Search results for "kani"
showing 10 items of 311 documents
Hippocampal theta-band activity and trace eyeblink conditioning in rabbits.
2009
The authors examined the relationship between hippocampal theta activity and trace eyeblink conditioning. Hippocampal electrophysiological local field potentials were recorded before, during, and after conditioning or explicitly unpaired training sessions in adult male New Zealand White rabbits. As expected, a high relative power of theta activity (theta ratio) in the hippocampus predicted faster acquisition of the conditioned response during trace conditioning but, contrary to previous results obtained using the delay paradigm, only in the initial stage of learning. The presentation of the conditioned stimulus overall elicited an increase in the hippocampal theta ratio. The theta ratio dec…
Reactions of m-Terphenyl-Stabilized Germylene and Stannylene with Water and Methanol: Oxidative Addition versus Arene Elimination and Different React…
2015
Reactions of the divalent germylene Ge(ArMe6)2 (ArMe6 = C6H3-2,6-{C6H2-2,4,6-(CH3)3}2) with water or methanol gave the Ge(IV) insertion product (ArMe6)2Ge(H)OH (1) or (ArMe6)2Ge(H)OMe (2), respectively. In contrast, its stannylene congener Sn(ArMe6)2 reacted with water or methanol to produce the Sn(II) species {ArMe6Sn(μ-OH)}2 (3) or {ArMe6Sn(μ-OMe)}2 (4), respectively, with elimination of ArMe6H. Compounds 1–4 were characterized by IR and NMR spectroscopy as well as by X-ray crystallography. Density functional theory calculations yielded mechanistic insight into the formation of (ArMe6)2Ge(H)OH and {ArMe6Sn(μ-OH)}2. The insertion of an m-terphenyl-stabilized germylene into the O–H bond was…
Odpowiedzialność pracodawcy z tytułu mobbingu - porównanie roszczenia o zadośćuczynienie i odszkodowanie z uwzględnieniem statystyk sądowych
2019
Artykuł poddaje analizie problematykę odpowiedzialności pracodawcy z tytułu stosowania wobec pracownika mobbingu. W rozważaniach odniesiono się zarówno do doktryny oraz orzecznictwa, w szczególności Sądu Najwyższego, wskazując na liczne kontrowersje pojawiające się w tej materii. Omówiono zarówno kwestię zadośćuczynienia, jak i odszkodowania, zwracając uwagę na różnice występujące pomiędzy tymi dwoma roszczeniami przysługującymi pracownikowi w przypadku doświadczenia przez niego mobbingu w miejscu zatrudnienia, jednocześnie wskazując na charakter odpowiedzialności – tj. kontraktowy czy też odszkodowawczy. W ostatniej części odniesiono się do statystyk sądowych obrazujących liczbę wszczynany…
In vivo localized gastrocnemius subtendon representation within the healthy and ruptured human Achilles tendon
2022
The Achilles tendon (AT) is composed of three distinct in-series elastic subtendons, arising from different muscles in the triceps surae. Independent activation of any of these muscles is thought to induce sliding between the adjacent AT subtendons. We aimed to investigate displacement patterns during voluntary contraction (VOL) and selective transcutaneous stimulation of medial (MGstim) and lateral (LGstim) gastrocnemius between ruptured and healthy tendons, and to examine the representative areas of AT subtendons. Twenty-eight patients with unilateral AT rupture performed bilateral VOL at 30% of the maximal isometric un-injured plantarflexion torque. AT displacement was analysed from sagi…
PUASONA VIENĀDOJUMA RISINĀŠANA ELEKTRONU STRUKTŪRAS SIMULĀCIJĀS AR DAŽĀDU PERIODISKUMU
2022
Puasona vienādojuma risināšana ir neatņemama elektronu struktūras aprēķinu sastāvdaļa. Atkarībā no pētāmās sistēmas periodiskuma, elektrostatiskajam potenciālam ir izdevīgi pielietot dažādus robežnosacījumus, taču pievienoto plakano viļņu bāzē Puasona vienādojumu risina, izmantojot periodiskus robežnosacījumus. Šajā darbā es implementēju Puasona vienādojuma risināšanas metodes, kas ir piemērotas arī aprēķinos joniem, molekulām, polimēriem un divdimensiju materiāliem. Šāda pieeja saglabā augstu precizitāti, arī samazinot vienības šūnas izmēru. Demonstrēju lielu ieguvumu nelokālas apmaiņas aprēķinos, izmantojot manu implementēto metodi.
Nanoscale etching of III-V semiconductors in acidic hydrogen peroxide solution: GaAs and InP, a striking contrast in surface chemistry
2019
In this study of nanoscale etching for state-of-the-art device technology, the importance of surface chemistry, in particular the nature of the surface oxide, is demonstrated for two III-V materials. Striking differences in etching kinetics were found for GaAs and InP in sulphuric and hydrochloric acidic solutions containing hydrogen peroxide. Under similar conditions, etching of GaAs was much faster, while the dependence of the etch rate on pH, and on H2O2 and acid concentrations also differed markedly for the two semiconductors. Surface analysis techniques provided information on the product layer present after etching: strongly non-stoichiometric porous (hydr)oxides on GaAs and a thin st…
Gait Variability Using Waist- and Ankle-Worn Inertial Measurement Units in Healthy Older Adults
2020
Gait variability observed in step duration is predictive of impending adverse health outcomes among apparently healthy older adults and could potentially be evaluated using wearable sensors (inertial measurement units, IMU). The purpose of the present study was to establish the reliability and concurrent validity of gait variability and complexity evaluated with a waist and an ankle-worn IMU. Seventeen women (age 74.8 (SD 44) years) and 10 men (73.7 (4.1) years) attended two laboratory measurement sessions a week apart. Their stride duration variability was concurrently evaluated based on a continuous 3 min walk using a force plate and a waist- and an ankle-worn IMU. Their gait complexity (…
Muscle-tendon architecture in Kenyans and Japanese : Potential role of genetic endowment in the success of elite Kenyan endurance runners
2022
Aim The specificity of muscle-tendon and foot architecture of elite Kenyan middle- and long-distance runners has been found to contribute to their superior running performance. To investigate the respective influence of genetic endowment and training on these characteristics, we compared leg and foot segmental lengths as well as muscle-tendon architecture of Kenyans and Japanese males (i) from infancy to adulthood and (ii) non-athletes versus elite runners. Methods The 676 participants were divided according to their nationality (Kenyans and Japanese), age (nine different age groups for non-athletes) and performance level in middle- and long-distance races (non-athlete, non-elite and elite …
Lannerangan ja lonkan ojentajalihasten aktivaatiotason arviointi emg-muutosten avulla koordinaatio- sekä voimaharjoituksissa terveillä naisilla ja mi…
1998
Smoothed particle hydrodynamics virtausmekaniikan simulaatioissa
2016
Tässä opinnäytetyössä käsittelemme Smoothed Particle Hydrodynamics -menetelmää (SPH) virtausmekaniikan simulaatioissa. Aluksi johdamme nesteen liikettä kuvaavat differentiaaliyhtälöt. Määrittelemme SPH:n diskreetit divergenssi-, gradientti- sekä Laplace-operaattorit avaruuden diskretisoimiseksi. Lisäksi tutkimme SPH:n toimivuutta rajoitetuissa virtauksissa ja esittelemme menetelmiä rajoituksista seuraavien ongelmien korjaamiseksi tutkien erityisesti SPH:n renormalisaatiota. Lopulta käsittelemme ajan diskretisointia, simulaatiototeutuksessa tarvittavia tietorakenteita ja reunaehtoja sekä esittelemme simulaatiotuloksia sekä analyyttisesti ratkeaville Couette- ja Poiseuille -virtauksille sekä …