Nouvelles méthodes de lutte

in Revue de l'Agriculture (1992), Hors série

An Upward Compatible Timed Extension to LOTOS

in Parther, Ken; Rose, Gordon (Eds.) Formal Description Techniques IV (1992)

We propose a timed extension of LOTOS, denoted TLOTOS, which is upward compatible with the standard LOTOS. It means first that a timed behaviour expression which does not use any language extension will ... [more ▼]

We propose a timed extension of LOTOS, denoted TLOTOS, which is upward compatible with the standard LOTOS. It means first that a timed behaviour expression which does not use any language extension will have the same semantics as in standard LOTOS. In addition, we have pushed this upward compatibility one step beyond by requiring and obtaining that all the familiar equivalence laws of standard LOTOS be preserved e.g. B [] B approximately B, B [] stop approximately B. This is needed in order to keep the intuition of a standard LOTOS user unchanged. TLOTOS has been mainly inspired by other approaches such as Moller Tofts's TCCS (Temporal CCS), Hennessy Regan's TPL (Temporal Process Language) and Nicollin Sifakis's ATP (Algebra of Timed Processes). Our model is not strictly asynchronous (like standard LOTOS, CCS, CSP, ACP) nor strictly synchronous (like SCCS, CIRCAL, Meije). For compatibility and simplicity, we decided to keep the model asynchronous for a large part and, for dealing with time, to introduce a `'synchronous part'' by way of a new basic `'synchronous'' or timed action in the asynchronous semantic model. The design of our TLOTOS is presented together with other possible design alternatives which are all rejected according to our compatibility or expressive power requirements. The solution that we obtain is simple and satifactory, and its operational semantics is presented in depth. Two examples are provided to illustrate the use of TLOTOS. [less ▲]

Anatomical Rationale for Use of the Latissimus Dorsi Flap During the Cardiomyoplasty Operation

in Surgical & Radiologic Anatomy [=SRA] (1992), 14(1), 5-10

The cardiomyoplasty procedure involves the use of a transformed skeletal muscle to augment cardiac pump function or to substitute for the heart after parietal resection. This study of the intramuscular ... [more ▼]

The cardiomyoplasty procedure involves the use of a transformed skeletal muscle to augment cardiac pump function or to substitute for the heart after parietal resection. This study of the intramuscular vascularization of latissimus dorsi was carried out in order to establish the relationship between the dominant thoracodorsal blood supply and the distal supply issued from the intercostal and lumbar arteries. This data is mandatory for the safe manipulation of the muscle flap during cardiomyoplasty. Thirty human latissimus dorsi flaps were carefully studied. We confirmed anatomically as well as angiographically previous macroscopic anatomical reports, as well as the constancy of the neurovascular pedicle. Three principal branching patterns were observed for the thoracodorsal artery. The thoracodorsal artery divides into three main tributaries in 20/30 (67%), and into two tributaries in 10/30 (33%) of the flaps observed. When three tributaries were observed, one of them was a small recurrent artery for the proximal third of the latissimus dorsi (14/20, 70%). Thus the distal vascularization is actually dependent on three principals in 6/30 (20%) and two principals in 24/30 (80%). From these two or three principals emerge several subsequent longitudinal branches (5 to 9) that have a straight course until their distal anastomoses with segmental arterial pedicles issued from intercostal and lumbar arteries. The latter ligation can thus occur without ischemic damage to the medial and distal aspect of the flap. This study emphasizes that, due to macroscopic anatomic features and systematic intramuscular vascular distribution, the latissimus dorsi is probably the most suitable muscle for the purpose of cardiomyoplasty. [less ▲]

L’avenir du livre : morts et transfigurations

in Guide des médias (1992)

A quasi-Newton algorithm for first-odrer saddle-point location

in Theoretica Chimica Acta (1992), 82

A new algorithm for the location of a transition-state structure on an energy hypersurface is proposed. The method is compared to three other quasi-Newton step calculations available in literature ... [more ▼]

A new algorithm for the location of a transition-state structure on an energy hypersurface is proposed. The method is compared to three other quasi-Newton step calculations available in literature. Numerical results derived from several examples are compared to those obtained by the two algorithms implemented in the Gaussian package. [less ▲]

Aneurysm of the Ascending Aorta after Cardiac Transplantation

in Annals of Thoracic Surgery (1992), 54(5), 983-4

We report the case of a 57-year-old female cardiac transplant patient in whom an aneurysm of the recipient side of the ascending aorta developed 1 year after transplantation. Although a mycotic origin was ... [more ▼]

We report the case of a 57-year-old female cardiac transplant patient in whom an aneurysm of the recipient side of the ascending aorta developed 1 year after transplantation. Although a mycotic origin was the likely cause, histologic examination diagnosed an atherosclerotic aneurysm. [less ▲]

Construction d'une table de production pour le Douglas (Pseudotsuga menziesii (Mirb.) Franco) en Belgique

in Bulletin des Recherches Agronomiques de Gembloux (1992), 27(3), 327-347

A yield table was compiled for even-aged pure stands of Douglas fir (Pseudotsuga menziesii (MIRBK) FRANCO) in Belgium. It reflects the probable development of normal fully stocked stands under the ... [more ▼]

A yield table was compiled for even-aged pure stands of Douglas fir (Pseudotsuga menziesii (MIRBK) FRANCO) in Belgium. It reflects the probable development of normal fully stocked stands under the silviculture at the time of the data collection. The data were collected from 256 temporary sample plots, 87 of which were remeasured 2 or 3 times. A family of functions (the JOHNSON-SCHUMACHER model) was used to develop a site classification system based on the top height at age 50). The standing crop characteristics (number of trees, volume, basal area, mean stem basal area), calculated as a function of age and site index, are derived from stem girth distribution fitted by means of the WEIBULL function. Concerning the increments and the thinnings, the corresponding values were calculated from individual tree girth increments (from borings) and from comparison between stem distributions at the beginning and at the end of a period corresponding to a thinning cycle. The table is the basis on which a set of variable density yield tables will be prepared. The yield of Douglas fir trees in Belgium is also compared with the yield observed in neighbouring European countries. [less ▲]

Effects Of Commercial Fatty-Acids On Cutinase Release By Ascochyta-Pisi

in Journal of Phytopathology-Phytopathologische Zeitschrift (1992), 136(3),

Observation du comportement des participants et des éducateurs sportifs dans le cadre d’activités parascolaires, organisées pour des enfants de 8 à 10 ans

in Revue de l'Education Physique (1992), 32(4), 189-197

Le livre blanc sur la condition physique des jeunes en Belgique (Piéron & Vrijens, 1991) a attiré l'attention sur l'existence d'un déficit d'activité motrice dans les premières tranches d'âges de la ... [more ▼]

Le livre blanc sur la condition physique des jeunes en Belgique (Piéron & Vrijens, 1991) a attiré l'attention sur l'existence d'un déficit d'activité motrice dans les premières tranches d'âges de la population de notre pays. Afin d'en limiter les effets néfastes, il est opportun que la communauté éducative offre aux enfants plus de possibilités d'engagement dans des programmes d'éducation physique et motrice. ... [less ▲]

Laissez les dormir en paix !

Learning material (1992)