Making Repeated Choices: A Dual-Step Process

2008 ◽  
Author(s):  
Shenghua Luan ◽  
Shuli Yu
Keyword(s):  
2015 ◽  
Vol 58 ◽  
pp. 61-70 ◽  
Author(s):  
Paul B. Larsen

Ethylene is the simplest unsaturated hydrocarbon, yet it has profound effects on plant growth and development, including many agriculturally important phenomena. Analysis of the mechanisms underlying ethylene biosynthesis and signalling have resulted in the elucidation of multistep mechanisms which at first glance appear simple, but in fact represent several levels of control to tightly regulate the level of production and response. Ethylene biosynthesis represents a two-step process that is regulated at both the transcriptional and post-translational levels, thus enabling plants to control the amount of ethylene produced with regard to promotion of responses such as climacteric flower senescence and fruit ripening. Ethylene production subsequently results in activation of the ethylene response, as ethylene accumulation will trigger the ethylene signalling pathway to activate ethylene-dependent transcription for promotion of the response and for resetting the pathway. A more detailed knowledge of the mechanisms underlying biosynthesis and the ethylene response will ultimately enable new approaches to be developed for control of the initiation and progression of ethylene-dependent developmental processes, many of which are of horticultural significance.


1987 ◽  
Vol 58 (02) ◽  
pp. 786-789 ◽  
Author(s):  
O Behnke

SummaryAdhesion of rat blood platelets to native rat tail collagen fibrils was studied in the electron microscope under conditions that preserved collagen-associated proteoglycans (CAPG). The CAPG molecules were aligned in chain-like configurations that encircled the fibrils with a 65 nm period; they appeared to coat the fibrils completely and extended 60-100 nm away from the fibril. The initial platelet-fibril contact occurred between the platelet glycocalyx and the CAPG of the fibrils i.e. between two surfaces with net-negative charges. When close contact was established between the fibril surface proper and the platelet membrane, CAPG were not identified in the area of contact, and the collagen-platelet distance was reduced to a ~10-12 nm wide gap traversed by delicate links in register with fibril periodicities.


2020 ◽  
Author(s):  
Elbruz Murat Baba ◽  
Jose Montero ◽  
Dmitrii Moldarev ◽  
Marcos V. Moro ◽  
Max Wolff ◽  
...  

<p>We report preferential orientation control in photochromic gadolinium oxyhydride (GdHO) thin films deposited by a two-step process. Gadolinium hydride (GdH<sub>2-x</sub>) films were grown by reactive magnetron sputtering, followed by oxidation in air. The preferential orientation, grain size, anion concentrations, and photochromic response of the films are strongly dependent on the deposition pressure. GdHO films show preferential orientation along the [100] direction and exhibit photochromism when synthesized at deposition pressures up to 5.8 Pa and. The photochromic contrast is larger than 20 % when the films are deposited below 2.8 Pa with 0.22 H<sub>2</sub>/Ar flow ratio. We argue that the degree of preferential orientation defines the oxygen concentration which is known to be a key parameter for photochromism in rare-earth oxyhydride thin films. The experimental observations described above are explained by the oxidation-induced decrease of the grain size as a result of the increase of the deposition pressure of the sputtering gas. </p>


2019 ◽  
Vol 2 (3) ◽  
pp. 1-17
Author(s):  
Alina M. Zapalska ◽  
Ben Wroblewski

This paper illustrates the information literacy (IL) strategy in an undergraduate Management program at U.S. Coast Guard Academy. The paper exemplifies a sequential approach that improves students’ capabilities to evaluate and apply information in a specifically designed learning environment while generating new knowledge in undergraduate business coursework. The paper also emphasizes how IL can be developed within management coursework through a six-step process, including defining, locating, selecting, organizing, presenting, and assessing.  This specially designed framework of IL learning can be applied across all relevant courses using specially designed assignments in the Management major.


1994 ◽  
Vol 29 (12) ◽  
pp. 23-29 ◽  
Author(s):  
G. Voigtländer ◽  
E.-P. Kulle

The paper presents a small sewage treatment plant (package plant) operating without additional energy. Purification of sewage is achieved in a three-step process: sedimentation tank, anaerobic reactor and wastewater pond or aerobic reactor. The efficiency of the anaerobic reactor - in contrast to the efficiency of a common septic tank - is significantly increased by using fixed biomass systems. Further degradation of sewage compounds by adhering microorganisms occurs in pond or aerobic reactor. The bed for the aerobic biomass is made of a semipermeable plastic film and arranged in order to ensure simultaneous supply of oxygen. The three pilot plants are showing different results. The main aims of research i.e. lowering of operational costs, energy supply, minimizing of maintenance expenditure and cleaning work, reliability of degradation efficiency have been achieved so far for the anaerobic reactor.


NASPA Journal ◽  
2008 ◽  
Vol 45 (3) ◽  
Author(s):  
Diana Pace ◽  
Laurie Witucki ◽  
Kathleen Blumreich

This paper describes the rationale and the step by step process for setting up a WISE (Women in Science and Engineering) learning community at one institution. Background information on challenges for women in science and engineering and the benefits of a learning community for female students in these major areas are described. Authors discuss the specific steps taken to set up a residential WISE community including formation of a planning group, securing funding, and facilities, staffing, recruitment, programming, and retention.


2020 ◽  
Vol 10 (9) ◽  
pp. 3238
Author(s):  
Min Liu ◽  
Guangxin Wang ◽  
Panpan Xu ◽  
Yanfeng Zhu ◽  
Wuhui Li

In this study, the Ag3PO4/SnO2 heterojunction on carbon cloth (Ag3PO4/SnO2/CC) was successfully fabricated via a facile two-step process. The results showed that the Ag3PO4/SnO2/CC heterojunction exhibited a remarkable photocatalytic performance for the degradation of Rhodamine B (RhB) and methylene blue (MB), under visible light irradiation. The calculated k values for the degradation of RhB and MB over Ag3PO4/SnO2/CC are 0.04716 min−1 and 0.04916 min−1, which are higher than those calculated for the reactions over Ag3PO4/SnO2, Ag3PO4/CC and SnO2/CC, respectively. The enhanced photocatalytic activity could mainly be attributed to the improved separation efficiency of photogenerated electron-hole pairs, after the formation of the Ag3PO4/SnO2/CC heterojunction. Moreover, carbon cloth with a large specific surface area and excellent conductivity was used as the substrate, which helped to increase the contact area of dye solution with photocatalysts and the rapid transfer of photogenerated electrons. Notably, when compared with the powder catalyst, the catalysts supported on carbon cloth are easier to quickly recycle from the pollutant solution, thereby reducing the probability of recontamination.


2019 ◽  
Vol 75 (9) ◽  
pp. 735-741 ◽  
Author(s):  
Jiwon Lee ◽  
Gyuho Han ◽  
JunHo Kim

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Sara Farnbach ◽  
Julaine Allan ◽  
Raechel Wallace ◽  
Alexandra Aiken ◽  
Anthony Shakeshaft

Abstract Background To improve Australian Aboriginal and Torres Strait Islander people’s access to, and experience of, healthcare services, including Alcohol and other Drug (AoD) treatment services, principles and frameworks have been developed to optimise cultural responsiveness. Implementing those principles in practice, however, can be difficult to achieve. This study has five aims: i) to describe a five-step process developed to operationalise improvements in culturally responsive practice in AoD services; ii) to evaluate the fidelity of implementation for this five-step process; iii) to identify barriers and enablers to implementation; iv) to assess the feasibility and acceptability of this approach; and v) to describe iterative adaptation of implementation processes based on participant feedback. Methods Participating services were 15 non-Aboriginal AoD services in New South Wales, Australia. Implementation records were used to assess the implementation fidelity of the project. Structured interviews with chief executive officers or senior management were conducted, and interview data were thematically analysed to identify project acceptability, and the key enablers of, and barriers to, project implementation. Quantitative descriptive analyses were performed on the post-implementation workshop survey data, and responses to the free text questions were thematically analysed. Results A high level of implementation fidelity was achieved. Key enablers to improving culturally responsive practice were the timing of the introduction of the five-step process, the active interest of staff across a range of seniority and the availability of resources and staff time to identify and implement activities. Key barriers included addressing the unique needs of a range of treatment sub-groups, difficulty adapting activities to different service delivery models, limited time to implement change in this evaluation (three months) and the varied skill level across staff. The project was rated as being highly acceptable and relevant to service CEOs/managers and direct service staff, with planned changes perceived to be achievable and important. Based on CEO/management feedback after the project was implemented at the initial services, several improvements to processes were made. Conclusion The operationalisation of the five-step process developed to improve cultural responsiveness was feasible and acceptable and may be readily applicable to improving the cultural responsiveness of a wide variety of health and human services.


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