Amsterdam, Netherlands
Amsterdam, Netherlands

Time filter

Source Type

Chaussemier M.,EPF College of Engineering | Pourmohtasham E.,EPF College of Engineering | Gelus D.,Groupe SEB | Pecoul N.,Groupe SEB | And 4 more authors.
Desalination | Year: 2015

The formation of calcium carbonate in water has some important implications in geoscience researches, ocean chemistry studies, CO2 emission issues and biology. In industry, the scaling phenomenon may cause technical problems such as reduction of heat transfer efficiency in cooling systems and obstruction of pipes.The use of chemicals which act as antiscalant is a common approach in the control of scale deposition. However, inorganic nitrogen and phosphorous compounds are involved in eutrophication process. Therefore, it is of prime importance to find alternative solutions, i.e. green inhibitors of scale formation. This last decade, several new scale inhibitors, that are more ecological compared with conventional inhibitors, have been reported in the literature. Plant extracts have been also recently used as new green antiscalants. Indeed, as they can be easily extracted and are environmentally friendly, they represent an interesting alternative source of "natural" organic molecules.In this review, a focus of some green antiscalants derived from petrochemicals has been reported. Then the efforts done those last years to obtain green inhibitors, either by using "natural" organic molecules or extracted from plants were summarized. Such green inhibitors might be used in various technical areas, i.e. energy, water, food and beverages industries. © 2014 Elsevier B.V.

Maganti S.K.,The Landing | Tzaperas S.,ARTS
19th Topical Conference on Refinery Processing 2016 - Topical Conference at the 2016 AIChE Spring Meeting and 12th Global Congress on Process Safety | Year: 2016

Process Safety Information (PSI) is a vital element of Process Safety Management (PSM) per Occupational Safety and Health Administration (OSHA) CFR 1910.119 (d). An engineer needs a variety of PSI documents for relief system evaluation, such as Process and Instrumentation Diagrams (P&IDs), Process Flow Diagrams (PFDs), Heat and Material Balances (H&MBs), relief device specification sheets, equipment specification sheets, equipment mechanical drawings, manufacturer data reports, Process Hazard Analysis (PHA) documentation, Management of Change (MOC) documentation, etc. Obtaining accurate PSI can be a daunting task for a Relief Systems Engineer. Process safety optimization can be achieved by an efficient and reliable data repository that can save valuable engineering time. Such a repository can be built by aggregating equipment information from multiple data repositories into a single point of access. This paper describes the use of a data aggregation and validation tool and outlines other PSI needs that can optimize a relief system evaluation.

Thales Alenia and Arts | Date: 2010-09-07

The invention relates to a helmet including a protective shell. The protective shell includes an upper part and a lower part extending towards the bottom of the helmet. The upper part includes a sandwich composite material including two skins, disposed on either side of a core, themselves including a plurality of composite tissue layers, The lower part includes a monolithic composite material. The invention applies in a general manner to protective helmets and more particularly in the field of aeronautics where the rigid structure allows head equipment to be fixed directly onto the protective shell.

Valeo Systemes De Controle Moteur and Arts | Date: 2014-04-08

The rotary drive system includes: a direct voltage source (102); an electric motor (104) having an axis of rotation (A), and including independent phases having directions about the axis of rotation; an inverter (106) for connecting each phase to the direct voltage source (102); and a control device (110) for supplying a command to the inverter (106). The control device includes: elements (118) for selecting a formula from predefined formulas, each predefined formula being intended to calculate either a homopolar voltage set-point, or a homopolar current set-point; elements (124) for determining a set-point intended to apply the selected formula to determine, according to the formula selected, either a homopolar voltage set-point, or a homopolar current set-point, and elements (126) for determining a command intended to determine the command of the inverter (106) based on the set-point determined.

University of Lorraine, Metz National School of Engineering, Arts, INSA Rennes and French National Center for Scientific Research | Date: 2012-11-07

According to a thermomechanical treatment process for a titanium alloy including between 23 and 27% niobium in atomic proportion, between 0 and 10% zirconium, and between 0 and 1% oxygen, nitrogen and/or silicon, the following steps are performed: a) an increase of a sample of the alloy to a temperature higher than 900 C., b) a fast quench, c) a severe cold strain, d) an ageing treatment at a temperature included between 200 and 600 C., the time of the ageing treatment being included between 10 seconds and 10 minutes. Alloy obtained by this process and prostheses made from such an alloy.

The Netherlands Pharmacovigilance Centre Lareb received two reports about patients who developed a serotonin syndrome after the combined use of trazodone and tranylcypromine. Patient A was a 60 year old man who used tranylcypromine for two years for depression. When trazodone was used once, a serotonin syndrome developed within hours. Patient B was a 68 year old man who used tranylcypromine for a psychotic depression. When trazodone was started for a sleep disorder, a serotonin syndrome developed after a day. Tranylcypromine is a non-selective monoamine oxidase (MAO) inhibitor which is indicated for depression not responding to conventional therapy. Sleep disorders are a common adverse drug reaction of tranylcypromine and are often treated (off-label) with trazodone. Trazodone is a non-selective serotonin reuptake inhibitor, officially indicated for depressive disorders with or without anxiety. The probable interaction mechanism is an additive serotonergic effect. Prescribers, pharmacists as well as patients should be aware that combining trazodone and tranylcypromine may lead to a serotonin syndrome.

The invention relates to a machine for descaling cells (3) of a cellular runoff body (2) used in an air-water exchanger, characterized in that it comprises at least one tool (6, 7) having an active tip (6a, 7a) and mounted on a frame (1) so as to be mobile between two positions in one direction common to all of the tools (6, 7) supported by the frame (1), the active tip (6a, 7a) of said tool being supported by the end of a rod (13) of a cylinder (11), the body (12) of which is mounted so as to be mobile relative to the frame (1) along the axis thereof, a piston (23) rigidly connected to the rod (13) and defining, in the body, a first chamber (26) which is constantly connected to a source of pressurized fluid and to a second chamber (27) through which the rod (13) passes, is in communication with the first chamber (26) as long as the rod (13) is at least partially retracted into the cylinder body (12) and insulated from the latter, and is connected to the exhaust when the rod (13) is in an end extension position outside the body (12).

Arts | Date: 2010-04-28

A drilling head (1) with an axial oscillation generator, includes a mounting (2) for coupling the head to a motor for rotating the mounting about an axis, the mounting (2) having a longitudinal axis (5) coinciding with the axis of rotation of the motor, a tool holder (3), an elastically deformable element (6) for retaining the tool holder (3) in the mounting (2) and an element (7) for guiding the tool holder (3) in the mounting (2) along the longitudinal axis (5) of the mounting, wherein the mounting of the drilling head includes a controlled generator (8) of reciprocating movements in the direction of the aforementioned axis (5) positioned between the mounting (2) and the tool holder, the tool holder and the generator being connected by a longitudinal coupling member (9) suitable for damping the impacts withstood by the tool holder while enabling the transmission of the reciprocating movements.

The invention relates to a device for extracting a liquid (14) contained in a container (12, 13, 15) of non-brittle material such as a container containing a liquid or pasty cosmetic or food product. The device comprises two wheels (1, 2) rotating about parallel axes (AX1, AX2) and separated from each other by a gap (E), together with motor means (3) for driving the two wheels (1, 2) in rotation in opposite directions. At least one of the wheels (1, 2) includes spikes (7, 11) projecting radially from an outer base diameter of the wheel (D1, D2) and engaging in corresponding recesses in the other wheel (1, 2; 21). The device serves simultaneously to compress and to pierce the containers (12, 13, 15) when they pass through the gap (E) between the two wheels.

PubMed | Arts and Psychiater
Type: Journal Article | Journal: Acta neuropsychiatrica | Year: 2016

Therapy-resistance for positive symptoms is one of the most important problems that occurs with the medical treatment of schizophrenia. In the past years, clozapine has proven its effectiveness in this area and has been included in the treatment protocols and guidelines. Because of the risk of agranulocytosis with this compound and the intensive laboratory controls to be done, several studies have been performed with the new antipsychotics risperidone and olanzapine as alternative treatments. A review of the literature suggests that both drugs are as effective as the classic antipsychotics for therapy-resistant patients. A switch to risperidone or olanzapine possibly would be a alternative for those patients who have favourable effects on a low dose of clozapine. Furthermore the new antipsychotics have less side effects and ameliorating effects on negative and cognitive symptoms, so contributing to overall improvement in chronic schizophrenic disorders. However, in case of persistent positive symptopathology, clozapine remains the golden standard. The new antipsychotics should be included in treatment protocols before clozapine.

Loading Arts collaborators
Loading Arts collaborators