PERANAN KONSULTAN MANAJEMEN KONSTRUKSI PADA TAHAP PELAKSANAAN MECHANICAL ELECTRICAL – PLUMBING (ME-P) PROYEK PEMBANGUNAN PT. TRAKINDO UTAMA

Jasa  Konsultan  manajemen  konstruksi  biasanya  digunakan  pada  proyek  berskala  besar, dimana  konsultan  manajemen  konstruksi  berperan  untuk  mengelola  manajemen  proyek. Meskipun  demikian,  penggunaan  jasa  konsultasi  ini  tidak  menjamin  suatu  proyek pembangunan bisa berjalan  lancar. Justru berbagai permasalahan pada  tahap pelaksanaan pembangunan sering terjadi. Dalam pelaksanaan proyek ini, manajemen konstruksi berfungsi untuk mengatur  dan mengendalikan  pelaksanaan  kegiatan  proyek  dengan mengoptimalkan peranan  konsultan  manajemen  konstruksi.  Metode  yang  digunakan  adalah  manajemen konstruksi  murni,  mengingat  konsultan  manajemen  konstruksi  adalah  murni  wakil  pemilik proyek.  Pada  tahap  pelaksanaan  mechanical  electrical-plumbing  (ME-P)  proyek pembangunan  PT.  Trakindo  Utama,  peranan  konsultan  manajemen  tidak  dilaksanakan sepenuhnya  terutama dalam hal: (1) mengkoordinasi dan memberi pengarahan pada pihak-pihak  yang  terlibat,  (2)  melaksanakan  pengawasan  pekerjaan  di  lapangan,  (3)  mengen-dalikan  jadwal pelaksanaan berdasarkan waktu  yang  telah ditentukan dalam  jadwal  induk, sehingga pada akhirnya pekerjaan mengalami keterlambatan. Kata kunci : Konsultan Manajemen Konstruksi, pelaksanaan ME-P, wakt

A Distributed Game-Theoretic Solution for Power Management in the Uplink of Cell-Free Systems

This paper investigates cell-free massive multiple input multiple output systems with a particular focus on uplink power allocation. In these systems, uplink power control is highly non-trivial, since a single user terminal is associated with multiple intended receiving base stations. In addition, in cell-free systems, distributed power control schemes that address the inherent spectral and energy efficiency targets are desirable. By utilizing tools from game theory, we formulate our proposal as a noncooperative game, and using the best-response dynamics, we obtain a distributed power control mechanism. To ensure that this power control game converges to a Nash equilibrium, we apply the theory of potential games. Differently from existing gamebased schemes, interestingly, our proposed potential function has a scalar parameter that controls the power usage of the users. Numerical results confirm that the proposed approach improves the use of the energy stored in the battery of user terminals and balances between spectral and energy efficiency.Comment: Accepted at IEEE Globecom 202

A RETROSPECTIVE CLINICAL BASED STUDY OF MALARIA IN A UNIVERSITY TEACHING HOSPITAL

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ANALISIS CASH FLOW OPTIMAL PADA KONTRAKTOR PROYEK PEMBANGUNAN PERUMAHAN

Perkembangan  pemukiman  dari  waktu  ke  waktu  semakin  meningkat.  Hal  ini  seiring  dengan perkembangan proyek perumahan dengan  tujuan guna untuk memenuhi  kebutuhan masyarakat akan  hunian  yang  asri  dan  nyaman.  Namun  dalam  pelaksanaannya  investor  atau  pihak pengembang perlu mengetahui kepastian akan  investasi yang ditanamkan menyangkut sejumlah besar  dana,  dengan  demikian  dapat memperoleh  gambaran  sebagai  acuan  bagi  para  investor dalam pengembangannya pada tahap berikutnya. Resiko  waktu  dan  resiko  biaya  pada  proyek  konstruksi  bagi Kontraktor  pada  akhirnya  akan mengakibatkan  berkurangnya  keuntungan  Kontraktor,  sedangkan  tujuan  utama  Kontraktor dalam mengerjakan  suatu  proyek  konstruksi  adalah mendapatkan  keuntungan  optimal.  Salah satu cara pengendalian biaya pada proyek konstruksi adalah dengan merencanakan cash  flow proyek secara optimal sehingga dengan dana yang ada akan dicapai keuntungan yang optimal. Untuk mengetahui perencanaan cash  flow yang optimal, akan dianalisa perencanaan cash  flow berdasarkan Uang Muka 10%  dan 15% dengan pembayaran bulanan dilakukan selama 5 tahun, 10  tahun,  15  tahun. Dari  hasil  analisa  perencanaan  cash  flow Kontraktor  disimpulkan  bahwa perencanaan  cash  flow  optimal  adalah  perencanaan  cash  flow  dengan  sistem  pembayaran selama 5 tahun dengan uang muka 15%, karena pembayaran yang diterima lebih besar sehingga besar overdraft positif lebih kecil. Kata Kunci : perumahan, cash flow, overdraft

Catalyst stabilization by stoichiometrically limited layer-by-layer overcoating in liquid media

The use of metal oxide overcoats over supported nanoparticle catalysts has recently led to impressive improvements in catalyst stability and selectivity. The deposition of alumina is especially important for renewable catalysis due to its robustness in liquid-phase conditions. However, there are limited reports of work on alumina deposition and stabilization that goes beyond atomic layer deposition (ALD). Here, we present a layer-by-layer deposition technique for the controlled formation of conformal alumina overcoats in the liquid phase. This technique is easy to perform in common wet chemistry conditions. Alternated exposure of the substrate to stoichiometric amounts of aluminum alkoxide and water in liquid-phase conditions leads to the formation of a porous overcoat that was easily tunable by varying synthesis parameters. The deposition of 60 Al2O3 layers onto Al2O3-supported copper nanoparticles suppressed irreversible deactivation during the liquid-phase hydrogenation of furfural – a key biomass-derived platform molecule. The porous overcoat leads to highly accessible metal sites, which significantly reduces the partial site blocking observed in equivalent overcoats formed by ALD. We suggest that the ease of scalability and the high degree of control over the overcoat’s properties during liquid-phase synthesis could facilitate the development of new catalyst overcoating applications

The magnitude and timing of recalled immunity after breakthrough infection is shaped by SARS-CoV-2 variants

Vaccination against SARS-CoV-2 protects from infection and improves clinical outcomes in breakthrough infections, likely reflecting residual vaccine-elicited immunity and recall of immunological memory. Here, we define the early kinetics of spike-specific humoral and cellular immunity after vaccination of seropositive individuals and after Delta or Omicron breakthrough infection in vaccinated individuals. Early longitudinal sampling revealed the timing and magnitude of recall, with the phenotypic activation of B cells preceding an increase in neutralizing antibody titers. While vaccination of seropositive individuals resulted in robust recall of humoral and T cell immunity, recall of vaccine-elicited responses was delayed and variable in magnitude during breakthrough infections and depended on the infecting variant of concern. While the delayed kinetics of immune recall provides a potential mechanism for the lack of early control of viral replication, the recall of antibodies coincided with viral clearance and likely underpins the protective effects of vaccination against severe COVID-19

Between the Natural and the Artificial: The Sublime Sexual Sensation of Car Crashes in J.G. Ballard’s Crash

At a time when technology progressively pushes back nature, the sexual act runs the risk of being denaturalised. The notion of the sublime, which I argue is how humans react to the machine as a surrogate for nature and as a sexual stimulus in Crash (1973), is therefore of central interest in this article. Ballard himself has described Crash as ‘the first pornographic novel based on technology’ (1973, 6). This engagement with a technologised sexuality is explored as a subjective narrative stance, which grants authenticity to the fictive alter ego, who can probe alternatives to an extra-textual reality. This narrative mode is notably potent in relation to the narrator’s estimation of the merge between sexuality and technology in the form of car crashes uniting Eros and Thanatos. I therefore suggest that Crash can be read as an attempt to localise the natural and human in a world dictated by artificiality and technology