2,559 research outputs found
A reinterpretation of the Yalta Conference with particular emphasis on the role of Franklin D. Roosevelt
We know that World War II did not bring the lasting peace everyone hoped and assumed it would bring. The United States, along with other Western powers, now finds itself in a seeming life and death struggle with the Soviet Union and its satellites, with both sides arming for another possible global war. Everyday brings new and deeper problems for the United States and the West in both Asia and Europe. The Yalta Conference was the culminating and most far-reaching of all the conferences of Roosevelt, Stalin, and Churchill. At Yalta the basic decisions were made regarding what these leaders intended to do with the world that would be in their hands as a result of their nations’ defeat of Germany and Japan. Thus, what was decided at Yalta is greatly connected with the state of the world today
XatA, an AT-1 autotransporter important for the virulence of Xylella fastidiosa Temecula1.
Xylella fastidiosa Temecula1 is the causative agent of Pierce's disease of grapevine, which is spread by xylem-feeding insects. An important feature of the infection cycle is the ability of X. fastidiosa to colonize and interact with two distinct environments, the xylem of susceptible plants and the insect foregut. Here, we describe our characterization of XatA, the X. fastidiosa autotransporter protein encoded by PD0528. XatA, which is classified as an AT-1 (classical) autotransporter, has a C-terminal β-barrel domain and a passenger domain composed of six tandem repeats of approximately 50 amino acids. Localization studies indicate that XatA is present in both the outer membrane and membrane vesicles and its passenger domain can be found in the supernatant. Moreover, XatA is important for X. fastidiosa autoaggregation and biofilm formation based on mutational analysis and the discovery that Escherichia coli expressing XatA acquire these traits. The xatA mutant also shows a significant decrease in Pierce's disease symptoms when inoculated into grapevines. Finally, X. fastidiosa homologs to XatA, which can be divided into three distinct groups based on synteny, form a single, well-supported clade, suggesting that they arose from a common ancestor
Learning to identify reduced passive verb phrases with a shallow parser
Journal ArticleOur research is motivated by the observation that NLP systems frequently mislabel passive voice verb phrases as being in the active voice when there is no auxiliary verb (e.g., "The man arrested had a long record"). These errors directly impact thematic role recognition and NLP applications that depend on it. We present a learned classifier that can accurately identify reduced passive voice constructions in shallow parsing environments
The CP properties of the lightest Higgs boson with sbottom effects
In the framework of the recently proposed gluino-axion model, using the
effective potential method and taking into account the top-stop as well as the
bottom-sbottom effects, we discuss the CP--properties of the lightest Higgs
boson, in particular its CP--odd composition, which can offer new opportunities
at collider searches. It is found that although the CP-odd composition of the
lightest Higgs increases slightly with the inclusion of the sbottom effects, it
never exceeds %0.17 for all values of the renormalization scale Q ranging from
top mass to TeV scaleComment: 24 pp, 12 eps fig
Metode Pembelajaran Muthala’ah Dalam Meningkatkan Kemampuan Maharah Qiraah Santri Pondok Pesantren Modern Al-Kinanah Jambi
Penelitian ini bertujuan untuk untuk mengetahui metode pembelajaran apa yang diterapkan oleh guru muthala’ah dalam meningkatkan kemampuan maharah qiraah santri di pondok pesantren modern Al-Kinanah Jambi. Hasil penelitian menunjukkan bahwa 1). Metode pembelajaran yang digunakan oleh guru muthala’ah dibagi menjadi tiga metode. Metode pertama yaitu metode hikayatul qhosiroh guru menjelaskan materi dengan bercerita, Metode kedua yaitu metode tajmi guru meminta siswa untuk menyusun kata acak menjadi sebuah kalimat sempurna. Metode ketiga yaitu metode muwa’imah/muwafiqah adalah melatih penglihatan dan melakukan latihan membaca cepat. Hasil dari penggunaan metode ini, para siswa sedikit banyak dapat memahami materi bahasa Arab. 2). Kendala guru dalam penggunaan metode ini yaitu: (a) latar belakang siswa yang berbeda-beda, (b) siswa kesulitan memaknai kosa kata baru, (c) siswa mengantuk dan tertidur, (d) kurangnya minat belajar siswa (e) siswa yang masih terbata-bata dalam membaca kalimat bahasa Arab, (f) guru sulit mendapatkan perhatian siswa,(g) guru sulit menyatukan pemahaman siswa, (h) metode guru yang kurang efektif dan (i) keaktifan guru dalam mengajar juga kurang. 3). Upaya guru dalam mengatasi kendala penggunaan metode ini adalah sebagai berikut: (a) menghidupkan suasana belajar yang asik dan kondusif, (b) memberikan inovasi pada metode pembelajaran, (c) melakukan latihan membaca kalimat bahasa Arab,(d) mencari persamaan kosa kata yang lebih mudah dipahami siswa (e) memberikan sanksi kepada siswa yang mengantuk dan tertidur (f) memberikan pelajaran tambahan diluar pembelajaran kelas dan (g) komunikasi yang baik
Sneutrino Mass Measurements at e+e- Linear Colliders
It is generally accepted that experiments at an e+e- linear colliders will be
able to extract the masses of the selectron as well as the associated
sneutrinos with a precision of ~ 1% by determining the kinematic end points of
the energy spectrum of daughter electrons produced in their two body decays to
a lighter neutralino or chargino. Recently, it has been suggested that by
studying the energy dependence of the cross section near the production
threshold, this precision can be improved by an order of magnitude, assuming an
integrated luminosity of 100 fb^-1. It is further suggested that these
threshold scans also allow the masses of even the heavier second and third
generation sleptons and sneutrinos to be determined to better than 0.5%. We
re-examine the prospects for determining sneutrino masses. We find that the
cross sections for the second and third generation sneutrinos are too small for
a threshold scan to be useful. An additional complication arises because the
cross section for sneutrino pair to decay into any visible final state(s)
necessarily depends on an unknown branching fraction, so that the overall
normalization in unknown. This reduces the precision with which the sneutrino
mass can be extracted. We propose a different strategy to optimize the
extraction of m(\tilde{\nu}_\mu) and m(\tilde{\nu}_\tau) via the energy
dependence of the cross section. We find that even with an integrated
luminosity of 500 fb^-1, these can be determined with a precision no better
than several percent at the 90% CL. We also examine the measurement of
m(\tilde{\nu}_e) and show that it can be extracted with a precision of about
0.5% (0.2%) with an integrated luminosity of 120 fb^-1 (500 fb^-1).Comment: RevTex, 46 pages, 15 eps figure
Top-quark physics in six-quark final states at the Next Linear Collider
The processes of six-quark production with one pair are studied by
means of a complete tree-level electroweak calculation. The top-quark signal is
examined: the importance of electroweak backgrounds, of the order of 10% above
the threshold and of about 30% of the purely electroweak signal at
threshold, is further stressed by studying the dependence of the cross-section
at threshold on the Higgs mass in the range between 100 GeV and 185 GeV, and
finding variations of the order of 10%. In the study of some event-shape
variables, a strong effect of initial-state radiation is found, in particular
for the thrust distribution, which is studied for several centre-of-mass
energies at the TeV scale. The effectiveness of cuts on the thrust for
isolating QCD backgrounds, as pointed out by some authors, is confirmed also in
the presence of electroweak backgrounds and initial-state radiation.Comment: LaTeX (using elsart.sty), 17 pages, 9 figures include
Bounds on the Higgs-Boson Mass in the Presence of Non-Standard Interactions
The triviality and vacuum stability bounds on the Higgs-boson mass are
revisited in the presence of new interactions parameterized in a
model-independent way by an effective lagrangian. When the scale of new physics
is below 50 TeV the triviality bound is unchanged but the stability lower bound
is increased by 40-60 GeV. Should the Higgs-boson mass be close to its current
lower experimental limit, this leads to the possibility of new physics at the
scale of a few TeV, even for modest values of the effective lagrangian
parameters.Comment: 5 pages, 2 figures, RevTex, submitted to PR
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