Conjugacy classes of p-cycles of type D in alternating groups

We classify the conjugacy classes of p-cycles of type D in alternating groups. This finishes the open cases in arXiv:0812.4628. We also determine all the subracks of those conjugacy classes which are not of type D.Comment: Second paragraph of subsection 2.2 rewritten. 4-th sentence of subsection 2.4 rewritten. More explanations added in Remark 2.4. Lemma 2.5 and Corollary 2.7 added. Appendix removed and put it as Remark 3.1. Remark 3.2 (former 3.1) reorganized. References: [Da], [EGSS], [H], [IS] added, [GPPS] removed. Communications in Algebra (2014

Effective photon mass and exact translating quantum relativistic structures

Using a variation of the celebrated Volkov solution, the Klein-Gordon equation for a charged particle is reduced to a set of ordinary differential equations, exactly solvable in specific cases. The new quantum relativistic structures can reveal a localization in the radial direction perpendicular to the wave packet propagation, thanks to a non-vanishing scalar potential. The external electromagnetic field, the particle current density and the charge density are determined. The stability analysis of the solutions is performed by means of numerical simulations. The results are useful for the description of a charged quantum test particle in the relativistic regime, provided spin effects are not decisive

M-learning Application For Computer Networking Subjects

Nowadays, mobile application, called mobile learning, is widely used among academic staff to help them in the process of teaching and learning at university. This research proposed the use of mobile learning in computer network subjects, particularly computer network and security, to facilitate the ease of access to the source of material and evaluation. Based on the questionnaire that distributed to the students, 75% respondents found this application is easy to use, attractive, and helping them to understand the content of subjects

Pengaruh Herbisida Aminosiklopilaklor terhadap Keterjadian Partenokarpi pada Tanaman Kelapa Sawit (Elaeis Guineensis Jacq) Menghasilkan dan Daya Kendalinya terhadap Gulma

Penelitian bertujuan untuk mengetahui pengaruh herbisida aminosiklopilaklor terhadap keterjadian partenokarpi pada tanaman kelapa sawit menghasilkan dan untuk mengetahui efektivitas herbisida tersebut dalam mengendalikan gulma. Penelitian disusun dengan menggunakan Rancangan Kelompok Teracak Sempurna yang terdiri atas 6 perlakuan yaitu herbisida aminosiklopilaklor dengan dosis 50, 100, 200 g/ha, herbisida pembanding aminopyralid+triklopir 384+216 g/ha, penyiangan mekanis, dan kontrol, dengan 4 ulangan. Homogenitas ragam diuji dengan uji Bartlet, aditivitas data diuji dengan uji Tukey, dan perbedaan nilai tengah diuji dengan Uji Beda Nyata Terkecil (BNT) pada taraf 5 %. Hasil penelitian menunjukkan bahwa : (1) Herbisida aminosiklopilaklor dosis 50, 100, dan 200 g ha-1 dan herbisida pembanding aminopiralid+triklopir 384+216 g ha-1 yang digunakan dalam pengendalian gulma pada pertanaman kelapa sawit menghasilkan belum mampu memberikan informasi yang pasti mengenai partenokarpi pada buah kelapa sawit sampai dengan 12 minggu setelah aplikasi. Hal ini disebabkan tidak semua tanaman kelapa sawit mengeluarkan tandan/bunga baru sawit selama penelitian berlangsung, (2) herbisida aminosiklopilaklor dosis 50,100, dan 200 g ha-1mampu mengendalikan pertumbuhan gulma total pada pertanaman kelapa sawit sampai dengan 8 MSA, (3) herbisida aminosiklopilaklor dosis 50, 100, 200 g ha-1dan aminopiralid +triklopir 384+216 g ha-1 mampu mengendalikan pertumbuhan gulma daun lebar total hingga 12 MSA dan mampu mengendalikan gulma golongan rumput hingga 8 MSA tetapi tidak mampu mengendalikan pertumbuhan gulma golongan teki, dan (4) herbisida aminosiklopilaklor dosis 50, 100, 200 g ha-1dan aminopiralid+ triklopir 384+216 g ha-1 mampu mengendalikan gulma dominan Cleome rutidospermae hingga 12 MSA, Axonopus compressus hingga 8 MSA dan Digitaria ciliaris hingga 4 MSA

Charge inhomogeneities due to smooth ripples in graphene sheets

We study the effect of the curved ripples observed in the free standing graphene samples on the electronic structure of the system. We model the ripples as smooth curved bumps and compute the Green's function of the Dirac fermions in the curved surface. Curved regions modify the Fermi velocity that becomes a function of the point on the graphene surface and induce energy dependent oscillations in the local density of states around the position of the bump. The corrections are estimated to be of a few percent of the flat density at the typical energies explored in local probes such as scanning tunnel microscopy that should be able to observe the predicted correlation of the morphology with the electronics. We discuss the connection of the present work with the recent observation of charge anisotropy in graphene and propose that it can be used as an experimental test of the curvature effects.Comment: 9 pages, 5 figures. v2: Abstract and discussion about experimental consequences expande

Conductance of 1D quantum wires with anomalous electron-wavefunction localization

We study the statistics of the conductance $g$ through one-dimensional disordered systems where electron wavefunctions decay spatially as $|\psi| \sim \exp (-\lambda r^{\alpha})$ for $0 <\alpha <1$, $\lambda$ being a constant. In contrast to the conventional Anderson localization where $|\psi| \sim \exp (-\lambda r)$ and the conductance statistics is determined by a single parameter: the mean free path, here we show that when the wave function is anomalously localized ($\alpha <1$) the full statistics of the conductance is determined by the average $$ and the power $\alpha$. Our theoretical predictions are verified numerically by using a random hopping tight-binding model at zero energy, where due to the presence of chiral symmetry in the lattice there exists anomalous localization; this case corresponds to the particular value $\alpha =1/2$. To test our theory for other values of $\alpha$, we introduce a statistical model for the random hopping in the tight binding Hamiltonian.Comment: 6 pages, 8 figures. Few changes in the presentation and references updated. Published in PRB, Phys. Rev. B 85, 235450 (2012

Biological activities specified by antibiotic resistance plasmids

Bacteria can display resistance to a wide spectrum of noxious agents and environmental conditions, and these properties are often mediated by genes located on extrachromosomal DNA elements called plasmids. Replication, vertical and horizontal transmission and evolution of these elements are discussed, and examples of the genes responsible for the resistance phenotypes are given. Selective forces that drive the evolution of new combinations of bacterial properties of particular importance in clinical situations are analyse

Biological activities specified by antibiotic resistance plasmids

Bacteria can display resistance to a wide spectrum of noxious agents and environmental conditions, and these properties are often mediated by genes located on extrachromosomal DNA elements called plasmids. Replication, vertical and horizontal transmission and evolution of these elements are discussed, and examples of the genes responsible for the resistance phenotypes are given. Selective forces that drive the evolution of new combinations of bacterial properties of particular importance in clinical situations are analyse