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"ABSTRAKDalam suatu pekerjaan preservasi jembatan di lingkungan Direktorat Jembatan, melibatkan banyak aktivitas serta pihak stakeholder yang terlibat di dalamnya sehingga dibutuhkan suatu pengembangan alur komunikasi. Pengembangan alur komunikasi yang dilakukan dengan mengidentifikasi faktor risiko yang mempengaruhi efektivitas komunikasi. Penelitian ini menggunakan data primer yang diperoleh melalui survey serta kuesioner dan data sekunder, dengan menggunakan analisis deskriptif dan uji korelasi untuk mengidentifikasi faktor-faktor risiko dalam alur komunikasi yang mempengaruhi efektivitas komunikasi. Berdasarkan hasil penelitian ini, teridentifikasi 20 faktor risiko tinggi yang akan digunakan sebagai dasar pengembangan alur komunikasi.

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ABSTRACTThere are many activity and stakeholder involved in bridge preservation project in Direktorat Jembatan, so developing a communication flow would be needed. Communication flow development would be done by identifying risk factors that affect the communication effectivity. This study using primary data collected from survey and questionnaire also secondary data, using descriptive analysis and correlation study to identify risk factors of communication flow that affect the communication?s effectiveness. The results was 20 high risk factors that has been identified and will be use to developing the communication flow.;"

"Tulisan ini membahas mengenai perilaku struktur jembatan busur tipe tie-arch yang diperuntukkan sebagai jalur kereta api satu jalur pada saat dikonstruksi secara offsite dan kemudian dipindahkan dengan metode pengangkatan. Hasil yang diperoleh pada penelitian ini yaitu perubahan gaya dalam, tegangan serta lendutan pada komponen utama struktur jembatan yang terdiri dari gelagar, batang lengkung dan kabel saat proses konstruksi. Metode analisa yang digunakan yaitu Forward assemblage analysis. Perubahan kondisi struktur jembatan saat proses konstruksi akan menyebabkan perubahan pada gaya dalam jembatan.

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This article discusses the structural behavior of single railway tied-arch bridge which off-site constructed and then moved by lifting it to the final position. The data will be obtaining as tension force in the cable during construction, inner force of girders, stress in each elements, and deflections which occur on the bridge's girder. In the construction phase, forward assemblage analysis method is used. The value of inner force and deflection on the bridge's girder will be change according to the construction phase. The response of the structure will also be different in each phase of construction with direct analysis, so that each analysis need to be considered."

"Designed as a first-stop reference for researchers and professionals in toxicology, pharmacology and medicine, this handbook is the to tie together the knowledge from many disciplines that has so far been available only from widely dispersed sources in the primary literature. As such, it presents the complete picture on what is currently known about endogenous toxins, including their generation, mode of action, resulting disease condition, and available countermeasures. Clearly divided into four parts, the first systematically covers important toxic molecule species, including metabolic intermediates and reactive oxygen species. The second discusses the role of genetically determined metabolic malfunctions, such as galactosemia, hyperlipidemia, porphyria, hemochromatosis and related conditions, while part three looks at acquired and chronic diseases caused or exacerbated by endogenous toxins, such as hepatic injury, asthma, rheumatism, colorectal cancer, reperfusion diseases, neurodegneration and aging. The final part reviews currents strategies to control and minimize the effect of endogenous toxins, either by nutritional or pharmacological interventions. With its complete coverage integrating molecular and systemic aspects from the biochemical basis to human disease conditions."

"Retakan transversal pada dek jetty berpola tertentu bisa mengidentifikasikan bahwa struktur tersebut mempunyai masalah direncana desain, rencana durabilitas ataupun pada proses konstruksi. Retakan pada beton merupakan hal yang normal terjadi. Namun, pada level tertentu retakan ini akan memberikan perasaan tidak aman dan nyaman kepada pengguna fasilitas yang ada.Laporan ini merupakan hasil dari laporan investigasi yang telah dilakukan pada proyek yang memiliki masalah retakan transversal pada dek nya. Pada investigasi tersebut dilakukan pada 3 bagian yang bisa berkontribusi terhadap retakan yang terjadi. 3 hal tersebut adalah standar kualitas yang berhubungan dengan material yang digunakan, metode konstruksi dan desain struktur.Hasil dari analisa yang telah dilakukan, tingkat absorpsi agregat kasar yang bisa menyebabkan shrinkage pada beton sedikit lebih tinggi tetapi menurut literatur bukan merupakan penyebab utama. Waktu pengecoran beton untuk dek trestle disarankan dilakukan teratur dengan mempertimbangkan suhu lingkungan pada saat itu. Efek perbedaan temperature pada struktur dan shrinkage sebaiknya diperhitungkan dan diameter dan pengaturan letak tulangan transversal perlu di-review kembali untuk menghindari pelemahan pada potongan transversal dek Jetty.

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Transverse cracking on trestle jetty deck with specific pattern can be some sign that the structures might be have some issued in the design pan, durability plan or in construction stages. Some crack in the concrete is normal to occurs but in the certain level, these cracks will make the user of the facilit feel unsafe and uncomfortable.

These report os the results of investigation on the project that have transverse cracking issued on the deck. Based on the literature study, there are three things that might contribute usch as quality standards that related to materials and design mix of concrete, construction work’s method and structural design.

Based on the analysis result, there some material quality such as absorption fine and coarse aggregate, concrete strength, cement content and the usage one design mix for all structures can make the deck likely to have transverse cracking. Construction method that related to the surrounding enviroment such as ambient temperature, concrete temperature, time of casting that affecting the cracks also. In the desain part, the analysis of loading from shrinkage and temperature gradient also can be the main issues if its not considered in the design."