2,655 research outputs found
Creating a Reference Model for the Creative Industries – Evaluation of Configurable Event Driven Process Chains in Practice
The Australian screen business is facing new challenges to stay competitive. Increasing globalization on the one hand offers new opportunities for service-related companies but on the other hand raises the competition in drawing the attention of production companies. Motivated by a lack of process-centered management support, this work aims to deliver a starting point for an application of Business Process Management principles and practices within the Creative Industries to help facing the new challenges. I therefore present a reference process model for the post production part of screen business productions. To allow for comprehensive adaptation to project-specific scenarios or a company’s requirements the model is developed as Configurable Even-Driven Process Chain. The designated reference modeling language provides means to clearly specify process variations. In a second step I use the application in a real-life case to contribute to the empirical validation of the modeling language and to reflect on the relevance and completeness of the language
Veterinary Arsenicals
Feed medication and other forms of chemotherapy in our meat-producing animals have caused heated controversies. Some of this confusion is due to both a distortion of and a lack of information. Arsenicals are some of the oldest compounds whose use in agriculture has been questioned. An attempt will be made to trace the historical use of arsenicals and to discuss their metabolism and side effects from a veterinarian\u27s point of view
Forage Management for Extending the Grazing Season
Studies were conducted to determine ways to extend grazing season with forages adequate to meet the needs of grazing animals and to reduce the cost of livestock production. Perennial grasses were swathed, windrowed and left in the field until they were winter-grazed with bred heifers. Corn (Zea mays L.) was stockpiled for winter grazing with lambs and ewes. Windrowed grasses increased in acid detergent fiber (ADF) and neutral detergent fiber (NDF) compared with stored hay, but crude protein content, heifer weight gain and body condition change was similar for both forages. An economic value of 75 ha-1. Leaving windrows of perennial grasses in the field and stockpiling corn for winter grazing have potential for reducing reliance on stored forages
Generalized Hurst exponent and multifractal function of original and translated texts mapped into frequency and length time series
A nonlinear dynamics approach can be used in order to quantify complexity in
written texts. As a first step, a one-dimensional system is examined : two
written texts by one author (Lewis Carroll) are considered, together with one
translation, into an artificial language, i.e. Esperanto are mapped into time
series. Their corresponding shuffled versions are used for obtaining a "base
line". Two different one-dimensional time series are used here: (i) one based
on word lengths (LTS), (ii) the other on word frequencies (FTS). It is shown
that the generalized Hurst exponent and the derived curves
of the original and translated texts show marked differences. The original
"texts" are far from giving a parabolic function, - in contrast to
the shuffled texts. Moreover, the Esperanto text has more extreme values. This
suggests cascade model-like, with multiscale time asymmetric features as
finally written texts. A discussion of the difference and complementarity of
mapping into a LTS or FTS is presented. The FTS curves are more
opened than the LTS onesComment: preprint for PRE; 2 columns; 10 pages; 6 (multifigures); 3 Tables; 70
reference
A Method for Cost-Effective and Rapid Characterization of Engineered T7-based Transcription Factors by Cell-Free Protein Synthesis Reveals Insights into the Regulation of T7 RNA Polymerase-Driven Expression
The T7 bacteriophage RNA polymerase (T7 RNAP) serves as a model for understanding RNA synthesis, as a tool for protein expression, and as an actuator for synthetic gene circuit design in bacterial cells and cell-free extract. T7 RNAP is an attractive tool for orthogonal protein expression in bacteria owing to its compact single subunit structure and orthogonal promoter specificity. Understanding the mechanisms underlying T7 RNAP regulation is important to the design of engineered T7-based transcription factors, which can be used in gene circuit design. To explore regulatory mechanisms for T7 RNAP-driven expression, we developed a rapid and cost-effective method to characterize engineered T7-based transcription factors using cell-free protein synthesis and an acoustic liquid handler. Using this method, we investigated the effects of the tetracycline operator's proximity to the T7 promoter on the regulation of T7 RNAP-driven expression. Our results reveal a mechanism for regulation that functions by interfering with the transition of T7 RNAP from initiation to elongation and validates the use of the method described here to engineer future T7-based transcription factors
Zinc oxide films grown by galvanic deposition from 99% metals basis zinc nitrate electrolyte
The use of relatively low purity zinc nitrate for electrochemical deposition
of compact ZnO films is attractive for large scale production because of the
cost saving potential. ZnO films were grown on SnO2:F and magnetron sputtered
ZnO:Al templates using a three electrode potentiostatic system in galvanic
mode. The electrolyte consisted of a 0.1 M zinc nitrate solution (either
99.998% or 99% purity) and 1 mM aluminium nitrate for extrinsic doping, when
required. Moderate deposition rates of up to 0.9 nm s−1 were achieved on
ZnO:Al templates with lower rates of up to 0.5 nm s−1 on SnO2:F templates.
Observation of SEM images of the films revealed a wall-like morphology whose
lateral thickness (parallel to the substrate) reduced as aluminium was added
to the system either in the electrolyte or from the substrate. However, pre-
deposition activation of the template by applying a negative voltage
(approximately −2 V) allowed the growth of compact films even for the low
purity electrolyte. The optical band gap energy of intrinsically doped films
was lower than that of the Al doped films. The composite electrical
conductivity of all the films studied, as inferred from sheet resistance and
Hall effect measurements of the ZnO/template stacks was much less than that of
the uncoated templates. A strong E2 (high) mode at around 437 cm−1 was visible
in the Raman spectra for most films confirming the formation of ZnO. However,
both the Raman modes and XRD reflections associated with wurtzite ZnO
diminished for the Al doped films indicating a high level of mainly oxygen
related defects. Based on these data, further studies are underway to improve
the doping efficiency of aluminium, the crystalline structure and thus the
conductivity of such films
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