Top Research Papers on Space

Spacers for spacing sheets of glass (30, 30 ') in an insulating glass unit, to a dimensionally flexible elongate body (12) which extends along a longitudinal direction (14) substantially, which in the mounted state parallel to the (at a distance from holding glass panes 30, 30 ') proceeds, wherein the base body (12) has two side surfaces (24, 24') (for Anlanger on the glass panes 30, 30 ') and transversely to the side surfaces (24, 24') has a substantially (in the longitudinal direction 14) extending underside (16), wherein (at the bottom 16) a plate-shaped locking element (18) is arranged, wh...

This paper presents the results of visibilitization experiment which is carried out to measure the pressure rise and to observe the wave propagations when the explosion occurs in the model of nuclear fuel cycle facility (NFCF). Numerical simulation is also performed to compare the phenomena in NFCF. NFCF is modeled as the closed space in these experiment and simulations. As a result, it is confirmed that the explosion which occurs in closed space is reflected in the complexity at the walls and interfered mutually with progressing waves. It is observed that the pressure rise repeatedly at the c...

The 3 February 2022 launch of 49 of SpaceX's Starlink satellites has provided a fascinating example of how even modest space weather can have significant practical and financial consequences. Enhanced atmospheric drag associated with a minor geomagnetic storm led to the loss of the majority of the 49 launched satellites. Although the 36th launch by SpaceX in the past 3 years, it was the first that experienced stormy space weather. We expect more stormy space weather as Solar Cycle 25 ramps up toward its peak expected in 2025. A subsequent Starlink launch on 21 February used a higher initial or...

SpaceX's Dragon spacecraft is delivering almost 7,000 pounds of cargo, including the Bigelow Expandable Activity Module (BEAM), to the orbital laboratory following its launch on a Falcon 9 rocket at 4:43 p.m. EDT from Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida.

The Falcon 1 and Falcon 9 launch vehicles and the Dragon spacecraft are each poised to reduce the price point by a factor of five to ten compared to vehicles with equivalent capabilities, paving the way for dramatic changes in the authors' use of space.

In this PhD research by thesis, the author documents his journey that explores modes of operations beyond those predominantly applied at NASA. Specifically, he is looking at designerly and artistic modes of operation, with a research goal to show demonstrable value to enhance NASA’s capability to innovate. This exploration is built on cybernetic perspectives and goal-seeking focused on human centered design within NASA’s space exploration paradigm. The author uses a performative approach through real world examples to highlight and substantiate the benefits of novel perspectives, conversation...

SpaceX is scheduled to launch its Dragon spacecraft for its eleventh commercial resupply mission to the International Space Station June 1 from NASA’s Kennedy Space Center’s historic pad 39A.

SpaDE phase I has evaluated the viability of the SpaDE concept and shown that space debris can be mitigated in lower LEO orbits using gravity wave perturbations from relatively low altitudes.

A spacer (1) for spacing a tool such as a drill motor from a tool stand such as a drill stand, the spacer (1) comprising a spacer body (2) and a locking member (3), the spacer body (2) having first (4) and second (5) opposing faces, the locking member (3) extending from a first end (6) thereof adjacent to the first face (4) to a second end (7) thereof adjacent to the second face (5), the locking member (3) being able to slide relative to the spacer body(2) along a direction from the first end (6) to the second end (7), the first end (6) and the second end (7) each being provided with at least ...

Abstract : The objective of the SPICE program was to demonstmte improvement in precision pointing, tracking, and retargeting by integration of active isolation, active and passive structural control, advanced materials, active optics, and adaptive control. Available flinding allowed only the implementation of the active isolation and active structural control. A linear, ftill-size, and well-characterized precision test-bed was developed to represent a space-based laser beam director structure. Key SPICE subsystem developments included: (1) an optical sensing system to calculate the optical lin...

In the late summer and fall of 1983 articles appeared in such publications as the New York Times, Fortune Magazine, and Science News telling of attempts to set up an agency for the selling of kidneys from living donors.

The SpaceX launches raise collision risks, according to the US space agency, the Federal Aviation Administration (FAA).

Tissue engineering of cartilage was studied on the Mir Space Station and on Earth to study the feasibility of long-term cell culture f light experiments and to assess the effects of space- f light on the growth and function of a model musculoskeletal tissue.

The notions of G-space, W-space, if-space, and higher order Whitehead product are differentiated through example.

Research on narratives in an Australian language demonstrated surprising facts about speakers’ spatial orientation and knowledge both in the insistent use of morphologically hypertrophied spoken directional terminology and in accompanying gestures. Pursuing comparable phenomena in a Mayan language from the other side of the globe revealed correspondingly complex gestural devices for communicating about location and direction but with very different kinds of support from speech. Evidence from a new sign language, emerging in the same Mayan context, suggests that mechanisms for signing about spa...

Wheeler emphasized the study of Superspace( ) ‐ the space of 3-geometries on a spatial manifold of fixed topology . This is a configuration space for GR; knowledge of configuration spaces is useful as regards dynamics and QM. In this Article I consider furthmore generalized configuration spaces to all levels within the conventional ‘equipped sets’ paradigm of mathematical structure used in fundamental Theoretical Physics. This covers A) the more familiar issue of topology change in the sense of topological manifolds (tied to cobordisms), including via pinched manifolds. B) The less familiar is...

The idea of space is central in the way we think. We organize our perceptions in physical space, we think of time as a one-dimensional continuum, and we carry spatial notions over to any number of our conceptual constructs. Nevertheless, in some sense space is ‘our’ technology, wonderfully evolved for dealing with our experience of the physical world. It is probably only an approximation to reality. Long ago I happened to be looking at an account of quantum field theory written ‘for the general reader’ by Freeman Dyson, one of my favorite writers about science. I came upon a passage where he s...

We live in the space age where space and astronomy discoveries are rapidly expanding and space-related technologies are becoming part of our daily life. While space education programs mostly address people interested in studying astronomy and space science, the need arises for informing and educating the rest of the society in order to build a space faring generation. SpacEd system provides introductory classes for three recipient groups; those who seek space literacy, those who want to be part of the growing space travel market, and those who are considering joining emerging branches of space...

Abstract : The Space Launch Vehicle (SLV) industry has been around for a long time, but few companies have managed to enter this industry. SpaceX was founded only 10 years ago, but it has managed to become a leader in the U.S. industry and a dominant player worldwide. The purpose of this thesis research is to discover what it took for SpaceX to break into this tightly controlled industry. A qualitative analysis was performed to compare SpaceX to companies that overcame the barriers of entry for their respective industries. SpaceX, like FedEx, could implement a unique technique to the industry ...

The present invention relates to a spacer device, a free space located in the support member and a top body between the cross-connected to the backpack such as a roof rack by a threaded bolt that is screwed into the synthetic material synchronization member for traction.

SpaceX launched its 14th resupply mission to the International Space Station Monday, sending a reused cargo ship to the orbiting lab.

A system, method, and computer program product are provided for extending a lifetime of memory as a result of increasing the spare space in the memory.

This article looks through the lens of speculation at a scenario connecting the US-Mexico border complexities with the industrialization of outer space. Based on an art-oriented and multifaceted research process including fieldwork and conversations with Playa Bagdad’s residents, the scrutiny of SpaceX environmental impact assessments, and attendance to several Federal Aviation Administration (FAA) public hearings; this compilation of ideas investigates the subjectivities intrinsic to the coexistence of Playa Bagdad (Tamaulipas, MX) and SpaceX (Texas, US) through the social and political impli...

ABSTRACT Whereas the rise of private space entrepreneurship is indisputable, we contend that contrary to the “NewSpace” narrative, the development of privately owned and operated human spacefaring does not dispel or fundamentally alter the American space dream, but rather implies continuity of the narrative of America as the dominant global space power, specifically regarding a return to the Moon and with the explicit aim of colonizing Mars. Herein, we analyze the continuity of the American space dream and how it is expressed by public and private space actors, as well as being supported by po...

The work deals with the topic of spare parts management in a space system. The paper is divided into three parts. The first one is dedicated to the characterization of the system structure and presents the particularities related to the spare‐elements procurement. Modelling is the object of the second part. After having exposed the bases of the problem to be solved, a macro‐model is introduced. Each of the three elements of an orbital system, namely ground, flying and transport, is then described with a Petri net. Operation specificities of every element are then listed and integrated into the...

A US space firm that successfully launched its first rocket last month has boosted its prospects as a commercial supplier to ferry cargo and astronauts into low Earth orbit.

Major experiments that will look into a range of scientific disciplines from human health to atmospheric conditions on Earth are on their way to the International Space Station following liftoff at 9:39 a.m. EST aboard a SpaceX Falcon 9 rocket.

To reduce the absorption by the LED die (12) of the light emitted by the phosphor layer (48), the semiconductor layer of the LED die (12) for performing absorption, a relatively thick glass plate mounted to the LED die (44 ) by, or by the LED die transparent growth substrate, it is spaced apart from the phosphor layer. Thus, phosphor light emitted at a sufficient angle towards the LED die, will be leaving the side wall of the spacer through the transparent spacer (44), that their light is absorbed by the LED die There is prevented. LED die may be a GaN-based. The spacer is the thickness of at ...

Dozens of scientific experiments are scheduled to travel to the International Space Station aboard a Dragon cargo spacecraft in late July.

This paper argues that communicative and behavioural patterns used online together with the intersection of these patterns with offline conventions (particularly those about the role regulatory and interpretive functions of locale, and the distinction between public and private), give people their sense of the 'space' in cyberspace. Cyber 'space' is deeply im plicated by the use and categorization of offline spaces. I take it that space does not simply exist neutrally as a container, to be filled by things, but that the particular quality of space, and the space itself, exists in feedback with...

This article discusses the representation of library spaceas a space for pragmatic and ideological contestations. The methodology used here was qualitative by observation, interview and documentation. The study found that pragmatically, space in library can be defined by aspects of function of space, requirement for information, availability of WiFi facility, and phys-ical material. Meanwhile, in ideological contestation, library space can be defined by aspects of historical space and paradoxical space.

The logistics resources (in the form of spare parts) for future exploration missions to the Moon and Mars can have significant mass and volume requirements. In this study it is shown that reconfigurable or common parts, that allow use of the same component in dierent mission elements, can be a means of reducing the required number of spares. A model for determining the system availability as a function of spares level is developed for a mission that utilizes elements with reconfigurable or common parts. An explicit consideration of the operating scenario is made which allows for using componen...

The spacer includes regulatory induction that help to retain the spacer opening in a desired configuration for receiving and containing body exudates.

The mathematical analysis used in the model enables the user to select the most suitable selection of the spare package for the mission planned, and demonstrates the applicability and usefulness of the model introduced.

Abstract : The Logistics Management Institute developed a methodology that estimates the optimal orbital replaceable unit (ORU) spares inventory for NASA's Space Station Freedom. NASA is using this methodology to select a spares inventory that maximizes station availability, i.e., the probability that no critical system is inoperative for lack of an ORU spare over the resupply cycle. Spares are ranked in order of decreasing benefit per cost (the improvement provided to station availability per dollar) and added, in that order, to the inventory until a target resource expenditure or availabilit...

At the basic of introducing the connotation of the geographic space and the spatial differentiation within geographical science,this paper introduces two turns in geography space research with emphasis that are from natural space to social space and realistic space to virtual space.The research indicated that geographic space is a relatively clear concept,but its connotation is also in constant development,especially after human geography separated from the physical geography.The differences in studying geographical space among the three big branches of geographical science are enormous,among ...

ABSTRACT From an economic point of view, we can distinguish three successive phases in the development of space business. In the first phase, space activities were government driven and based upon national prestige, and were financed with public money. In a second phase, large space companies, as a reaction against reduced government space funding, responded to a market demand and used their own funds or debt financing to perform commercial space business. Since approximately the year 2000, we note a third phase, whereby entrepreneurs acquire equity funding to develop independently space appli...

IN ALMOST every period Western intellectual life has been preoccupied with the problem of time and history. In the last fifty years this preoccupation has become an obsession, especially in literature and theology. Like most obsessions it has tended to numb our perception for other realms of experience. As philosophy of religion and theology stir toward a wider consciousness, they are slowly beginning to focus on the realm of nature and space. Of course, there have long been premonitions of this turn toward nature. Some of the intellectual forces which were responsible for our fascination with...

Spatial terminology is used in many fields, including that of psychotherapies, in ways that often go unremarked. Human geographers have expressed ambivalence about an apparent proliferation of spatial thinking, challenging taken-for-granted meanings attributed to ‘space’. Drawing especially on feminist geography, this article outlines two of the most influential re-theorisations of space – as relational and as performative – that have ensued.

Starting from the phenomenological analysis of perception and of representation made by Jaspers, and from a poem of the German poet Mathias Claudius, the author displays rapidly the emergency of the subject in the space, with the progressive development of the corporal sketch. If the child learns with difficulty to recognize other people, he will have need of a much longer time to recognize his own corporal unity in the mirror stage. That first recognition of his unity is imaginary and creates the interior space. With other people's presence, a relation of reciprocity settles, and the desire o...

WARNING: WORKING VERSION, NOT FINAL, THANKS FOR COMMENTS. MSC 2010: 20N05; 53C17; 16T25

It is provedthat the normedlinear spaceR∞imcomplete,R∞={(an)|an∈R,{an} being a real boundedsequence,‖(an)‖ =snu≥p1λn|an|}.Its complete space are conjugate space are given,andthe sufficient or neces-sary conditions are obtainedfor a linear operator fromRtoRto be continuous.

0. Introduction. Given a topological space X, we can consider the group G(X) of all autohomeomorphisms of X. Much is known about the relationship between X and G(X) for certain restricted classes of the space X; Whittaker [7] has shown that the existence of an isomorphism between any two sufficiently large subgroups of G(X) and G(Y) implies that X and Y are actually homeomorphic, whenever these are both compact, locally Euclidean manifolds, with or without boundary; Fine and Schweigert [1] give a detailed analysis of G(U); recently, Neumann [4], Mekler [3] and Truss [6] have considered in dept...

In this paper we shall explicitly calculate the formula of the algebraic presentation of an embedding of the Teichmuller space T(M) into the Goldman space G(M). From this algebraic presentation, we shall show that the Goldman's length parameter on G(M) is an isometric extension of the Fenchel-Nielsen's length parameter on T(M):

In this work the assumption of quadratic integrability will be replaced by the integrability of |f (x)| p. The analysis of these function classes will shed a particu­ lar light on the real and apparent advantages of the exponent 2; one can also expect that it will provide essential material for an axiomatic study of function spaces. At present I propose above all to gather results about linear operators defined in certain general spaces, no­ tably those that will here be called spaces of type (B)... Function spaces, in particular L p spaces, play a central role in many questions in analysis. T...

NALOGIES between the arts are always dangerous and have not infrequently led to a complete misunderstanding of that which they have been intended to explain. Because music has never developed an independent vocabulary, however, interchanging its few individual words with those relating to other arts and sciences, such analogies in its case have been unavoidable. There are conditions in the art of music which can be described in no other terms than those which, strictly applied, relate to other matters, and some of them to matters which have no direct or exclusive reference to either art or sci...

In this paper it is proved that when .¥/ is a kR-space then pX (the smallest subspace of ßX containing X with the property that each of its bounded closed subsets is compact) also is a /cÄ-space; an example is given of a kR -space X such that its Hewitt realcompactification, vX, is not a /cÄ-space. We show with an example that there is a non-/cÄ-space X such that vX and pX are kR-spaces. Also we answer negatively a question posed by Buchwalter: Is pX the union of the closures in vX of the bounded subsets of A"? Finally, without using the continuum hypothesis, we give an example of a locally co...

The total energy demanded by space missions of the future is expected to exceed past needs by orders of magnitude. The unit costs of this energy must be reduced from present levels if these missions are to be carried out at projected budget levels. The broad employment of electric propulsion and the capability to utilize novel high power sensors hinge on the availability of systems lighter by factors of ten or more than have flown to date. The NASA program aimed at providing the technological basis to meet these demands is described in this paper. Research and technology efforts in areas of en...

In Manto’s stories about prostitutes, set in Mumbai (then Bombay), the city is presented with a kaleidoscopic projection of space. In the story, “Ten Rupees,” the volumetric space of the city, conventionally dominated by the male characters – Kishori, Kifayat, Anwar, and Shahab, is overshadowed by the abstract space created in it by the female protagonist – Sarita. Sarita, a fifteen-year-old prostitute, is presented in the story as an Object (the Other in the Subject-Other dichotomy) of men’s desire. However, she switches to the Subject position in her interactions with her customers Kifayat, ...

An investigation into the nature of the experience that developers have with the spaces in which they work and live based on the reflections of the authors describes a few aspects of the structure of developers' experience around the malleability, ownership and control of the spaces and the emotions they induce.