Ikusezintasunerantz: eremu elektromagnetikoen kontrola metamaterialen bidez

Historian zehar, greziar mitologiatik gaur egun arte , gizakiak ikusezin izatearekin amestu du. Hala ere, duela urte gutxi arte ez da benet an zientifikoki azaldu nola gauzatu amets hori . Tachi - ren lanetik [1 ] hasita , non transparentzia birtual bat lortzen den, metamaterialen mundura pasatzen da argi - izpiak nahi eran d esbideratuz eta modu honetan ikusezintasun a lortuz. Metamaterialak artifizialki sortutako mate rialak dira, laborategietan dis einatuak eta guk behar ditugun propietateez esleitu ak . Hau en bidez , ingurune baten permitibitate elektrikoa eta iragazkortasun magnetikoa , eta ondorioz handik pasatzen diren uhin elektromagnetikoak kontrolatzea lortzen da. Horrela, argiaren desbiderapen kontrolatua lortu nahi da , eta fenomeno hori deskribatzen duen formalismoari transformazioaren optik a deritzo . Honi esker, esater ako, ikusezintasun - estalki esferiko batek, modu teoriko batean nola funtzionatu ko lukeen kalkulatu eta simula daiteke. Hala ere, ikusezintasunaren zientzia k hasi besterik ez du egin eta oraindik lan handia dago egiteko arlo honen inguruan, oraindik ez b aita begi bistaz antzematen d en objektu rik iku sezin bihurtu

Implementation of the nursing process in a health area: models and assessment structures used

Objective: to analyze what nursing models and nursing assessment structures have been used in the implementation of the nursing process at the public and private centers in the health area Gipuzkoa (Basque Country). Method: a retrospective study was undertaken, based on the analysis of the nursing records used at the 158 centers studied. Results: the Henderson model, Carpenito's bifocal structure, Gordon's assessment structure and the Resident Assessment Instrument Nursing Home 2.0 have been used as nursing models and assessment structures to implement the nursing process. At some centers, the selected model or assessment structure has varied over time. Conclusion: Henderson's model has been the most used to implement the nursing process. Furthermore, the trend is observed to complement or replace Henderson's model by nursing assessment structures.

A behavior model for blood donors and marketing strategies to retain and attract them

Objective: analyze and propose a theoretical model that describes blood donor decisions to help staff working in blood banks (nurses and others) in their efforts to capture and retain donors. Methods: analysis of several studies on the motivations to give blood in Spain over the last six years, as well as past literature on the topic, the authors' experiences in the last 25 years in over 15 Non Governmental Organizations with different levels of responsibilities, their experiences as blood donors and the informal interviews developed during those 25 years. Results: a model is proposed with different internal and external factors that influence blood donation, as well as the different stages of the decision-making process. Conclusion: the knowledge of the donation process permits the development of marketing strategies that help to increase donors and donations.