scholarly journals Orbit Design Elements of Chang’e 5 Mission

2021 ◽  
Vol 2021 ◽  
pp. 1-22
Author(s):  
Zhong-Sheng Wang ◽  
Zhanfeng Meng ◽  
Shan Gao ◽  
Jing Peng
Keyword(s):  
Design Methodology ◽  
Lunar Orbit ◽  
Orbit Design ◽  
Design Elements ◽  
Flight Data ◽  
Lunar Landing ◽  
Rendezvous And Docking ◽  
Mission Profile

The three key orbit design technologies employed in the Chang’e 5 mission are identified and discussed in this paper: orbit design for lunar orbit rendezvous and docking, orbit design for precision lunar landing and inclination optimization, and orbit design for Moon-to-Earth transfer. First, an overview of the Chang’e 5 mission profile is presented, which is followed by detailed discussions of the three key orbit design technologies, including an introduction of the tracking-based orbit design methodology. Flight data are provided to demonstrate the correctness of the designs.

scholarly journals Unlimited and protected memory for flight data recorders

2016 ◽  
Vol 88 (6) ◽  
pp. 866-872 ◽  
Author(s):  
Yair Wiseman
Keyword(s):  
Design Methodology ◽  
Memory Device ◽  
Social Implications ◽  
Embedded Memory ◽  
Content Type ◽  
Flight Data ◽  
Embedded Device ◽  
Use Of Internet ◽  
Practical Implications

Purpose The purpose of this paper is to study extensive enlargement and safety of flight data recorder memory. Design/methodology/approach The study involves the moving the memory of flight data recorders from an internal embedded device to a cloud. Findings The implementation has made the embedded memory device of flight data recorder effectively unlimited, and, hence, much more information can be stored. Research limitations/implications The possibility of a flight data recorder to be damaged or lost in a crash is not so high, but the implementation can be very helpful in cases such as aerial disappearances. Practical implications The implication is larger and protected memory for flight data recorders. Social implications Finding reasons for crashes is faster, and immediate actions can be taken to find remedy to the failures. Originality/value The use of internet and cellphones in airplanes is nothing special at present. It is suggested to take this technology for flight data recorders as well.

Electrophysiological assessment of cushions as attachment objects

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Okkyung Lee ◽  
Yejin Lee
Keyword(s):  
Design Methodology ◽  
Subjective Evaluation ◽  
Product Evaluation ◽  
Healthy Individuals ◽  
Content Type ◽  
Design Elements ◽  
Design Variables ◽  
Complex Approach ◽  
Electrophysiological Signals ◽  
Important Design

PurposeThis study aimed to investigate the effects a cushion has on electrophysiological signals and to identify the important design elements required for manufacturing better therapy cushions.Design/methodology/approachFour types of attachment cushions were manufactured by changing the shell fiber (cotton or microfiber) and the interlining (synthetic loose fiber or buckwheat). The products were evaluated by 20 healthy individuals (10 stable cushions and 10 unstable cushions). We examined the participants by electroencephalography (EEG) and electrocardiography (ECG).FindingsThe authors found significant differences in both EEG and ECG between participants with unstable and stable attachment types.Originality/valueA complex approach to emotional product evaluation was attempted by analyzing differences due to design variables of cushions through subjective evaluation as well as EEG and ECG.

That One Small Step

2000 ◽  
Vol 122 (10) ◽  
pp. 62-69
Author(s):  
Benedict J. Gaylo
Keyword(s):  
Motion Picture ◽  
Real Life ◽  
Lunar Orbit ◽  
Earth Orbit ◽  
The Moon ◽  
Small Step ◽  
Lunar Landing ◽  
Apollo Mission ◽  
Bus Voltage ◽  
Fair Degree

This article highlights that three approaches for the Apollo mission were considered and investigated early in the program: direct ascent, Earth orbit rendezvous, and lunar orbit rendezvous. Direct ascent would entail a direct shot from Earth to the moon, requiring an enormous rocket assembly, named the Nova rocket that required 15 first stage engines and would dwarf the Saturn V eventually selected as the launch vehicle. It also required a massive lunar landing vehicle to return the astronauts from the moon directly to Earth. At liftoff, the first stage burned 15 tons of fuel a second, requiring approximately 50,000 horsepower to power the fuel pumps to feed the engines. The Apollo 13 movie followed the actual flight with a fair degree of accuracy, recognizing that it had to compress four days of real-life tension into a two-hour motion picture. The film dramatized the explosion of the oxygen tank by showing the astronauts being thrown about in the cabin. In reality, the astronauts only heard a bang and then the warning alarm for low electrical bus voltage.

Exploring the design elements of open evaluation

2017 ◽  
Vol 10 (1) ◽  
pp. 40-65 ◽  
Author(s):  
Jörg B.A. Haller ◽  
Vivek K. Velamuri ◽  
Dirk Schneckenberg ◽  
Kathrin M. Möslein
Keyword(s):  
Design Methodology ◽  
Research Approach ◽  
Content Type ◽  
Design Elements ◽  
Wide Range ◽  
External Stakeholders ◽  
Innovation Contest ◽  
Innovation Processes ◽  
Practical Implications ◽  
Selection Of

Purpose Firms increasingly integrate a wide range of actors in the early ideation and concept creation phases of innovation processes leading to the collection of a large number of ideas. This creates the challenge of filtering the most promising ideas from a large number of submissions. The use of external stakeholders into the evaluation and selection of submissions (i.e. open evaluation (OE)) might be a viable alternative. The purpose of this paper is to provide a state-of-the-art analysis on how such OE systems are designed and structured. Design/methodology/approach Since OE is a new phenomenon, an exploratory qualitative research approach is adopted. In all, 122 instances of OE in 90 innovation contest cases are examined for their design elements. Findings This research reveals that OE systems are configured in many different ways. In total, 32 design elements and their respective parameters are identified and described along the six socio-technical system components of an OE system. This study allows for a comprehensive understanding of what OE is and what factors need to be taken into consideration when designing an OE system. Practical implications Scholars and professionals may draw insights on what design choices to make when implementing OE. Originality/value The comprehensive analysis performed in this study contributes to research on open and user innovation by examining the concept of OE. In particular, it extends knowledge on design elements of OE systems.

Learning by design: teacher pioneers

2016 ◽  
Vol 24 (3) ◽  
pp. 268-279
Author(s):  
Caroline Williams-Pierce ◽  
Theodore F. Swartz
Keyword(s):  
Instructional Design ◽  
Empirical Research ◽  
Design Methodology ◽  
Original Learning ◽  
Instructional Resources ◽  
Learning By Design ◽  
Content Areas ◽  
Content Type ◽  
Design Elements ◽  
Practical Implications

Purpose This purpose of this paper is to introduce innovative ways to design, develop and implement original learning experiences, by defining certain design elements with illustrative vignettes from the classrooms of teacher pioneers. Design/methodology/approach A new rubric of design elements is presented that synthesizes and illustrates theoretical and empirical research. Findings Teacher pioneers implement instructional design elements in a manner that supports the subordination of teaching to learning in their classrooms. Practical implications The rubric organizes criteria to design, implement, analyze and evaluate the extent to which instructional resources and approaches, at all levels and in all content areas, are likely to foster learners’ independence, autonomy and responsibility. Originality/value This paper provides a useful, concise and clearly explained rubric of design elements that, when most effectively implemented, can prepare students to meet, with enthusiasm and confidence, whatever comes their way.

Shared Control of Teleoperation Rendezvous and Docking in Lunar Orbit

2016 ◽  
Vol 29 (6) ◽  
pp. 04016043 ◽  
Author(s):  
Ya-Kun Zhang ◽  
Jian-Ping Zhou ◽  
Hai-Yang Li ◽  
Tao Li ◽  
Rui-Xue Huang
Keyword(s):  
Lunar Orbit ◽  
Shared Control ◽  
Rendezvous And Docking

Parameter estimation of UAV from flight data using neural network

2018 ◽  
Vol 90 (2) ◽  
pp. 302-311 ◽  
Author(s):  
Dhayalan R. ◽  
Subrahmanyam Saderla ◽  
Ajoy Kanti Ghosh
Keyword(s):  
Parameter Estimation ◽  
Design Methodology ◽  
Maximum Likelihood Method ◽  
Estimation Method ◽  
Likelihood Method ◽  
Estimation Methods ◽  
Process Noise ◽  
Content Type ◽  
Flight Data ◽  
Aerial Vehicle

Purpose The purpose of this paper is to present the application of the neural-based estimation method, Neural-Gauss-Newton (NGN), using the real flight data of a small unmanned aerial vehicle (UAV). Design/methodology/approach The UAVs in general are lighter in weight and their flight is usually influenced by the atmospheric winds because of their relatively lower cruise speeds. During the presence of the atmospheric winds, the aerodynamic forces and moments get modified significantly and the accurate mathematical modelling of the same is highly challenging. This modelling inaccuracy during parameter estimation is routinely treated as the process noise. Furthermore, because of the limited dimensions of the small UAVs, the measurements are usually influenced by the disturbances caused by other subsystems. To handle these measurement and process noises, the estimation methods based on neural networks have been found reliable in the manned aircrafts. Findings Six sets of compatible longitudinal flight data of the designed UAV have been chosen to estimate the parameters using the NGN method. The consistency in the estimates is verified from the obtained mean and the standard deviation and the same has been validated by the proof-of-match exercise. It is evident from the results that the NGN method was able to perform on a par with the conventional maximum likelihood method. Originality/value This is a partial outcome of the research carried out in estimating parameters from the UAVs.

Life is better in flip flops. Digital nomads and their transformational travels to Thailand

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Marko Orel
Keyword(s):  
Interpersonal Relationships ◽  
Design Methodology ◽  
Hospitality Industry ◽  
Hybrid Approach ◽  
Preliminary Review ◽  
Exact Nature ◽  
Content Type ◽  
Design Elements ◽  
Challenges And Opportunities ◽  
The Impact

Purpose The metamorphosis within the Thai segment of the hospitality industry has influenced the global outlook for hospitality services, shifting the focus from leisure to a hybrid approach of providing all-inclusive work-leisure offerings. The purpose of this paper is, therefore, to outline the hybridisation of the hospitality industry in Thailand that is frequented by digital nomads, and to discuss the adaptation of local infrastructure to accommodate this trend. Design/methodology/approach Taking the form of a research note, this paper assesses the impact that digital nomads are having upon the hospitality industry in Thailand, and describes how different localities have begun to respond to the challenges and opportunities this trend presents. Additionally, the paper proposes an empirical study that would evaluate the success of various types of work–leisure hubs in adapting to the needs of digital nomads, and the alignment of their offerings with the expectations of these travellers. Findings A preliminary review of available resources reveals that there are a variety of work–leisure spaces catering to the needs of digital nomads. These spaces tend to combine lodging accommodations with a shared office environment, incorporating design elements and social activities that are likely to foster interpersonal relationships between guests. Be that as it may, the exact nature of the work–leisure space models behind these environments is unclear. Originality/value The paper envisions a study that will enhance scholarly understanding of the transformation which the Thai hospitality industry is currently undergoing in response to the influx of digital nomads. These insights will enable industry experts to assess both the feasibility and profitability of diverse work-leisure models, and assist policymakers in different jurisdictions.

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