Identification of Potential Impact of Ecotourism Development in Hatusua Beach Area Moluccas

Development and construction of ecotourism needs to be done. The existence of ecotourism development can improve the economy of the country and the surrounding community. Ecotourism development planning needs to pay attention to various things so that development can be optimal. This study aims to identify the potential impacts of ecotourism development in the Hatusua Beach Area. The research method uses a qualitative approach (exploratory research). The results showed that the pre-construction, construction, and operational stages of ecotourism development in the Hatusua coastal area had an impact on biotic, abiotic, and socio-cultural components

Observation of Surface-Avoiding Waves: A New Class of Extended States in Periodic Media

Coherent time-domain optical experiments on GaAs-AlAs superlattices reveal the exis-tence of an unusually long-lived acoustic mode at ~ 0.6 THz, which couples weakly to the environment by evading the sample boundaries. Classical as well as quantum states that steer clear of surfaces are generally shown to occur in the spectrum of periodic struc-tures, for most boundary conditions. These surface-avoiding waves are associated with frequencies outside forbidden gaps and wavevectors in the vicinity of the center and edge of the Brillouin zone. Possible consequences for surface science and resonant cavity ap-plications are discussed.Comment: 16 pages, 3 figure

Novel approach to a perfect lens

Within the framework of an exact analytical solution of Maxwell equations in a space domain, it is shown that optical scheme based on a slab with negative refractive index ($n=-1$) (Veselago lens or Pendry lens) does not possess focusing properties in the usual sense . In fact, the energy in such systems does not go from object to its "image", but from object and its "image" to an intersection point inside a metamaterial layer, or vice versa. A possibility of applying this phenomenon to a creation of entangled states of two atoms is discussed.Comment: 4 pages, 6 figure

Effect of Fibonacci Modulation On Superconductivity

We have studied finite-sized single band models with short range pairing interactions between electrons in presence of diagonal Fibonacci modulation in one dimension. Two models, namely the attractive Hubbard model and the Penson-Kolb model, have been investigated at half-filling at zero temperature by solving the Bogoliubov-de Gennes equations in real space within a mean field approximation. The competition between ``disorder'' and the pairing interaction leads to a suppression of superconductivity (of usual pairs with zero centre-of-mass momenta) in the strong-coupling limit while an enhancement of the pairing correlation is observed in the weak-coupling regime for both the models. However, the dissimilarity of the pairing mechanisms in these two models brings about notable difference in the results. The extent to which the bond ordered wave and the $\eta$-paired (of pairs with centre-of-mass momenta = $\pi$) phases of the Penson-Kolb model are affected by the disorder has also been studied in the present calculation. Some finite size effects are also identified.Comment: 14 pages, 13 figure

Orbital mechanisms of electron spin manipulation by an electric field

A theory of spin manipulation of quasi-two-dimensional (2D) electrons by a time-dependent gate voltage applied to a quantum well is developed. The Dresselhaus and Rashba spin-orbit coupling mechanisms are shown to be rather efficient for this purpose. The spin response to a perpendicular-to-plane electric field is due to a deviation from the strict 2D limit and is controlled by the ratios of the spin, cyclotron and confinement frequencies. The dependence of this response on the magnetic field direction is indicative of the strenghts of the competing spin-orbit coupling mechanisms

Bioecology of Blossom Midge of Jasmine, <em>Contarinia maculipennis</em> Felt (Cecidomyiidae: Diptera) in Different <em>Jasminum</em> Cultivars

Jasmine is a well-renowned flower around the world especially in the tropics because of its unique fragrance. Jasminum sambac, Jasminum auriculatum, Jasminum grandiflorum, and Jasminum nitidum are the four cultivable species of Jasminum. Blossom midge, Contarinia maculipennis Felt (Cecidomyiidae, Diptera), a dipteran pest, has attained the status of a major pest causing severe economic loss by reducing the marketable quality of the flowers. To compare the lifecycle of the notorious midge in all the cultivable Jasminum species, a detailed laboratory study was conducted at the Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore, India. The observations on life cycle parameters of blossom midge, C. maculipennis, revealed that the life cycle consists of egg, maggot, pupa, and adult. The life cycle and duration of each stage are found to be the shortest on J. nitidum and the longest on J. sambac

PENGARUH PERENCANAAN PAJAK DAN BEBAN PAJAK TANGGUHAN TERHADAP MANAJEMEN LABA (Studi Pada Perusahaan Manufaktur Subsektor Food and Beverage yang Terdaftar di Bursa Efek Indonesia Periode 2012-2016)

ABSTRAK Penelitia ini bertujuan untuk mengetahui pengaruh dari perencanaan pajak dan beban pajak tangguhan terhadap manajemen laba pada perusahaan manufaktur sektor food and beverage yang terdaftar di Bursa Efek Indonesia periode 2012-2016. Metode yang digunakan dalam penelitian ini adalah metode deskriptif. Teknik pengumpulan data yang dilakukan melalui data sekunder yaitu data yang diperoleh secara tidak langsung dengan mempelajari dokumem yang berhubungan dengan penelitian. Data diambil dalam bentuk data terpublikasi pada situs resmi Bursa Efek Indonesia. Analisis statistik yang digunakan adalah uji asumsi klasik, pengujian hipotesis dengan menggunakan uji t, analisis regresi sederhana, analisis korelasi, serta analisis koefisien determinasi. Dengan metode puposive sampling diperoleh 12 sampel perusahaan dari populasi 16 perusahaan sektor food and beverage dengan kriteria penelitian yang mana akan dijadikan sebagai objek penelitian. Berdasarkan hasil penelitian yang dilakukan dapat dilihat bahwa perencanaan pajak tidak berpengaruh signifikan terhadap manajemen laba. Beban pajak tangguhan tidak berpengaruh signifikan terhadap manajemen laba. Kata kunci: Perencanaan Pajak, Beban Pajak Tangguhan, dan Manajemen Lab

Comment on the proper QCD string dynamics in a heavy-light system

The string correction to the inter-quark interaction at large distances is derived using the field theory approach to a heavy-light quark-antiquark system in the modified Fock-Schwinger gauge.Comment: LaTeX2e, 6 pages, no figures, to appear in JETP Let