Recalibration of the NBS Glass Standards of Spectral Transmittance

In 1934, Gibson, Walker, and Brown developed sets of four colored glass filters to serve as working standards of spectral transmittance for checking the reliability of spectrophotometers. Several sets of these glasses were measured carefully and reserved and designated as future reference standards. Duplicate standards evaluated by comparison with the reference standards are available by purchase to the public. The current set of reference standards was established in the years 1945 to 1947, and one of these reference standards (selenium-red) was recalibrated in 1952. This paper reports a recalibration, made in 1961 and 1962, of all four glasses (selenium-red, carbon-yellow, copper-green, cobalt-blue) on three spectrophotometers (Cary 14, Beckman DU, König-Martens). Except for the cobalt-blue standard, the values of spectral transmittance found differ from those previously assigned by amounts differing at some wavelengths by as much as or slightly more than the uncertainties estimated for the present values, though not by amounts exceeding the combined uncertainties of the present and previous determinations. The indicated changes for these three standards are fairly regular, however, and support the view that the selenium-red and carbon-yellow standards are changing chiefly by formation of a reflectance-reducing film on the surfaces. The indicated rate of upward drift is slow, and suggests that it takes about 10 years for the drift to exceed the assigned uncertainity.     

The influence of irrelevant biographical information in teacher evaluation.

Investigated the importance of out-of-role Research in teacher evaluation. 60 administrators were presented 1 of 2 variations of a teacher's application form from which they assessed the personality traits of the teacher and indicated their interest in seeing the teacher for an interview. A multivariate analysis of variance revealed that altering responses for out-of-role behavior (positive vs negative) resulted in significantly lower trait ratings and less likelihood of an interview for the teacher with negative out-of-role behavior than for the teacher with positive out-of-role behavior (p     

Shared parenting agreements after marital separation: The roles of empathy and narcissism.

The identification of psychological and interpersonal factors that predict cooperation and agreement between ex-spouses is important to understanding, and eventually promoting, healthy postdivorce adjustment of parents and their children. By drawing on object relations theory, the authors identified differences between 16 ex-couples who were able to negotiate and maintain a cooperative parenting plan after separation ( "agreed ex-couples") and 16 ex-couples who disagree about parenting arrangements ("disagreed ex-couples") but were similar in age, educational background, age of their children, and time since separation. As expected, disagreed ex-couples were more narcissistic, more interpersonally vulnerable, less able to take another's perspective, less concerned about the feelings and needs of others, more self-oriented, and less child-oriented and more self-important in their parenting attitudes than agreed ex-couples. Our findings also supported a process mediational model of "child-centeredness" that attempts to elucidate the pathways through which these variables are interrelated… (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Some effects of testing methodology on children's cross-modal performance.

Tested 40 41-57 mo old children on the number of trials they took to learn the identical form-discrimination problem given in either visual or tactual modalities in either "held" (E gave S the reward) or "platform" (S himself picked up the reward) conditions. It appears that when testing methodology is equated in the 2 modalities, cross-modal transfer of a simple form discrimination is not asymmetrical, but rather is equivalent to the transfer from the tactual to the visual modality. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Determination of the geographical origin of processed spice using multielement and isotopic pattern on the example of Szegedi paprika

This case study presents a fast and reliable method of combining strontium isotope ratios (⁸⁷Sr/⁸⁶Sr) with a multielement pattern (Rb, Sr, Y, Zr, Mo, Cd, Ba, Pb, Th, U, Mg, Ca, Sc, Ti, Cr, Mn, Fe, Co, Ni, Cu, Zn, As and rare earth elements) by means of inductively coupled plasma mass spectrometry (ICP-MS) to establish a unique fingerprint of authentic Szegedi Fűszerpaprika (PDO) and classify authentic and purchased paprika from different known, declared and unknown geographical origin using multivariate statistical tools (principal component and canonical discriminant analysis). Since paprika represents a processed spice, alterations in element and Sr isotopic composition throughout the production process were investigated. The Sr source in the final product was identified to stem from bioavailable Sr sources in soil. Therefore, the ammonium nitrate extract of a soil is sufficient to establish a Sr fingerprint for agricultural products of a region. As a consequence, the spice paprika can be traced back to its geographical origin even after processing.     

Airflow inside an open ventilated system: Influence of operator’s arms or moving conveyor

This study deals with the influence of static and dynamic objects on the airflow (generated by a unidirectional air supply) inside an “open” ventilated system used in an agro-food production line. Firstly, the presence of operator’s arms, considered here as objects, leads to the appearance of recirculating zones under each arm. The influence of different positions of the static arms protected by gloves on the airflow organization has been studied. Secondly, modifications induced by the motion of a conveyor system or of moving arms on the airflow have been explored.In an experimental approach, airflow organization has been studied by visualization and by Particle Image Velocimetry for static cases and moving conveyor case.Numerical simulations were carried out using Computational Fluids Dynamics codes. Results obtained for moving gloves cases highlight the contribution of dynamic meshes tools, implemented in the CFD codes to make simulations of moving objects.     

Stratification Dynamics and Geothermal Potential of a Deep Shaft in the Flooded Wolf Mine,Siegerland/Germany

Mine Water and the Environment - Mine water hydraulics and geothermal potential of a deep shaft of the flooded Wolf mine in the Siegerland ore district of the Rhenish Massif in Germany were...     

Creative clusters in the regeneration of Valletta and the cultural politics of Strait Street

The paper aims to unfold the narrative of development in a creative cluster project for the regeneration of Strait Street in Valletta, Malta. This is approached by first examining the distinctive, historically contentious background of the neighbourhood and, thereafter, unpacking the development narrative of policy documents and the discursive and material constructs about the creative city approach to regeneration strategies in the city. Using a ‘system-wide’ analytical framework, this material is then scrutinized to gain an understanding of the specificities involved and, finally, discuss the crucial features of the key dimensions elucidating the potential strengths and weaknesses of the case