Thematische Bibliographien / CTEV

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Auswahl der wissenschaftlichen Literatur zum Thema „CTEV“

Autor: Grafiati
Veröffentlicht am 29. Juni 2021
Zuletzt aktualisiert am 1. Februar 2022

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Zeitschriftenartikel zum Thema "CTEV"

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Irfannuddin, Irfannuddin, Nur Rachmat Lubis und Febian Aji Wicaksono. „Evaluation of CTEV Management in Children's Walking Ability Assessed by "BANGLA" Club Foot Tool Score System“. Bioscientia Medicina : Journal of Biomedicine and Translational Research 4, Nr. 1 (01.01.2020): 48–57. http://dx.doi.org/10.32539/bsm.v4i1.113.

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Abstract Congenital talipes equinovarus (CTEV) or clubfoot is a congenital deformity that involves an abnormal position of the calcaneonaviculare complex. "Bangla clubfoot tool score system" is an assessment that indicates the effectiveness of CTEV management. The purpose of this study was to evaluate the management of CTEV on children's ability to walk as assessed by the Bangla clubfoot tool score system. A cross sectional study was conducted at the Hospital Dr. Mohammad Hoesin Palembang. There were 24 CTEV patients who received CTEV management before the age of 3 years and were not associated with a neurological disorder. A comparison of the average total Bangla clubfoot score tool system was analyzed by assessing parental satisfaction, walking ability and clinical examination. The majority of CTEV patients were women (58.3%) with and mostly being treated before 1 year old (79.2%). The most types of CTEV were bilateral (70.8%), and most of them performed surgery (66.7%). Assessment with the Bangla clubfoot tool system shows that the level of parental satisfaction is sufficient, gait is good, but physical foot examination is poor (20%). The score is influenced by age at first therapy and compliance using the brace. Parents must continue to support their children to undergo integrated management after therapy to maintain their walking ability.
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Laud, N., B. B. Joshi und S. S. Warrier. „Correction of CTEV by Jess“. Journal of Pediatric Orthopaedics B 6, Nr. 4 (Oktober 1997): 293. http://dx.doi.org/10.1097/01202412-199710000-00048.

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3

Baruah, Prabahita, Pradipta Ray Choudhury und K. L. Talukdar. „Study of congenital talipes equinovarus cases and its radiological correlation“. National Journal of Clinical Anatomy 02, Nr. 03 (Juli 2013): 134–39. http://dx.doi.org/10.1055/s-0039-3401715.

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Abstract Background and aims : congenital talipes equinovarus (CTEV) or club foot is one of the most common congenital orthopaedic anomalies and is increasing day by day with the growing millions of this country. However, it still continues to challenge the skills of the surgeons as it has a notorious tendency to relapse. Part of the reason behind its relapse is the failure to recognize the underlying pathoanatomy. Again the controversy regarding the radiographic parameter which best represents the deformity of club foot still continues. However, the talocalcaneal angle in both AP (anterior-posterior) and lateral view is considered as the best parameter to diagnose a case of CTEV radio graphically. The aim of the study is to study the cases of CTEV and their radiological correlation. Materials and methods : Sixty cases of CTEV attending the orthopaedic OPD, Gauhati Medical College were taken for study. Clinical history, photographs and radiographs (X-rays) of these cases were taken. Results and observations : out of 60, 63.3% cases were male, 43.3% cases were bilateral, 36.04% cases showed the talocalcaneal angle (AP view) ranging 260 - 300. Conclusion : The talocalcaneal angles, in both, AP (anterior-posterior) and a lateral view, in a normal foot is more than 35 degrees, but in CTEV these are reduced. Functional anatomy of CTEV is a prerequisite for achieving an aligned and supple foot with a good prognostic value.
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Todd, Maya Rani Louise Chandra, Stephen Sikaveke Kodovaru, Georgia Antoniou und Peter J. Cundy. „Clubfoot deformity in the Solomon Islands: Melanesian versus Polynesian ethnicity, a retrospective cohort study“. Journal of Children's Orthopaedics 14, Nr. 4 (01.08.2020): 281–85. http://dx.doi.org/10.1302/1863-2548.14.190172.

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Purpose Congenital talipes equinovarus (CTEV) has a high incidence in the South Pacific, with New Zealand Maori and Polynesian rates of up to seven per 1000 live births, at least five times higher than the Caucasian population. A genetic component is suggested to explain this, however, there is little information regarding the difference of incidence between Polynesian and Melanesian ethnicity in the South Pacific. Our aim was to investigate the effects of ethnicity on the incidence of CTEV in the Solomon Islands, specifically comparing Melanesian and Polynesian ethnicity. Methods Between 2011 and 2017, data was collected in the Solomon Islands from over 40 clinics upon introduction of the Ponseti programme for treatment of CTEV. Records were kept using the validated Global Clubfoot Initiative data form. Ethnicity was documented, including family history. Results In total, 138 children presented during this period, with 215 affected feet reviewed and treated. In all, 74% of children had solely Melanesian parents and 6% Polynesian. Using the general population ethnic breakdown of 95.3% Melanesian and 3.1% Polynesian, the odds of CTEV in children of Melanesian parents were 0.41 times lower compared with the odds in children of Polynesian parents. Conclusion The results indicate that in the Solomon Islands, CTEV in Melanesian children was less than half as likely to occur in Polynesian children. Our findings also support the theories of minimal Polynesian genetic material persisting in the Solomon Islands and a different genetic risk of CTEV between Polynesians and Melanesians. Level of Evidence III
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Sananta, Panji, Tita Hariyanti, Ledy Kumala Devi, I. Gusti Ngurah Arga Aldrian Oktafandi und Felix Cendikiawan. „Determining Reasons Affecting the Late Treatment of Congenital Talipes Equinovarus: A Qualitative Study“. Global Journal of Health Science 13, Nr. 10 (13.09.2021): 91. http://dx.doi.org/10.5539/gjhs.v13n10p91.

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BACKGROUND: Neglected congenital talipes equinovarus (CTEV) is a serious problem commonly found in developing countries. This deformity has fatal impacts, including disabilities and educational limitations. Moreover, cases of neglected CTEV are still frequent in Indonesia as one of the developing countries. Thus, this study aims to investigate the reasons behind the late treatment of CTEV. METHODS: This is a qualitative study conducted throughout September 2019. The subjects are six parents of patients with neglected CTEV who are currently being treated in our hospital. The study was conducted by performing an in-depth interview with the patient’s parents to analyze why they delay checking their child to an orthopaedic surgeon. The results were then grouped into themes. RESULTS: The reasons for the delay were multifactorial. Four subjects had more than one reason why they delayed checking their child to an orthopaedic surgeon. The reason for the delay were socioeconomic factors (3 subjects), medical-related problems (3 subjects), intentionally delayed or refused to seek medical care (2 subjects), and misinformation from the previous physician (3 subjects). CONCLUSIONS: The reasons for the late treatment of CTEV were socioeconomic factors, medical-related problems, intentional factors, and misinformation.
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Saif Ullah, Md, Kazi Md Noor-ul Ferdous, Md Shahjahan und Sk Abu Sayed. „Management of Congenital Talipes Equino Varus (CTEV) by Ponseti Casting Technique in Neonates: Our Experience“. Journal of Neonatal Surgery 2, Nr. 2 (28.03.2013): 17. http://dx.doi.org/10.47338/jns.v2.29.

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Objective: The purpose of this study is to evaluate the results of Ponseti technique in the management of congenital Talipes Equino Varus (CTEV) in neonatal age group.Methods: It is a prospective observational study, conducted during the period of July 2010 to December 2011 at the Department of Pediatric Surgery in a tertiary hospital. All the neonates with CTEV were treated with Ponseti casting technique. Neonates with other congenital deformities, arthrogryposis and myelomeningocele were excluded.Results: Total 58 CTEV feet of 38 neonates were treated. Twenty six were males and 12 were females. Thirty seven (63.8%) feet were of rigid variety and 21(36.2 %) feet were of non-rigid variety. Twenty patients had bilateral and 18 had unilateral involvement. Mean pre-treatment Pirani score of study group was 5.57. Mean number of plaster casts required per CTEV was 3.75 (range: 2-6). Thirty five rigid and 15 non-rigid (total 86.2%) feet required percutaneous tenotomy. Out of 58 feet 56 (96.6%) were managed successfully. Three (5.2%) patients developed complications like skin excoriation and blister formation. Mean post-treatment Pirani score of the study group was: 0.36 ± 0.43.Conclusion: The Ponseti technique is an excellent, simple, effective, minimally invasive, and inexpensive procedure for the treatment CTEV deformity. Ideally it can be performed as a day case procedure without general anesthesia even in neonatal period.
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Paton, R. W., und C. S. B. Galasko. „Accurate structural assessment of idiopathic CTEV“. Foot 1, Nr. 2 (Juli 1991): 71–73. http://dx.doi.org/10.1016/0958-2592(91)90033-8.

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Gupta, Sanjeev, Farooq Bhutt, Manoj Kumar und Maneer Ahmad. „Outcome of treatment with modified Ponseti technique in atypical congenital talipes equinovarus“. International Journal of Research in Medical Sciences 9, Nr. 1 (28.12.2020): 53. http://dx.doi.org/10.18203/2320-6012.ijrms20205655.

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Background: The atypical congenital talipes equinovarus (CTEV) patients tend to have a different clinical foot presentation with small great toe, deep transverse crease of sole, tender swollen dorsum of foot and rigid equinus.Methods: This study was conducted in GMC Jammu to evaluate efficacy of modified Ponseti technique in atypical CTEV patients. It was a prospective study and the patient data was collected during OPD visits of patients from August, 2018 to June, 2020. Twenty-one patients were diagnosed as atypical CTEV and were managed with modification of conventional Ponseti technique and percutaneous release of achilles tendon was done in all patients. Three patients were lost to follow-up. Hence, the final number of study participants was 18 (n=18).Results: With modified Ponseti technique, functional correction was achieved in all the patients in our study. The average number of casts required was 8 (range; 5-10). At final follow-up visit, all feet are functionally corrected. Only one case of relapse was seen.Conclusions: Early diagnosis and treatment with modified Ponseti technique is an effective and easy method of treatment in atypical CTEV.
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Jain, Akshay, Adhir Jain, Ravi Kant Jain und Prateek Pathak. „Computed dynography, a method for evaluation of gait pattern in treated cases of congenital talipes equino varus“. International Journal of Research in Orthopaedics 6, Nr. 3 (22.04.2020): 611. http://dx.doi.org/10.18203/issn.2455-4510.intjresorthop20201105.

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<p class="abstract"><strong>Background:</strong> Club foot is characterized by inversion, adduction and equinus. Currently, evaluation of children treated for congenital talipes equino varus (CTEV) includes clinical and radiological examination as well as assessment of function. However, none of the methods is ideal. There should<strong> </strong>be objective methods for better evaluation of function in treated CTEV. Gait analysis is the emerging method in objectively assessing the functional outcome. The aim of the study was to compare the selected measures from vertical ground reaction force variables and gait parameters of treated CTEV children with plantigrade feet, to healthy age and gender matched control group.</p><p class="abstract"><strong>Methods:</strong> We took 31 children with treated CTEV with mean age 8.21 years<strong> </strong>and compared with 31 age and gender matched controls. The patients were initially treated under a standard protocol. Gait cycle properties, step time parameters and vertical ground reaction force variables were recorded and comparison of unilateral and bilateral cases of treated CTEV was done with that of controls.<strong></strong></p><p class="abstract"><strong>Results:</strong> Data showed that despite good clinical results and overall function, residual intoeing, lateral foot walking, mild foot drop, weak plantar flexor power, possible residual inversion deformity of the foot, increased frequency and decreased duration of cycle and asymmetry in gait were the main characteristics of gait of children with treated CTEV. In unilateral cases single and double support times were decreased and in bilateral CTEV double support times are increased.</p><p class="abstract"><strong>Conclusions:</strong> The study confirms that in clubfoot patients who underwent full treatment, gait parameters do not reach normal levels. Gait analysis can be used to quantify gait pattern characteristics and is helpful in evaluation and further development of treatment of patients.</p>
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Agarwal, Anil, Anubrat Kumar, Abbas Shaharyar und Madhusudan Mishra. „The Problems Encountered in a CTEV Clinic“. Foot & Ankle Specialist 9, Nr. 6 (20.09.2016): 513–21. http://dx.doi.org/10.1177/1938640016666916.

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Background. The aim of the study is to create awareness in the practicing health care workers toward the problems encountered during casting and bracing of clubfoot following Ponseti method, and in turn avoid them. Material and Patients. Retrospective audit of 6 years’ clubfoot clinic records to analyze problems associated with Ponseti method. Observations. Problems were encountered in 26 cast and in 6 braced patients. Just 4 patients out of 71 syndromic (5.6%) experienced problems during casting compared with 3% overall incidence. The common problems encountered in casted patients were moisture lesions, hematoma, dermatitis due to occlusion, pressure sores, and fractures. There was excessive bleeding in 1 patient at time of tenotomy. In braced patients, pressure sores and tenderness at tenotomy site were major problems. None of the syndromic patients experienced difficulties during bracing. Conclusions. Problems were encountered with Ponseti method during casting, tenotomy, or bracing. Syndromic children had lesser complication rate than idiopathic clubfeet. It is important to be aware of these problems so that appropriate intervention can be done early. Levels of Evidence: Level IV: Retrospective
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Dissertationen zum Thema "CTEV"

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Horn, Anria. „The effect of a change in plastering technique on the rate of Major Surgery in Congenital Talipes Equinovarus(CTEV)“. Master's thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/21745.

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The Ponseti technique of manipulation and casting is reported to have almost eliminated the need for extensive soft tissue release in the treatment of idiopathic clubfoot. This technique of treatment has however not been universally adopted and results of treatment vary significantly between treatment centres. Furthermore, surgical decision making in the treatment of clubfoot is currently largely based on clinical findings as opposed to radiographic parameters. The Ponseti method of manipulation and casting was introduced at our institution in 2002, prior to which we used the Kite method. Both prior to, and following the introduction of Ponseti casting, surgical decision making was based on pre-operative radiology, and intra-operative clinical assessment. We propose to determine the impact on this change of plastering technique on the rate of major surgery performed primarily in our patients with idiopathic clubfoot. We also aim to determine whether or not pre- operative radiographs have any bearing on the surgery performed on these patients.
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Larsen, Josefin, und Matilda Strömbäck. „Comparison of orthotic interventions for patients with congenital talipes equinovarus: a systematic review“. Thesis, Jönköping University, HHJ. Ortopedteknisk plattform, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-53054.

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Aim: The aim with this study is to compare different orthotic solutions for pediatric patients with congenital talipes equnivarus.  Method: A search in the databases MEDLINE, CINAHL, PubMed and Scopus were made, and studies was included after the predefined criteria. The included studies were reviewed for risk of bias and validity, relevant data was extract and analyzed with regards to the research question.  Result: The result was presented on 15 different orthotic interventions in 21 different articles. The reported outcome measures were compliance, recurrence of deformity, Pirani- and Dimeglio score, range of motion and functional outcomes.  Conclusion: Based on the results a recommendation cannot be made on what orthosis that gives the best result. Future research should focus on developing and designing an orthosis that satisfies the patient's needs.
Syfte: Syftet med detta arbete är att undersöka olika ortos-lösningar med dess inkluderade resultat för patienter med kongenital idiopatisk klumpfot. Metod: En systematisk sökning i databaserna MEDLINE, CINAHL, PubMed and Scopus genomfördes och väsentliga studier inkluderades utefter de förbestämda kriterierna. Inkluderade studiers validitet och möjliga partiskhet bedömdes samt att relevant data utifrån frågeställningen analyserades och besvarades.  Resultat: Resultatet presenterade 15 olika typer av ortoser, i 21 olika artiklar. De presenterade utfallsmåtten var inom komplians, återfall av deformationen, Pirani- och Dimeglio poäng, rörelseomfång samt inom funktionellt resultat. Slutsats: Baserat på resultat går det inte att presentera en övervägande slutsats om vilken ortos-lösning som ger bäst resultat. Framtida forskning måste utveckla och framställa ortoser som tillfredsställer och möter patienternas behov.
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Ribeiro, Ot?vio Augusto Silva. „Bebida l?ctea fermentada elaborada com Camellia sinensis“. UFVJM, 2013. http://acervo.ufvjm.edu.br:8080/jspui/handle/1/401.

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Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES)
A presente pesquisa foi conduzida com o objetivo de se desenvolver e caracterizar bebida l?ctea fermentada formulada com Camellia sinensis. Procedeu-se a elabora??o da infus?o de folhas desidratadas e picadas de C. sinensis em soro l?cteo (1g.100g-1) a qual foi adicionada em leite ado?ado (sacarose 10% p/p), coagulado por Streptococcus salivarius subsp. thermophilus e Lactobacillus delbrueckii subsp. bulgaricus nas propor??es de 10, 20, 30 e 40% (v/p). O controle consistiu em iogurte adicionado com sacarose (10% p/p). Procedeu-se ?s determina??es de massa seca, umidade, res?duo mineral fixo, prote?na, gordura, s?dio, acidez, quantifica??o de bact?rias l?ticas totais, atividade antioxidante total e viscosidade no tempo inicial de fabrica??o e em 15 e 30 dias de armazenamento. No produto, em seu tempo inicial de fabrica??o, procedeu-se a determina??o cromatogr?fica de compostos vol?teis e ? condu??o dos testes sensoriais de aceita??o e inten??o de consumo. O teor de massa seca, a umidade, res?duo mineral fixo e contagem total de bact?rias l?ticas de formula??es de bebida l?ctea fermentada n?o foram significativamente afetados pela quantidade de infus?o de C. sinensis adicionada. Entretanto, o conte?do de prote?na, gordura e s?dio foram significativamente menores, quanto maior a percentagem de infus?o incorporada ao produto. Houve redu??o significativa na viscosidade aparente do produto mediante o aumento da quantidade de infus?o adicionada. A atividade antioxidante total das formula??es foi significativamente maior quanto maior a quantidade de infus?o adicionada. A adi??o de infus?o contribuiu para a diversifica??o de compostos vol?teis formadores de aroma e sabor no produto. A formula??o de bebida l?ctea fermentada, com adi??o de 30% de infus?o de C. sinensis em soro l?cteo, foi a preferida em testes sensoriais, com maior aceita??o e maior inten??o de consumo.
Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2013.
ABSTRACT The aim of this research was to develop and to characterize fermented dairy beverage formulated with Camellia sinensis. Infusion was elaborated with the addiction of dehydrated leaves of C. sinensis in whey (1g.100g-1) which added in sweetened milk (10% sucrose w/w) coagulated by Streptococcus salivarius subsp. thermophilus and Lactobacillus delbrueckii subsp. bulgaricus in proportions of 10, 20, 30 and 40% (v/ w). The control treatment consisted of yogurt added with sucrose (10% w / w). Analysis were performed to quantify dry mass, moisture, ash, protein, fat, sodium, acidity, total quantification of lactic acid bacteria, total antioxidant activity and viscosity at the initial time of production and at 15 and 30 days of storage. Chromatographic determination of volatile compounds and sensory tests of acceptance and consumption intention were conducted at the initial time of production. Dry matter content, moisture, ash and total count of lactic acid bacteria from fermented milk drink formulations were not significantly affected by the amount of infusion of C. sinensis. However, the content of protein, fat and sodium were significantly lower with the increase of the proportion of infusion incorporated into the product. Significant reduction in apparent viscosity occurs with the increase in the amount of infusion added. The total antioxidant activity of the formulations was significantly higher as higher were the amount of added infusion. The addition of infusion contributed to the diversification of volatile aroma and taste makers in the product. The formulation of fermented dairy drink with addition of 30% Infusion C. sinensis was better evaluated in sensory tests, with greater acceptance and greater consumer intent of consumption.
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AlGhamdi, Saleh Mohammed S. „An investigation of CTen signalling and regulation in cancer“. Thesis, University of Nottingham, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.606811.

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C-terminal Tensin-like (Cten) is a member of the Tensin gene family but lacks the N-terminus actin-binding domain. Cten functions as a tumour suppressor in some cancers while in other cancer types it is recognized to have oncogenic activities. Our group has previously shown that, in colorectal cancer (CRC), Cten is up-regulated and acts as an oncogene which alters several cellular functions including cell migration and invasion. In this project we tried to understand (a) the mechanism through which Cten affects cell function and (b) the mechanisms by which Cten expression may be controlled in cancer. Three cancer models system (colorectal, pancreatic and lung cancer) have been tested to validate our observations. (a) Since Cten is found in complex with integrins at focal adhesions, we hypothesized that it may influence other molecules which are associated with focal adhesion and integrin function. Through a combined approach of forced expression and knockdown experiments, we examined the effect of Cten on ILK and FAK. We found that Cten positively regulates expression of both ILK and FAK and this may be the mechanism through which cell motility is controlled. (b) (i) Activation of the Epidermal Growth Factor Receptor (EGFR) signalling pathway in breast cancer results in up-regulation of Cten accompanied by down-regulation of Tensin 3 (known as the "Tensin switch"). We tested this in CRC and found that stimulation and inhibition of the EGFR using recombinant EGF and the EGFR inhibitor PD135053, resulted in changes in Cten expression (with a tensin switch) and changes in cell motility. Since EGFR classically signals through Kras/Braf we hypothesized that Kras (which is frequently mutated in CRC) may regulate Cten expression. Analysis of CRC cell lines showed an association between Kras/Braf mutation and high Cten expression. Knockdown of Kras in cell lines harbouring Kras mutations resulted in loss of Cten expression while no effect was observed in the cell lines with Braf ,mutations. However Braf knockdown in cell lines with Braf mutation resulted in down-regulation of Cten levels. (ii) CD24 has been shown to be associated with integrins suggesting a possible involvement with Cten at Focal Adhesions. Manipulation of CD24 protein levels in CRC cell lines was mirrored by changes in Cten expression although this effect was not accompanied by a tensin switch. (iii) STAT3 can function as both a tumour suppressor and an oncogene. Modulation of STAT3 levels - either directly through gene knockdown or indirectly through IL-6 stimulation - showed that STAT3 is a negative regulator of Cten. Since around 90% of pancreatic cancers and 60% of lung cancers have Kras mutations we repeated the experiments in these two models. Our data showed that functional activity and regulation of Cten was similar to that seen in CRCs. We can conclude that Cten can regulate cell motility through modulation of FAK and ILK. In addition, Cten is regulated by EGFRKras- Braf signalling and that CD24 and STAT3 are also, respectively, positive and negative regulators of Cten. Finally, Cten activity is broadly consistent in three different cancer models. Future studies should involve further refinement of the signalling pathway and study of other tumour types involving frequent Kras mutations. ..
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Akhlaq, Maham. „Investigation of Cten signalling and regulation in colorectal cancer“. Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/32802/.

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Cten (also known as Tensin4) is the fourth member of the Tensin gene family. It lacks the N terminal actin binding domain while retaining the C terminal SH2 and PTB domains. This helps to bind Cten to the intracytoplasmic tail of β1 integrin and puts it at the heart of focal adhesions. It is reported to be a tumour suppressor in kidney and prostate cancer where normal tissues show high expression. However in a number of tumours, including colorectal cancer, Cten has been labelled as an oncogene. Cten which normally is a cytoplasmic protein gives nuclear staining in colorectal metastatic deposits. It increases motility, invasion and colony formation in colorectal cancer cells. In this study we have tried toexplore the mechanism of functional activity and regulation of Cten. We looked at Cten in the nucleus in vitro and identified new downstream binding targets. In addition we investigated the role of the SH2 domain of Cten concentrating on its downstream signalling molecules and binding partners. Furthermore, we explored regulators of Cten. In this study we have forced nuclear localisation of Cten by tagging it with a nuclear localisation sequence (NLS) and found a significant increase in cell motility. In order to investigate the SH2 domain we used site directed mutagenesis to change potentially important amino acids namely Arginine at 474 to Alanine (R474A), which is important for binding tyrosine phosphorylated proteins. Moreover, we displayed that Cten underwent tyrosine phosphorylation and additionally changed three tyrosine residues i.e. Y449F, Y479F and Y530F via site directed mutagenesis. We found R474 and Y479 to be important in regulating cell motility and that known downstream targets such as ILK and FAK are dependent on an intact SH2 domain. Furthermore we have identified Cten to be physically bound to FAK in the cytoplasm and nucleus and new downstream targets identified such as Src and Paxillin. Regarding possible regulators of Cten, we found that Cten might be a possible substrate for calpain. Another regulator considered was CD24 due to its role in movement of integrins into lipid rafts and we found it was a positive regulator of Cten. In conclusion localisation of Cten into the nucleus causes an augmentation of its motility enhancing functions. Cten regulates cell motility via its SH2 domain. Arginine 474 and Tyrosine 479 are important for its function. Cten regulates levels of ILK, FAK, Src and Paxillin through its SH2 domain and binds to FAK in both cytoplasm and nucleus. Calpain and CD24 were found to possible regulators of Cten in colorectal cancer. Future studies are needed to define its role in signalling at focal adhesions and these studies should be validated in other cancer cell models as well to establish Cten as regulator of cell motility in cancer.
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Allen, Kim M. „The Perceptions of Career and Technical Education (CTE) Teachers on the Influence of CTE on Student Engagement“. Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/29626.

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Learning in school requires active engagement. Student engagement is an important aspect for all students, whether urban, suburban, or rural, and regardless of socioeconomic background. Students enter Career and Technical Education (CTE) programs for a multitude of reasons and CTE programs offer unique support for student success by increasing student engagement. This study will focus on CTE teachers' perceptions of the influence that CTE programs and industry credentialing have on student engagement. Utilizing information on student engagement will help educators develop strategies to promote student motivation and student engagement, thus leading to student academic success. This study is a quantitative, descriptive statistical study in which the researcher examined studies that focused on student engagement and student engagement predictors. The research identified six qualities of student engagement: positive conduct and absence of disruptive conduct, school attendance, academic progress, social membership, high expectations in students' ability to achieve, and emotional support. The researcher developed a survey to examine teachers' perceptions of CTE influence on student engagement by including the six qualities of student engagement as guidelines for questionnaire development. Results of the survey indicate that CTE teachers identify all six domains of student engagement as represented within their course structure. Responses of all groups were similar, while their levels of industry involvement different. Additional results of all teacher responses are provided in the paper.
Ed. D.
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Asiri, Abdulaziz. „Investigations into the role of Cten signalling in colorectal cancer“. Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/52233/.

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C-terminal tensin-like (Cten, also known as Tensin4) is the member of the tensin gene family. Cten functions as an oncogene in a variety of cancer types and its expression is commonly associated with poor prognosis and metastasis in colorectal cancer (CRC). Although several studies have shown that Cten has a critical role in the regulation of cell motility and invasion in different tumour tissues, the underlying signalling mechanisms have not been fully elucidated. This thesis investigated the biological activity of Cten in four different ways in order to further elucidate the mechanisms of Cten signalling in CRC cells. Potential downstream targets of Cten signalling involved in the regulation of epithelial-to-mesenchymal transition (EMT) induced cell motility i.e. Rho-associated protein kinase1 (ROCK1), Src and Snail were investigated. Cten expression was manipulated in different cell lines using multiple approaches including forced expression, gene knockdown and constitutive depletion (through Crispr/Cas9 gene deletion) to eliminate artefacts of methodology and cell line specific effects. Snail, Src and ROCK1 were identified as novel downstream targets of Cten signalling and additionally, Cten was shown to increase the stabilisation of both Src and Snail proteins. The functional relevance of Cten-Snail, Cten-Src and Cten-ROCK1 signalling was assessed, and the overall findings demonstrated that Cten could promote cell motility and colony formation directly through the positive regulation of the Src/ROCK1/Snail dependent axis. To gain a deeper insight into the mechanisms of Cten’s biological function, mutations, at two important residues (i.e. arginine 474 and tyrosine 479) in the Src homology 2 (SH2) domain of Cten were introduced into one construct (GFP-CtenR474A+Y479F) using site directed mutagenesis. These two residues in the SH2 domain of Cten were found to not only be important for interacting with Src, ROCK1, or Snail signalling, but also for regulating cell motility and colony formation efficiency. Numerous Cten regulatory factors have been identified, however, little is known about how Cten is activated and regulated in cancer cells. The relationship between transforming growth factor beta 1 (TGFβ1) and Cten was investigated and stimulation of cells with TGFβ1 or knockdown of TGFβ1 resulted in changes in Cten expression as well as its downstream targets of ROCK1, Src, Snail, and N-cadherin. Furthermore, this positive interaction between TGFβ1 and Cten was functionally relevant and caused changes in cell motility. and the nuclear translocation of ROCK1, Src, and Snail protein increased by TGFβ1 is probably mediated via upregulation of the Cten signalling pathway The biological function of Cten in the nucleus was further investigated and shown to increase nuclear localisation of Src, ROCK1, and Snail, further promoting the migratory capability and colony formation efficiency in CRC cells. Finally, Cten expression was shown to positively correlate with both ROCK1 and Src expression in a series of primary CRCs. This correlation was consistent with that observed following manipulation of Cten expression in CRC cell lines. In conclusion, this study has revealed a number of novel findings regarding the biological function of Cten signalling in CRC. However, further validation of the findings may enhance the understanding of the role of Cten in the invasion-metastasis cascade in the future.
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GERMANO, SERGIO BRAGANTINE. „METROLOGICAL RELIABILITY OF THE DYNAMOMETRIC BENCH FOR ENGINE TESTING OF CTEX“. PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2013. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=23215@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO
INSTITUTO MILITAR DE ENGENHARIA
CENTRO TECNOLÓGICO DO EXÉRCITO
Nesta dissertação buscou-se avaliar metrologicamente um banco de ensaios dinamométricos específico, utilizado para analisar a eficiência de motores, lubrificantes e combustíveis, por meio de métodos de comparação dos valores medidos com valores padrões. As grandezas mensuradas foram: velocidade de rotação do eixo de um motor, torque neste eixo, temperaturas e pressões no motor e no dinamômetro, elemento que atua como freio do motor para proporcionar uma simulação das condições reais de trabalho. Foi necessário utilizar dois métodos distintos para avaliação de cada uma das grandezas mensuradas. Foram mensuradas velocidades do motor funcionando e velocidades simuladas, tanto inferiores como superiores às velocidades de operação do motor, determinando os limites superior e inferior de resposta do sistema de medição. Para avaliar a medição de torque, foram produzidos torques conhecidos (padrão), correlacionados com torques medidos no motor funcionando. Temperaturas foram produzidas por um banho termostático, mensuradas com equipamentos calibrados e em seguida comparadas com as indicadas pelo sistema de medição, sendo também utilizado um método simulador de informações de temperaturas, chegando a ser simuladas de -200 graus Celsius a 650 graus Celsius. Pressões foram geradas por uma bomba de pressão padrão e lidas pelo sistema de medição, sendo detectado funcionamento inapropriado de 2 canais. Os resultados de cada grandeza foram tratados estatisticamente sendo validadas suas utilizações nos cálculos executados. Confirmadas estatisticamente as validades dos resultados, as incertezas de medição foram calculadas, sendo utilizadas também informações dos certificados de calibração dos equipamentos usados nas medições realizadas. Sugestões foram apresentadas para que melhoria sejam incrementadas ao sistema de medição que demonstrou estar funcionando de forma satisfatória, apresentando, no entanto, algumas oportunidades de melhorias.
This work intended to evaluate, metrologically, a specific bench of dynamometric tests, used to analyze the efficiency of engines, lubricants and fuels, through methods that compare the measured values with standards. The measured quantities were: rotation speed of the engine shaft, torque on this same shaft, temperature and pressure of both engine and dynamometer, element that acts as the engine brake so it can simulate a real work condition. It was necessary to use two different methods to evaluate each measured quantity. It was measured the working engine speed and simulated speeds, both higher and lower than the engine operating speeds, establishing the higher and the lower limits of the measurement system. To evaluate the torque measurement, known torques (standards), were produced, and related to the measured torques in the working engine. Temperatures were produced by a thermal bath, measured with calibrated equipment, and then compared with the temperatures indicated by the measuring system, being also used a simulated method for temperatures information, with a range of simulation between -200 Celsius degrees and 650 Celsius degrees. The pressures were created by a standard pressure pump and read by the measuring system, being detected an inappropriate operation of 2 channels. The results were treated statistically, being validated the utilizations on the executed calculations. Having been statistically confirmed the validity of the results, the measurement uncertainties were calculated, being also used the information from the equipment calibration certificate. Suggestions were presented so that improvemenst can be made to the Measuring System.
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FOULON, THIERRY. „Etude du contenu genetique d'un virus herpes du lapin cottontail (cthv)“. Paris 7, 1990. http://www.theses.fr/1990PA077035.

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Le virus herpetique du lapin sauvage americain, (cthv) possede un genome compose de 2 segments de sequences uniques, encadres par des blocs de repetitions en tandem, le bloc central de repetitions est en orientation inverse par rapport a ceux des extremites. Le cthv est range dans la sous-famille des gamma-herpesvirinae. Les sequences repetees terminales et centrales jouent un role important dans le processus de decoupage et d'encapsidation de l'adn viral. Dans une premiere partie de ce travail, nous avons realise une etude preliminaire des interactions adn-proteines dans ces regions repetees. Dans une seconde partie, nous nous sommes interesses au contenu genetique du cthv, et nous avons localise dans le genome, deux phases ouvertes de lecture dont les produits de traduction sont homologues a deux proteines codees par le genome du virus ebv, une proteine ayant une affinite pour l'adn simple brin et une helicase. La comparaison des sequences en acides amines, nous a permis de definir un motif parfaitement conserve dans les sequences des proteines helicases herpetiques, et 2 motifs conserves dans les sequences des proteines majeures dbp des virus cthv, ebv, hsv1 et vzv. Sur la base d'homologies de sequences, nous emettons l'hypothese que le genome du cthv code pour, une ou des proteines, homologues aux antigenes nucleaires du virus d'epstein-barr. Et enfin nous avons determine l'existence, a l'interieur du genome viral, de 3 regions d'homologie avec l'adn cellulaire dont une contient des sequences homologues aux repetitions de type c appartenant a la famille des sequences sines. Nous avons egalement presente sous forme d'annexe, le resume d'un travail realise sur le virus de la pseudorage, en collaboration avec un laboratoire du centre national d'etudes veterinaires et alimentaires
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Read, David Alan. „Overcoming bias in Citrus tristeza virus (CTV) genotype detection and a population study of CTV within Southern African Star Ruby grapefruit orchards“. Thesis, University of Pretoria, 2015. http://hdl.handle.net/2263/53554.

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Citrus tristeza virus (CTV) is present in almost all of the major citrus production areas where it continues to reduce the profitability of citriculture worldwide. Severe stem-pitting strains are endemic to Southern Africa. In addition to making use of decline-tolerant rootstocks, the implementation of a mild-strain cross-protection program has sought to increase the citrus production in the region. Of all the commercially cultivated citrus species, grapefruit cultivars are among the most susceptible to the severe stem-pitting strains and infections often lead to a breakdown of cross-protection. Recent research has shown that CTV crossprotection operates through a strain-specific mechanism, which relies on a virusspecific protein, expressed from the p33 gene. The specificity of this mechanism has highlighted the need for determining the CTV diversity within production areas as well as accurately characterising CTV cross-protection sources that will be capable of preventing secondary inoculations of severe strains in the field. The accurate characterisation of CTV populations, which are usually made up of a number of disparate strains, requires the use of robust PCR protocols. Mismatches between primers and their corresponding binding sites may introduce primer-associated bias during amplification. The primer-associated bias of four sets of CTV specific primers, targeting the A and F regions and the p23 and p33 genes, were evaluated. This was done through the amplification of defined templates followed by their characterisation using the sequencing of multiple clones, as well as Illumina next generation sequencing. High levels of bias were found to be associated with the primer pairs targeting the A and F regions. The p33 gene primers were found to be biased against two genotypes and suggestions for preventing this apparent bias are discussed. The primer pair targeting the conserved p23 gene was found to have very little associated bias. The second major aspect of this study was the large scale survey of CTV diversity of pre-immunised Star Ruby grapefruit orchards in Southern Africa. Samples were collected from eight Star Ruby production sites throughout Southern Africa, namely Hoedspruit 1, Hoedspruit 2, Malelane 1, Malelane 2, Swaziland (Mananga), Northern Cape (Kakamas), Sundays River Valley and Nkwalini Valley, where between 16 and 32 samples per site were collected. The p33 gene was amplified for each of the collected samples and subjected to direct Sanger sequencing. A protocol making use of Illumina MiSeq sequencing was established and used to sequence 96 samples. A subset of six samples was selected for cloning, which resulted in a total of 218 sequenced clones and compared with that of the Illumina sequencing data. High levels of CTV diversity were observed between orchards, as well as between different trees within the same orchard. Most of the populations were made up of a single dominant group, sometimes with several minor sequence types. Sequence reads corresponding to strains within the Resistance Breaking (RB) genotype were most numerous, especially in the most recently planted orchards and were present within all of the populations analysed. The Kpg3/SP/T3 group appeared to be represented the second most prevalent genotype and seems to become more common as the orchard ages. Genotypes of the HA 16- 5, VT, AT-1, T36, Taiwan-Pum/M/T5 and T30 types, were represented sporadically and at variable levels in populations from numerous collection sites. This has been one of the most extensive diversity studies of CTV to date and has provided unprecedented baseline knowledge of CTV diversity in Southern Africa.
Thesis (PhD)--University of Pretoria, 2015.
Microbiology and Plant Pathology
PhD
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Bücher zum Thema "CTEV"

1

Hovanessian, Diana Der. Sele cted poems. Riverdale-on-Hudson, N.Y: Sheep Meadow Press, 1994.

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CTEL Exam Secrets Test Prep Team. CTEL exam secrets study guide. S.I: Morrision Media LLC, 2008.

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Montana. Dept. of Transportation. CTEP: Community Transportation Enhancement Program. Helena, MT: Montana Department of Transportation, 2000.

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Georgina, Rossetti Christina. Sele cted poems of Christina Rossetti. Ware: Wordsworth Poetry Library, 1995.

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Golden, Charles J., und Matthew R. Zusman. Chronic Traumatic Encephalopathy (CTE). Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-23288-7.

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Gittins, Susan. CTV: The television wars. North York, Ont: Stoddart, 1999.

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Michael, Nolan. CTV, the network that means business. Edmonton: University of Alberta Press, 2001.

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Confederación de Trabajadores de Venezuela. CTV, 50 años de historia, 1936-1986. [Caracas?]: Confederación de Trabajadores de Venezuela, 1986.

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Québec), Paroisse Saint-Eugène (Salaberry-de-Valleyfield. Mariages de la paroisse Saint-Eugène, Salaberry-de-Valleyfield, Cté. Beauharnois, 1946-1990. Salaberry-de-Valleyfield, Québec: Société d'histoire et de généalogie de Salaberry, 1999.

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Leger, Jean-Marie. Répertoire des mariages de la Paroisse Saint Jean-Chrysostome, Cté. Châteauguay: 1838-1987. Valleyfield, QC: P.-E. Prégent, 1987.

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Buchteile zum Thema "CTEV"

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Simons, George W. „Etiological Theories of CTEV“. In The Clubfoot, 2. New York, NY: Springer New York, 1994. http://dx.doi.org/10.1007/978-1-4613-9269-9_1.

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Stevens, D., und S. Meyer. „CTEV Equinus Severity Grading Scale“. In The Clubfoot, 98–102. New York, NY: Springer New York, 1994. http://dx.doi.org/10.1007/978-1-4613-9269-9_21.

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Stevens, D., und S. Meyer. „Intraoperative X-Ray as a Standard for Accuracy of Correction by Posteromedial Release of CTEV“. In The Clubfoot, 156–59. New York, NY: Springer New York, 1994. http://dx.doi.org/10.1007/978-1-4613-9269-9_31.

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Tamma, Vincenzo, Heyi Zhang, Xuehua He, Augusto Garuccio und Yanhua Shih. „CTES Factorization Algorithm“. In Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 303–10. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-11731-2_37.

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Golden, Charles J., und Matthew R. Zusman. „Prologue and Introduction to CTE and Aggression“. In Chronic Traumatic Encephalopathy (CTE), 1–10. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-23288-7_1.

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Golden, Charles J., und Matthew R. Zusman. „Clinical Manifestations of CTE: Disruptions in Cognition, Mood, & Behavior“. In Chronic Traumatic Encephalopathy (CTE), 11–38. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-23288-7_2.

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Golden, Charles J., und Matthew R. Zusman. „Comprehensive Evaluation of Possible CTE Cases“. In Chronic Traumatic Encephalopathy (CTE), 39–49. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-23288-7_3.

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Golden, Charles J., und Matthew R. Zusman. „Clinical Implications and Conclusions“. In Chronic Traumatic Encephalopathy (CTE), 51–59. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-23288-7_4.

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Kim, Denise S., Remy R. Lobo und Alon Kahana. „Orbital CTA/CTV“. In Atlas of Orbital Imaging, 1–4. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-41927-1_86-1.

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Haigh, Sarah J., und Angus I. Kirkland. „Aberration-Corrected Imaging in CTEM“. In Aberration-Corrected Analytical Transmission Electron Microscopy, 241–61. Chichester, UK: John Wiley & Sons, Ltd, 2011. http://dx.doi.org/10.1002/9781119978848.ch9.

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Konferenzberichte zum Thema "CTEV"

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Suisan, Yohan Christian, und S. M. Mei Wulan. „The Role of Comprehensive Rehabilitation Management in Spina Bifida Patient with CTEV: A Case Report“. In International Meeting on Regenerative Medicine. SCITEPRESS - Science and Technology Publications, 2017. http://dx.doi.org/10.5220/0007317901590162.

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Silverman, Rochelle E., und Edwin A. Peraza Hernandez. „Designing Lightweight Tensegrity-Based Structures and Materials of Tailorable Thermal Expansion“. In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-97304.

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Abstract In this work, we analyze and design structures and materials that possess custom thermal expansion. These structures and materials are composed of a base unit inspired by the tensegrity “D-bar” (or double-pyramid) topology. We derive, for the first time, analytical equations for the linearized and geometrically exact coefficients of thermal expansion (CTEs) of bi-material D-bar structures with arbitrary shape and complexity. Numerical results obtained using the geometrically exact CTE equations are compared with results obtained using the linearized CTE equations, showing that the latter are accurate only in cases where temperature changes are small. Further results show that D-bar structures of low complexity can produce a wide range of CTEs, including positive, zero, and negative values. These CTE values are exhibited for a range of materials that allows for easy manufacturing (materials with CTE ratios as low as 2). Thus, it is concluded that D-bar structures show promise for applications in aerospace engineering and other fields where new materials of tailorable thermal expansion are needed to decrease the substantial thermal stresses caused by large temperature changes.
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Eichmann, Philipp, Hyunchang Song und Emanuel Zgraggen. „cTed“. In CHI'16: CHI Conference on Human Factors in Computing Systems. New York, NY, USA: ACM, 2016. http://dx.doi.org/10.1145/2851581.2892553.

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Cunningham, William J., Dick Casali und Norman J. Armendariz. „Materials Characterization and Model of PCB Thermal Expansion for Laminates With Various Copper Densities and Thicknesses“. In ISTFA 2004. ASM International, 2004. http://dx.doi.org/10.31399/asm.cp.istfa2004p0441.

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Abstract The SEMATECH/SEMI roadmap forecasts increased density requirements for printed circuit board manufacturing to accommodate smaller form factor interconnects, increased pin counts, and routing densities on a range of PCB sizes and thicknesses. As a result, the effect of materials. thermal expansion properties may further impact the structural or physical integrity and subsequent electrical properties for high speed and thermal management requirements. This study demonstrated that various sample coupons selected from PCB boards with different amounts of copper showed a corresponding coefficient of thermal expansion (CTE) correlation in the Z-axis (CTEZ) and can be modeled using a constitutive equation. Moreover, samples were further evaluated from the effect of increasing temperature and showed that the CTE indeed affects copper-interconnect physical structures such as copper vias and barrels in terms of elongation or strain.
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Xie, Yan, Dengfeng Lu und Jingjun Yu. „Bimaterial Micro-Structured Annulus With Zero Thermal Expansion Coefficient“. In ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/detc2017-68142.

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This paper mainly concentrates on the design and analysis of the annulus with zero thermal expansion coefficient (ZTE) aiming to solve the heat generation and deformation in high speed bearing. First, a fork-like lattice cell inspired by the basic triangular cell is put forward and further applied to construct an annulus. The stretch-dominated lattice cell utilizes the Poisson’s contraction effect to achieve the tailorable thermal expansion coefficient (CTE). The thermal behaviors differences between the continuous interfaces and lattice cells will lead to the internal stress. Thus, the CTE of the annulus consisting of the lattice cell can be tailored to zero even negative values through the offset between the thermal-strain and force-strain. Then a theoretical model is established with some appropriate assumptions to reveal the quantitative relations among the geometrical parameters, material properties and equivalent CTEs thoroughly. The prerequisites for realizing a zero CTE are further derived in terms of material limitations and geometric constraints. Finally, FEA method is implemented to verify and analyze the thermal behaviors of annulus. The proposed annulus design characterized by the CTE tunability, structure efficiency and continuous interfaces is hopefully to be applied in the high speed bearings, adapters between the shaft and collar and fastener screws.
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Mori, Hiroyuki, Sayuri Kohara, Keishi Okamoto, Hirokazu Noma und Kazushige Toriyama. „Effects of Low CTE Materials on Thermal Deformation of Organic Substrates in Flip Chip Package Application“. In ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems collocated with the ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ipack2015-48741.

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Coefficient of thermal expansion (CTE) characteristic of organic materials for substrates in flip chip package application demanded by semiconductor package requirements is becoming lower than ever. In general, height restrictions are imposed on package-on-package (PoP) devices in mobile applications. One should hence establish a tight budget on the height variation in manufacturing of the devices. Given such background, a lowering of the CTE characteristic of package substrates is an attractive solution for reducing package deformation upon manufacturing, since it contributes to minimize CTE mismatch of the substrates with silicon chips. In large-die flip chip applications such as high-end processors, a lower CTE substrate can mitigate mechanical stress not only on low-k layers in back end of the line (BEOL) underneath the chip bumps, but also on underfill layers during thermal cycling. Therefore an introduction of lower CTE materials in organic substrates is becoming essential for future applications of electronic devices. In this paper, thermal deformation behaviors of organic substrates associated with lowering of the CTEs of their constituent materials are analyzed by finite element analysis (FEA). The analyses are done on a 3-2-3 build-up layer structure substrate in order to focus onto typical application specific integrated circuit (ASIC) products. A finite element model for a test substrate is constructed by a method in which the substrate is divided into sections according to its circuitry patterns so that the lateral inhomogeneity of mechanical property is taken into account. The finite element analyses using the model showed that the package warpage decreases with lowering of the effective CTE of the substrate, but the warpage of the substrate itself increases and its surface profile changes from a concave shape to a convex shape. The analysis result of substrate warpage variation with the build-up material’s CTE showed that the selection of build-up materials with appropriate material properties can contribute to reduce the substrate warpage. The analysis also showed that the adverse impact to the substrate’s CTE reduction by such material selection is limited.
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Zhang, Baobao, Jun Bi, Jianping Wu und Fred Baker. „CTE“. In SIGCOMM'14: ACM SIGCOMM 2014 Conference. New York, NY, USA: ACM, 2014. http://dx.doi.org/10.1145/2619239.2631438.

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Baldwin, Drake D., und Edwin A. Peraza Hernandez. „Design of Tensegrity-Based Lattices With Engineered Load-Bearing and Thermal Expansion Properties“. In ASME 2020 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/detc2020-22705.

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Abstract Tensegrity lattices are networks of axially loaded members designed to efficiently use material and exhibit properties such as minimum mass load-carrying or energy absorption capabilities. This work entails the modeling and design of tensegrity “D-bar” lattices with specified orthotropic compressive strength. The objectives for the design of the lattices include minimum mass density and minimum error between the orthotropic coefficients of thermal expansion (CTEs) of the lattice and given target values. The studied D-bar structures are formed by joining two equal pyramids base-to-base where tensile strings form the edges of the pyramid bases and compressive bars form the remaining edges. Orthorhombic lattices having D-bars as their edges are designed to support compressive forces and exhibit positive, zero, or negative CTE values along their three principal directions. It is investigated how the geometry of the individual D-bar components may be adjusted, for the given compressive strength, to prevent local yielding and buckling failure with the minimum required material. Analytical formulas for the minimum density and the CTE of the D-bar lattices are provided, and a numerical framework for the integration of these formulas along with size and topological constraints is developed. Design trade-offs between minimum lattice density and minimum error from the target CTE, which are found to be competing structural performance metrics, are visualized and investigated.
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Ahari, Ali, Jan Novacek, Alexander Viehl, Oliver Bringmann und Wolfgang Rosenstiel. „CTEF: Collaborative Technology Evaluation Framework“. In 2018 IEEE International Systems Engineering Symposium (ISSE). IEEE, 2018. http://dx.doi.org/10.1109/syseng.2018.8544418.

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10

Potylitsyn, N. P., A. V. Britkov, Y. A. Krasyuk, N. A. Gorbanov und V. V. Zayanchukovskiy. „CTV optical equipment“. In 2005 15th International Crimean Conference Microwave and Telecommunication Technology. IEEE, 2005. http://dx.doi.org/10.1109/crmico.2005.1564825.

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Berichte der Organisationen zum Thema "CTEV"

1

Estep, R. Integration of TGS and CTEN assays using the CTEN{_}FIT analysis and databasing program. Office of Scientific and Technical Information (OSTI), Mai 2000. http://dx.doi.org/10.2172/768971.

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2

Han, Tao. Closeout Report for CTEQ Summer School 2017. Office of Scientific and Technical Information (OSTI), Juli 2017. http://dx.doi.org/10.2172/1477879.

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3

Han, Tao. Closeout Report for CTEQ Summer School 2015. Office of Scientific and Technical Information (OSTI), Mai 2016. http://dx.doi.org/10.2172/1410655.

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4

Allen, Nicholas Charles. CTE Measurements for Loading Scenarios. Office of Scientific and Technical Information (OSTI), April 2016. http://dx.doi.org/10.2172/1248133.

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5

Carroll, David K., und Jr. Heavy Assault Bridge. Cost and Training Effectiveness (CTEA). Fort Belvoir, VA: Defense Technical Information Center, August 1995. http://dx.doi.org/10.21236/ada311901.

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6

Rosen, Melvin B., Doris C. Berger und Richard K. Matlick. A Review of Models for Cost and Training Effectiveness Analysis (CTEA). Fort Belvoir, VA: Defense Technical Information Center, März 1985. http://dx.doi.org/10.21236/ada158041.

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7

Mandelbaum, Jay. Identifying and Assessing Life-Cycle-Related Critical Technology Elements (CTEs) for Technology Readiness Assessments (TRAs). Fort Belvoir, VA: Defense Technical Information Center, November 2006. http://dx.doi.org/10.21236/ada465212.

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8

Botero-Ospina, María-Helena, Juan Camilo Marenco Otero und Alejandro Cortés Prieto. La innovación tecnológica como fenómeno territorial: implementación de CTeI a través de los recursos de regalías. Universidad del Rosario, 2021. http://dx.doi.org/10.12804/issne.2745-2085_10336.32135_feipu.

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9

Lanfranfo, Giobatta, und James Fast. Displacements and stress distribution in D0 Run IIb stave due to CTE mismatches. Office of Scientific and Technical Information (OSTI), Juli 2001. http://dx.doi.org/10.2172/15011729.

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10

Lanfranco, Giobatta, James Fast und /Fermilab. Displacements and stress distribution in D0 Run IIb stave due to CTE mismatches. Office of Scientific and Technical Information (OSTI), Juli 2001. http://dx.doi.org/10.2172/15017254.

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