Judul: A design of Arduino based monitoring and recording device for refrigerated
Abstrak: Refrigeration equipment in refrigerated transportation is built to function for long periods without attention. Air temperature monitoring during transportation takes place could detect whether the equipment was functioning correctly. The solution offered in this research was to design a device to monitor and record temperature during transportation. The aim of this study was to build a system and device prototype to monitor and record temperature of refrigerated transportation and to test the performance the designed device. The device use Arduino open source microcontroller platform as the basis. The data of the temperature stored inside SD eard as a log file to report the temperature history during transportation. The device Will transmit warning to drivers and related stakeholders. Warning activity occurred the fluctuation of the container temperature reach or exceed temperature maximum threshold. Several performance tests were done, included basic feature test, recording fest, and transportation simulation test. From the result, using accuracy formula, the temperature measurement relative accuracy level of the device is 80.19% and absolute average accuracy level is 1.6 °C in 8-10 °C temperature working range.
Keyword: Arduino, Microcontroller, Refrigerated transportation, Temperature recording, Agro industrial technology, System requite ment identification, Prototype development

Judul: Desain alat transportasi ikan segar berpendingin untuk pedagang ikan keliling
Abstrak: Deterioration of fish quality after catching is still quite high at about 27 percent. It caused by mishandling of fish during transportation from the fish auction to consumers. The mishandling of fish caused by transportation equipment that used by traders use styrofoam box and plastic buckets. The equipment is not effective to implement cold chain system. The transportation equipment is difficult to apply on a motorcycle so upset the balance of driving. This study aims to maintain the quality of fresh fish and facilitate the transport of fish for fish traders by motorcycle. To achieve these objectives is done by designing the fish refrigerated container Design steps of fish refrigerated container in this study includes the identification of user needs, determination of design criteria, conceptual design, design analysis, drafting, manufacture process and performance test. Identification of user needs carried out by determining the physical characteristics of fish and motorcycles, determine the trading activities, transportation equipment capacity and the duration of the transport process. Specified design criteria of refrigerated container are : (1) fish refrigerated container can maintain the fish temperature below 10 °C, (2) fish refrigerated container using thermoelectric cooler, (3) fish refrigerated container can maintain the fish quality, (4) fish refrigerated container compatible with a motorcycle, (5) fish refrigerated container could assist the fish trading. Functional design of refrigerated container are to maintain the fish temperature below 10 °C, to place the equipment of trading activities and set the refrigerated container on a motorcycle. The container was designed using alumuninum plat of 0.5 mm thick with 33 mm thick of polyurethane insulation. A thermoelectric cooler equipped with a heatsink and heat pipes were used for maintaining a lower temperature in the container and the motorcycle accu were used for power supply. As for fish traders, a pair of container was set on a motorcycle using a suspending frame. Design analysis showed that cooling load of refrigerated container was 11.21 Watts/container. Its derived from transmission load through walls was 7.24 Watt and air infiltration when opening and closing cap of refrigerated container was 3.97 Watts. Stress analysis of suspending frame showed that the stress distribution on suspending frame maximum was 8 x 106 N/m2 and yield strength values was 5.5 x 107 N/m2, while the maximum displacement occurring was 0.072 mm. Several performance tests were conducted using load and without load. Performance tests using load were carried out in actual tradings. Performance tests without load was conducted to determine the temperature of the fish storage and determine the COP of refrigerated container. Performance tests were carried by trader to determine the fish temperature, fish quality after transport activity and determine acceptance traders. In this study, also conducted economic studies for fish transportation. The performance test results showed that the refrigerated container could maintain the fish temperature below 3 0C for 3.8 hours. The container temperature without load reaches 11.1 0C to 15.5 0C for 120 minutes and the COP volue of refrigerated container was 0.33. Organoleptic value of fish after transport activities ranged from 7.1 to 7.3 and TPC value ranged from
Keyword: container transportation, thermoelectric cooler, fresh fish, polyurethane, fish traders

Judul: Keanekaragaman Bazzania (Marchantiophyta: Lepidoziaceae) di Taman Nasional Gunung Leuser, Aceh Tenggara, Sumatra.
Abstrak: Bazzania merupakan marga besar dari lumut hati berdaun, banyak jenis-jenis dari marga ini yang persebarannya berada di hutan tropis. Keanekaragaman dan kemelimpahan Bazzania meningkat pada hutan hujan pegunungan yang sering berkabut serta berkelembaban tinggi sehingga hutan ini disebut sebagai “hutan lumut”. Marga ini memiliki karakter diagnostik yakni percabangan membentuk pola “Y”, terdapat flagel dan daun tersusun secara incubous. Laporan tentang persebaran Bazzania di Sumatra belum mencakup semua kawasan hutan pegunungan yang ada di Sumatra, termasuk Taman Nasional Gunung Leuser (TNGL). Taman nasional ini merupakan laboratorium alam yang berorientasi pada perlindungan bagi pelbagai jenis tumbuhan termasuk Bazzania. Oleh karena itu penelitian floristik ini dilakukan untuk mengeksplorasi keanekaragaman Bazzania TNGL sebagai upaya pelengkapan daftar jenis Bazzania Sumatra. Eksplorasi spesimen Bazzania dilakukan di sepanjang jalur pendakian di TNGL (1417-2900 m dpl), dimulai dari Rainforest Lodge Kedah sampai Camp Alas. Koleksi spesimen herbarium disimpan di Herbarium Bogoriense (BO). Informasi karakter morfologi yang diamati selanjutnya digunakan dalam menyusun kunci identifikasi dan mempertelakan jenis Bazzania yang terdokumentasi di TNGL. Sebanyak 13 jenis Bazzania ditemukan di TNGL, umumnya tumbuh pada substrat batang pohon, kayu lapuk, dan ranting. Marga Bazzania memiliki variasi struktur umum gametofit yaitu tipe perawakan (kekar, ramping); bentuk pertumbuhan (merayap, mendongak, menggantung); bentuk koloni (mengeset tebal, mengeset tipis), orientasi daun lateral (tersebar mendatar ketika segar maupun kering, tersebar mendatar ketika segar tetapi tergulung masuk ketika kering), susunan daun ventral (menyirap rapat, berjarak renggang). Daun lateral memiliki variasi pada karakter bentuk, ujung, tepi, pangkal daun; kehadiran struktur tambahan seperti cuping di bagian pangkal daun; keberadaan vitta, bentuk sel pada lembaran daun, dan keberadaan trigon. Daun lateral berbentuk asimetris menyegitiga, membundar, membundar telur hingga melancor-melidah; ujung daun bergigi 2-4 dengan torehan dangkal sampai dalam, atau tidak beraturan; tepi mengombak halus, bergigi halus, bergerigi; pangkal bagian dorsal menjantung, membundar dengan tambahan seperti cuping; pangkal bagian ventral lurus, membundar; vita ada atau absen; sel berbentuk isodiametris, persegi, linear; trigon kecil, besar; kutikula halus, berbingkahan. Daun ventral memiliki variasi pada karakter bentuk, tepi, ujung, dan pangkal daun, serta kehadiran bagian daun yang hialin. Daun ventral berbentuk persegi empat, persegi empat memanjang, membundar, membundar telur, menyegitiga, mengginjal; ujung berjelabir, bergerigi, bergigi, rata; tepi mengombak sederhana, bergigi, bergerigi, bercuping dangkal, bercuping dalam; pangkal bebas, atau satu atau kedua sisinya melekat pada daun lateral; hialin absen, semua bagian daun ventral tersusun sel hialin, tidak semua bagian semua bagian daun ventral berhialin. Terdapat 5 jenis Bazzania diketahui sebagai rekaman baru untuk Sumatra yaitu Bazzania horridula, B. adnexa, B. angustifolia, B. fauriana, dan B. oshimensis; empat jenis terakhir juga merupakan rekaman baru untuk Malesia. Bazzania horridula telah dilaporkan ada di Jawa. Persebaran B. adnexa sebelumnya hanya dilaporkan di Australiasia dan China Selatan. Bazzania angustifolia, dan B. fauriana dilaporkan ada di Jepang, Vietnam Utara, Taiwan. Persebaran B. oshimensis meliputi wilayah Asia dan Indo-China (Vietnam, Thailand, Burma, Formosa, Ceylon, India dan Jepang). Kelima jenis tersebut menambah jumlah jenis Bazzania Sumatra yang sebelumnya dilaporkan sebanyak 38 jenis, sekarang menjadi 43 jenis.
Keyword: Bazzania, bryophyta, Gunung Leuser-Aceh, Lepidoziaceae, lumut hati