  
Simple Shear ◽  
Carbonate Rocks ◽  
Pure Shear ◽  
Southern Urals ◽  
Second Stage ◽  
The Third ◽  
The North ◽  
Third Stage ◽  
Three Stages ◽  
Two Stages

The Katav-Ivanovsk transpression zone experienced at least two stages of tectonic deformations, and the sequence of deformations was approximately the same throughout the entire zone — from the Bakal-Satka fault in the south to the Suleimsky fault in the north. Three stages of the formation of parageneses were identified. The parageneses of the first and the second stages were formed in a pure shear environment, and the paragenesis of the third stage — in a simple shear environment. There are stylolites (S1) parallel to bedding, and mineral veins (V1) in the paragenesis of the first stage. Paragenesis of the second stage combines stylolites (S2), mineral veins (V2) and intergranular cleavage (S2). In paragenesis of the third stage were distinguished schistosity (S3), milonites (S3), cataclasites, mica packets (SC-textures), and the rotation structures of porphyroblasts.

Study on Dislocation Behaviors during PVT Growth of 4H-SiC

2019 ◽  
Vol 963 ◽  
pp. 64-67 ◽  
Author(s):  
Im Gyu Yeo ◽  
Tai Hee Eun ◽  
Jang Yul Kim ◽  
Seung Suk Lee ◽  
Han Seok Seo ◽  
...  
Keyword(s):  
Grown Crystal ◽  
Temperature Gradients ◽  
Initial Growth ◽  
Internal Temperature ◽  
Second Stage ◽  
Initial Stage ◽  
Basal Plane Dislocation ◽  
Two Stages ◽  
Surface Morphologies ◽  
Edge Dislocations

The generation and transformation of dislocations in 4H-SiC crystals grown by PVT were investigated. Experiments were carried out in two stages for more comprehensive observation on dislocation behaviors. For the first stage known as initial growth, we investigated mainly the seed and grown interface. The behavior and transition of the dislocations in grown crystal were observed along the length of the crystal at second stage. The formation of threading edge dislocations (TEDs) strongly depends on the surface morphologies related with internal temperature gradients during crystal growth. The basal plane dislocation (BPDs) and threading screw dislocation (TSDs) cause from the seed crystal and formed at the initial stage of growth were gradually decreased in number along the length of the crystal and under certain conditions such as distorted stresses, dislocations were converted into other types of dislocations.

Moving from the second to the third generation Roche PTH assays: what are the consequences for clinical practice?

2018 ◽  
Vol 57 (2) ◽  
pp. 244-249 ◽  
Author(s):  
Anne Marie Dupuy ◽  
Anne Sophie Bargnoux ◽  
Marion Morena ◽  
Emilie Lauret ◽  
Jean Claude Souberbielle ◽  
...  
Keyword(s):  
Clinical Practice ◽  
Kidney Disease ◽  
Third Generation ◽  
Mineral And Bone Disorder ◽  
The Third ◽  
Ckd Stage ◽  
Bone Disorder ◽  
Two Generations ◽  
Roche Diagnostics

AbstractBackgroundThe determination of parathyroid hormone (PTH) is essential for exploring phosphocalcic disorders especially in patients with renal failure. At present, second or third generation PTH assays are available on the market from Roche Diagnostics as well as from others companies but the lack of standardization has complicated the interpretation.MethodsWe wanted to assess the clinical impact by measuring the PTH levels with the two generations concomitantly on different groups of populations including 46 healthy, 103 pre-dialyzed and 73 hemodialyzed (HD) patients.ResultsIn healthy subjects, the PTH concentrations were not different whatever the generation used, whereas beyond 200 pg/mL, we reported an overestimation of the second generation PTH. In patients with chronic kidney disease (CKD) stage 3–5 the observed differences between the two generations increase with increasing PTH levels and decreasing glomerular filtration rate (GFR). Classification according to the kidney disease: improving global outcomes (KDIGO) revealed a high percentage of discordant results between the two generations (κ coefficient <0.20). These discrepancies are clinically relevant as PTH levels remain the cornerstone for diagnosis and treatment of the CKD-mineral and bone disorder (CKD-MBD).ConclusionsThe introduction of a new PTH assay generation in clinical practice should be carried out with caution.

scholarly journals CdSe/ZnS Quantum Dots Impaired the First Two Generations of Placenta Growth in an Animal Model, Based on the Shh Signaling Pathway

Nanomaterials ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 257 ◽  
Author(s):  
Wuding Hong ◽  
Huijuan Kuang ◽  
Xingping He ◽  
Lin Yang ◽  
Pengfei Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Perinatal Period ◽  
Signal Pathway ◽  
Third Generation ◽  
The Third ◽  
Two Generations ◽  
Key Genes ◽  
F2 Generation ◽  
Maternal Status

The toxicity, especially the transgenerational toxicity of quantum dots (QDs) in vivo, is still scarcely understood in spite of great promising applications of QDs in biomedicine. In this study, the maternal status, pregnancy outcome, and fetus development of parental generation (P0) to offspring in three generations (F3) were investigated after Kunming mice perinatal (GD 13-PND 5) exposure to Cd containing QDs (CdSe/ZnS QDs) and CdCl2. The results show CdSe/ZnS QDs induced placenta injuries in P0 and diminished placenta diameters in F1 and F2. Bodyweight growth decreased in the CdSe/ZnS QDs treatment group in the F1 and F2 generation. Additionally, CdSe/ZnS QDs significantly altered the expression of key genes in the Shh signal pathway. Overall, this study exhibited that the CdSe/ZnS QDs exposure during perinatal period impaired placenta growth in the first two generations, but not on the third generation. The toxicological actions of the CdSe/ZnS QDs might be through the effects on the Shh signal pathway.

Big boots to fill—the next generation continuing differently

2016 ◽  
Vol 17 (2) ◽  
pp. 133-139 ◽  
Author(s):  
Eric Clinton ◽  
Justin B. Craig ◽  
Vanessa Diaz-Moriana ◽  
Catherine M. Faherty
Keyword(s):  
Corporate Governance ◽  
Undergraduate Students ◽  
Family Business ◽  
Case History ◽  
Third Generation ◽  
Entrepreneurial Leadership ◽  
The Third ◽  
Family Issues ◽  
Spanish Family ◽  
Two Generations

This case history describes the challenge facing Carlos García, the third-generation successor of a Spanish family business, as he takes over the reins of Hispalis and prepares to continue the business ‘differently’. In two generations, Hispalis has morphed into a global conglomerate, with a portfolio of business ventures in multiple industries and countries. The case history facilitates discussion of business and family issues and is appropriate for beginning-level undergraduate students in the areas of entrepreneurial leadership, family business, strategic management and corporate governance.

scholarly journals Robust security against cyber threats with variety of captchaGüvenlik kodu çeşitliliği ile siber tehditlere karşı güçlü güvenliğin sağlanması

2018 ◽  
Vol 15 (3) ◽  
Author(s):  
Huseyin Çakır ◽  
Necla Uluhatun
Keyword(s):  
Full Text ◽  
English Summary ◽  
Rapid Progress ◽  
Second Stage ◽  
Cyber Threats ◽  
The Third ◽  
Third Stage ◽  
Combination Test ◽  
Will Force ◽  
Two Stages

Cyberspace also brings about cybercrime, which is evolving along with the rapid progress of technology and internet. Captchars are used as a layer of security to prevent these crimes. It is a security mechanism designed to distinguish whether an entry is made by the user when entering a system and is used for protection against malicious bot programs. For this reason, it is important that the introduction is done by human or bot software.In this study, a safer Captcha combination test was presented based on Captcha types and Captcha studies. The proposed approach basically consists of three steps. In the first step, the user is asked to test with a simple text-based Captcha to avoid the difficulty of captcha testing. The second stage, when the first stage test is unsuccessful, offers a more complicated captcha test with text and picture. In the third stage, different-based captcha are presented which are more complex than the first two stages and will force the user. This approach makes it easier to distinguish the bot with the user, and the bot program's algorithm can be challenged with the variety of captcha combinations created. Extended English summary is in the end of Full Text PDF (TURKISH) file.ÖzetSiber dünyada, teknoloji ve internetin hızla ilerlemesi beraberinde gelişmekte olan siber suçları da getirmektedir. Güvenlik kodlar (captcha) bu suçları engellemek amacıyla oluşturulan bir güvenlik katmanı olarak kullanılırlar. Bir sisteme giriş yapıldığında girişin kullanıcı tarafından yapılıp yapılmadığının ayırt edilebilmesi için tasarlanmış bir güvenlik mekanizması ve kötü niyetli bot programlarına karşı korunma amaçlı kullanılır. Bu nedenle girişin insan mı yoksa bot yazılımı tarafından mı yapıldığı önem arz etmektedir.Bu çalışmada, Güvenlik kod (captcha) türleri ve yapılan Güvenlik kod (captcha) çalışmaları baz alınarak daha güvenli bir Güvenlik kod (captcha)  kombinasyon testi sunulmuştur. Önerilen yaklaşım temelde üç aşamadan oluşmaktadır. İlk aşamada kullanıcının Güvenlik kod (captcha) ile imtihanını zorlaştırmamak için metin tabanlı basit Güvenlik kod (captcha) ile test edilmesi istenmektedir. İkinci aşamada, ilk aşama testi başarısız olduğunda metin ve resim tabanlı daha zorlaştırılmış Güvenlik kod (captcha) testi sunulmaktadır. Üçüncü aşamada ise ilk iki aşamadan daha karmaşık ve kullanıcıyı zorlayacak farklı tabanlı Güvenlik kodu (captcha)  sunulmaktadır. Bu yaklaşım ile kullanıcı ile bot ayırımı daha kolay yapılabilmekte ve oluşturulan Güvenlik kodu (captcha)  birleşim çeşitliliği ile bot programlarının algoritmasına meydan okunabilmektedir. 

Conclusions

Born to Write ◽  
2020 ◽  
pp. 294-296
Author(s):  
Neil Kenny
Keyword(s):  
Family Members ◽  
Third Generation ◽  
Next Generation ◽  
High Profile ◽  
The Third ◽  
Two Generations ◽  
Principal Factors ◽  
The Many ◽  
Royal Household

The Marot family is a high-profile example of poetic craft enabling spectacular social ascent, and doing so across two generations. Such cases were rare, given the sheer fragility of such poetry-propelled ascent. Even in this case it did not benefit all family members equally—women less than men—and petered out despite a faint attempt to continue it in the third generation. The fragility was that of the two principal factors in the ascent: craft itself, which, as artisans had long known, could be even more difficult to transmit to the next generation than wealth; and royal-household employment, which was fraught with intrinsic uncertainties. The kind of patrimony produced within the Marot family was more narrowly based, as well as more fragile, than that of the many families that held high royal offices and aspired to multigenerational, dynastic continuity.

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