Automatic thermal switch

An automatic thermal switch to control heat flow includes two thermally conductive plates and a thermally conductive switch saddle pivotally mounted to the first plate. A flexible heat carrier is connected between the switch saddle and the second plate. A phase-change power unit, including a piston coupled to the switch saddle, is in thermal contact with the first thermally conductive plate. A biasing element biases the switch saddle in a predetermined position with respect to the first plate. When the phase-change power unit is actuated by an increase in heat transmitted through the first place, the piston extends and causes the switch saddle to pivot, thereby varying the thermal conduction between the two plates through the switch saddle and flexible heat carrier. The biasing element, switch saddle, and piston can be arranged to provide either a normally closed or normally opened thermally conductive path between the two plates

Construction and Applications of CRT Sequences

Protocol sequences are used for channel access in the collision channel without feedback. Each user accesses the channel according to a deterministic zero-one pattern, called the protocol sequence. In order to minimize fluctuation of throughput due to delay offsets, we want to construct protocol sequences whose pairwise Hamming cross-correlation is as close to a constant as possible. In this paper, we present a construction of protocol sequences which is based on the bijective mapping between one-dimensional sequence and two-dimensional array by the Chinese Remainder Theorem (CRT). In the application to the collision channel without feedback, a worst-case lower bound on system throughput is derived.Comment: 16 pages, 5 figures. Some typos in Section V are correcte

Automatic thermal switch

An automatic thermal switch to control heat flow includes a first thermally conductive plate, a second thermally conductive plate and a thermal transfer plate pivotally mounted between the first and second plates. A phase change power unit, including a plunger connected to the transfer plate, is in thermal contact with the first thermally conductive plate. A biasing element, connected to the transfer plate, biases the transfer plate in a predetermined position with respect to the first and second plates. When the phase change power unit is actuated by an increase in heat transmitted through the first plate, the plunger extends and pivots the transfer plate to vary the thermal conduction between the first and second plates through the transfer plate. The biasing element, transfer plate and piston can be arranged to provide either a normally closed or normally open thermally conductive path between the first and second plates

Study of local flow conditions over a hemispherically blunted 25 deg cone for a shallow re-entry trajectory

Local flow conditions over hemispherically blunted 25 deg cone for shallow reentry trajector

A General Upper Bound on the Size of Constant-Weight Conflict-Avoiding Codes

Conflict-avoiding codes are used in the multiple-access collision channel without feedback. The number of codewords in a conflict-avoiding code is the number of potential users that can be supported in the system. In this paper, a new upper bound on the size of conflict-avoiding codes is proved. This upper bound is general in the sense that it is applicable to all code lengths and all Hamming weights. Several existing constructions for conflict-avoiding codes, which are known to be optimal for Hamming weights equal to four and five, are shown to be optimal for all Hamming weights in general.Comment: 10 pages, 1 figur

PENENTUAN BIAYA DAN PENJADWALAN PROYEK DENGAN MENGGUNAKAN ANALISIS HARGA SATUAN DAN PRECEDENCE DIAGRAM METHOD SERTA PERANCANGAN COST BASELINE DENGAN MEMPERTIMBANGKAN EARLY START TIME DAN LATE START TIME (Studi Kasus : Feed Study of Braced Monopod Wellhead

PT. Bina Rekacipta Utama merupakan perusahaan konsultan yang bergerak di bidang minyak dan gas, memiliki spesialisasi pada tahap perencanaan. PT. Bina Rekacipta Utama sempat mengalami kegagalan dalam usaha mendapatkan tender proyek yang menjadi sasarannya, seperti dalam proses tender yang dilakukan oleh Medco E&P Indonesia pada tahun 2011 dimana penawaran yang diajukan melenceng sampai dengan 30% dari nilai yang dibuat owner.Salah satu proyek yang menjadi target perusahaan berikutnya adalah proyek Feed Study of Braced Monopod Wellhead Platform yang diadakan oleh Korea Development Co., Ltd. PT. Bina Rekacipta Utama merasa perlu untuk dilakukan penghitungan perkiraan biaya proyek secara lebih baik serta melakukan penjadwalan proyek untuk memastikan proyek berjalan dengan baik. Untuk itu, akan dilakukan penelitian dengan sistematika pemecahan masalah yang terdiri atas tahap identifikasi, tahap penelitian awal, tahap pengumpulan dan pengolahan data, tahap analisis, dan tahap kesimpulan dan saran. Tahap identifikasi meliputi perumusan masalah dan tujuan yang ingin dicapai. Tahap penelitian awal meliputi kegiatan studi pustaka dan studi objek penelitian.Tahap pengumpulan dan pengolahan data meliputi kegiatan proses pengumpulan data-data yang dibutuhkan, dimulai dari pembuatan Work Breakdown Structure (WBS) untuk gambaran keseluruhan semua elemen pekerjaan yang akan dihitung harga satuan dan durasinya untuk setiap kegiatan. Selanjutnya, dilakukan penjadwalan dengan menggunakan precedence diagram method dan gantt chart. Berikutnya dirancang Cost Baseline proyek dengan mempertimbangkan penjadwalan early start (ES) dan penjadwalan late start (LS). Hasil rancangan Cost Baseline akan memperlihatkan seberapa besar biaya yang harus dikeluakan perusahaan sehingga dapat disesuaikan dengan term of payment yang akan dirumuskan. Diidentifikasi pula Project Quality Assurance yang akan menjaga kualitas hasil pengerjaan proyek.Kesimpulan yang didapat dari penelitian ini adalah biaya yang dibutuhkan dalam pelaksanaan proyek ini sebesar sebesar Rp.1.324.900.000,- (Satu Milyar Tiga Ratus Dua Puluh Empat Juta Sembilan Ratus Ribu Rupiah), dimulai pada tanggal 5 Desember 2011 dan akan selesai pada tanggal 15 Agustus 2012. Berdasarkan alternatif rancangan cost baseline didapat hasil rancangan berdasarkan penjadwalan early start time karena akan menguntungkan perusahaan dari segi kenyamanan dalam menyelesaikan pekerjaan serta keleluasaan dalam mengatur pengeluaran biaya proyek. perencanaan proyek, owner estimate, analisis harga satuan, PDM, early start time, late start time, dan cost baseline

An Update On The Possible Incorporation Of IFRS Into The U.S. Financial Reporting System

The SEC issued the “Commission Statement in Support of Convergence and Global Accounting Standards” in February 2010 to reaffirm its position that IFRS was best positioned to serve as the single set of high-quality globally accepted accounting standards and indicated that it would not incorporate IFRS into the financial reporting system for U.S. issuers unless such a change is in the best interest of U.S. investors and capital markets and that a determination was expected to be made in 2011 as to whether, when, and how to incorporate IFRS into the financial reporting system for U.S. issuers. It is now 2015 and the SEC still has not yet made a decision. Nonetheless, based on the statements given by the SEC Chief Accountant James Schnurr at the Baruch College Financial Reporting Conference in May 2015, it appears that the SEC might make a decision really soon. The wait for the SEC’s decision might finally be over. This paper provides an update on the possible incorporation of IFRS into the U.S. financial reporting system

Incorporating IFRS Into The U.S. Financial Reporting System

The SEC issued the “Commission Statement in Support of Convergence and Global Accounting Standards” in February 2010 to reaffirm its position that IFRS was best positioned to serve as the single set of high-quality globally accepted accounting standards and indicated that its staff would continue its evaluation of IFRS and a determination was expected to be made in 2011 as to whether, when, and how to incorporate IFRS into the financial reporting system for U.S. issuers. However, 2011 has come and gone and the SEC still has not yet made a decision. The SEC has indicated that it will not incorporate IFRS into the financial reporting system for U.S. issuers unless such a change is in the best interest of U.S. investors and capital markets.  Whatever decision eventually made by the SEC, hopefully, is indeed the most beneficial one for U.S. investors and capital markets. This paper provides an overview of the possible incorporation of IFRS into the U.S. financial reporting system