Hasil Pencarian  ::  Simpan CSV :: Kembali

"Tesis ini membahas pengaruh substitusi alga kedalam resin pembentuk akrilik dalam konteks material transparan bangunan berkelanjutan. Penelitian ini merupakan penelitian eksperimental dengan fokus kuantitatif, nilai performa mekanis dan spektroskopi bidang material transparan dikuantifikasi untuk membandingkan dengan nilai material yang lain dan juga standar SNI yang berlaku. Hasil penelitian menunjukan bahwa alga mempunyai pengaruh dan tidak kehilangan karakteristiknya meskipun digunakan dalam bentuk ekstrak.

---

This thesis examines the effect of substitution of algae into acrylic-forming resins in the context of transparent sustainable building materials. This research is an experimental study with a quantitative focus, quantified mechanical performance values and field spectroscopy of transparent materials to compare with other material values and also the applicable SNI standards. The results showed that algae had an effect and did not lose its characteristics even though it was used in extract form."

"Pengembangan teknologi prostesis yang dilakukan akhir-akhir ini memungkinkan ahli bedah untuk mengganti seluruh tulang pada berbagai anggota badan. Prostesis khusus, yang disebut dengan megaprosthesis ini, mulai dikembangkan untuk mengganti tulang yang terkena tumor primer seperti osteosarcoma, chondrosarcoma, dan lain sebagainya, dan merupakan solusi yang tepat untuk ahli bedah ortopedi dalam kasus yang ekstrim. Penelitian ini berfokus pada langkah-langkah persiapan simulasi casting desain untuk pembuatan megaprosthesis implant dan pengecoran hasil simulasi melalui proses vacuum centrifugal casting. Selain itu, variasi posisi bagian casting, jumlah, bentuk dan dimensi ingate, serta total luas penampang ingate (Si) diterapkan saat membuat desain gating system untuk simulasi pengecoran menggunakan software Solid-Cast 7. Hasil uji solidifikasi menunjukkan bahwa rongga susut cenderung menurun dalam skala volumetrik dengan meningkatnya total luas permukaan ingate, sedangkan posisi bagian casting, jumlah, bentuk, dan dimensi ingate menunjukkan perbedaan efektif terhadap efektifitas solidifikasi logam cair pada susunan rongga susut. Titanium (CP-Ti) dengan suhu dan waktu penuangan 1700˚C dan 4s. Variasi kecepatan putar 10rpm, 35rpm, dan 60rpm, digunakan sebagai parameter untuk proses vacuum centrifugal casting. Semakin bertambahnya rpm yang digunakan menghasilkan nilai kekerasan yang fluktuatif dan cenderung menurun. Nilai kekasaran permukaan menunjukkan hasil yang stabil. Desain pengecoran megaprosthesis implant dengan tiga saluran masuk dan luas penampang 368,93mm2 lebih tinggi dari standar Asm 207,54mm2 menghasilkan porositas yang lebih rendah.

---

Recent developments in prosthesis technology have allowed surgeons to replace all bones in various limbs. A special prosthesis, called megaprosthesis, was developed to replace bones affected by primary tumors such as osteosarcoma, chondrosarcoma, etc., and is the right solution for orthopedic surgeons in extreme cases. This research focuses on the preparation steps of design casting simulation for the manufacture of implant megaprosthesis and casting simulation results through a vacuum centrifugal casting process. In addition, variations in the position of the casting part, the number, shape and dimensions of the ingate, as well as the total area of ​​the ingate (Si) cross section are applied when creating a gating system design for casting simulations using Solid-Cast 7 software. Solidification test results show that shrinkage cavities tend to decrease in scale volumetric with the increase in the total surface area of ​​the ingate, while the position of the casting part, the number, shape, and dimensions of the ingate show effective differences in the effectiveness of liquid metal solidification in the arrangement of the shrinkage cavity. Titanium (CP-Ti) with a temperature and pouring time of 1700˚C and 4s. Variations in rotational speed of 10rpm, 35rpm and 60rpm are used as parameters for the vacuum centrifugal casting process. Increasing the rpm used produces a fluctuating value of violence and tends to decrease. Surface roughness values ​​show stable results. The design of the implant megaprosthesis casting with three inlets and a cross-sectional area of ​​368.93mm2 higher than the Asm 207.54mm2 standard results in lower porosity."

"Mobile gasifier merupakan prototipe untuk memproduksi listrik dari feedstock berbahan baku biomassa dengan fleksibilitas yang cukup tinggi dan dapat dipindahkan kemana-kemana, sangat memudahkan pengguna untuk menghasilkan listrik di daerah yang belum memiliki listrik. Dalam hal ini bahan baku yang digunakan adalah sekam padi. Peran mesin dalam mengenerasi engine sangatlah penting. Maka dalam penelitian ini bertujuan untuk mengetahui variasi putaran mesin dan Air Fuel Ratio (AFR) dengan variasi putaran yang berbeda-beda. Penelitian ini menggunakan variasi putaran pada mesin dengan putaran 100 untuk initial dan 250 hingga 3500 rpm dengan variasi 250 serta Air Fuel Ratio (AFR) yaitu 0,75 hingga 1.2 dengan variasi 0.05 menggunakan bahan bakar syngas. Syngas berasal dari proses gasifikasi downdraft gasifier dengan bahan bakar sekam padi. Pengujian dilakukan pada unit mesin Mitshubishi Colt Diesel dengan tipe engine PS-100 dan menggunakan metode modelling. Modelling dilakukan untuk meanalisa hubungan antara putaran mesin dengan Daya Efektif (NE), indicated mean effective pressure (IMEP), Pumping Mean Effective Pressure (PMEP), Break Mean Effective Pressure(BMEP), torsi dan nilai NOx. Dari percobaan ini dapat disimpulkna dengan membandingkan Air Fuel Ratio (AFR) dari campuran lean hingga campuran rich, diketahui bahwa campuran rich cenderung menghasilkan daya dan torsi yang besar, akan tetapi konsumsi bahan bakar spesific lebih tinggi. Dari hasil percobaan menunjukan nilai torsi tidak berbanding lurus dan cenderung terbalik dengan peningkatan putaran mesin (rpm) dan berbanding terbalik apabila dibandingkan dengan Air Fuel Ratio (AFR). Setelah pengujian dilakukan, maka dapat disimpulkan bahwa pada putaran 2750rpm merupakan putaran yang optimum dimana menghasilkan 383 Nm dan dengan BMEP sebesar 8.2 Bar serta menghasilkan daya efektif sebesar 109.29 Hp. Hasil emisi pada putaran 2750 menghasilkan 182.30 mg/Nm3, dibawah ambang batas berdasarkan Peraturan Menteri Lingkungan Hidup dan Kehutanan Republik Indonesia Nomor P.15 / MENLHK / SETJEN / KUM. 1/ 4 / 2019.

---

The mobile gasifier is a prototype for producing electricity from biomass raw materials with high flexibility and can be moved anywhere, making it very easy for users to generate electricity in areas that do not have electricity. In this case, the raw material used is rice husk. The role of the engine in generating the engine is very important. So this study aims to determine variations in engine speed and Air Fuel Ratio (AFR) with different rotation variations. This study uses engine speed variations with a rotation of 100 for the initial and 250 to 3500 rpm with a variation of 250 and the Air Fuel Ratio (AFR) of 0.75 to 1.2 with a variation of 0.05 using syngas fuel. Syngas comes from the downdraft gasifier gasification process with rice husk as fuel. The test was carried out on the Mitsubishi Colt Diesel engine unit with the PS-100 engine type and using the modeling method. The modeling is carried out to analyze the relationship between engine speed and Effective Power (NE), showing the mean effective pressure (IMEP), Pumping Mean Effective Pressure (PMEP), Break Mean Effective Pressure (BMEP), torque and NOx values. From this experiment, it can be concluded that by comparing the Air Fuel Ratio (AFR) from a lean mixture to a rich mixture, it is known that a rich mixture will produce greater power and torque, but higher fuel consumption. The experimental results show that the torque value is not directly and inversely proportional to the increase in the engine (rpm) and inverse rotation when compared to the Air Fuel Ratio (AFR). It can be concluded that at 2750rpm rotation is the optimal rotation which produces 383 Nm and with a BMEP of 8.2 Bar and produces an effective power of 109.29 Hp. The emission results in the 2750 cycle produce 182.30 mg/Nm3, below the threshold based on the Regulation of the Minister of Environment and Forestry of the Republic of Indonesia Number P.15 / MENLHK / SETJEN / KUM. 1/4/2019.

"

"This book is essentially a guided tour of the fundamental concepts in digital signalprocessing (DSP) and analysis, in which the guide is not a theoretician of thevarious algorithms involved, but a user of them; a scientist that early in her lifestarted studying these techniques to apply them in a proper and fruitful way in herresearch work. Therefore the approach to the various topics is the approach of auser, more concerned about the way to best exploit the possibilities they offer,rather than their purely mathematical facets."

"[ABSTRAKPerkembangan bisnis dan martketing yang sangat cepat mendorong naiknyakebutuhan akan media telekomunikasi yang reliable, menarik, dan dinamis. Metodedalam penyebaran informasi yang populer digunakan saat ini adalah penyiaran. Dimanapenggunaan spektrum frekuensi radio untuk keperluan penyiaran mengacu pada definisilayanan penyiaran pada peraturan radio ITU. Layanan penyiaran adalah suatu serviskomunikasi radio dimana transmisinya ditujukan untuk penerimaan langsung olehmasyarakat umum. Penyiaran televisi lebih sering digunakan sebagai sarana penyebaraninformasi dibandingkan dengan radio, karena dapat menyampaikan informasi secara jelasdengan suara dan gambar. Semakin luas daerah jangkauan siaran suatu stasiun TV, makaakan semakin banyak manfaat yang dapat dirasakan karena informasi dapat diterimadengan baik oleh masyarakat.Terdapat dua stasiun TV swasta di Bandung yang akan melakukan perluasanwilayah ke kota yang berdekatan, yaitu di kota Garut dan Sukabumi denganmenambahkan repeater baru serta menaikkan daya pancarnya. Kedua stasiun TV swastadi Bandung tersebut menempati kanal 42 dan 44. Kedua stasiun TV tersebut merupakanpemancar TV analog dan akan menggunakan kanal yang sama pada kota Garut danSukabumi. Kedua stasiun TV analog ini memiliki kanal bersebelahan dengan stasiun TVanalog dan stasiun TV digital. Penambahan repeater baru dan menaikkan daya pancarnyadapat memungkinkan terjadinya interferensi kanal bersebelahan. Untuk mengatasi haltersebut, maka dibuat sebuah aturan bahwa kuat medan penerimaan televisi siaran UHFpada lokasi titik pengujian atau pengukuran setiap wilayah layanan dibatasi paling besar70 dBμV/m untuk band V.Skripsi ini bertujuan untuk menganalisis simulasi daya pancar untuk perluasanwilayah siaran TVdari Bandung ke Garut dan Sukabumi, dengan menentukan pola radiasidan menaikan daya pancar repeater baru dengan batasan rasio proteksi agar daerahjangkauan dan populasi di kota Garut dan Sukabumi terlayani. Hasil dari simulasidiperoleh daya pancar pada kanal 42 dan 44 di kota Garut sebesar 42 dBW denganantena 4-1 dan daya pancar pada kanal 42 dan 44 di kota Sukabumi sebesar 38,3 dBWdengan antena 730 372. Dengan penggunaan daya pada masing-masing pemancartersebut telah memenuhi wilayah cakupan yang terlayani pada kota Garut dan Sukabumidan pemancar yang digunakan tidak menginterferensi kanal yang bersebelahan. Namunterdapat beberapa wilayah yang tidak tercakup sinyal pancar karena kontur wilayah yangbergunung-gunung.Kata kunci : interferensiABSTRACTThe rapid growth of various business and marketing leads to the needs of reliable,attractive, and dynamic telecommunication media. Broadcasting is one of the popularmedia which ever used in centuries. In the practical utilities, the broadcasting services usea particular radio spectrum frequency with respect to the ITU-T standard. Thebroadcasting services provide the essential informations which are directly served to thepublic user. Broadcasting is rather used to publicize the information than the radio due toits perceptibility through the sound and image repsentations. Consequently, the larger thecoverage area of the broadcasting services the more advantages can be obtained becausethe informations can be delivered properly to the user.In this final project, there are two private television provider where both arelocated in Bandung. Theirs location are alongside cities which are Garut and Sukabumi.In order to broaden their coverage area, they increased the number of repeater and thelevel of power used by the transmitter respectively. Unfortunately, this method leads to anadjacent channel interference. In order to withstand this effect, policies are made to limitthe usage of the bandwidth. For every service area the allocation is set to be at amaximum of 70 dBμV/m for V band.This final project is aimed to analyze the power used by the transmission tobroaden the coverage area of the television services from Bandung to Garut andSukabumi. The radiation patterns enhancement and the increase of transmitted power bythe new repeaters are used. As a result, it is proved that for Garut and Sukabumi the 42dBW and 38,3 dBW are appropriate with the use of the 4-1 and 730-372 antennasrespectively in the 42nd and 44th channels. In the attained transmitted power, the adjacentchannel interference can be evaded. In case of the extending the coverage area, there arestill some particular areas which are delicate to overcome due to its geograhical contourwhich are mainly mountains.;The rapid growth of various business and marketing leads to the needs of reliable,attractive, and dynamic telecommunication media. Broadcasting is one of the popularmedia which ever used in centuries. In the practical utilities, the broadcasting services usea particular radio spectrum frequency with respect to the ITU-T standard. Thebroadcasting services provide the essential informations which are directly served to thepublic user. Broadcasting is rather used to publicize the information than the radio due toits perceptibility through the sound and image repsentations. Consequently, the larger thecoverage area of the broadcasting services the more advantages can be obtained becausethe informations can be delivered properly to the user.In this final project, there are two private television provider where both arelocated in Bandung. Theirs location are alongside cities which are Garut and Sukabumi.In order to broaden their coverage area, they increased the number of repeater and thelevel of power used by the transmitter respectively. Unfortunately, this method leads to anadjacent channel interference. In order to withstand this effect, policies are made to limitthe usage of the bandwidth. For every service area the allocation is set to be at amaximum of 70 dBμV/m for V band.This final project is aimed to analyze the power used by the transmission tobroaden the coverage area of the television services from Bandung to Garut andSukabumi. The radiation patterns enhancement and the increase of transmitted power bythe new repeaters are used. As a result, it is proved that for Garut and Sukabumi the 42dBW and 38,3 dBW are appropriate with the use of the 4-1 and 730-372 antennasrespectively in the 42nd and 44th channels. In the attained transmitted power, the adjacentchannel interference can be evaded. In case of the extending the coverage area, there arestill some particular areas which are delicate to overcome due to its geograhical contourwhich are mainly mountains.;The rapid growth of various business and marketing leads to the needs of reliable,attractive, and dynamic telecommunication media. Broadcasting is one of the popularmedia which ever used in centuries. In the practical utilities, the broadcasting services usea particular radio spectrum frequency with respect to the ITU-T standard. Thebroadcasting services provide the essential informations which are directly served to thepublic user. Broadcasting is rather used to publicize the information than the radio due toits perceptibility through the sound and image repsentations. Consequently, the larger thecoverage area of the broadcasting services the more advantages can be obtained becausethe informations can be delivered properly to the user.In this final project, there are two private television provider where both arelocated in Bandung. Theirs location are alongside cities which are Garut and Sukabumi.In order to broaden their coverage area, they increased the number of repeater and thelevel of power used by the transmitter respectively. Unfortunately, this method leads to anadjacent channel interference. In order to withstand this effect, policies are made to limitthe usage of the bandwidth. For every service area the allocation is set to be at amaximum of 70 dBμV/m for V band.This final project is aimed to analyze the power used by the transmission tobroaden the coverage area of the television services from Bandung to Garut andSukabumi. The radiation patterns enhancement and the increase of transmitted power bythe new repeaters are used. As a result, it is proved that for Garut and Sukabumi the 42dBW and 38,3 dBW are appropriate with the use of the 4-1 and 730-372 antennasrespectively in the 42nd and 44th channels. In the attained transmitted power, the adjacentchannel interference can be evaded. In case of the extending the coverage area, there arestill some particular areas which are delicate to overcome due to its geograhical contourwhich are mainly mountains.;The rapid growth of various business and marketing leads to the needs of reliable,attractive, and dynamic telecommunication media. Broadcasting is one of the popularmedia which ever used in centuries. In the practical utilities, the broadcasting services usea particular radio spectrum frequency with respect to the ITU-T standard. Thebroadcasting services provide the essential informations which are directly served to thepublic user. Broadcasting is rather used to publicize the information than the radio due toits perceptibility through the sound and image repsentations. Consequently, the larger thecoverage area of the broadcasting services the more advantages can be obtained becausethe informations can be delivered properly to the user.In this final project, there are two private television provider where both arelocated in Bandung. Theirs location are alongside cities which are Garut and Sukabumi.In order to broaden their coverage area, they increased the number of repeater and thelevel of power used by the transmitter respectively. Unfortunately, this method leads to anadjacent channel interference. In order to withstand this effect, policies are made to limitthe usage of the bandwidth. For every service area the allocation is set to be at amaximum of 70 dBμV/m for V band.This final project is aimed to analyze the power used by the transmission tobroaden the coverage area of the television services from Bandung to Garut andSukabumi. The radiation patterns enhancement and the increase of transmitted power bythe new repeaters are used. As a result, it is proved that for Garut and Sukabumi the 42dBW and 38,3 dBW are appropriate with the use of the 4-1 and 730-372 antennasrespectively in the 42nd and 44th channels. In the attained transmitted power, the adjacentchannel interference can be evaded. In case of the extending the coverage area, there arestill some particular areas which are delicate to overcome due to its geograhical contourwhich are mainly mountains., The rapid growth of various business and marketing leads to the needs of reliable,attractive, and dynamic telecommunication media. Broadcasting is one of the popularmedia which ever used in centuries. In the practical utilities, the broadcasting services usea particular radio spectrum frequency with respect to the ITU-T standard. Thebroadcasting services provide the essential informations which are directly served to thepublic user. Broadcasting is rather used to publicize the information than the radio due toits perceptibility through the sound and image repsentations. Consequently, the larger thecoverage area of the broadcasting services the more advantages can be obtained becausethe informations can be delivered properly to the user.In this final project, there are two private television provider where both arelocated in Bandung. Theirs location are alongside cities which are Garut and Sukabumi.In order to broaden their coverage area, they increased the number of repeater and thelevel of power used by the transmitter respectively. Unfortunately, this method leads to anadjacent channel interference. In order to withstand this effect, policies are made to limitthe usage of the bandwidth. For every service area the allocation is set to be at amaximum of 70 dBμV/m for V band.This final project is aimed to analyze the power used by the transmission tobroaden the coverage area of the television services from Bandung to Garut andSukabumi. The radiation patterns enhancement and the increase of transmitted power bythe new repeaters are used. As a result, it is proved that for Garut and Sukabumi the 42dBW and 38,3 dBW are appropriate with the use of the 4-1 and 730-372 antennasrespectively in the 42nd and 44th channels. In the attained transmitted power, the adjacentchannel interference can be evaded. In case of the extending the coverage area, there arestill some particular areas which are delicate to overcome due to its geograhical contourwhich are mainly mountains.]"

"Telah dilakukan penelitian untuk mengetahui pengaruh pemberian alga cokelat (Sargassum) dalam ransum terhadap pertumbuhan dan sintasan ikan nila srikandi (Oreochromis aureus x O. niloticus) yang dipelihara dengan sistem akuaponik. Terdapat 4 perlakuan dan 3 ulangan. P0 yang diberi pakan tanpa campuran Sargassum, kelompok P1 yang diberi pakan dengan campuran Sargassum 2%, kelompok P2 yang diberi pakan dengan campuran Sargassum 4%, dan kelompok P3 yang diberi pakan dengan campuran Sargassum 6%. Hasil uji anava satu faktor (P > 0,05) menunjukkan tidak adanya pengaruh nyata pemberian Sargassum terhadap pertumbuhan dan sintasan pada semua kelompok perlakuan.

---

The research was done to observe the effect of brown algae (Sargassum) in the ration on the growth and survival of Srikandi tilapia (Oreochromis aureus x O. niloticus) were maintained aquaponics system. There are 4 treatments and 3 replication. P0 mixture fed without Sargassum, P1 group fed with a mixture of 2% Sargassum, P2 group fed with a mixture of Sargassum 4%, and the P3 group fed with Sargassum mixture of 6%. The feed is given three times daily for 8 weeks. The result anova test (P > 0.05) showed no significant effect on the survival and provision of Sargassum growth in all treatment groups."

"Kultivasi alga selain dapat mereduksi CO2, juga menghasilkan produk biomassa yang bermanfaat. Dalam memproduksi biomassa Chlorella di dalam suatu fotobioreaktor, dibutuhkan parameter hidrodinamika yang benar agar didapat hasil biomassa yang optimal. Dalam penelitian ini dilakukan pemodelan dan simulasi fotobioreaktor kolom gelembung untuk kultivasi alga Chlorella. Pola aliran untuk fasa gas dan fasa cair dimodelkan dengan menggunakan konsep dispersi dengan mempertimbangkan konveksi, difusi, lapisan batas dan laju perpindahan massa antarfasa.Simulai menggunakan program dilakukan guna mengetahui pengaruh dari parameter hidrodinamika terhadap konsentrasi alga. Hasil simulasi menunjukkan bahwa semakin tinggi reaktor kolom gelembung mengakibatkan turunya hold up fasa gas dan kenaikan koefisien perpindahan massa. Berbeda dengan laju superfisial gas umpan, semakin besar laju superfisial gas umpan hold up fasa gas meningkat dan terjadi penurunan koefisien perpindahan massa.

---

Cultivation of algae in addition to reducing CO2, biomass also produces useful products. In producing Chlorella biomass in a photobioreactor, the correct hydrodynamic parameters required in order to obtain optimal biomass yield. This research is modeling and simulating a bubble column photobioreactor for the cultivation of algae Chlorella. Flow regim for gas phase and liquid phase are modeled by using the concept of dispersion taking into account convection, diffusion, boundary layer and mass transfer rate.

Simulations using program was conducted to determine the effect of hydrodynamic parameters on the concentration of algae. Simulation results show that the higher the resulting bubble column reactor hold downs and rise up the gas phase mass transfer coefficient. Unlike the superficial gas feed rate, where the greater the rate of superficial feed gas hold up increased gas phase and a decrease in the mass transfer coefficient. "

"Persaingan di Industri pengiriman barang di Indonesia semakin ketat seiring dengan pertumbuhan layanan jual beli barang melalui online (e-commerce). Pelayanan yang terbaik dan berkualitas kepada pelanggan secara berkelanjutan merupakan kunci untuk tetap bersaing dan berkembang di pasar yang semakin ketat. Penelitian ini bertujuan untuk menentukan faktor-faktor penting dalam 4 dimensi berkelanjutan yaitu dimensi ekonomi, dimensi lingkungan, dimensi sosial, dan dimensi konsumen. Sebuah model logistik berkelanjutan akan dibuat berdasarkan dimensi berkelanjutan yang telah diidentifikasi. Hasil dari kuisioner yang diberikan kepada 182 orang yang bekerja pada level manajerial dalam industri jasa logistik akan digunakan untuk membuat model ini. Sebelum menentukan variabel dan indikator pada logistik berkelanjutan, dilakukan 2 focus group discussion dan validasi oleh ahli. Indikator-indikator berkelanjutan yang telah ditentukan selanjutnya dianalisa menggunakan metode PCA (principal component analysis) dan LDA (linier discriminant analysis) untuk mengetahui faktor dan indikator yang paling mempengaruhi logistik keberlanjutan. Pengembangan model dilakukan dengan menggunakan metode SEM-PLS (Structural Equation Model Partial Least Square). Secara umum hasil penelitian menunjukkan dimensi ekonomi, lingkungan, sosiak dan konsumen memberikan pengaruh langsung dan signifikan terhadap logistik berkelanjutan dikarenakan nilai p-value <0,05 dan t-tabel > 1,96. Hal ini dapat disimpulkan apabila dimensi-dimensi berkelanjutan ditingkatkan, maka kinerja jasa logistik berkelanjutan akan semakin baik. Simulasi Model logistik berkelanjutan dengan menggunakan simulasi model dinamis, menghasilkan proyeksi valuasi model logistik berkelanjutan yang terus meningkat setiap tahunnya mulai dari 4,73% sampai dengan 13,05% dari tahun 2020 sampai 2040. Sehingga hubungan antar dimensi dan variabel dalam model logistik berkelanjutan sudah baik dalam menjaga keberlangsungan sustainabilitas perusahaan jasa logistik di Indonesia.

---

The expansion of online platforms for purchasing and selling goods (e-commerce) has resulted in increased competition within Indonesia's goods delivery sector. Managing competitiveness and expanding in an increasingly competitive market requires reliable and excellent customer service. The purpose of this study is to identify critical variables in the four sustainable dimensions of the economy, environment, society, and consumer. On the basis of the determined sustainable dimensions, a sustainable logistics model will be developed. This model will be developed using the responses to surveys provided to 182 managers in the logistics services sector. Two focus groups and expert validation were conducted prior to identifying factors and indicators in sustainable logistics. The sustainable indicators that have been determined are then analyzed using the PCA (principal component analysis) and LDA (linear discriminant analysis) methods to determine the factors and indicators that most influence sustainable logistics. Model development was carried out using the SEM-PLS (Structural Equation Model Partial Least Square) method. In general, the research results show that the economic, environmental, social and consumer dimensions have a direct and significant influence on sustainable logistics due to the p-value <0.05 and t-table > 1.96. It can be concluded if sustainable dimensions are improved, the performance of sustainable logistics services will be better. Through the use of dynamic model simulation, the sustainable logistics model is simulated and the result is a projected valuation that rises annually between 2020 and 2040, from 4.73% to 13.05%. Therefore, the relationship between the dependent variable and the independent variable in the logistic model is well-established in terms of assessing the sustainability of the logistics company in Indonesia."

"Studi avval pemanfaatan alga hijau sebagai biosorben ion Iogam PbCu” dan Co” telah dilakukan ciengan memakai metode batch, identifikasidengan FT-IR dan Kuantifikasi dengan SSA (Spektrofotometer Serapan Atom).Perbedaan konsentrasi ion Iogam mula-mula (C) ciengan konsentrasi sebelumdan sesudah perlakuan merupakan jumlah ion Iogam yang terserap (Cb).Optimasi kondisi biosorpsi biomassa alga hijau dilakukan dengan memvariasikanpH, vvaktu kontak, jumlah biomassa dan konsentrasi. Kemudian uji selektifitasIogam dilakukan dengan mengkombinasikan ion Iogam Pb, Cu dan Co dalamerlenmeyer dan dikontakkan dengan 100 mg biomassa alga hijau, sedangkanuntuk recovery dilakukan dengan cara biomassa alga hijau yang telah menyerapIogam dikontakkan dengan 25 mL asam nitrat. pH optimum biosorpsi alga hijauterhadap masing-masing ion Iogam Pb2+, Cu” dan Co” berturut-turut adalah 7,6 dan 6. \/\/aktu kontak optimum diperoleh pacia vvaktu 60 menit. Jumlahbiomassa optimum adalah pada100 mg sedangkan konsentrasi awal ion Iogamadalah 50 mg/L untuk masing-masing Iogam Pb, Cu dan Co. Hasil uji recoveryion Iogam Pb2+, Cu” dan Co” berturut-turut sebesar 75,83 %, 69,30 % dan78,49 %. Perhitungan dengan persamaan Iangmuir diperoleh kapasitas serapanmaksimum biomassa alga hijau untuk masing-masing ion Iogam Pb, Cu dan Coberturut-turut 1 0.4596 mmoL, 0.0533 mmoL, dan 0.0266 mmoL per grambiomassa alga hijau."