Fermionisation of the Spin-S Uimin-Lai-Sutherland Model: Generalisation of Supersymmetric t-J Model to Spin-S

The spin-1 Uimin-Lai-Sutherland (ULS) isotropic chain model is expressed in terms of fermions and the equivalence of the fermionic representation to the supersymmetric t-J model is established directly at the level of Hamiltonians.The spin-S ULS model is fermionized and the Hamiltonian of the corresponding generalisation of the t-J model is written down.Comment: 16 page

Conference on immigration law and policies.

Conference held on 24 February 2001 (Saturday) in Council Chamber, 8/F, Meng Wah Complex, University of Hong Kong.Caption title.published_or_final_versionStrugging with the right to family life Athena Liu Liu, AthenaIntegration or segregation : the political attitude of new arrivals Robert Chung Chung, RobertHousing and welfare services for new arrivals from China : inclusion or exclusion? Ernest Chui Chui, ErnestImmigration and health care Chow Chun Bong Chow, Chun- bongQuota system and one way permit Ho Hei Wah Ho, Hei-wahDiscretion and immigration control Philip Dykes SC Dykes, Philip S. C.Immigration law and discretionary powers T K Lai Lai, T. K.Inherent contradictions and inconsistencies in the Immigration Ordinance S H Kwok Kwok, S. H.Due process and aliens Paul Harris Harris, PaulThe cultural politics of mainland Chinese migration to Hong Kong Khun Eng Kuah-Pearce Kuah-Pearce, Khun En

LAI determination in dune vegetation: a comparison of different techniques

Research was conducted in the nature reserve De Westhoek (De Panne, Belgium) in order to determine leaf-area-index (LAI) in different dune vegetation types by both direct (destructively) and indirect optical measurements. The destructive LAI determination was conducted in herbaceous and shrub vegetation types. It was found that the LAI of herbaceous vegetation ranges between 0.87 and 4.60 and the LAI of shrub vegetation between 2.25 and 3.58. Ground-based optical determination of LAI was only conducted in the shrub vegetation, by means of the SunScan (Delta-T Devices Ltd, Cambridge, UK). This indirect LAI method systematically overestimated direct LAI. Another applied optical method is the hemispherical photography (Nikon Coolpix 5000 camera). Airborne remote sensing data are used to establish a relationship between direct LAI and some vegetation indices. Based on the above established relationship a map of the horizontal LAI distribution in the nature reserve De Westhoek will be produced

Antigenic variation among murine coronaviruses: evidence for polymorphism on the peplomer glycoprotein, E2.

A panel of 28 monoclonal antibodies (MAb) against the structural proteins of murine hepatitis virus-4, strain JHM (MHV-4) was used in three antigen binding assays to determine the extent of antigenic homology among six strains of murine coronaviruses. The antigenic determinants studied were highly conserved on the E1 glycoproteins and nucleocapsid (N) proteins of all strains tested. In contrast, antigenic polymorphism was observed among the E2 glycoproteins. Of three previously described antigenic determinants against which neutralizing antibodies are directed, only one, termed A(E2), was conserved on all strains. Antigenic site B(E2) was found only on the strongly neurotropic MHV-4 and site C(E2) was present on the virulent MHV-4 and MHV-3 (hepatotropic) strains, but absent on the weakly pathogenic MHV-A59, MHV-1 and MHV-S strains. Four non-neutralizing antibodies against at least one topographically distinct antigenic determinant, which we previously designated D(E2), gave binding patterns consistent with two distinct sites. One of these was present on all MHV strains tested and the other was present on all strains except MHV-S. These non-neutralizing antigenic sites were redesignated E(E2) and D(E2) respectively

T A M A N W I S A T A A I R P A N A S K A L I A N G E T W O N O S O B O

Taman rekreasi adalah tempat yang digunakan orang pada umumnya untuk melakukan aktifitas yang bersifat menghibur / wisata. Mereka ingin mendapatkan hiburan untuk menyegarkan pikiran mereka setelah jenuh dengan rutinitas yang mereka jalani. Ada banyak macam jenis taman rekreasi. Dalam dunia pariwisata, umumnya dikenal beberapa jenis taman rekerasi, yaitu : taman rekerasi Alam, Bangunan dan Buatan. Taman rekreasi alam memanfaatkan keindahan alam untuk menarik pengunjung seperti, Gunung, Hutan / Hutan Lindung, Danau, Pantai, Laut, Sungai. Kemudian contoh taman rekreasi bangunan adalah Bangunan Bersejarah seperti Museum, Candi, Monumen, Benteng. Lalu yang termasuk taman wisata buatan adalah Kebun Binatang, Taman Buah, Taman Bunga, Kolam Renang (Water Boom, Water Park), Taman Mini, Taman Impian, dan lain-lai

Flavor changing scalar couplings and tγ(Z)t\gamma(Z) production at hadron colliders

We calculate the contributions of the flavor changing scalar ($FCS$) couplings arised from topcolor-assisted technicolor ($TC2$) models at tree-level to the $t\gamma$ and $tZ$ production at the Tevatron and $LHC$ experiments. We find that the production cross sections are very small at the Tevatron with $\sqrt{s}=1.96TeV$, which is smaller than 5 fb in most of the parameter space of $TC2$ models. However, the virtual effects of the $FCS$ couplings on the $t\gamma(Z)$ production can be easily detected at the $LHC$ with $\sqrt{s}=14TeV$ via the final state $\gamma l\bar{\nu}b$ ($l^{+}l^{-}l\bar{\nu}b$).Comment: 10 pages,5 figure

Bobot minimal arborescence dari graph berarah dan aplikasinya

Graph berara,h G = ( V,E ) memuat suatu arbores¬cence /—= ( V,T ) dengan TCE dan mempunyai bobot w(T) Arborescence adalah suatu tree (pohon) yang mempunyai satu akar dan setiap titik lainnya (berbeda dengan akar) di da¬lam-G dapat dicapal hanya dengan satu lintasan saja lai dari akar tersebut. Melalui definisi dan teorema akan dicari suatu penyelesaian masalah untuk mendapatkan arbo rescence dengan bobot minimal. Serta dipakai suatu algorit ma dan flow chart untuk memahami langkah-langkah penyele¬saianny

Reprise Editor's Note

Introductio

Biomass accumulation and energy conversion efficiency in aromatic rice genotypes

A field experiment was conducted to evaluate photosynthetic efficiency along with different growth parameters of aromatic rice genotypes. Forty genotypes including three non-aromatic checks exhibited enormous variations for leaf area index (LAI), crop growth rate (CGR), relative growth rate (RGR), net assimilation rate (NAR), grain yield, total dry matter, harvest index and photosynthetic efficiency or energy use efficiency (Emu) at panicle initiation and heading stages. Minimum LAI-value was 0.52 in Khazar at PI stage and maximum was 4.91 in Sakkor khora at heading stage. The CGR-value was in the range of 4.80-24.11 g m(-2) per day. The best yielder BR39 produced grain of 4.21 t ha(-1) and the worst yielder Khazar gave 1.42 t ha(-1). Total dry matter (TDM) yield varied from 4.04 to 12.26 t ha(-1) where genotypes proved their energy use efficiency a range between 0.58 to 1.65%. Emu showed a significant positive relation with TDM (r=0.80(**)), CGR (r=0.72(**)) and grain yield (r=0.66(**)). A negative correlation was established between TDM and harvest index and LAI and RGR. Path analysis result showed that NAR at heading stage exerted highest positive direct effect (0.70) on Emu