An Alternative Interpretation of Recent ARPES Measurements on TiSe2

Recently there has been a renewed interest in the charge density wave transition of TiSe2, fuelled by the possibility that this transition may be driven by the formation of an excitonic insulator or even an excitonic condensate. We show here that the recent ARPES measurements on TiSe2 can also be interpreted in terms of an alternative scenario, in which the transition is due to a combination of Jahn-Teller effects and exciton formation. The hybrid exciton-phonons which cause the CDW formation interpolate between a purely structural and a purely electronic type of transition. Above the transition temperature, the electron-phonon coupling becomes ineffective but a finite mean-field density of excitons remains and gives rise to the observed diffuse ARPES signals.Comment: 4 pages, 2 figure

Pressure induced electronic and structural phase evolution in Van der Waals compound FePS3_3

Two-dimensional materials have proven to be a prolific breeding ground of new and unstudied forms of magnetism and unusual metallic states, particularly when tuned between their insulating and metallic phases. In this paper we present work on a new metal to insulator transition system FePS3 . This compound is a two-dimensional van-der-Waals antiferromagnetic Mott insulator. Here we report the discovery of an insulator-metal transition in FePS3, as evidenced by x-ray diffraction and electrical transport measurements, using high pressure as a tuning parameter. Two structural phase transitions are observed in the x-ray diffraction data as a function of pressure and resistivity measurements show evidence of the onset of a metallic state at high pressures. We propose models for the two new structures that can successfully explain the x-ray diffraction patterns

Incisional hernia after upper abdominal surgery: A randomised controlled trial of midline versus transverse incision

Objectives: To determine whether a transverse incision is an alternative to a midline incision in terms of incisional hern

Sternal plate fixation for sternal wound reconstruction: initial experience (Retrospective study)

<p>Abstract</p> <p>Background</p> <p>Median sternotomy infection and bony nonunion are two commonly described complications which occur in 0.4 - 5.1% of cardiac procedures. Although relatively infrequent, these complications can lead to significant morbidity and mortality. The aim of this retrospective study is to evaluate the initial experience of a transverse plate fixation system following wound complications associated with sternal dehiscence with or without infection following cardiac surgery.</p> <p>Methods</p> <p>A retrospective chart review of 40 consecutive patients who required sternal wound reconstruction post sternotomy was performed. Soft tissue debridement with removal of all compromised tissue was performed. Sternal debridement was carried using ronguers to healthy bleeding bone. All patients underwent sternal fixation using three rib plates combined with a single manubrial plate (Titanium Sternal Fixation System^®, Synthes). Incisions were closed in a layered fashion with the pectoral muscles being advanced to the midline. Data were expressed as mean ± SD, Median (range) or number (%). Statistical analyses were made by using Excel 2003 for Windows (Microsoft, Redmond, WA, USA).</p> <p>Results</p> <p>There were 40 consecutive patients, 31 males and 9 females. Twenty two patients (55%) were diagnosed with sternal dehiscence alone and 18 patients (45%) with associated wound discharge. Thirty eight patients went on to heal their wounds. Two patients developed recurrent wound infection and required VAC therapy. Both were immunocompromised. Median post-op ICU stay was one day with the median hospital stay of 18 days after plating.</p> <p>Conclusion</p> <p>Sternal plating appears to be an effective option for the treatment of sternal wound dehiscence associated with sternal instability. Long-term follow-up and further larger studies are needed to address the indications, benefits and complications of sternal plating.</p

United States Bureau of Mines Information Circular 8055

Report issued by the U.S. Bureau of Mines discussing iron and steel reserves in India. Description of the country's iron and steel industry is presented. This report includes maps, tables, illustrations, and photographs

Styles cognitifs, langue chinoise et apprentissage des mathématiques et de la statistique : etude exploratoire dans le contexte de l'enseignement secondaire en Chine

In this research study, we will explore the learning characteristics of students of different cognitive styles of secondary education in China. Several studies, including our latest research, have highlighted the fact that students of different cognitive styles have manifested different learning characteristics. In our previous work, we noted that mathematical knowledge is essential for the learning of statistic. Meanwhile, Chinese students off different studies showed different cognitive styles. Moreover, some studies have shown the characteristics of generalization in Chinese student learning process which refers to the characteristics of Chinese language learning. Since all Chinese students do not study in the same context and the development of cognitive styles are closely linked to socio-cultural adaptation, we are interested in the relationships between the three elements that are respectively the cultural context, mathematics learning and cognitive styles. Thus, as a continuation study, this thesis focuses on the mathematics learning characteristics of the Chinese high school students of different campus and different cognitive styles.In this thesis, we aim firstly to validate the results that are revealed by different researches of different cultural contexts. Secondly, as the selection of students of each campus is based on the national competitions that play a key role in determining the school context, we are specifically interested in the field dependence-independence cognitive style as well as the reflexivity-impulsivity cognitive style as the characteristics of the two types of cognitive style are, theoretically, closely related to the competition context. We will explore the links between student selection and different cognitive styles. We will also see the relationship between the field dependent-independent cognitive style and the reflexivity-impulsivity cognitive style. Eventually, we will present the different mathematics learning characteristics of students of different cognitive styles and different school campus.Dans cette étude de recherche, nous allons explorer les caractéristiques d’apprentissage des élèves de différents styles cognitifs de l’enseignement secondaire en Chine. Plusieurs études, y compris notre dernière recherche, ont mis en avant le fait que les étudiants universitaires des différents styles cognitifs ont manifesté différentes caractéristiques d’apprentissage. Dans notre travail précédent, nous avons constaté que les connaissances mathématiques sont essentielles pour l’apprentissage de la statistique. En même temps, les étudiants chinois des différents parcours d’étude ont manifesté différents styles cognitifs. De plus, certaines études ont montré les caractéristiques de la généralisation dans l’apprentissage des élèves chinois qui renvoie aux caractéristiques de l’apprentissage de la langue chinoise. Comme tous les étudiants chinois ne font pas leurs études dans le même contexte scolaire et le développement des styles cognitifs sont étroitement lié l’adaptation socioculturelle, nous nous somme intéressé aux relations entre les trois éléments qui sont respectivement le contexte culturel, les caractéristiques d’apprentissage et les styles cognitifs. Ainsi, en tant qu’une étude de continuation, cette thèse se concentre sur les caractéristiques d’apprentissage des mathématiques des lycéens chinois des différents établissements et des différents styles cognitifs. A travers cette thèse, nous visons dans un premier temps à valider des résultats qui sont mis au jour par différentes études recherches de différents contextes culturels. Ensuite, comme la sélection des élèves de chaque établissement est basée sur les concours nationaux qui joue un rôle essentiel à déterminer le contexte scolaire, nous nous intéressons spécifiquement aux styles cognitifs dépendant-indépendants à l’égard du champ et styles cognitifs réflexivité-impulsivité car les caractéristiques des deux types de style cognitif sont, à priori, étroitement lié au contexte de concours. Nous allons explorer les liens entre la sélection des élèves et différents styles cognitifs. Nous allons également voir la relation entre le style cognitif dépendant-indépendant à l’égard du champ et le style réflexivité-impulsivité. Éventuellement, nous allons présenter les différentes caractéristiques d’apprentissage des mathématiques des élèves des différents styles cognitifs et des différents établissements

United States Bureau of Mines Reports

Report issued by the U.S. Bureau of Mines discussing the development of Turkey's mineral industry. Mineral production, consumption, and trade are presented. This report includes tables, maps, illustrations, and photographs

Tensor Facia Lata-iliac crest osteocutaneous flap for orbitomaxillary reconstruction: A preliminary report

Tensor Fascia Lata muscle and musculocutaneous flap has been used in the past for reconstruction of trunk defects and also as a free flap for soft tissue reconstruction elsewhere in the body. Transferring the iliac crest along with the muscle as a free flap has been described earlier, reported for bridging calcaneal defect and small mandibular defects. The use of this flap as a source of free vascularised bone has not been widely practised since these initial few reports. Anatomical studies were carried out to assess the feasibility of using this flap for reconstructing maxillary and other head and neck defects, following which it was successfully used for these indications. The preliminary report describes the flap anatomy, method of harvest and its potential uses in head and neck reconstruction