Finite bounded expanding white hole universe without dark matter

The solution of Einstein's field equations in Cosmological General Relativity (CGR), where the Galaxy is at the center of a finite yet bounded spherically symmetrical isotropic gravitational field, is identical with the unbounded solution. This leads to the conclusion that the Universe may be viewed as a finite expanding white hole. The fact that CGR has been successful in describing the distance modulus verses redshift data of the high-redshift type Ia supernovae means that the data cannot distinguish between unbounded models and those with finite bounded radii of at least $c \tau$. Also it is shown that the Universe is spatially flat at the current epoch and has been at all past epochs where it was matter dominated.Comment: 11 pages, revised versio

Mass transfer cooling on a porous flat plate in carbon-dioxide and air streams

Mass transfer cooling on porous flat plate in carbon dioxide and air stream

Equilibrium temperatures of mass transfer cooled walls in high-speed flow of an absorbing-emitting gas

Equilibrium temperatures of mass transfer cooled walls in high speed flow of absorbing-emitting ga

Carmeli's accelerating universe is spatially flat without dark matter

Carmeli's 5D brane cosmology has been applied to the expanding accelerating universe and it has been found that the distance redshift relation will fit the data of the high-z supernova teams without the need for dark matter. Also the vacuum energy contribution to gravity indicates that the universe is asymptotically expanding towards a spatially flat state, where the total mass/energy density tends to unity.Comment: 4 pages, 5 figures, accepted for publication in Int. J. Theor. Physics, this paper is based on an invited talk at FFP6, Udine, Italy, Sept 200

Mrub_2052, Mrub_0628, and Mrub_2034 genes are predicted to be orthologous to b0688, b2039, and b3789 genes found in \u3cem\u3eEscherichia coli\u3c/em\u3e, which are involved in streptomycin biosynthesis

We predict that Mrub_2052 encodes the enzymephosphoglucomutase (DNA coordinates 2088542..2090185 on the complement strand which is the 00521 step of the Streptomycin Biosynthesis pathway (KEGG map number 5.4.2.2). It catalyzes the conversion of D-Glucose- 6P (also known as D-glucopyranose 6-phosphate) to D-Glucose-1P (also known as α-D-glucopyranose 1-phosphate). The E. coli K12 MG1655 ortholog is predicted to be b0688, which has the gene identifier pgm. We predict that Mrub__0628 encodes the enzyme glucose-1-phosphate thymidylyltransferase (DNA coordinates 605559..606635 on the complement strand, which is the 00521 step of the Streptomycin Biosynthesis pathway (KEGG map number 2.7.7.24). It catalyzes the conversion of D-Glucose-1P to dTDP-glucose (also known as dTDP-α-D-glucose). The E. coli K12 MG1655 ortholog is predicted to be b2039, which has the gene identifier rfbA. We predict that Mrub__2034 encodes the enzyme glucose-1-phosphate thymidylyltransferase (DNA coordinates 2071868..2072941 on the complement strand, which is the 00521 step of the Streptomycin Biosynthesis pathway (KEGG map number 2.7.7.24). It catalyzes the conversion of D-Glucose-1P to dTDP-glucose (also known as dTDP-α-D-glucose). The E. coli K12 MG1655 ortholog is predicted to be b3789, which has the gene identifier rffH

Inter-specific variation in bud banks and flowering effort among semi-arid African savanna grasses

Population viability and productivity of grasses in southern African savannas are dependent upon both successful seed production and tiller recruitment from the belowground bud bank. Relative recruitment rates from buds versus seeds influence population dynamics, genetic diversity, and patterns of vegetation productivity. We assessed patterns in bud bank size and flowering effort in fourteen semi-arid savanna grass species in the Kalahari region of Botswana. There was high inter-specific variability and between-year variability in flowering effort (percentage of tillers flowering). Bud production (number of buds per tiller) exhibited high inter-specific variability, but was more consistent between-years than flowering effort. Relative allocation to flowering versus bud production varied with life history, with longer-lived perennial grasses showing higher bud production and lower flowering effort relative to shorter-lived grasses. Several species showed higher bud production and lower flowering effort in a wet year compared to a dry year, and grass species that are regularly grazed maintained significantly larger bud banks than non-grazed species. These differential demographic responses among co-occurring species suggest that environmental change in semi-arid savannas may alter the composition, relative abundances and diversity of grasses, and that the maintenance of a belowground bud bank is an important factor influencing their resiliency, their capacity to recover from grazing and/or drought, and their persistence and sustainability under changing environmental conditions. Meristem-limitation in species that maintain few viable buds may constrain their population viability under changing conditions in semi-arid savannas. (C) 2012 SAAB. Published by Elsevier B.V. All rights reserved

Performance of Multi-Beacon DGPS

Historically, maritime organizations seeking accurate shipboard positioning have relied upon some form of differential GNSS, such as DGPS, WAAS, or EGNOS, to improve the accuracy and integrity of the GPS. Groundbased augmentation systems, such as DGPS, broadcast corrections to the GPS signal from geographically distributed terrestrial stations, often called beacons. Specifically, pseudorange corrections for the GPS L1 C/A signal are computed at each reference site, then broadcast in the nearby geographic area using a medium frequency (approximately 300 kHz) communications link. The user then adds these corrections onto their measured pseudoranges before implementing a position solution algorithm. Within the United States, the U.S. Coast Guard operates 86 DGPS reference beacons. Similar DGPS systems are operated in Europe and elsewhere around the globe. While current DGPS receiver algorithms typically use one set of pseudorange corrections from one DGPS reference site (often the one with the “strongest” signal), many user locations can successfully receive two or more different DGPS broadcasts. This brings to mind obvious questions: “If available, how does one select the corrections to use from multiple sets of corrections?” and “Is it advantageous to combine corrections in some way?” We note that a number of factors might influence the effectiveness of any particular station’s corrections. Some of these refer to the effectiveness of the communications link itself, including concerns about interference from other beacons (skywave interference from far-away beacons on similar frequencies, a notable problem in Europe) and self-interference (skywave fading). Other factors refer to the accuracies of pseudorange corrections. For example, ionospheric storm-enhanced plasma density (SED) events can cause the corrections to have large spatial variation, making them poor choices even for users close to a beacon. Earlier work in the area of DGPS beacon selection has identified several options including choosing the beacon closest to the user or the beacon with the least skywave interference. There have also been suggestions on how to combine corrections when multiple beacons are available. The most common of these is a weighted sum of the corrections, where the weights are typically inversely proportional to the distance from the user to the individual beacon. This paper reexamines the concept of multi-beacon DGPS by evaluating methods of combining beacon corrections based on spatial relativity. Of relevance to this topic is our recent observation that DGPS accuracy performance is biased. The mean of the error scatter with DGPS corrections does not fall on the actual receiver position. We established this both by processing GPS L1 C/A observables from hundreds of CORS (Continuously Operating References Station) sites around the U.S.A. and via simulation using a Spirent GSS8000 GPS simulator. Specifically, we found that the position solution computed using DGPS beacon corrections is typically biased in a direction away from the beacon, and that the size of the bias depends upon the distance from the beacon. This bias grows with a slope of approximately one-third of a meter per 100 km of user-to-beacon distance. This paper compares the performance of several multibeacon algorithms assessed using GPS simulator data. These algorithms include the nearest beacon, a weighted sum based on distances, and a spatial linearly-interpolated correction using the actual locations of the transmitters (distance and angle). We note that as part of this research effort we developed a DGPS receiver using software-defined radio (USRP). A complete description of this system is included in the paper

Getting Psyched About Memes in the Psychology Classroom

Introduction: Internet memes are a ubiquitous part of internet culture and a common communication tool among students. Because they are a good medium for expressing ideas and concepts in a concise and fun manner, memes are a potentially valuable tool for teaching and engaging students. Statement of the Problem: Instructors may not know how to use memes in classroom assignments or activities to support learning objectives. Literature Review: Students finding or creating their own class-related content is an empirically-supported way to enhance learning. Instructors can enhance learning by using multimedia approaches (pictures/videos in addition to words), which is a good fit for the use of memes. We include examples of ways that memes have already been used in psychology classrooms. Teaching Implications: Incorporating meme assignments or activities in the classroom could be beneficial. Conclusion: We describe how students can explain or generate memes that illustrate concepts related to course material. Instructions and supporting information and resources, as well as calls for research into the effectiveness of the use of memes in the classroom, are included