On the Lab. II building site

425 special CDSs in PCN033 (XLSX 29 kb

Implementasi Algoritma K-Nearest Neighbour Untuk Menentukan Nomor Klasifikasi Buku Studi Kasus: Perpustakaan Universitas Katolik Musi Charitas)

Classification of library books is important to allow visitors in search of a book. The classification system in the library of the Catholic University of Charity Musi using guide books dewey decimal classification (DDC). The problem in this research is the difficulty in determining the classification number of new books. By utilizing the methods of Information Retrieval (IR) or retrieval of information, so in this study will build an application program for classification of library books. The method will be used to classify the book library is a method of k-nearest neighbor (k-NN). The application program classification of library books is built with training data from library books Musi-Caritas Catholic University and the test data is a new book. Applications are made capable of classifying new library book

Geometric and Electronic Structures of Two-Dimensional SiC₃ Compound

Although graphene is an unconventional semimetallic nanosheet, the graphene-like binary sheets, such as BN and SiC with 1:1 stoichiometry, usually discard the semimetallicity. Here, we report the geometric structures and electronic properties of the two-dimensional SiC₃ sheet by the particle-swarm optimization method and density functional calculations. The unbiased global search reveals three lowest-energy structures for SiC₃ ones, all of which are Si-graphene hybrid honeycomb lattices with robust dynamical stabilities. Depending on the ordered arrangement of Si atoms, the SiC₃ sheets could be direct-band-gap semiconductors or zero-band-gap semimetals. More interestingly, the semiconducting SiC₃ sheet has a strong adsorption ability in the visible-light region, and the semimetallic one even possesses a distorted Dirac cone, which induces an anisotropic Fermi velocity. These rich electronic properties of SiC₃ nanosheets endow the system with promising applications in nanoelectronics and photovoltaics

Structural, Electronic, and Magnetic Properties of Adatom Adsorptions on Black and Blue Phosphorene: A First-Principles Study

Using first-principles calculations, we investigate the adsorption characteristics of alkali, alkaline-earth, nonmetallic, transition, and noble metal adatoms on phosphorene. The adsorption-induced tunable electronic structures are comparatively studied on two representative structures of phosphorene, i.e., black and blue phosphorus (P) nanosheets. Both black and blue P sheets exhibit good adsorption capability to foreign atoms, on which the binding energies of adatoms are stronger than on the BN, SiC, MoS₂, or graphene sheets. On the black P sheet, most adatoms prefer to adsorb on the hollow site, whereas for the blue P sheet, the favored adsorption sites are element-dependent. The majority of alkali, alkaline-earth, and transition-metal adatoms prefer the valley site, noble metal adatoms the hollow site, and nonmetallic adatoms the bridge and top sites instead. The semiconducting behaviors of phosphorene are modified by adatoms, which can cause p-type and n-type doping or induce midgap states into the P sheets. Moreover, surface adsorptions effectively functionalize the phosphorene system with versatile spintronic features: N-/P-decorated blue P sheets are half-metals, B-/Fe-decorated ones become bipolar-semiconductors, and Co-/Au-decorated blue and black P sheets turn into spin-gapless-semiconductors. Our work demonstrates that adatom adsorption is a feasible method of chemical functionalization of phosphorene, which results in peculiar electronic and magnetic properties for potential applications in nanoelectronics and spintronics

Quasi-Free-Standing Features of Stanene/Stanane on InSe and GaTe Nanosheets: A Computational Study

Two-dimensional tin and its iodized derivative, called stanene and stanane, are intriguing nanomaterials as quantum spin Hall (QSH) insulators. A recent experiment on stanene has found that the strong interaction from substrates will disturb the Dirac cones and cause a metallicity problem into stanene [F. Zhu et al. Nat. Mater. 2015, 14, 1020]. On the basis of van der Waals density functional calculations, we find that stanene and stanane can form commensurate van der Waals heterosheets with InSe and GaTe layers, which exhibit quasi-free-standing features with comparable spin–orbit coupling gaps to isolate values. Particularly, the supported stanane is still a large-gap QSH insulator, for which the substrates induce a tunable Rashba splitting that can be modulated by changing the interlayer distance of heterosheets. Our study demonstrates that layered III–VI chalcogenides are promising substrates for stanene and stanane, on which their intrinsics features can be well preserved for potential applications in topological materials and quantum manipulated devices

Density Functional Theory Study of the Silicene-like SiX and XSi₃ (X = B, C, N, Al, P) Honeycomb Lattices: The Various Buckled Structures and Versatile Electronic Properties

Using the density functional theory calculations, we systematically investigate the structures and properties of silicene-like SiX and XSi₃ (X = B, C, N, Al, P) hexagonal heterosheets. For the SiX systems, the SiP sheet favors a chairlike buckled structure akin to silicene, the SiB, SiN, and SiAl ones prefer the washboard-like buckling type, and the SiC sheet adopts the flat plane as graphene. The planarity is also favored in the XSi₃ sheets with X = B, C, Al, while the rests with X = N and P prefer the chairlike buckled structures. The energetic stabilities and mechanical properties are also investigated for these SiX and XSi₃ systems, and all the heterosheets are found to be stable. Unlike the semimetallic silicene, most of the SiX sheets are transformed to metals except for the SiC one with a wide band gap. For the XSi₃ systems, they can be metals, semimetals, or narrow-band gap semiconductors depending on the X elements. The BSi₃ and NSi₃ sheets exhibit metallic behaviors, which behave like the <i>p</i>-type or <i>n</i>-type doping into silicene. On the other hand, the AlSi₃ and PSi₃ ones turn to semiconductors with narrow indirect band gaps, which are dominated by the Si–Si and Si–X bonding/antibonding states. Of particular interests, we find the CSi₃ sheet maintains the zero-band gap semimetallicity of silicene, for which the <i>p</i>_<i>z</i> orbitals of Si and C atoms contribute to the linear Dirac-like bands near the Fermi level. The dynamical stabilities of the CSi₃, AlSi₃, and PSi₃ sheets are further examined by phonon calculations and ab initio molecular dynamics simulations, which confirm the robust stability of their free-standing states. Our studies demonstrate that the Si-related heterosheets have peculiar structures and properties, which have potential applications in the nanoelectronics and devices

Additional file 1: Table S1. of Molecular dynamics simulation and bioinformatics study on chloroplast stromal ridge complex from rice (Oryza sativa L.)

Identification of the PsaC and PsaD proteins from the NCBI database in this study. Sequence identity to OsPsaC and OsPsaD were listed. Table S2. Identification of the psaC and psaD genes from the NCBI database in this study. Sequence identity to OspsaC and OspsaD were listed. Figure S1. Phylogenetic tree of the PsaC proteins. The numbers associated with the branches are bootstrap values. Species names are color-coded as follows: green → land plants, light green → charophyte, blue → pteridophyta, light blue → bryophyta, purple → green algae, and black → cyanobacteria. The tree was deposited in TreeBASE under submission ID 18661. Figure S2. Phylogenetic tree of PsaD proteins. The numbers associated with the branches are bootstrap values. Species names are color-coded as follows: green → land plants, light green → bryophyta, black → phaeocystis, and blue → green algae. The tree was deposited in TreeBASE under submission ID 18661. Figure S3. Sequences alignments of the psaC genes. The sequences encoding R19 and D47 are highlighted. The color code indicates consistency between pairwise alignments (red: high, yellow: middle, blue: low). Figure S4. Sequences alignments of the psaD genes. The sequences encoding K62 and E103 are highlighted. The color code indicates consistency between pairwise alignments (red: high, yellow: middle, blue: low). Figure S5. Two docking models are superimposed with the MD model. Two salt bridges R19-E103 and D47-K62 are highlighted in their vdW representations. (DOCX 1149 kb

Data from continuous measurement of environmental UVB radiation in Ljubljana city (Central Europe).

<p>Panel A. Daily fluctuations in average UVB intensity for three selected months in the year with the lowest (1998) and in the year of the highest cumulative UVB radiation dose (2003). The dashed horizontal line indicates the average UVB intensity used for 6 hours exposure in <i>in vitro</i> experiments (Automatic Amp Station Ljubljana-Bežigrad). The city of Ljubljana is situated in Central Europe (latitude 46°3′5″ N, longitude 14°30′20″ E) at 291 m (954 ft) above sea level. Panel B. Average solar UVB hourly doses in spring (April), summer (July) and autumn (October) for the years 1998 and 2003. The dashed horizontal line indicates the dose (1800 J/m²) used in <i>in vitro</i> experiments. Zero values derived from days without solar irradiation are omitted.</p

Stereo Boron Nitride Nanoribbons with Junction-Dependent Electronic Structures from First-Principles

Using first-principles calculations, we investigate the structures and properties of stereo triwing boron nitride nanoribbons (TBNNRs). These triwing structures are constructed by three BN ribbon wings connected via the junctions, which have comparable thermodynamic stabilities to the planar nanoribbons. We find that the junctions play a primary role in the electronic structures of triwing nanoribbons, which cause versatile electronic and magnetic properties for the stereo structures. For the armchair edges, all the TBNNRs are semiconductors, for which the wide band gaps are opened between the occupied N p_<i>z</i> orbitals and unoccupied B p_<i>z</i> orbitals adjacent to the junctions, while for the zigzag ones, the TBNNRs can be metals or narrow-band gap semiconductors depending on the bonding characteristics of the junctions. The sp²-bonding junctions substantially reduce the band gaps, and the sp³-bonding junctions even induce the metallic behaviors. Moreover, due to the Stoner effect, an intrinsic spin-polarized phenomenon occurs when the sp³-bonding junction contains only the boron atoms. Accompanied by the spin-polarization, a metal-to-semiconductor transition takes place in these zigzag TBNNRs, which become semiconducting sp-electron ferromagnets. Our studies demonstrate that the electronic structures of triwing BN nanoribbons can be effectively tailored by the junctions, which leads to potential applications in the nanoscale electronics and spintronics

Detection of injuries induced in cyanobacteria after exposure to UVB radiation for six hours at an intensity of 0.51/m².

<p>Panel A. Percentage of TUNEL-positive <i>M. aeruginosa</i> cells after UVB radiation compared with control groups. (*<i>p</i><0.05, **<i>p</i><0.01, ***<i>p</i><0.001). Panel B. Photobleaching as a result of exposure to UVB radiation. Only MC non-producing PCC7005 Dark-acclimated cells show an increase in the percentage of cells showing no autofluorescence after UVB exposure, while a subpopulation (20%) of PAR-acclimated cells (PCC7806) almost immediately loses the signal. PAR-acclimated cells with no autofluorescence are more numerous in both MC producing strains, with an increased proportion 24 hours after exposure. Immediately after irradiation, only MC non-producing PCC7005 strain cells exhibit photobleaching (*<i>p</i><0.05, **<i>p</i><0.01, ***<i>p</i><0.001). Panel C. Increase in percentage of cytoskeleton positive <i>M. aeruginosa</i> cells after UVB exposure. The response of PAR-acclimated MC-non-producing strain PCC7005 to UVB irradiation is immediate, while both MC-producing strains FACHB905 and PCC7806 reach the maximum of cytoskeleton labeling in 24 hours subsequent to irradiation. Only a small percentage of Dark-acclimated cells show positive immunolabeling (*<i>p</i><0.05, **<i>p</i><0.01, ***<i>p</i><0.001). Panel D. Sedimentation of <i>M. aeruginosa</i> cells is enhanced by UVB radiation exposure. Dark-acclimated cells show faster sedimentation than PAR- acclimated. (*<i>p</i><0.05, **<i>p</i><0.01, ***<i>p</i><0.001).</p