24,226 research outputs found
Band Structure of Nuclear Levels and Pairing Correlation Interactions
No full textThe modern theory of superconductivity applied to a statistical model of
nuclei predicts the phase transition energy all at 2.73 Mev or so for a wide
range of mass number. This transition energy curve is identified with cne of
the curves which were found by Sakai from a plot of the number of levels
against the excitation energy
Angular Momentum Distributions in the Thomas-Fermi and Thomas-Fermi-Dirac Models of the Atom
No full textThe angular momentum distributions in the Thomas-Fermi and Thomas-Fermi-Dirac
models of the atom are calculated by an ™i mproved method proposed previously.
The maximum energy (El),== for a given orbital angular momentum state is not
neglected and is treated as an eigenvalue by the WKB method.
The effective central field potentials in terms of the universal approximate
Thomas-Fermi function proposed by Latter are utilized. The determination of the
maximum energy (El),n,, and, therefore, the number of electrons rzl for a given
angular momentum state 2 is greatly facilitated by the term values computed by
Latter; The calculated angular momentum distributions are checked with the dia-grams
of term values against Z given in the Latter ™s paper to assure that our.pro-posed
method prouduces no appreciable error. .
Comparing with the empirical data, we then tind that the accuracy of the
Thomas-Fermi-Dirac model is far better than that of the Thomas-Fermi model. The
prediction of the first appearance of the s, p, d and f electrons by the Thomas-Fermi-
Dirac model is almost perfectly exact
Predicting subcellular localization of proteins for Gram-negative bacteria by support vector machines based on n-peptide compositions
No full textAngular Momentum Distributions in the Atomic Nuclei
No full textThe problem of how many protons (neutrons) of a given orbital angular mo-mentum
Itr are to be found in a nucleus of a given proton number Z (neutron
number N) is reinvestigated by means of the improved Thomas-Fermi method.
Three kinds of nuclear models are calculated: The types of potentials chosen arc
(i) square well potential, (ii)-the Green™s potential, and (iii) the Green™s potential
plus 45 times the Thomas-Frenkel spin orbit term. The parameters involved in the
potentials are adopted from the paper of Hwang and Yang, which may exactly re-produce
the nuclear radii, trends of binding energies, and location of 3s and 4s
maxima in the neutron scattering cross section. The eigenvalues calculated by Green
are used to simplify the procedure of calculation. The results are then compared
with the empirical data compiled by Klinkenbeig. For the last type of potential,
the calculation is almost perfectly exact. The first appearance of particles of the
next higher angular momentum is almost exact for each model. The puzzle in the
Yang™s treatment of the first appearance problem is then solved. The crigin of the
appearance of magic numbers in the Yang s calculation is explained in the light of
the present theory
Satsuma careocaecum Wu & Hwang & Lin 2008, SP. NOV.
No full textSATSUMA CAREOCAECUM SP. NOV. (FIGS 15, 16) Material examined Type specimen: Holotype: TMMT 0603 (from type locality, dry shell, tissue in alcohol). Seventeen paratypes: all from type locality, TMMT 0651 (dry shell, tissue in alcohol, dissected); TMMT 0622–0624, TMMT 0646–0650 (dry shell, tissue in alcohol); BMNH 20060769–20060771, ANSP 413686 (N = 3), SMF 329393–329394 (dry shell). Type locality Guanziling, Tainan County, southern Taiwan (Fig. 1, Table 1). Diagnosis Shell and soft body white with grey pedal stripe; base expanded; penial caecum absent. Etymology L. careo: lack; caeca: caecum, referring to the lack of a penial caecum. Description Shell (Fig. 15): Dextral, conical, thin, rigid, medium sized. Apex obtuse. Whorls inflated. Periphery bluntly angulated to arc-like. Base expanded. Pre-apertural constriction behind outer and inferior lips present. Surface sheen with spiral striae. Shell colour white or white milky. Periostracum fine. Aperture diagonal, ovate-lunate. Peristome thin, expanded, reflected. Inferior lip curved downwards. Columellar lip oblique, reflected covering most of umbilicus. Junction of columellar lip and inferior lip roundly angulated. Band or stain: Polymorphism exists in this taxon. Most individuals exhibit a red-brown to black-purple stain around the umbilicus, columellar, columellar lip and apex; a sub-peripheral band is present in some specimens. The outer lip and inferior lip lack such coloration. Band formula = 0 0 0 0 0 0 0 0; 1 0 0 0 0 0 7 0; 1 0 0 0 5 0 0 0; 1 0 0 0 5 0 7 0. Reproductive system (Fig. 16): Bursa stalk long, almost slender. Proximal and middle vagina equally thin without conspicuous boundary between them, smooth externally, bearing 8–12 smooth, irregular strength folds internally; distal vagina one-third length of vagina. Flagellum long, tapering, with slender tip. Epiphallus with four weak pilasters inside. Penial caecum absent. Segment corresponding to penial caecum with three weak pilasters inside; then continued by slender tubule to penis. No verge or apparent internal constriction observed. Penis weak, gradually becoming robust towards atrium; middle penis with five clear, smooth, thin pilasters; distal penis with five strong, irregular, wiggly pilasters. Spermatophore (Fig. 16C) found in bursa stalk of figured individual (TMMT 0651); apical end partly digested in bursa copulatrix (not shown); tail tip remains in proximal vagina; cross-section at middle part (Fig. 16D) with three shallow valleculae and a projected fold. Six specimens were dissected. Distribution From Guanziling to Dongshan, northern Tainan County, southern Taiwan (Fig. 1, Table 1). Remarks The perching distance is typically from 3 m above ground to the canopy. Mature individuals often appear during winter (Fig. 15K). The absence of a penial caecum is the most distinct character among species of this species complex. Some Satsuma species, e.g. S. nux paiwanis (Kuroda, 1941), showed a reduced penial caecum (Chang, 1989), whilst others, e.g. Pancala batanica pancala (Schmacker & Boettger, 1891) and Pancala bacca (Pfeiffer, 1866 [1865]), showed a lack of a penial caecum with an apparent verge at insertion of the epiphallus (Chang, 1992; Hwang, 1995). A totally degenerated penial caecum as seen in S. careocaecum sp. nov. was not recorded in Satsuma. The species differs from S. lini in having a greater number of whorls, apical spot, sub-peripheral band and umbilicus spot; from S. hagiomontis sp. nov. and S. swinhoei sp. nov. in having bluntly angulated periphery; and from S. insignis in having thinner shell and regularly expanded body whorl.Published as part of Wu, Shu-Ping, Hwang, Chung-Chi & Lin, Yao-Sung, 2008, Systematic revision of the arboreal snail Satsuma albida species complex (Mollusca: Camaenidae) with descriptions of 14 new species from Taiwan, pp. 437-493 in Zoological Journal of the Linnean Society 154 (3) on pages 458-460, DOI: 10.1111/j.1096-3642.2008.00415.x, http://zenodo.org/record/544670
A Study of Hwang-Hai's Works
No full textA Study of Hwang-Hai's Works
Yi-jin Lin
Abstract
In the study, Hwang-hai's science fiction is researched with various definition by the east and western scholars. Ttracing back his life and writing experience results in the deep comprehension of his writing theme \ue2 the reflection upon science and civilization.
The research range includes Hwang-hai's writing art and skills of science fiction, such as fantastic time and space, characters and plots arrangements, and styles with the reference of western narrative theories, traditional literary theories, and science fiction theories.
Hwang-hai's writing pioneering creativities are the fairy tales characteristics between the children literature and adult. That can be helpful to distinguish Hwang-hai from other science fiction writers in Taiwan with the viewpoints of education and literary sociology.
The relative multi-pronged research can bring out not only the prospective future of science fiction in Taiwan but also the meaning of Hwang-hai's science fiction in our days, by the concepts of the literary artistic worth to social educational function from his works.
Keywords: Hwang-hai, Science fiction, Children Literature, Black Comedy
Dr. Lin Sun, CAU, March 2013
No full textThis video is a conversation with Dr. Lin Sun. Dr. Sun talks about an exhibit at the Woodruff Library titled "At The Boundary." Jordan Moore, AUC Woodruff Library, is the interviewer
The Importance of Proofs of Security for Key Establishment Protocols: Formal Analysis of Jan-Chen, Yang-Shen-Shieh, Kim-Huh-Hwang-Lee, Lin-Sun-Hwang, and Yeh-Sun Protocols
No full textDespite the importance of proofs in assuring protocol implementers about the security properties of key establishment protocols, many protocol designers fail to provide any proof of security. Flaws detected long after the publication and/or implementation of protocols will erode the credibility of key establishment protocols. We revisit recent work of Choo, Boyd, Hitchcock, & Maitland (2004) where they utilize the Bellare, Pointcheval, & Rogaway (2000) computational complexity proof model in a machine specification and analysis (using an automated model checker -- SHVT) for provably-secure key establishment protocol analysis. We then examine several key establishment protocols without proofs of security, namely: protocols due to Jan & Chen (2004), Yang, Shen, & Shieh (1999), Kim, Huh, Hwang, & Lee (2004), Lin, Sun, & Hwang (2000), and Yeh & Sun (2002). Using these protcols as case studies, we demonstrate previously unpublished flaws in these protocols. We may speculate that such errors could have been found by protocol designers if proofs of security were to be constructed, and hope this work will encourage future protocol designers to provide proofs of security
Phylogeography of Trochodendron aralioides (Trochodendraceae) in Taiwan and its adjacent areas
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