69 research outputs found
Emotions in business-to-business service relationships
Emotion in business-to-business service relationships regarding cargo services is explored. The service relationship is characterised by mutual trust and cooperation. Contact is mainly via telephone or e-mail with some face-to-face interactions and participants providing a complex, multi-skilled seamless service. Experience rather than training plays a vital role with long-term service relationships built up and maintained. Emotional sensitivity is acquired partly by experience and a repeat customer base but mainly through a genuine desire to help and get to know others. In contrast to the view of emotional labour bringing managerial control or adverse affects to service staff, the emotion engendered by this work is authentic expression bringing personal satisfaction
280 GHz Focal Plane Unit Design and Characterization for the SPIDER-2 Suborbital Polarimeter
We describe the construction and characterization of the 280 GHz bolometric
focal plane units (FPUs) to be deployed on the second flight of the
balloon-borne SPIDER instrument. These FPUs are vital to SPIDER's primary
science goal of detecting or placing an upper limit on the amplitude of the
primordial gravitational wave signature in the cosmic microwave background
(CMB) by constraining the B-mode contamination in the CMB from Galactic dust
emission. Each 280 GHz focal plane contains a 16 x 16 grid of corrugated
silicon feedhorns coupled to an array of aluminum-manganese transition-edge
sensor (TES) bolometers fabricated on 150 mm diameter substrates. In total, the
three 280 GHz FPUs contain 1,530 polarization sensitive bolometers (765 spatial
pixels) optimized for the low loading environment in flight and read out by
time-division SQUID multiplexing. In this paper we describe the mechanical,
thermal, and magnetic shielding architecture of the focal planes and present
cryogenic measurements which characterize yield and the uniformity of several
bolometer parameters. The assembled FPUs have high yields, with one array as
high as 95% including defects from wiring and readout. We demonstrate high
uniformity in device parameters, finding the median saturation power for each
TES array to be ~3 pW at 300 mK with a less than 6% variation across each array
at one standard deviation. These focal planes will be deployed alongside the 95
and 150 GHz telescopes in the SPIDER-2 instrument, slated to fly from McMurdo
Station in Antarctica in December 2018
Quantification of endogenous levels of IAA, IAAsp and IBA in micro-propagated shoots of hybrid chestnut pre-treated with IBA
Endogenous levels of indole-3-acetic acid (IAA),
indole-3-acetylaspartic acid (IAAsp) and indole-3-butyric
acid (IBA) were measured during the first 8 d of in vitro
rooting of rootstock from the chestnut ‘M3’ hybrid by high
performance liquid chromatography (HPLC). Rooting was
induced either by dipping the basal ends of the shoots into a
4.92-mM IBA solution for 1 min or by sub-culturing the
shoots on solid rooting medium supplemented with 14.8-
μM IBA for 5 d. For root development, the induced shoots
were transferred to auxin-free solid medium. Auxins were
measured in the apical and basal parts of the shoots by
means of HPLC. Endogenous levels of IAA and IAAsp
were found to be greater in IBA-treated shoots than in
control shoots. In extracts of the basal parts of the shoots,
the concentration of free IAA showed a significant peak 2 d
after either root inductive method and a subsequent gradual
decrease for the remainder of the time course. The
concentration of IAAsp peaked at day 6 in extracts of the
basal parts of shoots induced with 14.8-μM IBA for 5 d,
whereas shoots induced by dipping showed an initial
increase until day 2 and then remained stable. In extracts
from basal shoot portions induced by dipping, IBA
concentration showed a transient peak at day 1 and a plateau between day 2 and 4, in contrast to the profile of
shoots induced on auxin-containing medium, which
showed a significant reduction between 4 and 6 d after
transferred to auxin-free medium. All quantified auxins
remained at a relatively low level, virtually constant, in
extracts from apical shoot portions, as well as in extracts
from control non-rooting shoots. In conclusion, the natural
auxin IAA is the signal responsible for root induction,
although it is driven by exogenous IBA independently of
the adding conditions
Understanding Lecturers' Perceptions of Workplace Fear: An Interpretive Study in the Cypriot Higher Education Context
This chapter explores how Cypriot lecturers perceive and experience fear while being at work. Drawing on the lens of interpretive inquiry, data were collected through interviews with 19 lecturers. Analysis focused on experiences of workplace fear offering rich insights into characteristics of fear, eliciting events, and coping ways. Findings help to unveil the specific events that lead to fear in the Cypriot universities, and the ways lecturers manage their fearful experiences. The study contributes to the study of discrete emotions, by empirically examining fear’s own storyline through the workers’ own perspectives, within a specific context
Occurrence of Cyanazine Compounds in Groundwater: Degradates More Prevalent Than the Parent Compound
Friction torque in rolling bearings - methods and test facilities
W pracy przedstawiono teoretyczne i empiryczne zależności, pozwalające na wyznaczenie momentu tarcia w łożysku tocznym oraz wyniki oszacowania wartości momentu uzyskane w oparciu o te zależności. Dokonano oceny istniejących urządzeń do pomiaru momentu tarcia w łożysku i przedstawiono kierunki działań pozwalających zmniejszyć tarcie w łożysku i precyzyjniej go mierzyć.The paper presents theoretical and empirical equations to calculate friction torque of a rolling bearing and the results of an estimate of torque coming from these equations. It describes the evaluation of torque testers used in measuring the friction torque of a rolling bearing and indicates directions for further research aimed at decreasing friction and making more precise measurements
Investigation methods for rolling bearings in terms of current requirements for high performance products
Rozwój konstrukcji urządzeń mechanicznych wymusza intensywny postęp w produkcji łożysk tocznych. Kryteria, jakie muszą spełniać łożyska narzucają konieczność oferowania produktów dedykowanych dla konkretnych aplikacji. Wymaga to wypracowywania konsensusu pomiędzy poprawą istotnych a pogorszeniem nieistotnych dla tej aplikacji parametrów. Do oceny takich łożysk niezbędne jest użycie niestandardowych, nowoczesnych metod i urządzeń badawczych. W pracy omówiono znaczenie łożysk w eksploatacji urządzeń mechanicznych oraz wpływ ich wybranych parametrów na efektywność pracy w określonych aplikacjach. Przedstawiono cele, metody i urządzenia badawcze oraz określono potrzeby opracowania prostych i szybkich metod, usprawniających ocenę poprawności kojarzenia łożysk z aplikacjami.As a result of the development in machine design, progress investigation in rolling bearing production is necessary. The criteria for bearings dictate the production of bearings for specific applications. This requires a consensus between the improvement of significant bearing parameters and the deterioration of insignificant parameters for a specific application. In order to assess such bearings, it is essential that modern and special investigation methods and equipment should be used. This paper focuses on the importance of bearings in the performance of the machines and the influence of some bearing parameters in specific applications. In the paper, objective methods and investigation equipment have been presented as well as the needs for simple and quick methods to improve the assessment of selecting suitable bearings for specific applications
Metody badania poziomu drgań generowanych przez łożyska toczne oraz stanowisko badawcze do ich prowadzenia
The article presents research methods of rolling bearing vibration level measurement and evaluation of vibration measurement capability of Anderon meter STPPD developed at the Kielce University of Technology. In order to assess the measuring ability of Anderon meter STPPD comparative studies were performed. In these studies the noise tester MVH900 SKF - a standard instrument for measuring vibration, was adopted as a professional device. Analysis of the test results allow to reliably assess that both devices have comparable measurement capabilities.W artykule przedstawiono metody badań poziomu drgań generowanych przez łożyska toczne
oraz dokonano oceny zdolności pomiarowych stanowiska badawczego Anderometr STPPD
opracowanego na Politechnice Świętokrzyskiej. W celu oceny zdolności pomiarowych
Anderometru STPPD zostały przeprowadzone badania porównawcze. W badaniach tych za
przyrząd wzorcowy przyjęto profesjonalne urządzenie do pomiaru drgań: noise tester MVH900 firmy SKF. Analiza wyników badań pozwoliła stwierdzić, że oba urządzenia dysponują porównywalnymi możliwościami pomiarowymi
Expression and regulation of mPer1 in immortalized GnRH neurons
Hypothalamic GnRH (gonadotropin-releasing hormone) neurons play a critical role in the initiation and maintenance of reproduction competence. Using the mouse GnRH neuronal cell line, GT1-7, we have characterized the expression of the gene mPer1, a recognized key element of the mammalian circadian clockwork. Both mPer1 transcripts and the 136 kDa mPER1 gene product could be detected in these cells. Immunocytochemical analysis also confirmed expression of mPER1 both in vitro and in vivo in GnRH neurons. Activation of cyclic AMP signalling pathways in vitro elevated GnRH secretion as well as mPer1 expression and nuclear mPER1 immunoreactivity. As mPER1 is known to feedback on transcriptional activities in many cell models, the data presented here point to a role for mPER1 in the regulation of gene expression in GnRH neurons, and thus in the control of neuroendocrine activities
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