Topology of the Relative Motion: Circular and Eccentric Reference Orbit Cases

This paper deals with the topology of the relative trajectories in flight formations. The purpose is to study the different types of relative trajectories, their degrees of freedom, and to give an adapted parameterization. The paper also deals with the research of local circular motions. Even if they exist only when the reference orbit is circular, we extrapolate initial conditions to the eccentric reference orbit case.This alternative approach is complementary with traditional approaches in terms of cartesian coordinates or differences of orbital elements

A first analysis of the mean motion of CHAMP

The present study consists in studying the mean orbital motion of the CHAMP satellite, through a single long arc on a period of time of 200 days in 2001. We actually investigate the sensibility of its mean motion to its accelerometric data, as measures of the surface forces, over that period. In order to accurately determine the mean motion of CHAMP, we use “observed&quot; mean orbital elements computed, by filtering, from 1-day GPS orbits. On the other hand, we use a semi-analytical model to compute the arc. It consists in numerically integrating the effects of the mean potentials (due to the Earth and the Moon and Sun), and the effects of mean surfaces forces acting on the satellite. These later are, in case of CHAMP, provided by an averaging of the Gauss system of equations. Results of the fit of the long arc give a relative sensibility of about 10^-3, although our gravitational mean model is not well suited to describe very low altitude orbits. This technique, which is purely dynamical, enables us to control the decreasing of the trajectory altitude, as a possibility to validate accelerometric data on a long term basis.<br><br><b>Key words.</b> Mean orbital motion, accelerometric dat

Study on Density and Morphometrics of Seagrass Enhalus Acoroides From Different Substrates on Coastal Waters of Tongkeina, City of Manado

This research was conducted in coastal waters of Tongkeina, Bunaken Sub-district, Manado City, North Sulawesi. The purpose of this research is to know the density and morphometric characters of seagrass, Enhalus acoroides on different substrates in Tongkeina waters. Data collection was conducted by using quadrant transect method. At the location of the study, three data retrieval points consist of muddy substrate, muddy sand substrate, and rubble were established. To collect data, 6 quadrant transects were lied down parallel to the coastline along the seagrass bed with a total distance of 50 m while the distance of 10 m between quadrant were applied. At each sampling point a 50 cm x 50 cm quadrant transect is placed systematically on 6 points in the each sub-station. Density observation was done by counting the number of seagrass stands on the transect at each observation point at each station. Pictures were taken with a waterproof camera and were classified accordingly based on the size of the squares. The highest numbers seagrass and morphometric characters of seagrass were found on the muddy substrate. This is because the substrate relatively in quiet waters and the growth of the seagrass is more concentrated on the length and width of the leaf. While the peak of the leaf blade is often eroded by the wave energy and the openness of the study site to the tides in relatively shallow waters, it could be also caused by environmental factors such as the strong currents that obtained at these stations. This fact also contributing to cause the growth of seagrasses is centered on leaves and roots as a form to defend themselves on fine sediments. Density and morphometric of seagrass such as leaf length, leaf width, and root length on the substrate indicate significant value or show a relationship

Lunar laser ranging in infrfared at hte Grasse laser station

For many years, lunar laser ranging (LLR) observations using a green wavelength have suffered an inhomogeneity problem both temporally and spatially. This paper reports on the implementation of a new infrared detection at the Grasse LLR station and describes how infrared telemetry improves this situation. Our first results show that infrared detection permits us to densify the observations and allows measurements during the new and the full Moon periods. The link budget improvement leads to homogeneous telemetric measurements on each lunar retro-reflector. Finally, a surprising result is obtained on the Lunokhod 2 array which attains the same efficiency as Lunokhod 1 with an infrared laser link, although those two targets exhibit a differential efficiency of six with a green laser link

The three-body problem and the Hannay angle

The Hannay angle has been previously studied for a celestial circular restricted three-body system by means of an adiabatic approach. In the present work, three main results are obtained. Firstly, a formal connection between perturbation theory and the Hamiltonian adiabatic approach shows that both lead to the Hannay angle; it is thus emphasised that this effect is already contained in classical celestial mechanics, although not yet defined nor evaluated separately. Secondly, a more general expression of the Hannay angle, valid for an action-dependent potential is given; such a generalised expression takes into account that the restricted three-body problem is a time-dependent, two degrees of freedom problem even when restricted to the circular motion of the test body. Consequently, (some of) the eccentricity terms cannot be neglected {\it a priori}. Thirdly, we present a new numerical estimate for the Earth adiabatically driven by Jupiter. We also point out errors in a previous derivation of the Hannay angle for the circular restricted three-body problem, with an action-independent potential.Comment: 11 pages. Accepted by Nonlinearit

Constraints on f(RijklRijkl)f(R_{ijkl}R^{ijkl}) gravity: An evidence against the covariant resolution of the Pioneer anomaly

We consider corrections in the form of $\Delta L(R_{ijkl}R^{ijkl})$ to the Einstein-Hilbert Lagrangian. Then we compute the corrections to the Schwarszchild geometry due to the inclusion of this general term to the Lagrangian. We show that $\Delta L_3=\alpha_{{1/3}}(R_{ijkl}R^{ijkl})^{{1/3}}$ gives rise to a constant anomalous acceleration for objects orbiting the Sun onward the Sun. This leads to the conclusion that $\alpha_{{1/3}}=(13.91\pm 2.11) \times 10^{-26}(\frac{1}{\text{meters}})^{{2/3}}$ would have covariantly resolved the Pioneer anomaly if this value of $\alpha_{{1/3}}$ had not contradicted other observations. We notice that the experimental bounds on $\Delta L_3$ grows stronger in case we examine the deformation of the space-time geometry around objects lighter than the Sun. We therefore use the high precision measurements around the Earth (LAGEOS and LLR) and obtain a very strong constraint on the corrections in the form of $\Delta L(R_{ijkl}R^{ijkl})$ and in particular $\Delta L=\alpha_n(R_{ijkl}R^{ijkl})^n$. This bound requires $\alpha_{{1/3}}\leq6.12\times 10^{-29}(\frac{1}{\text{meters}})^{{2/3}}$. Therefore it refutes the covariant resolution of the Pioneer anomaly.Comment: ...v5: references added, new discussions adde

ASUHAN KEBIDANAN PADA IBU MULTIPARA POST SECTIO CESAREA (SC) ATAS INDIKASI PRE-EKLAMPSIA BERAT DI RUANG FLAMBOYAN,RSUD. Prof. Dr. W . Z JOHANNES KUPANG TANGGAL 29 MEI – 01 JUNI 2017.

Latar belakang: Pre-eklampsia dalam kehamilan merupakan 5 – 5% penyulit kehamilan dan merupakan salah satu dari tiga penyebab tertinggi mortalitas dan morbiditas ibu bersalin. Di indonesia mortalitas daan morbiditas pre-eklampsia dalam kehamilan juga masih cukup tinggi. Hal ini disebabkan selain oleh etiologi tidak jelas, juga oleh perawatan dalm persalinan masih ditangani oleh petugas non medik dan sistem rujukan yang belum sempurnah. (Prawirohardjo, 2009). Tujuan: Dapat menerapkan asuhan kebidanan pada Ibu Multipara Post Sectio Cesarea atas indikasi Pre-Eklampsia Berat sehingga dapat memperluas, memperbanyak pengetahuan dan keterampilan mengenai asuhan kebidanan pada pasien dengan kegawatdaruratan obstetrik di ruang flamboyan RSUD Prof. Dr. W. Z. Johanes Kupang. Pembahasan: Berdasarkan Laporan Asuhan Kebidanan pada Ibu Multipara Sectio Cesarea Atas Indikasi Preeklampsia Berat di ruang flamboyan RSUD Prof. Dr. W. Z. Johanes Kupang. Hasil pemeriksaan di temukan Tekanan darah 160/110 mmHg, protein urine +3 dan odema pada kaki. Hal ini menunjukan pasien telah mengelami Preeklampsia Berat. Penanaganan pada ibu dengan preeklampsia Berat adalah Terpasang infus RL Drip MgSO4 40% 6 gr 28 tetes /menit/24 jam kemudian infus RL drip Oxy 20 IU tetes/menit/24 jam, by pass D5% Drip petidin 25 mg, 20 tetes/menit/24 jam, kolaborasi dengan Dokter, pemberian Therapy, dan melakukan perawatan luka operasi. Kesimpulan: Telah dilakukan asuhan kebidanan pada Ibu Post Sectio Cesarea dengan indikasi Pre-Eklampsia Berat di ruang Flamboyan RSUD Prof. Dr. W.Z. Johanes Kupang selama 3 hari dengan keadaan umum ibu baik, TTV dalam batas normal, luka operasi tidak ada tanda-tanda infeksi. Setelah dievaluasi tidak terjadi hal-hal yang menjandi komplikasi dari asuhan tersebut dan ibu pulang dengan keadaan sehat

Literasi Digital Dan Lingkungan Kerja Terhadap Kinerja Pegawai Dengan Perilaku Kerja Inovatif Sebagai Variabel Intervening

The aim of this research is to analyze the influence of digital literacy and work environment on the performance of employees with innovative work behavior as an intervening variable in Puskemas Kutasari District, Purbalingga, Central Java. To achieve this goal, primary data was used using the Likert scale 5-point survey method to gather data from respondents using the SmartPLS application. The study used quantitative analysis and structural equation modeling (SEM) to test seven hypotheses related to the relationship between digital literacy, work environment, innovative work behavior, and employee performance. The results showed that digital literature directly influences innovative employee behavior, digital literation influences employee achievement, the work environment does not influence employee performances, the working environment influences innovative work behaviors, and the employee’s performance through innovative work conduct.Tujuan penelitian ini adalah untuk menganalisis pengaruh literasi digital dan lingkungan kerja terhadap kinerja pegawai dengan perilaku kerja inovatif sebagai variabel intervening di Puskemas Kutasari Kabupaten Purbalingga Jawa Tengah. Untuk mencapai tujuan tersebut, digunakan data primer dengan metode survei Skala Likert 5 poin untuk mengumpulkan data dari responden dengan menggunakan aplikasi SmartPLS. Penelitian ini menggunakan analisis kuantitatif dan digunakan Structural Equation Modelling (SEM) untuk menguji 7 hipotesis yang terkait hubungan antara literasi digital, lingkungan kerja, perilaku kerja inovatif, dan kinerja pegawai. Hasil penelitian ini menunjukkan bahwa secara langsung literasi digital berpengaruh terhadap perilaku kerja inovatif, literasi digital berpengaruh terhadap kinerja pegawai, lingkungan kerja tidak berpengaruh terhadap kinerja pegawai, lingkungan kerja berpengaruh terhadap perilaku kerja inovatif, perilaku kerja inovatif berpengaruh terhadap kinerja pegawai. Sedangkan secara tidak langsung, lingkungan kerja berpengaruh terhadap kinerja pegawai melalui perilaku kerja inovatif, dan literasi digital berpengaruh terhadap kinerja pegawai melalui perilaku kerja inovatif