-Schedule delay is one of the worrying problems in the construction industry. Activity delays might increase project duration, cost and sometimes cause delay claim disputes between parties in construction projects. Some methods have been developed for analyzing and measuring project schedule delays, but most of those methods contain assumptions and subjective assessments. In order to identify the useful methods for projects in Indonesia, this study implements popular schedule delay analysis methods into a real project case in Indonesia which has varied relationships among activities and high frequency of concurrent delays. In this study, collecting and analyzing actual project schedule information, identifying delay events, executing delay analysis and comparing analytical results, have been completed to examine the possibilities of using available methods to provide reasonable or even correct outcomes. This study concludes that some of the available methods are unable to deal with concurrent delay problems and some result in different outcomes to the others. Therefore, choosing suitable methods would be an issue when solving delay analysis problems in Indonesia's construction projects

Delays in construction projects schedule is one of the most noticed problems. Delays may be caused by several project parties and further categorized into excusable noncompensable delays (EN) caused by many factors beyond parties' control, excusablecompensable delays (EC) caused by the owner, and non-compensable delays (NE) caused by the contractor. Another issue is concurrency in delays. The result of concurrent delay often leads the project parties into complicated situations. Thus, understanding the causes and identifying the types of delays are essential to be done before executing the delay analysis methods in order to allocating the liability of each party. This study concludes that some existed schedule delay analysis methods produce different results, therefore, the practitioners or schedule delay analyst should understand the anticipated results that can be accepted by all construction projects parties.

Sampah merupakan hasil buangan dari suatu produk atau barang yang sudah tidak digunakan lagi dan seringkali dikategorikan sebagai sesuatu hal yang dapat mencemari lingkungan. Oleh karena itu, perlu pengelolaan yang baik dan tepat agar sampah tidak mencemari lingkungan dan bahkan memberikan manfaat kepada manusia. Karakteristik sampah dalam pengelolaannya dibedakan atas sampah organik, sampah anorganik, dan sampah bahan berbahaya dan beracun (B3). Teknologi biogas merupakan teknologi pengolahan sampah organik tepatnya sampah kotoran ternak atau sisa tanaman dengan cara fermentasi dalam keadaan tertutup oleh bakteri Metalothrypus Methanica. Penggunaan teknologi biogas ini dapat menggantikan penggunaan gas LPG yang semakin sulit didapatkan. Selain itu, pemanfaatan biogas ini memberikan banyak keuntungan seperti sisa dari pengolahan yang masih bisa digunakan sebagai pupuk organik dan pengehematan biaya ekonomi rumah tangga.

This paper presents the result of three different type of reduced beam sections (RBS): radius cut, straight cut, and tapered cut under monotonic load using finite element analysis. Load is applied monotonically and divided into 9 steps, start from 500 N to 4500 N, which increasing 500 N for each step, continuously. The dimension for the beam is WF 500x200x10x16 is used for those three types of RBS. The results show that radius cut gives better performance than the other two types. Stress distribution, load-stress curve, and loaddisplacement curve of those three types of RBS are compared as the result, then lead to the conclusion that the most effective connection amongst those three types of RBS above is RBS with Radius Cut.

Proyek pembangunan konstruksi berpeluang mengalami keterlambatan dengan berbagai macam kendala dan produktivitas adalah salah satu faktor utama penentu jalannya suatu pembangunan. Penelitian pada tugas akhir ini mengolah analisa harga satuan. Method Statement Approval (MSA). Material Approval Submission (MAS). Time Schedule. dan Shop Drawing untuk menganalisis waktu. produktivitas. dan biaya pada pelaksanaan pekerjaan struktur komposit pelat lantai. Hasil analisa dari penelitian ini bahwa produktivitas rencana antara pelat komposit dan konvensional sama. Untuk produktivitas realisasi pekerjaan bondek 42.17 m²/Hari. pekerjaan wiremesh 3070.68 Kg/Hari dan pekerjaan beton 126.63 m³/Hari. Produktivitas realisasi pelat konvensional pekerjaan bekisting 414.34 m²/Hari. pekerjaan pembesian 2896.77 Kg/Hari dan pekerjaan beton 81.02 m³/Hari. Biaya yang dibutuhkan untuk pekerjaan pelat komposit rencana sebesar Rp. 3,19,534,719 dan realisasi sebesar Rp. 3,048,592,476. Sedangkan biaya untuk pekerjaan pelat konvensional rencana sebesar Rp. 950,640,926 dan realisasi sebesar Rp. 1,057,220,736.

Noise pollution often disturbs the people surrounding. The noise levels caused by traffic volume of automotive vehicles is one of the common causes. In order to examine the correlation of automotive vehicles with noise levels, this study implements linear and multiple regression methods into six case study locations in West Surabaya region that has dynamic of both economy and society. This study concludes that based on the obtained R square results, heavy vehicles (HV) has 70,80% of influence contribution with noise levels on the case study locations. It indicates that HV has the largest part in influencing the noise pollution compared to motorcycle (MC) and light vehicles (LV) that has 66,63% and 30,21%. On the other hand, for every 10% of MC, LV and HV volume increasing, the noise levels also increase by 1,726%, 2,032%, and 1,733% respectively. The correlation of MC, LV and HV vehicles with noise levels is represented in dB = 0,0025mc – 0,0056lv + 0,56hv + 49,539 of multiple regression model.

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The systematics of analysis process can be done by compiling some algorithm, based on the accuracy from the parameter. This research objective is to find and analyze mathematical models for noise pollution on arterial roads due to high traffic volume. Data are collected during on site surveys in West Surabaya by using manual traffic counter for recording light vehicle volume and Digital Sound Level (DSL) for recording the noise levels. Least Square Analysis Method is used to find the optimum mathematical model based on the highest value of R2 using polynomial of degree one (linear function), degree two, degree three, and degree four. The result shows that the polynomial of degree four obtained the highest value of R2 = 0.733 and the value of standard error = 2.8933, with the result that can be used as a reference to represent the condition of noise levels on that region.