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  • Author: Peter Simons x
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Abstract

It is argued that the source of complexity in language is twofold: repetition, and syntactic embedding. The former enables us to return again and again to the same subject across many sentences, and to maintain the coherence of an argument. The latter is governed by two forms of complexification: the functor-argument structure of all languages and the operator-bound-variable mechanism of familiar formal languages. The former is most transparently represented by categorial grammar, and an extension of this can adequately describe the syntax of variable binders. Both developments have roots within the work of the Lvov-Warsaw School.

Abstract

Using the semiempirical PM6 method, structures of a rod-like [Ti40O124H81]7– model cluster and of [Ti40O124H81Cu]5– with Cu2+ coordinated at various sites were optimized in order to assess the toxicity of rutile nanoparticles. If the relative toxicity of individual Ti centers in rod-like rutile nanoparticles can be evaluated by the electron density transfer to a Cu2+ probe, its maximal values can be ascribed to the pentacoordinated corner and hexacoordinated edge Ti centers with three Ti—OH bonds. However, these centers exhibit the least negative interaction energies which can be compensated by the significantly better accessibility of the corner Ti center compared with that of the remaining ones. Ti centers with the most negative interaction energy parameters exhibit the lowest extent of electron density transfer to a Cu2+ probe. Rutile nanoparticles destruction starts at pentacoordinated Ti face centers.

Abstract

The growing pressure to increase productivity and production quality is one of the reasons for the growing interest in using automated production facilities, such as robots. In many enterprises, automated lines are introduced that partially or completely replace the human factor. The automotive industry was one of the first to start using automated robots and still is the one of the largest users of these devices. Flexibility and affordability enabled robots to become part of the industry’s automation strategy. In order to achieve the desired goals, it is necessary to modernize and automate workplaces or to create completely new concepts of grouping of machines and industrial robots. An increasing trend in the use of robotic technology has caused several factors that have changed significantly in the recent years in favor of automated workplaces. The main changes made by industrial robots to the fore are improving their technical parameters, high reliability, affordability, reduced operating and maintenance costs.

Abstract

Performance evaluation of a formulated infant food on some biological indices in Wistar rats was investigated. For rats fed separately with normal rat feed, formulated infant food and proprietary food, serum total protein and albumin were determined by colorimetric method, red blood cell (RBC) and differential white blood cell (WBC) counts were determined with a haemocytometer, packed cell volume (PCV) was by micro-haematocrit, haemoglobin (HGB) was determined using cyanomethaemoglobin method while mean cell volume (MCV) and mean cell haemoglobin (MCH) were calculated. The results obtained showed that, for Wistar rats fed with normal rat feed, the baseline values prior to the commencement of feeding trial for serum total protein, albumin, body weight, PCV, WBC, platelet count (PLT), RBC, HGB, lymphocyte count (LYM), MCH, MCV, neutrophil (NEU), and eosinophil (EOS) were 82.9 g/dL, 44.75 g/dL, 142.80g, 41.14%, 7.60×103 μL−1, 404.85×103 μL−1, 5.68×106 μL−1, 10.80 g/dL, 50.28 %, 18.42 pg, 59.28 fL, 45.57 %, and 2.57 % respectively. After the feeding trial, the serum total protein, albumin, body weight, PCV, WBC, PLT, RBC, HGB, LYM, MCH, MCV, NEU, and EOS in Wistar rats fed with the formulated infant food (the experimental group) were 79.6 g/dL, 50.65 g/dL, 169.18g, 40.14%, 5.77 ×103 μL−1, 309.85 ×103 μL−1, 6.85×106 μL−1, 12.45 g/dL, 52.85 %, 18.24 pg, 58.64 fL, 42.00 %, and 2.14% respectively and these were in most cases, either greater or comparable with their corresponding mean values of 69.1 g/dL, 44.40 g/dL, 177.97 g, 30.24%, 4.18×103 μL−1, 188.14×103 μL−1, 5.29×106 μL−1, 10.74 g/dL, 53.14 %, 20.37 pg, 57.61 fL, 38.85 %, and 4.57 % respectively in Wistar rats fed with the proprietary infant formula (the control group). This shows that the potential infant food has a more positive effect on most of the biological indices assessed than the proprietary infant food or a comparable effect at the least.