Exploratory Analysis of the Airspace Throughput and Sensitivities of an Urban Air Mobility System

The use of small, vertical-takeoff and landing aircraft to provide efficient, high-speed, ondemand passenger transportation within a metropolitan area (e.g. intra-city transportation) is a topic of increasing interest and investment within the aerospace and transportation communities. Preliminary, mostly vehicle-level analysis suggests that passenger-carrying Urban Air Mobility has the potential to provide meaningful door-to-door trip time savings compared to identical trips taken solely by automobile, even for relatively short trips of a few tens of miles. Subsequent analysis has shown that if such trips can be conducted at costs competitive with ground transportation, the demand for such flight operations, not surprisingly, becomes unprecedented by historical airspace operations counts, raising fundamental questions regarding feasibility, practicality, capacity and basic system attributes such as separation criteria. In this paper, we conduct a preliminary assessment of vertipad requirements and en route separation minima relative to the feasibility of large-scale urban aviation operations. This analysis is acknowledged as being far from comprehensive and is intended to help define the initial boundaries of an airspace system compatible with enabling high-volume operations

The Effect of Static Pressure on the Inertial Cavitation Threshold and Collapse Strength

The amplitude of the acoustic pressure required to nucleate a gas and/or vapor bubble in a fluid, and to have that bubble undergo an inertial collapse, is termed the inertial cavitation threshold. The hydrostatic dependence of the inertial cavitation threshold was measured up to 30 MPa in ultrapure water using a high quality factor spherical resonator. The threshold increased linearly with the hydrostatic pressure and was found to be temperature dependent. The strength of the bubble collapse at the threshold was measured in terms of shock waves and light emissions. The shock amplitudes increased linearly with the hydrostatic pressure, while the number of photons increased quadratically. The increase of the collapse strength was attributed to the increased threshold, and therefore to the amount of available acoustic energy

Middle schools: a sociological interpretation of their development and practice

Middle schools as separate and distinct institutions are still a relatively recent feature in the maintained school system in England. This new category of schools is not a homogeneous one. The two main types of middle school tater for pupils aged either 8 - 12 or 9 - 13 years, but there are other variants whose pupils are in the age range 9 - 12, 10 - 13 and 10 - 14 years. Administratively middle schools are 'deemed' either primary or secondary. First, this study sets out to analyse the development of middle schools in England within the context of comprehensive secondary school re-organisation. Then the decision to adopt middle schools of different types in two L.E.A.'s is examined in some detail. The intention is to explore how far decision making at the L.E.A. level about the form of school systems illustrates the considerations which appear to operate at the level of central government. In the second part, aspects of life in two specific middle schools are explored from the points of view of teachers and pupils. Again the intention is to explore how far and in what ways issues relating to middle school planning at the central and local government level make their impact in particular schools. The central theme throughout this study is the degree of congruence between the rhetoric used to legitimate middle schools and the reality experienced within them. The problem of linking 'macro' and 'micro' levels of analysis is a familiar and persistent one in the sociology of education. In this study a theoretical synthesis to link decisions made about middle schools at central, government, local education authority and school ,level is made by way of an adaptation of exchange theory. It is suggested that this theoretical stance both clarifies and illuminates the data presented in the thesis and provides a framework in which future middle school developments can be located and interpreted

Extending bicluster analysis to annotate unclassified ORFs and predict novel functional modules using expression data

<p>Abstract</p> <p>Background</p> <p>Microarrays have the capacity to measure the expressions of thousands of genes in parallel over many experimental samples. The unsupervised classification technique of bicluster analysis has been employed previously to uncover gene expression correlations over subsets of samples with the aim of providing a more accurate model of the natural gene functional classes. This approach also has the potential to aid functional annotation of unclassified open reading frames (ORFs). Until now this aspect of biclustering has been under-explored. In this work we illustrate how bicluster analysis may be extended into a 'semi-supervised' ORF annotation approach referred to as BALBOA.</p> <p>Results</p> <p>The efficacy of the BALBOA ORF classification technique is first assessed via cross validation and compared to a multi-class <it>k</it>-Nearest Neighbour (kNN) benchmark across three independent gene expression datasets. BALBOA is then used to assign putative functional annotations to unclassified yeast ORFs. These predictions are evaluated using existing experimental and protein sequence information. Lastly, we employ a related semi-supervised method to predict the presence of novel functional modules within yeast.</p> <p>Conclusion</p> <p>In this paper we demonstrate how unsupervised classification methods, such as bicluster analysis, may be extended using of available annotations to form semi-supervised approaches within the gene expression analysis domain. We show that such methods have the potential to improve upon supervised approaches and shed new light on the functions of unclassified ORFs and their co-regulation.</p

Guidelines for the Installation of Left-Turn Phasing

The objective of this study was to update the guidelines to be considered when determining whether left-turn phasing should be used and the appropriate type at phasing to use. Emphasis was placed on high speed areas. There were 264 intersections included in the study with data obtained tor 518 approaches at these intersections. The data included accidents and characteristics at the intersection. Traffic conflict data were collected. Simulation models were used to estimate delays. Recommendations were made concerning guidelines to consider when deciding whether to install left turn phasing and whether to use protected-only or protected/permitted phasing. Variables considered included accident history, traffic volume and delay, traffic speed, number at left-turn lanes, number of opposing lanes, sight distance, intersection geometrics, left-turn volume, and opposing volume

Rancang Bangun Sistem Pakar Diagnosa Karies Gigi pada Gigi Permanen dengan Metode Certainty Factor Berbasis Web

Meningkatnya kasus karies gigi di Indonesia dari tahun ke tahun disebabkan oleh tingkat kesadaran pengobatan karies gigi yang rendah anggapan bahwa gejala karies gigi tingkat awal sebagai suatu yang tidak mengkhawatirkan dilihat dari angka DMF-T (Decayed, Missing, Filled Teeth) yang semakin tinggi seiring dengan pertambahan usia menurut Riset Kesehatan Dasar Nasional (Riskesdas) 2018 dan World Health Organisation (WHO). Ketika kunjungan ke dokter gigi dilakukan, karies telah berada dalam keadaan parah dan harus dicabut sehingga merugikan dari segi finansial dan kesehatan. Oleh karena itu, dibuatlah sistem pakar untuk melakukan diagnosa karies gigi pada gigi permanen untuk membantu melakukan deteksi karies gigi lebih awal dan menyelesaikan permasalahan yang ada. Proses rancang bangun sistem pakar ini mengimplementasikan metode Certainty Factor, yang mana pengguna tinggal memasukkan gejala yang mereka rasakan dan sistem akan melakukan kalkulasi berdasar pada bobot yang telah diberikan pada tiap gejala. Sistem pakar dibangun dengan berbasis web dan menggunakan framework ReactJS dengan Firebase sebagai backend service. Hasil dari penelitian yang telah dilakukan menunjukkan sistem pakar berhasil dibangun dan metode Certainty Factor berhasil diimplementasikan dengan tingkat akurasi mencapai angka 86,67%. Hal ini juga didukung dengan hasil pengukuran kelayakan sistem oleh pengguna dengan hasil mencapai 88% pengguna setuju bahwa sistem ini telah berhasil menjalankan fungsi untuk melakukan diagnosa penyakit karies gigi pada gigi permanen

Rancang Bangun Aplikasi Mobile Visualisasi Produk Fashion Berbasis Model Tiga Dimensi: Studi Kasus Apple Developer Academy@BINUS

Visualisasi produk merupakan salah satu penunjang kepuasan konsumen dalam pembelian produk fashion secara online. Namun, bentuk visualisasi produk berupa foto dua dimensi dan deskripsi masih dirasa belum jelas dan memicu tingginya return rate dan peningkatan sampah akibat pembelian tidak terpakai.Sebagai salah satu perusahaan yang senantiasa mendorong untuk menyelesaikan permasalahan dengan solusi berbasis teknologi, Apple Developer Academy@BINUS (PT Panji Edukasi Nusantara) senantiasa selalu berusaha memberikan terobosan baru dalam berbagai aspek keidupan masyarakat. Hal ini membuat perusahaan memutuskan untuk melakukan rancang bangun aplikasi visualisasi produk fashion berbasis model tiga dimensi yang diberi nama Fitze dengan tujuan untuk membantu pengguna yang berbelanja online untuk mendapatkan visualisasi terbaik melalui perwujudan produk dalam bentuk tiga dimensi yang dapat diputar hingga 360 derajat, proyeksi ke dunia nyata dengan Augmented Reality, dan size calculator untuk memberikan rekomendasi ukuran. Metode pengembangan aplikasi adalah dengan menggunakan scrum untuk mendukung waktu perilisan usable product dari perusahaan. Pengembangan aplikasi ini berbasis di platform iOS dengan implementasi antarmuka dilakukan dengan menggunakan konsep programmatic UI berbasis dengan UIKit dikombinasikan dengan Firebase sebagai backend services. Proses rancang bangun telah berhasil dilakukan dan hasil implementasi dari aplikasi ini telah dirilis ke marketplace aplikasi khusus iOS, yaitu App Store

Rancang Bangun Front-End Aplikasi Digital Loan dan Modul Account Officer Website Approval bjb mesra: Studi Kasus PT Bank Pembangunan Daerah Jawa Barat dan Banten Tbk.

Sebagai salah satu pelaku di industri perbankan, PT Bank Pembangunan Daerah Jawa Barat dan Banten, Tbk. (bank bjb) harus selalu mengikuti perkembangan teknologi yang dapat mendukung dan meningkatkan pelayanan yang diberikan, salah satunya dalam bidang pengajuan produk kredit. Berangkat dari hal ini, maka perusahaan memutuskan untuk melakukan rancang bangun aplikasi Digital Loan dengan tujuan untuk membantu pengajuan pinjaman secara online dan dapat di- lakukan secara mobile. Pengembangan aplikasi ini dilakukan dengan menggunakan bahasa Dart yang dikemas dalam framework Flutter, sehingga nantinya aplikasi dapat berjalan lintas platform. Pihak yang juga penting terlibat dalam proses pen- gajuan kredit adalah Account Officer yang bertugas untuk memfasilitasi pengajuan kredit nasabah, khususnya pada produk kredit seperti bjb Mesra yang memiliki re- quirements pengajuan cukup banyak. Digitalisasi pada sektor pengajuan juga harus diikuti pada sektor penerimaan data pengajuan yang sudah berbentuk digital. Oleh karena itu, perusahaan juga membuat Website Approval bjb Mesra untuk membantu dalam memproses data yang masuk dan melakukan follow up dalam pengajuan kredit, dengan penulis terlibat dalam pembuatan modul Account Officer. Website ini dibuat dengan menggunakan framework ReactJS karena memiliki dukungan an- tarmuka yang sangat baik. Proses rancang bangun aplikasi digital loan telah selesai hingga tahapan dirilis ke marketplace aplikasi yang kemudian dapat diunduh oleh seluruh nasabah, sedangkan modul Account Officer Website Approval bjb Mesra sudah dapat digunakan secara internal

Modernization of the Walker River Irrigation District Water Gauges

The Irrigation Training and Research Center (ITRC) and Walker River Irrigation District (WRID) collaborated on WRID’s Water Gauge Improvement Project with support from the Bureau of Reclamation, U.S. Department of Interior in Carson City, Nevada. This paper presents a summary of the proposed plan and implementation for improving water gauges in WRID with strategic engineering recommendations for new hardware and control equipment; water management strategies; flow measurement devices; and integration of a new district-wide SCADA system. Field investigations and engineering analyses were carried out by the ITRC in 2009 to inspect existing WRID infrastructure, to review current operational procedures, and to interview district staff. This information was analyzed and compiled to summarize the scope of work for system improvements. The ITRC prioritized the order of engineering implementation and automation recommendations, provided planning-level cost estimates, and has assisted WRID in organizing implementation over the past five years