Dynamic Product Assembly and Inventory Control for Maximum Profit

We consider a manufacturing plant that purchases raw materials for product assembly and then sells the final products to customers. There are M types of raw materials and K types of products, and each product uses a certain subset of raw materials for assembly. The plant operates in slotted time, and every slot it makes decisions about re-stocking materials and pricing the existing products in reaction to (possibly time-varying) material costs and consumer demands. We develop a dynamic purchasing and pricing policy that yields time average profit within epsilon of optimality, for any given epsilon>0, with a worst case storage buffer requirement that is O(1/epsilon). The policy can be implemented easily for large M, K, yields fast convergence times, and is robust to non-ergodic system dynamics.Comment: 32 page

Development Of Technological Decisions On Production Of Capsulated Products Based On Dairy Raw Materials

Capsulated products – is a segment of the food industry with high rates of development in directions of creating analogues of black and red caviar, oil-fatty capsulated products, capsulated sauces, capsules, based on milk raw materials and also getting capsules with probiotic properties. It is determined, that milk is used as a “passive” recipe component (excretion of separate components, matrix for bifidobacteria) with the additional use of СаСІ2 for realizing encapsulation processes. It determines the aim of the studies – development of new technological principles and approaches to the technologies of processing dairy raw materials taking into account their chemical and technological potentials. At that there is offered to use the potential of lactocalcium of whey for realizing the encapsulation process that gives a possibility to exclude auxiliary substances, especially СаСІ2 from the technological process. There was developed the innovative plan of products, within which there is presented the conception of new products, their competitive advantages, determined the segment of users and consumers. There was elaborated the technological process of producing capsulated products, based on dairy raw materials involving secondary milk products, especially whey. It is noted, that the necessity of introducing whey is conditioned by its properties to be a donor of ionic calcium that is a condition of encapsulation process realization. There were studied the ways of the development of the technology of capsulated products, so a possibility of getting both fermented products and pasteurized ones appears at the expanse of thermostable properties of the coat of capsulated semi-products. It is determined, that the offered technological decisions allow to define directions of milk processing, to create products with high food properties and to offer products of new commodity forms – soft capsulated snack cheeses, soft capsulated dessert cheeses. It is proved, that the technological process of producing capsulated products taking into account consuming advantages provides the effectiveness of business functioning in the link “milk industry-restaurant industry-consumer”

Lignocellulosic resources uses for savings of fossil fuels

Lignocellulosic biomass makes up the main part of the biomass produced in the world (12.1011 ton per year); relatively speaking, saccharose and starch make up a lower part (108t). Wood (from secondary-growth species) and related biomaterial from primarygrowth species (palms, coconut, bamboo) make up nearly 80% of lignocellulosic biomass produced in the world. The remaining part mainly comes from co-products of food plants (straw and co-products from cereals and oleaginous plants, bagasse...) and also annual plants produced for fibre (cotton, flax, hemp). A part of these fibres is used for other various applications than energy: pulp, biomaterial, and bioproducts. The wide range of celluloses- lignin-hemicelluloses distribution and structure of these biopolymers sometimes limit their applications. The development of these applications is also limited by two factors: (1) the collection and the transport of the fibres are not well organized; (2) the fibres must be frequently left on the ground after harvesting in order to maintain the soil fertility. Lignocellulosic materials play a major role to save fossil fuels for three main reasons: (1) their elaboration and their use need a low quantity of energy, by comparison with other materials; (2) lignocellulosic materials capture carbon during plant growth and store it during the life cycle of the manufactured products; (3) savings of energy are also possible when the biomaterials are used on the spot instead of imported materials, without long transport distances. It is economically interesting to produce energy from lignocellulosic biomass only if a part of this biomass is used as far as possible for higher added value applications, i.e. plant materials. Co-products and by-products used for energy are then obtained at lower cost. Lignocellulosic materials and energy applications are directly linked due to carbon storage in biomass that is used for energy at the end of life cycle. (Résumé d'auteur

Parent materials of Yellow-brown loams in the Waikato-Coromandel district.

The yellow-brown loams of the Waikato-Coromandel region are derived from weathered airfall volcanic materials. These materials may be either direct airfall deposits, or erosion products of these deposits, described as reworked ash in some publications. In the erosion products small amounts of other rocks may be included in the parent materials, and these additions may modify to a slight degree the chemical and physical properties of the soil as a yellow-brown loam. In larger amounts these additions result in the formation of intergrades to yellow-brown earths or gley soils

Toxicity of the pyrolysis products of spacecraft materials

A number of spacecraft construction materials are evaluated for the toxic effects of their thermodegradation products on rats. Pyrolysis toxicity testing of pyrolysate fumes establish carbon monoxide, carbon dioxide and hydrogen cyanide as the most common intoxicating agents. Generally, COHb levels of animals expiring in the test chamber suggest higher concentrations of CO are produced with larger samples of most materials

A Multi-Chamber System for Analyzing the Outgassing, Deposition, and Associated Optical Degradation Properties of Materials in a Vacuum

We report on the Camera Materials Test Chamber, a multi-vessel apparatus which analyzes the outgassing consequences of candidate materials for use in the vacuum cryostat of a new telescope camera. The system measures the outgassing products and rates of samples of materials at different temperatures, and collects films of outgassing products to measure the effects on light transmission in six optical bands. The design of the apparatus minimizes potential measurement errors introduced by background contamination.Comment: 9 pages, 10 figures, published in RSI (minor edits made to match journal accepted version

Toxicity of thermal degradation products of spacecraft materials

Three polymeric materials were evaluated for relative toxicity of their pyrolysis products to rats by inhalation: Y-7683 (LS 200), Y-7684 (Vonar 3 on Fiberglass), and Y-7685 (Vonar 3 on N W Polyester). Criteria employed for assessing relative toxicity were (1) lethality from in-chamber pyrolysis, (2) lethality from an outside-of-chamber pyrolysis MSTL Procedure, and (3) disruption of trained rats' shock-avoidance performance during sub-lethal exposures to in-chamber pyrolysis of the materials

Designing identity of a new material: a new product design approach

The present research is a design practice-based research based on the industrial development of a new concrete. The research focuses on the development of the specific identity of a new material. The research is aimed at demonstrating that product design can be used as a new strategy to create the material identity and thus to differentiate from existing materials. In order to design material specific identity in new products, we need to understand the perception process of shaped materials. Therefore we conducted exploratory study of materials recognition in products. We identified two types of products: the “messenger” products are specific shapes characteristic from the material; the “wrong messenger” products are imitations of other well known materials. The results of questionnaire about material recognition show that it’s more or less easy to identify material according to each product (whether it’s familiar or new shapes; whether it’s imitation or specific shapes and whether it’s well known or new material). We conclude on two types of shapes: on the one hand some familiar and typical shapes make easier and more certain the material recognition; on the other hand some new shapes make people more uncertain of what it is made of but more amazed. Designing amazing new shapes can be used as a new differentiation strategy to create the specific sensory identity of each new material. It means that the product can be a really useful support to fully communicate about a new material, beyond the traditional material samples. Keywords: New Material; Sensory Identity; Product Design</p

Application of manufactured products

A wide range of products can be manufactured from the following materials: (1) lunar regolith or basalt; (2) regolith or rock beneficiated to concentrate plagioclase or other minerals; (3) iron, extracted from lunar soil or rocks by various means; (4) naturally occurring or easily obtained materials that have cementitious properties; and (5) byproducts of the above materials. Among the products that can be produced from these materials are the following: beams; plates and sheets; transparent plates (windows); bricks and blocks; pipes and tubes; low-density materials (foams); fiber, wire, and cables; foils and reflective coatings; hermetic seals (coatings); and formed objects. In addition to oxygen, which can be obtained by several processes, either from unbeneficiated regolith or by reduction of concentrated ilmenite, these materials make the simplest requirements of the lunar resource extraction system. A thorough analysis of the impact of these simplest products on the economics of space operations is not possible at this point. Research is necessary both to define optimum techniques and adapt them to space and to determine the probable market for the products so that the priority of various processes can be assessed. Discussions of the following products are presented: aerobraking heat shields; pressurized habitats; lunar photovoltaic farms; and agricultural systems

Evaluation of polymeric products for use in thermal-vacuum environment

Of 350 materials screened for outgassing characteristics, 100 qualify within the limits of less than 1 percent weight loss and less than 0.1 percent VCM /volatile condensible material/ content. Infrared absorbence spectra of the VCM from 96 polymeric products and an interim list of recommended products are identified