Prawo administracyjne w mechanizmie prawa

Praca recenzowana / peer-reviewed pape

Avances tecnológicos en el proceso de tratamiento térmico de los aceros

The heat treatments have great influence on the management of the properties of alloys. For this reason the preparation of the adequate technology of the process for different kinds of pieces depends on different factors of which carefull specification createsnthe possibility of a satisfactory process.In a field of research of new technologies o fheat treatments, the project of the gyratory salt stoves is seen in its general characteristics as a great advance in this kind of process. The reasons are as follows:• The gyratory mechanism developed in the project allows an improvement in the unformity of heating of the treated pieces through their total mass.• The intensity is improved compared with the classical types of salt stoves.• During the process there are no pre-heating zones because pieces are turned around inside the heating bath.• The time of heating is shorter due to a high heat-transerence, which is increased througt graduated agitation of the treated pieces.• The process offers an altemative that compensates the additional cost of the gyratory mechanism, thanks to versatility of the operation as well as a noticeable energy savings which comes as a result of good uniformity heating in the moveable salt-bath.• The equipment provides a very good quality of service (function) in a very easy and safe way. The equipment is ecologically safe.

Prensa montadora para la preparación de muestras para análisis metalográfico

The mounting press was designed, constructed and installed in the Faculty ofEngineering of the UAEM, to carry out tests of plastic materials.The mounting press consists of an hydraulic jack of five tons, with a manometer, and a cylindrical heater of 500 W with a thermoregulator. With this design the cost was reduced up lo 70% In comparison with a similar imported equipment.

A cheap, reliable and efficient regulator for small horizontal-axis wind-turbines

This paper describes a passive regulator for the angular velocity of a small wind-turbine: it consists of a rigid short tail with an aerodynamic rotating vane to yaw the rotor smoothly edgewise to the wind direction in strong winds or in gusts, a bumper and a spring. This regulator reduces gyroscopic loads, is easy to adjust and can be manufactured in smaller sizes and is much stronger than conventional vanes used in small wind-machines. Besides, the energy collected with it is greater. Field test results indicate that its behavior agrees well with simulations, and that the regulator can be advantageously utilized, as compared with conventional vanes and other mechanical or electromechanical means, in horizontal axis wind-turbines with diameters between 2 and 12 m.Wind-turbine regulation HAWT

Medición de la fuerza de apriete en un ensamble utilizando tornillo autorroscante

En este artículo se presenta una metodología para medir la tensión en un tornillo autorroscante mediante el uso de galgas extensiométricas. Asimismo, se describen las ventajas y desventajas que se pueden presentar al momento de realizar la prueba. Esta metodología ayudará a dar una mejor referencia del comportamiento de estos tornillos en una ru1ión, así como a evitar diseños de mala calidad, propiciando un ahorro de tiempo y costo en la industria

Preparation, Characterization of Granulated Sulfur Fertilizers and Their Effects on a Sandy Soils

There is a potential for using sulfur waste in agriculture. The main objective of this study was to design a granular fertilizer based on waste elemental sulfur. Humic acids and halloysite were used to improve the properties and their influence on soil properties. This is the first report on the use of proposed materials for fertilizer production. The following granular fertilizers were prepared (the percentage share of component weight is given in brackets): fertilizer A (waste sulfur (95%) + halloysite (5%)), fertilizer B (waste sulfur (81%) + halloysite (5%) + humic acids (14%)), fertilizer C (waste sulfur (50%) + halloysite (50%)) and fertilizer D (waste sulfur (46%) + halloysite (46%) + humic acids (8%)). Basic properties of the obtained granulates were determined. Furthermore, the effect of the addition of the prepared fertilizers on soil pH, electrolytic conductivity, and sulfate content was examined in a 90-day incubation experiment. Enrichment with humic acids and the higher amount of halloysite increased the fertilizer properties (especially the share of larger granules and bulk density). In addition, it stabilized soil pH and increased the sulfur content (extracted with 0.01 mol·L−1 CaCl2 and Mehlich 3) in the soil

Myśl i polityka: księga pamiątkowa dedykowana profesorowi Jackowi Marii Majchrowskiemu T. 1b

Publikacja jubileuszowa z okazji 40-lecia pracy naukowej profesora Jacka Majchrowskieg