The space of tropically collinear points is shellable

The space T_{d,n} of n tropically collinear points in a fixed tropical projective space TP^{d-1} is equivalent to the tropicalization of the determinantal variety of matrices of rank at most 2, which consists of real d x n matrices of tropical or Kapranov rank at most 2, modulo projective equivalence of columns. We show that it is equal to the image of the moduli space M_{0,n}(TP^{d-1},1) of n-marked tropical lines in TP^{d-1} under the evaluation map. Thus we derive a natural simplicial fan structure for T_{d,n} using a simplicial fan structure of M_{0,n}(TP^{d-1},1) which coincides with that of the space of phylogenetic trees on d+n taxa. The space of phylogenetic trees has been shown to be shellable by Trappmann and Ziegler. Using a similar method, we show that T_{d,n} is shellable with our simplicial fan structure and compute the homology of the link of the origin. The shellability of T_{d,n} has been conjectured by Develin in 2005.Comment: final version, minor revision, 15 page

THERMAL SOLUTION - EXPANDED HEATSINK

The concept is to give a heatsink fin that can transform geometry ability. The purpose is to enlarge the heatsink size to increase the heat dissipated area and increase the flow space to improve flow convention efficiency. Thermal part o Fin: a flexible or adjustable fin structure that can increase the width of Air flow space from D to (D+½ d), which would help decrease the flow speed to reduce the noise. o Fan: Where fins transform, and the air gap between the desk and NB bottom surface (bottom air inlet) is also increased, the fan can suck air with better efficiency and noise will be lower at the same fan speed. ME part o The transformation structure is designed on thermal fin and D‐cover o The transformation is triggered by an ambient sensor that detects the system temperature. 1) System temperature is high and over the T,limit 2) System still has the margin that can be triggered CPU/GPU overclocking o D‐cover (bottom fin was fixed together) and was fixed at C‐ cover by another side. D‐cover with a bottom fin can be pushed up and down by a small motor. PCA part o Keyboard use Hotkey or special button to control Expand FIN. o When detect Over temperature event to do some actions

The Kinsloe Site (41GG3) on Rabbit Creek in the mid-Sabine River Basin, Gregg County, Texas

The Kinsloe site (41GG3) is on Rabbit Creek in the middle Sabine River basin a few miles north of Kilgore, Texas. The site is ca. 2 km west of the confluence of Rabbit Creek and the Sabine River. This site is one of a number of late 17th to early 19th century Caddo sites that have been associated with the Kinsloe focus or phase first recognized by Buddy C. Jones (1968; see also Fields and Gadus 2012:639- 643; Perttula 2007), and affiliated with Nadaco Caddo groups. Jones (1968:29-47 and Figure 3) provides a detailed summary of the local avocational archaeological work that had been done at the Kinsloe site, and mentions surface collections he had obtained from several areas of the site; these surface collections are now at the Gregg County Historical Museum in Longview, Texas (see below). The Kinsloe site was found by Magnolia employees in 1931 when an area of the Rabbit Creek floodplain and an alluvial fan/terrace was graded for the construction of pipelines and oil storage tanks (April 1931 letter from J. E. Pearce to A. T. Jackson, on file at TARL). A Mr. E. A. Fox, one of the employees, excavated 19 ancestral Caddo burials from the site by 1940, and several other individuals apparently excavated as many as 11 more burials there by that time. The collections obtained by Mr. Fox were later examined by Jones (1968) as part of his Master’s thesis on Kinsloe focus/phase sites in East Texas. Jones also defined four site areas, A-D, with the Historic Caddo burials in Area C on an alluvial fan, and Areas A, B, and D to the west, north, and south; Area A is on the alluvial fan, Area B is on a floodplain rise, and Area D is on a prominent alluvial terrace ca. 150 m south of Area C (see Jones 1968:Figure 3). However, recent investigations of the records and collections at the Texas Archeological Research Laboratory at The University of Texas at Austin (UT-TARL) indicate that there had been work done at the Kinsloe site in 1937 and 1940 that Buddy C. Jones had not been aware of and had not mentioned in his 1968 Master’s thesis. I will discuss these investigations in the remainder of this article, as well as the ancestral Caddo material culture remains and European trade goods recovered in these investigations

Penghematan Energi Pada Industri Semen Studi Kasus : Pemasangan Vsd's Pada Fan

Industri semen merupakan salah satu industri yang digolongkan sebagai industriyang boros mengkonsumsi energi, karena dalam proses produksi mengkonsumsienergi cukup besar setara dengan 25 s/d 35 % dari biaya total produksi. Sejalandengan semakin berkurangnya cadangan bahan bakar fosil yang tidak dapatdiperbaharui (non-renewable energy), penghematan energi melalui efisiensipenggunaan energi pada proses produksi menjadi suatu keharusan yang tidak dapatdihindari.Dalam penelitian sebelumnya[1], Penulis telah melakukan Feasibility Studyterhadap pemasangan VSD di Fan, yang menunjukkan kemungkinan penghematanenergi yang cukup besar. Dalam penelitian ini, unjuk kerja dilapangan secara nyatatelah didapatkan bahwa pemasangan inverter atau VSD'S pada Fan yang digunakandidalam proses produksi Industri Semen, mampu menghemat penggunaan energisebesar 499,0464 MWH pertahun, dan nilai ini setara dengan penurunan emisi gasCO2 sebesar 361.309,594 Ton CO2/Tahun

QSO 0130-4021: A third QSO showing a low Deuterium to Hydrogen Abundance Ratio

We have discovered a third quasar absorption system which is consistent with a low deuterium to hydrogen abundance ratio, D/H = 3.4 times 10^-5. The z ~ 2.8 partial Lyman limit system towards QSO 0130-4021 provides the strongest evidence to date against large D/H ratios because the H I absorption, which consists of a single high column density component with unsaturated high order Lyman series lines, is readily modeled -- a task which is more complex in other D/H systems. We have obtained twenty-two hours of spectra from the HIRES spectrograph on the W.M. Keck telescope, which allow a detailed description of the Hydrogen. We see excess absorption on the blue wing of the H I Lyman alpha line, near the expected position of Deuterium. However, we find that Deuterium cannot explain all of the excess absorption, and hence there must be contamination by additional absorption, probably H I. This extra H I can account for most or all of the absorption at the D position, and hence D/H = 0 is allowed. We find an upper limit of D/H < 6.7 times 10^-5 in this system, consistent with the value of D/H ~ 3.4 times 10^-5 deduced towards QSO 1009+2956 and QSO 1937-1009 by Burles and Tytler (1998a, 1998b). This absorption system shows only weak metal line absorption, and we estimate [Si/H] < -2.6 -- indicating that the D/H ratio of the system is likely primordial. All four of the known high redshift absorption line systems simple enough to provide useful limits on D are consistent with D/H = 3.4 +/- 0.25 times 10^-5. Conversely, this QSO provides the third case which is inconsistent with much larger values.Comment: 18 pages, 5 figures, submitted to Ap

The gravity field of topography buried by sediments

The gravity field over topography in the northern Indian Ocean that was completely buried by sediments of the Bengal Fan was investigated to understand the effect of sedimentation on the continental gravity field. An isopach map made from the seismic reflection and refraction in the Bay of Bengal shows two prominent N-S trending features in the basement topography. The northernmost portion of the Ninetyeast Ridge is totally buried by sediments north of 10 deg N. The other buried ridge trends roughly N-S for 1400 km at 85 deg E to the latitude of Sri Lanka and then curves toward the west. It has basement relief up to 6 km. Two free air gravity anomaly profiles across the region show a strong gravity low over the 85 deg E ridge, while the Ninetyeast Ridge shows a gravity high

Breach procedure for axillary hyperhidrosis.

Dear Editor, We read with interest the communication on ‘A simple and practical method for axillary osmidrosis resection’ by Liu X, Mao T, Lei Z, Fan D appeared on JPRAS 2009.1 We found the description of the technique very useful with the support of intra-operative pictures. The use of artery clips to evert the skin flaps can be easily reproduced. However it is surprising that the Authors did not consider and mention in the References a paper by Mr N Breach appeared in the Annals of the Royal College of Surgeons of England in the late 70ies,2 when he was Senior Registrar at the Plastic Surgery Department of the Queen Victoria Hospital, East Grinstead, UK. Since then this latter procedure for surgical treatment of axillary hyperhidrosis has been widely adopted, [3], [4] and [5] especially in the Western world and in the UK where is known as the ‘Breach’ procedure. The main difference with the technique described in the paper by Liu X et al. consists in the number of incisions that has now been minimized

Euler characteristic of coherent sheaves on simplicial torics via the Stanley-Reisner ring

We combine work of Cox on the total coordinate ring of a toric variety and results of Eisenbud-Mustata-Stillman and Mustata on cohomology of toric and monomial ideals to obtain a formula for computing the Euler characteristic of a Weil divisor D on a complete simplicial toric variety in terms of graded pieces of the Cox ring and Stanley-Reisner ring. The main point is to use Alexander duality to pass from the toric irrelevant ideal, which appears in the computation of the Euler characteristic of D, to the Stanley-Reisner ideal of the fan, which is used in defining the Chow ring. The formula also follows from work of Maclagan-Smith.Comment: 9 pages 1 figur