1,006 research outputs found

    SISTEM LOGISTIK PERTANIAN ANTAR PULAU DARI PELABUHAN MANADO

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    The purpose of this study was to identify the existing agricultural logistics system in Manado Harbor. This research was conducted at Manado Port as the starting point and end point. The research conducted from February to May 2017. This research used primary and secondary data. Primary data is collected with a list of questions that have been prepared for Head of Port Authority Unit of Manado City Transportation Department. Secondary data are obtained, among others, from the Office of Transportation and Marine Guard Unity. Sampling was conducted using Snowball Sampling Technique. The variables that will be measured in the research of this result are: What agricultural logistics goods are held in the Port, How to store goods in Manado Port warehouse, What transportation is used for shipping agricultural logistics, How to distribution of agricultural logistics goods, How to service delivery, What is the distance between islands (km). This research uses descriptive analysis that is to identify inter-island agricultural logistic system from Manado port and map agricultural logistic system in Manado Port. The results show that the existing logistics system in Manado Harbor has decreased not too drastically and the increase is very drastic in the year 2015. And passenger flow in the year 2011-2013 is still normal, but in 2014 and 2015 experienced a drastic increase due to passengers who soaring in that year. Logistics system in Port Manado also can be categorized pretty good because the data collection is good but still not specified agricultural goods are loaded, and for the equipment can be said to be good seen in terms of Port Manado which is still included in the category of Passenger Port, ships anchored in the Port of Manado is quite a lot and will be added over time, due to the soaring passengers between islands and goods brought. And in terms of facilities for passengers Manado Port has been very good, because the construction of infrastructure for passengers is being carried out at the time of research and development results are already visible at the time this study is completed

    The Principles of Social Order. Selected Essays of Lon L. Fuller, edited With an introduction by Kenneth I. Winston

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    The electron spins of semiconductor defects can have complex interactions with their host, particularly in polar materials like SiC where electrical and mechanical variables are intertwined. By combining pulsed spin resonance with ab initio simulations, we show that spin-spin interactions in 4H-SiC neutral divacancies give rise to spin states with a strong Stark effect, sub-10(-6) strain sensitivity, and highly spin-dependent photoluminescence with intensity contrasts of 15%-36%. These results establish SiC color centers as compelling systems for sensing nanoscale electric and strain fields

    Polytype control of spin qubits in silicon carbide

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    Crystal defects can confine isolated electronic spins and are promising candidates for solid-state quantum information. Alongside research focusing on nitrogen vacancy centers in diamond, an alternative strategy seeks to identify new spin systems with an expanded set of technological capabilities, a materials driven approach that could ultimately lead to "designer" spins with tailored properties. Here, we show that the 4H, 6H and 3C polytypes of SiC all host coherent and optically addressable defect spin states, including spins in all three with room-temperature quantum coherence. The prevalence of this spin coherence shows that crystal polymorphism can be a degree of freedom for engineering spin qubits. Long spin coherence times allow us to use double electron-electron resonance to measure magnetic dipole interactions between spin ensembles in inequivalent lattice sites of the same crystal. Together with the distinct optical and spin transition energies of such inequivalent spins, these interactions provide a route to dipole-coupled networks of separately addressable spins.Comment: 28 pages, 5 figures, and supplementary information and figure

    Alternative approach to electromagnetic field quantization in nonlinear and inhomogeneous media

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    A simple approach is proposed for the quantization of the electromagnetic field in nonlinear and inhomogeneous media. Given the dielectric function and nonlinear susceptibilities, the Hamiltonian of the electromagnetic field is determined completely by this quantization method. From Heisenberg's equations we derive Maxwell's equations for the field operators. When the nonlinearity goes to zero, this quantization method returns to the generalized canonical quantization procedure for linear inhomogeneous media [Phys. Rev. A, 43, 467, 1991]. The explicit Hamiltonians for the second-order and third-order nonlinear quasi-steady-state processes are obtained based on this quantization procedure.Comment: Corrections in references and introductio

    Identification of Potential Diesel Oil-degrading Bacteria Isolated From Manado Sea Port Based on 16s Rrna Gene

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    Petroleum contamination and its derivate in ecosystem are considered as environmental threat all over the world. Some microorganisms exhibit potential to degrade hydrocarbon in contaminated environments. This study aims at identifying potential diesel oil-degrading bacteria grown on artificial media. Bacteria isolated from Manado Sea port were grown in nutrient agar containing artificial diesel oil plus salt water and diesel oil only, respectively. The growing bacteria were isolated and each of them was grown separately to obtain pure isolate. Three bacterial isolates namely AO2, OA3 and OA4 were identified using 16S rRNA gene as Pseudomonas aeroginosa, Klebsiella oxytoca, and Citrobacter sp, respectively

    Interaction of the quantized electromagnetic field with atoms in the presence of dispersing and absorbing dielectric bodies

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    A general theory of the interaction of the quantized electromagnetic field with atoms in the presence of dispersing and absorbing dielectric bodies of given Kramers--Kronig consistent permittivities is developed. It is based on a source-quantity representation of the electromagnetic field, in which the electromagnetic-field operators are expressed in terms of a continuous set of fundamental bosonic fields via the Green tensor of the classical problem. Introducing scalar and vector potentials, the formalism is extended in order to include in the theory the interaction of the quantized electromagnetic field with additional atoms. Both the minimal-coupling scheme and the multipolar-coupling scheme are considered. The theory replaces the standard concept of mode decomposition which fails for complex permittivities. It enables us to treat the effects of dispersion and absorption in a consistent way and to give a unified approach to the atom-field interaction, without any restriction to a particular interaction regime in a particular frequency range. All relevant information about the dielectric bodies such as form and intrinsic dispersion and absorption is contained in the Green tensor. The application of the theory to the spontaneous decay of an excited atom in the presence of dispersing and absorbing bodies is addressed.Comment: Paper presented at the International Conference on Quantum Optics and VIII Seminar on Quantum Optics, Raubichi, Belarus, May 28-31, 2000, 14 pages, LaTeX2e, no figure

    Patterns and localized structures in bistable semiconductor resonators

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    We report experiments on spatial switching dynamics and steady state structures of passive nonlinear semiconductor resonators of large Fresnel number. Extended patterns and switching front dynamics are observed and investigated. Evidence of localization of structures is given.Comment: 5 pages with 9 figure

    Electrically and mechanically tunable electron spins in silicon carbide color centers

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    The electron spins of semiconductor defects can have complex interactions with their host, particularly in polar materials like SiC where electrical and mechanical variables are intertwined. By combining pulsed spin resonance with ab-initio simulations, we show that spin-spin interactions within SiC neutral divacancies give rise to spin states with an enhanced Stark effect, sub-10**-6 strain sensitivity, and highly spin-dependent photoluminescence with intensity contrasts of 15-36%. These results establish SiC color centers as compelling systems for sensing nanoscale fields.Comment: 10 pages, 4 figures, 1 tabl

    Three-dimensional quantization of the electromagnetic field in dispersive and absorbing inhomogeneous dielectrics

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    A quantization scheme for the phenomenological Maxwell theory of the full electromagnetic field in an inhomogeneous three-dimensional, dispersive and absorbing dielectric medium is developed. The classical Maxwell equations with spatially varying and Kramers-Kronig consistent permittivity are regarded as operator-valued field equations, introducing additional current- and charge-density operator fields in order to take into account the noise associated with the dissipation in the medium. It is shown that the equal-time commutation relations between the fundamental electromagnetic fields E^\hat E and B^\hat B and the potentials A^\hat A and ϕ^\hat \phi in the Coulomb gauge can be expressed in terms of the Green tensor of the classical problem. From the Green tensors for bulk material and an inhomogeneous medium consisting of two bulk dielectrics with a common planar interface it is explicitly proven that the well-known equal-time commutation relations of QED are preserved

    Mental health problems in youths committed to juvenile institutions: prevalences and treatment needs

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    Many international studies show that adolescents in coercive institutional care display high prevalences of mental disorders, especially in the form of disruptive behavior disorders [including attention-deficit/hyperactivity disorder (AD/HD), oppositional defiant disorder, and conduct disorder], anxiety disorders, and mood disorders. High degrees of overlap across mental disorders have also been reported. In addition, institutionalized adolescents are often traumatized. Despite this well-documented psychiatric morbidity, the mental health care needs of detained adolescents are often overlooked. The main objective of this study is to assess prevalences of psychiatric disorders, results of intelligence tests, and previous contacts with child and adolescent psychiatric services among adolescents in institutional care. DSM-IV diagnoses, mental health contacts, substance abuse, neurocognitive abilities, and school performance were registered in 100 adolescents (92 boys, 8 girls) aged 12–19 years (mean age 16.0; SD ± 1.5) consecutively committed to Swedish juvenile institutions between 2004 and 2007. At least one psychiatric disorder was diagnosed in 73% of the subjects: 48% met DSM-IV diagnostic criteria for AD/HD, 17% for an autism spectrum disorder, and 10% for a mental retardation. The collapsed prevalence for psychiatric disorders requiring specialist attention was 63%. Our data indicate that systematic diagnostic procedures are crucial in the treatment planning for institutionalized adolescents. Adequate treatment strategies need to be designed and implemented to meet the extensive mental health care needs of this vulnerable population
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