Development of a photobioreactor for large‐scale mass production of peat moss Sphagnum palustre

2020 ◽  
Vol 92 (9) ◽  
pp. 1199-1199
Author(s):  
I. Melková ◽  
C. Steinweg ◽  
C. Posten
2016 ◽  
Vol 106 (03) ◽  
pp. 125-130
Author(s):  
D. Hofbauer ◽  
J. Greitemann ◽  
M. Grammer ◽  
J. Kaufmann ◽  
G. Prof. Reinhart

Hochleistungswerkstoffe wurden bisher nur für Spezialanwendungen eingesetzt, da hohe Materialkosten und eine geringe Reife der Fertigungstechnologien die Anwendung in der Großserie erschwert haben. Um die grundlegende Eignung der Technologien unter Beachtung der Produktanforderungen zu ermitteln, präsentiert dieser Fachbeitrag eine Methodik für die systematische Bewertung, die am Beispiel der Großserienfertigung von Bauteilen aus Faser-Kunststoff-Verbundwerkstoffen (FKV) erläutert wird.   The use of high-performance materials has so far been limited to special applications for reasons of high material costs and low maturity of manufacturing technologies. These facts avoided their use in mass production in the past. This paper presents a method for systematically evaluating technologies to determine their fundamental suitability for mass production. It is exemplified by large-scale series production of fiber-reinforced plastic components.


2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Wang Bin ◽  
Qu Yu-xuan ◽  
Hu Shi-gang ◽  
Tang Zhi-jun ◽  
Li Jin ◽  
...  

During the process of heteroepitaxial growth, if the lattice constant of the growing film differs from that of the substrate, the wafer surface bows, regardless of whether the lattice mismatch occurs or not. As the growth in large-scale wafers speeds up, bowing effects are becoming more and more important. Wafer bowing has a direct impact on the yield in modern mass-production compound semiconductor industries. By using finite element analysis software, the bowing deformation of the GaN wafer on sapphire substrate can be studied. This paper summarizes the causes of bowing deformation, builds the mathematical model, and deduces the relation equation of the wafer bowing. The results show that epitaxial wafer bowing has a linear relationship with the square of the diameter of the substrate but has little relationship with the thickness of the substrate. Moreover, the relation equation of the wafer bowing is also simplified finally.


Micromachines ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 27
Author(s):  
Joon Hyong Cho ◽  
David Cayll ◽  
Dipankar Behera ◽  
Michael Cullinan

The demand for graphene-based devices is rapidly growing but there are significant challenges for developing scalable and repeatable processes for the manufacturing of graphene devices. Basic research on understanding and controlling growth mechanisms have recently enabled various mass production approaches over the past decade. However, the integration of graphene with Micro-Nano Electromechanical Systems (MEMS/NEMS) has been especially challenging due to performance sensitivities of these systems to the production process. Therefore, ability to produce graphene-based devices on a large scale with high repeatability is still a major barrier to the commercialization of graphene. In this review article, we discuss the merits of integrating graphene into Micro-Nano Electromechanical Systems, current approaches for the mass production of graphene integrated devices, and propose solutions to overcome current manufacturing limits for the scalable and repeatable production of integrated graphene-based devices.


2021 ◽  
Vol 104 (3) ◽  
pp. 003685042110381
Author(s):  
Yebo Lu ◽  
Quan Sun ◽  
Chuncheng Zuo ◽  
Chengli Tang ◽  
Haijun Song ◽  
...  

Silver micro/nanomaterials have attracted a great deal of attention due to their superior physicochemical properties. The atomic migration driven by electromigration or stress-induced migration has been demonstrated to be a promising method for the fabrication of metallic micro-/nanomaterials because of the advantage of simple processing. However, how to realize the controllable fabrication and mass production is still the critical technical problem for the method to be used in large-scale industrial applications. In this paper, the multilayered samples consisted of copper foil substrate, Ti adhesive layer, Ag film, and TiN passivation layer and with arrays of artificial holes on the passivation layer were applied to prepare arrays of Ag micro-particles. For the purpose of controllable fabrication, stress-induced migration experiments combined with finite element simulation were applied to analyze the influence of the passivation layer thickness and the heating temperature on the atom migration and Ag particles growing behavior. And the relationship between size of the fabricated Ag particles and the processing parameters of stress-induced migration experiments were also investigated. As a result, a proper structure size of the multilayered samples and heating temperature were recommended, which can be used for the Ag micro-particles controllable fabrication and mass production.


2011 ◽  
Vol 194-196 ◽  
pp. 503-506 ◽  
Author(s):  
Mei Liu ◽  
Yan Peng ◽  
Qiu Quan Guo ◽  
Jun Luo ◽  
Jun Yang

Efficient integration of synthetic nanotubes/nanowires into functional nanodevices by bottom-up approaches is the key of mass production of nanodevices, and is still a big challenge. Here we present a simple microfluidic method of patterning and aligning a large scale of carbon nanotubes by hydrodynamic focusing: the sample solution carrying carbon nanotubes were hydrodynamically controlled by the sheath flows. This method can be used to align and position both a large scale of nanotubes and a few lines of nanotubes to designated positions, offering a general pathway for assembly of nanosystems.


Arts ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 19
Author(s):  
Déirdre Kelly

It seems inherent in the nature of contemporary artist’s book production to continue to question the context for the genre in contemporary art practice, notwithstanding the medium’s potential for dissemination via mass production and an unquestionable advantage of portability for distribution. Artists, curators and editors operating in this sector look to create contexts for books in a variety of imaginative ways, through exhibition, commission, installations, performance and, of course as documentation. Broadening the discussion of the idea of the book within contemporary art practice, this paper examines the presence and role of book works within the context of the art biennale, in particular the Venice Art Biennale of which the 58th iteration (2019) is entitled ‘May You Live In Interesting Times’ and curated by Ralph Rugoff, with an overview of the independent International cultural offerings and the function of the ‘Book Pavilion’. Venetian museums and institutions continue to present vibrant diverse works within the arena of large-scale exhibitions, recognising the position that the book occupies in the history of the city. This year, the appearance for the first time, of ‘Book Biennale’, opens up a new and interesting dialogue, taking the measure of how the book is being promoted and its particular function for visual communication within the arts in Venice and beyond.


Animals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1243 ◽  
Author(s):  
Chelsea D. Miranda ◽  
Jonathan A. Cammack ◽  
Jeffery K. Tomberlin

Recent interest in the mass production of black soldier fly (BSF) larvae has resulted in many studies being generated. However, a majority of the studies are benchtop, or small-scale, experiments. Results generated from such studies may not translate to large-scale/industrial production. The current study was conducted at a conventional large-scale (10,000 larvae/treatment fed seven kg) to determine the impact on selected life-history traits when BSF were fed seven kg of manure (swine, dairy, or poultry) or a control diet (Gainesville diet: 50% wheat bran, 30% alfalfa meal, and 20% corn). Results showed larvae fed dairy manure took one to two days longer to develop to prepupation, with lower survivorship (45%) compared to those fed poultry or swine manure (>70%). Furthermore, the maximum larval weight was reached on day six for those fed swine manure, while other treatments achieved the maximum weight on day seven. However, larvae fed swine manure averaged 150 mg, while those fed the other diets ranged between 175 and 200 mg. Data from this study may be valuable for the industrialization of BSF. Companies using a scale varying from previously published work, including this study, should conduct pilot studies to optimize their system prior to implementation.


2013 ◽  
Vol 19 (6) ◽  
pp. 458-472 ◽  
Author(s):  
Mohammad A. Alamein ◽  
Sebastien Stephens ◽  
Qin Liu ◽  
Stuart Skabo ◽  
Patrick H. Warnke

2012 ◽  
Vol 1426 ◽  
pp. 15-26 ◽  
Author(s):  
X. Niu ◽  
C. Yu ◽  
M. Wang ◽  
G. Li ◽  
X. Zhu ◽  
...  

ABSTRACTOver the past decade, the PV industry has witnessed tremendous growth in manufacturing scale and technology advancement, with PV generated electricity cost ever approaching grid parity. Among them, Si based thin film technology has made substantial progress in demonstrating its inherent advantages in lower material cost, ease of manufacturing and higher energy yield, etc. More recently, reduced product prices and competing technologies from crystalline silicon and other thin film technologies have made amorphous and microcrystalline silicon based thin film technology very challenging, and requires further increase in module efficiency and decrease in manufacturing cost. As one of the few companies in the world with significant manufacturing capacity for tandem thin film Si PV products, Chint Solar (Astronergy) has been at the forefront of technology development for the mass production of large-scale (Gen. 5, 1.43m2) Si thin film solar modules in the last 5 years. We will review major technology advancements which have been mass production proven and led to the mass produced tandem silicon thin film module with 10.0% plus stabilized efficiency, along with the field performance of those modules.


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