bluuebunny/crossref_metadata_2025 huggingface dataset:
SoTL in the Margins: Teaching-Focused Role Case Studies
Authors: Simmons Nicola , Scharff Lauren , Eady Michelle , Gregory Diana
Published: March 2021

The number of teaching-focused faculty (TFF) continues to increase, raising concerns about opportunities to engage in the Scholarship of Teaching and Learning (SoTL) for academics who are hired to focus on teaching rather than research. Various names for these teaching-focused positions include, but are not limited to: instructional, limited-term faculty; permanent, but not eligible for tenure; equivalent to tenure-track (eligible for tenure); and casual teaching-focused. Regardless of title, TFF face a unique challenge: hired for excellence in teaching and committed to improving teaching and learning, they are often not granted support to engage in professional development or research related to teaching and learning. These and other challenges are associated with their academically marginalized positions. The authors are members of the Advocacy Committee of the International Society for the Scholarship of Teaching and Learning (ISSOTL). This paper builds on a session we offered at the ISSOTL conference in Calgary in 2017 where we invited TFF to contribute narrative examples of institutional SoTL challenges and their strategies for overcoming them. We describe potential solutions to creating institutional cultures that are supportive of TFF engaging in SoTL. We finish by offering recommendations for creating a SoTL teaching-focused community within ISSOTL to provide social and professional support.
Pertanggungjawaban Pidana Tindak Pidana Pemerasan Dengan Modus Operandi Penyebaran Ransomware Cryptolocker
Authors: Tajriyani Nur Syamsi
Published: March 2021

Tindak pidana pemerasan melalui sistem elektronik dalam kasus penyebaran ransomware cryptolocker merupakan hal yang baru di Indonesia. Hal ini terlihat dari belum adanya putusan pengadilan mengenai kasus penyebaran ransomware cryptolocker. Modus operandi penyebaran ransomware cryptolocker yang cukup kompleks merupakan sesuatu yang harus diperhatikan dalam hal penerapan hukumnya oleh karena serangkaian perbuatan tersebut melingkupi beberapa tindak pidana yaitu pemerasan dan pengancaman, perusakan, dan mengakibatkan terganggunya sistem elektronik. Pelaku yang merupakan orang yang memiliki ilmu lebih tentang teknologi juga menjadi kesulitan tersendiri karena minimnya informasi mengenai pelaku yang bisa didapatkan. Penelitian ini memiliki sasaran berupa bagaimana modus operandi dan pertanggungjawaban pidana pelaku tindak pidana pemerasan melalui sistem elektonik dalam kasus serangan ransomware cryptolocker.
Kajian pemanfaatan agregat lokal kalimantan selatan sebagai material perancangan beton normal
Authors: Prasetia Irfan , Krasna Wiku A
Published: March 2021

Penelitian ini bertujuan untuk mengetahui kuat tekan beton dengan variabel agregat dan air dari beberapa lokasi kuari di Kabupaten Tanah Laut dan Kabupaten Banjar Kalimantan Selatan. Pada penelitian ini telah dilakukan pemeriksaan bahan campuran beton (baik kerikil, pasir dan air yang digunakan), pembuatan rencana campuran beton, serta hasil uji tekan sampel beton dan rekomendasi yang dapat diberikan. Pada penelitian ini menggunakan acuan pembuatan campuran beton (Job Mix) sesuai dengan Peraturan Menteri Pekerjaan Umum No. 11/PRT/M/2013 tentang Pedoman Analisis Harga Satuan Pekerjaan Bidang Pekerjaan Umum. Untuk kerikil yang diuji yaitu batu batu split Katunun, batu split gunung Martadah dan batu split gunung Awang Bangkal. Adapun air yang diuji adalah air dari sungai maluka dan awang bangkal. Adapun air PDAM juga digunakan pada sampel kontrol. Adapun faktor air semen ditetapkan sebesar 0.5 terkecuali campuran beton dengan agregat Awang Bangkal dan air PDAM yang menggunakan faktor air semen 0.4, 0.45 dan 0.5. Dari penelitian ini diketahui bahwa agregat batu gunung Martadah memberikan nilai kuat tekan yang lebih konsisten. Adapun untuk struktur beton dengan kekuatan sedang, penggunaan agregat Awang Bangkal sangat direkomendasikan. Sedangkan ketiga jenis air yang diujikan pada penelitian ini dapat digunakan dalam campuran beton.  Kata kunci: agregat lokal, campuran beton, kuat tekan beton
Pembuatan Briket Dari Kulit Buah Langsat
Authors: Ni`mah Lailan
Published: March 2021

Meningkatnya kebutuhan dan harga bahan bakar serta usaha mengurangi emisi CO2 guna mencegah terjadinya pemanasan global telah mendorong penggunaan energi biomassa sebagai pengganti energi bahan bakar fosil seperti minyak bumi dan batu bara, sebagai bahan bakar alternatif yang efisien dan ekonomis untuk kebutuhan sehari-hari Contoh energi biomassa, yakni briket.Briket bioarang adalah arang (salah satu jenis bahan bakar) yang dibuat dari aneka macam bahan hayati atau biomassa. Bahan yang dapat dibuat briket bioarang adalah kulit buah langsat. Penelitian briket biorang dari kulit langasat, bertujuan untuk mengetahui karakteristik dari briket yang dihasilkan, yakni nilai kalor. Variasi karbon kulit langsat dengan perekat tapioka yakni 75:25; 50:50 dan 25:75. Dari penelitian ini diperoleh nilai kalor tertinggi yang diperoleh dalam penelitian ini, yakni pada perlakuan C, dimana komposisi bahan pembuat briket yaitu Kulit Buah langsat : Tapioka (75% : 25%) yaitu 5558 kal/gr dan telah memenuhi Standar Nasional Indonesia (SNI) dengan nilai minimal 5000 kal/gr. Sedangkan, nilai kalor terendah adalah pada perlakuan A yaitu 5061 kal/gr dengan komposisi Kulit Buah langsat : Tapioka (25% : 75%). Hal ini disebabkan karena adanya perbedaan komposisi bahan pembuat briket bioarang sehingga memberi pengaruh berbeda terhadap nilai kalor.
Analisis Daya Dukung Pondasi Menggunakan Hasil Uji CPT Dan Uji Laboratorium Pada Bangunan Guest House
Authors: Suroso Priyo , Tjitradi Darmansyah
Published: March 2021

Perkembangan suatu daerah akan diikuti pula perkembangan dibidang jasa konstruksi. Dalam pembangunan, factor keamanan suatu bangunan sering luput dari perhatian hal ini sangat perlu untuk ketenangan dan kenyaman pemakainya. Kestabilan suatu bangunan gedung, daya dukung tanah sebagai pijakannya harus diketahui terlebih dahulu sebelum dibangun. Uji-uji untuk mengetahui sifat-sifat tanah, berguna mengetahui daya dukung tanah yang dapat dilakukan di lapangan maupun di laboratorium. Salah satu uji di lapangan yang praktis dan mudah dilakukan adalah uji CPT (sondir), Analisis dari uji ini dapat diterapkan dalam menentukan dimensi dan jenis pondasi yang dipergunakan. Rencana pembangunan Guest House analisis pondasinya berdasarkan hasil uji CPT kombinasi dengan uji laboratorium dan metode analisisnya menggunakan metode Skempton (1951) untuk pondasi dangkal dan metode Bagemenn (1965) pondasi tiang. Hasil analisisnya diperoleh pondasi dangkal yang bangunannya beban ringan dapat digunakan dimensi pondasi bujur sangkar ukuran 0,75 m dan 1 m sampai kedalaman 2m. Hasil yang diperoleh untuk pondasi tiang dapat digunakan tiga model bentuk segitiga, bujur sangkar dan lingkaran.Kata kunci: CPT, pondasi, penurunan, daya dukung,
PERBANDINGAN SUHU PENYIMPANAN ELEKTRODA TERHADAP KEKERASAN BAJA KARBON
Authors: Gumono Gumono , Hadi Syamsul , Irawan Bambang
Published: March 2021

The welding is the process of connecting two metals, where factors that
influence are current, voltage, plate thickness, gap shape and heating temperature
of the electrode. The heating of this electrode aims to stabilize the arc arising
during welding.
The objective of the study was to determine the maximum hardness of low
carbon steel welding with E 7018, with temperature of electrode storage at
temperature 50, 75 and 100 ° C. Determine the maximum change in the hardness
of the welded by using heated electrodes preheated to an initial temperature of 50,
75 and 100 ° C. Compare its hardness to the standard. The specimen-making
method is based on JIS Z 3121, further data are compared against the standard.
The result of maximum hardness value for slit I is 175HV and for slit V
264HV in weld area with temperature 75 ° C, hardness change of 33HV for
temperature 100 °C.
ANALISIS UNJUK KERJA VENTURI VAKUM DENGAN VARIASI DIMENSI DAN VISKOSITAS FLUIDA
Authors: Takwim R.N. Akhsanu , Witono Kris
Published: March 2021

In the venturi vacuum, to produce a vacuum condition, a liquid fluid flow is
required which is driven by a centrifugal pump through the venturi passage. The
amount of vacuum pressure generated by venturi is influenced by the increase of flow
velocity due to the diminution of the cross-section which follow Bernoulli principle.
The flow velocity on the channel is influenced by the discharge generated by the
pump following the continuity law. In addition to speed, channel input pressure is
also a variable that affects venturi vacuum pressure. Performance of a setrifugal pump
in the form of flow and pressure discharge greatly affect venturi vacuum
performance, so that the variables affecting the performance of a setrifugal pump
such as fluid viscosity, will also affect the venturi vacuum performance.
Therefore, it is necessary to evaluate the effect of viscosity and venturi dimension on
vacuum pressure and discharge into the main objective of this study so that the
variables can improve the venturi vacuum pump performance.
In this study liquid fluid with three variations of viscosity flowed through three
different venturi dimension variations. Then measured parameters that occur, such as
fluid flow fluid flow, fluid pressure fluid and vacuum pressure that occurs in the tube.
From this study obtained, at the angle of diffuser 5o the lowest vacuum pressure of -
66.75 cmHg occurs in water fluid with viscosity of 17 centipoise. Similarly, at the
angle of the diffuser 6.5o the value of the lowest vacuum pressure is also produced by
a water fluid of -68 cmHg which is the lowest value compared to other diffuser angles
and other fluid viscosities. While at 8o diffuser angle, the lowest vacuum pressure
value is also produced by water fluid of -64.5 cmHg.
EVALUASI KUALITAS PASIR PADA PROYEK BANGUNAN PEMERINTAH DENGAN METODE STATISTIK INFERENSIAL
Authors: Rifabi Dedy , Fajrin Jauhar , Ansari Buan
Published: March 2021

Sand is one of the key material in civil engineering, which is sometime overlooked during the construction process. In many projects, the first concern is about the structure and then the material. The improper use of material doesn’t show significant signs in the early stage of building service. Using low quality material may give significant impact after few years and when it comes to a concern, it’s always too late to be repaired. Sand has drawn many attentions in term of its quality and few works dealing with this topic have been reported. This study aims to asses the quality of sand collected from few government building projects in west Lombok. The results were analysed using statistic software, which is SPSS 16.0, to provide inferential analyses. A mixed model, namely field surveys and laboratory experiments, were employed for the research methodology. It was found that only one out of the seven project that used proper sandmin terms of quality. The rest do not meet the standards required by SNI (Indonesian Nasional Standard) for sand material. It was also found that the quality of sand used by the observed projects under this research was significantly differ from each other, in terms of their bulk density, apparent specific density, SSD specific density, water absorption, silt content, loose content weight, solid fill weight, and fine modulus. It is strongly recommended that the government should take a good control to the sand suppliers/providers as well as the builders especially when they are involving in the government projects.
PENGARUH PERSENTASE BIODIESEL MINYAK JELANTAH - SOLAR TERHADAP KARAKTERISTIK PEMBAKARAN DROPLET
Authors: Nugraha Andy , Ramadhan Muhammad Nizar
Published: March 2021

Fossil fuels need to be replaced with alternative energy sources such as household waste, used cooking oil. This research utilizes household waste such as used cooking oil as an alternative fuel. In this research biodiesel used waste cooking oil mixed with diesel with a percentage of 50%: 50%, 60%: 40%, 70%: 30%, 80%: 20%, and 90%: 10%. The mixture of waste cooking oil and diesel biodiesel was then made into a 1 mm droplet grain, then a droplet combustion test was carried out. The test results show that the value of ignition delay time increases with increasing percentage of biodiesel used waste cooking oil. The burning rate value increases with the increase in the percentage of used waste cooking oil biodiesel. The temperature value increases with the increasing percentage of biodiesel used waste cooking oil. The maximum fire height value that can be achieved decreases with increasing percentage of used waste cooking oil biodiesel.
PENGARUH FRAKSI VOLUME PENGUAT 2, 2,5 DAN 3% SERAT BAMBU HAUR DAN FIBERGLASS TERHADAP KEKUATAN TARIK MATRIKS POLIESTER
Authors: Raliannoor Raliannoor , Rahmalina Dwi
Published: March 2021

Against the backdrop of the increasing need for quality composite materials and the development of increasingly advanced composite manufacturing technology in the machinery industry. The aim of this research is to develop composite materials with bamboo fiber reinforcement and glass fiber as an alternative to automotive raw materials to replace plastic. Preparation of composite specimens with each reinforcement with volume fractions of 2%, 2.5%, and 3% and specimens without reinforcement or 0% volume fraction as a comparison.
The polymer material used is Yukalac 157-EX BQTN polyester as its matrix. With haur bamboo fiber and fiberglass as a reinforcement. Making specimens using the hand lay up method. Tests carried out are composite specimen tensile tests. Tensile testing was carried out using the ASTM D 638M-84 M-1 standard.
Based on the test results, it was concluded that the effect of fiber volume fraction on the characteristics of composite samples for tensile tests. Composite strengthened by haur bamboo and fiberglass powder at 3% heavy volume fraction has the most ideal characteristics that have a tensile strength of 53.581 MPa, modulus of elasticity of 87.452 MPa and polymer composite material with a strength of haur bamboo and fiberglass powder with a length of 5 mm at 3% reinforcing volume fraction can be used as an alternative to automotive raw materials, namely replacing polyoxymethylene plastic materials for the front bumper.
PENGARUH PANJANG KONDENSOR TERHADAP KINERJA TERMAL THERMOSYPHON
Authors: Astuti Fina Andika Frida , Fachrudin Arif Rochman
Published: March 2021

Cooling is an important activity in maintaining a large temperature of a component, both mechanical components and electronic components. Component temperature which is maintained from overheating will avoid damage. The cooling process is carried out by moving the heat produced by a component through a heat exchanger. One effective heat exchanger is Thermosyphon. This tool is able to move a number of heat through a very small surface area. Thermosyphon is a pipe that contains a working fluid, consisting of three parts, namely the evaporator section, the adiabatic section and the condenser section. The evaporator has the function of absorbing heat from the heat source and heat is released in the condenser. The process of heat absorption and release of heat is carried out by the working fluid in the pipe, when the fluid is in the heated evaporator it will evaporate towards the condenser the heat is released. The fluid which is finally from the condenser returns to the evaporator.
This study aims to determine the thermal performance of the thermosyphon as a heat exchanger with condenser length variations. Thermosyphon is designed with a condenser length variation of 44 cm, 66 cm, 88 cm, 110 cm and 132 cm running with variation temperature.
The results showed that, the highest thermal resistance at the shortest condenser length at 400C (140C / W) and the lowest at the longest condenser length at 1200C (10C / W). At all temperatures, all variations in the length of the condenser will increase the output power and heat flux. At the same condenser length, the higher the temperature, the greater the heat flux and output power. The process of this experiment is most effective at the length of the condenser 1.25 (132 cm) from the length of the evaporator length, because after that the value of thermal resistance and output power will experience a permanent tendency.
MEMANFAATKAN CONDENSATE HYDROCARBON NATURAL GAS SEBAGAI FUEL GAS DENGAN PENGATURAN KONDISI OPERASI ALAT HEAT EXCHANGER
Authors: Sulardi Sulardi
Published: March 2021

One of the problems faced in operating the fuel gas system is the loss due to wasting condensate hydrocarbons from the fuel gas system surge drum. The purpose of the study was to determine the factors that cause natural gas condensation problems in the fuel drum supply surge gas and provide an overview of how to overcome the problem with the heat exchanger tool operation method. The method used in the research is the research method used with a case study approach to handling wasted condensate hydrocarbon problems and how to overcome them by maximizing the operation of heat exchanger devices. The expected results from this study are that the removal of hydrocarbon condensate can be prevented and utilized as fuel gas. With the results of this study, it is expected to be an innovation in order to adding value to value creation for the company.
PROTEKSI PIPA BAWAH LAUT DENGAN METODE ARTICULATED CONCRETE BLOCK MATTRESSES
Authors: Sulardi Sulardi
Published: March 2021

One of the problems in the operation of pipelines for oil and gas through the sea is the
damage and failure submarine pipe line (SPL). The purpose of this study is to provide
an overview of the factors and causes of damage and failure of the submarine pipeline
which results in the cessation of the supply of feed intake of crude oil to the oil refinery
unit. The method used in this research is a application research with a case study
approach to the handling of problems with damage and failure of submarine pipelines,
how the replacement and how to protect it is most suitable and in accordance with
applicable regulations. The results showed that the protection of submarine pipelines
with articulated concrete block matresses and immersion as deep as 2 meters had
completed the regulatory aspects and were safe against the effects of collisions and
dragged ship anchors. The results of this study also recommend that this protection
method can be replicated to overcome similar problems in other work units.
SISTEM INFORMASI PENILAIAN PROPOSAL SKRIPSI BERBASIS WEB DI FAKULTAS TEKNOLOGI INFORMASI UNIVERSITAS ISLAM KALIMANTAN MUHAMMMAD ARSYAD AL BANJARI BANJARMASIN
Authors: Ratna Silvia
Published: March 2021

Implementation of the final project or thesis for students is a tiered process and bound to
one another. Starting from the stage of proposal submission, proposal presentation,
research implementation, report making up to thesis examination students. At present,
the implementation of the thesis trial evaluation at the Information Technology Faculty
of the Islamic University of Kalimantan Muhammad Arsyad Al Banjari Banjarmasin is
still manual, where when the presentation of proposals and panelists thesis examinations
or examiners are given an assessment form using paper media. This assessment form is
then recapitulated into a spreadsheet form the results are announced to students. This is
less effective, especially when many students take thesis courses. For this reason, in this
study, a thesis evaluation information system was created, to help all stages of the thesis
evaluation process. To facilitate the accessibility of the system made web-based and
integrated with existing academic systems. From the test results concluded, the system
can run by the design and reports produced by the system following the processes that
are running now.
LAJU PENDINGINAN PENGELASAN BAJA CARBON SEDANG PADA TEMPERATUR LINGKUNGAN BERBEDA
Authors: Takwim R. N. Akhsanu , Witono Kris , Udianto Pondi
Published: March 2021

The quality of welding results is influenced by the shape of the microstructure of the welding material especially in the HAZ region. The shape of the welding microstructure is largely determined by the cooling rate of the weld material. The cooling rate of the weld is greatly influenced by the heat input from the arc and the ambient temperature. This study aimed to determine the effect of different environmental temperatures on the cooling rate of welding results. Welding of GMAW fillets on medium carbon steel plates S50C, with variations in welding currents 90 A, 100A and 110A and carried out at variations in environmental temperature of 15oC, 10oC and 5oC. Temperature data on the middle, welding part is taken with a digital thermometer to compare the effect of each variable. The test results show that the greater the welding current, the slower the cooling rate. Similarly, an increase in ambient temperature causes a decrease in the weld metal's cooling rate.
PENGARUH JUMLAH DAN SUDUT PEMASANGAN SUDU TERHADAP DAYA TURBIN SAVONIUS
Authors: Purwoko Purwoko
Published: March 2021

The problem in Energy conservation is finding new opportunities for high-efficiency energy generation including wind power generating machines. Aims of this study to determine the effects of blade number and curv angle of blade mounting on the output power of a Savonius type wind turbine. This low speed wind turbine is intended to get energy at the top of a multi-storey building in an urban area. Tests were carried out on a laboratory scale, using savonius wind turbines with 400 mm diameter and 500 mm height. The driving wind speed of the turbine is set between 1.5 to 8.5 m / s. While the number of blades used is 2 types, namely rotor with three blades and rotor with 4 blades, each of which is tested on 3 different types of curv angle blade.
The investigation results are expected to show that the wind tubing from each experiment will give different characteristics. This investigation results that there was increasing in efficiency in the savonius turbine with blades. The highest rotation and power occur when the turbine uses 2 blades and -50 curv angle of blade mounting
PONDASI BALIK KOTAK DITANAH LUNAK
Authors: Sulardi Sulardi , Widodo Pria Agung , Suprayitno Abdi , Ryka Hamriani , Afifah Rohima Sera , Waskita Kukuh Jalu
Published: March 2021

The problem is the difficulty in determining the type and method of manufacture and installation of foundation on soft soils. The research objective is to provide an overview of the type of foundation, the method of manufacture and the method of installation of the foundation which is suitable and suitable in the soft soil environment. This research method uses used research methods with trial and error, and with a case study approach method, namely the case of difficulties in overcoming the problem of the availability of permanent structural support foundations and refinery operation equipment on soft soil. The results showed that the type and shape of the foundation that is suitable and to solve the problem is the foundation behind the box. This foundation specification is an inverted box with reinforced concrete material and certain dimensions with cover plates. The results of this used research also show that the inverted box type of foundation is suitable for supporting equipment supporting refinery operations such as pipe supports and other refinery operation equipment.
STUDI EKSPERIMENTAL PENGGUNAAN BOSS CAP FINS UNTUK MENINGKATKAN EFISIENSI PADA PROPELLER
Authors: Yuana Budi Rolly , Sadiah Siti , Siswanto Kristian Hadi , Leksono Setyo
Published: March 2021

The phenomena of cavitation which occurs when the propeller work can cause adverseeffects. One of them is the ship would miss the thrust so that the speed can not beachieved as expected. Various experiments and researches have been done in an effort toobtain maximum results by reducing or even eliminating cavitation occurring.One of these efforts is to reduce or eliminate cavitation occurring on the hub vortex. Thisis done by modifying the propeller without changing the original design self. Thepropeller boss cap is modified by adding fins / fin, and then examines the differencesbetween the cavitation that occur with a standard cap boss the modified. It is thencalculated how big the impact on the efficiency of the propeller. In this study, propellermodels of type B series 4:45 (model no. 3468) is used. The test conducted in thecavitation tunnel Laboratory for Hydrodynamics, BPP Technology in Surabaya.From the results of efficiency measurements and observations conducted cavitation it wasfound that modifications made to be able to eliminate the hub vortex cavitation therebyincreasing the efficiency up to 8.58%.
PENGARUH JUMLAH SUDU TERHADAP KINERJA TURBIN ANGIN SUMBU VERTIKAL TIPE DARRIEUS-H NACA 3412 DENGAN SUDUT PITCH 00
Authors: Fachrudin Arif Rochman
Published: March 2021

Potential and utilization of renewable energy in Indonesia is still very small. Oneof the renewable energy sources is wind energy. The use of wind turbines, windenergy is converted into mechanical energy and can then generate electricitythrough a generator. Wind turbines are environmentally friendly, inexpensive,easy to operate and easy to maintain. The purpose of this study was to determinethe effect on the performance of the number of blades and wind speed for thevertical axis wind turbine type darrieus H with the NACA profile 3412 with apitch 0o angle. This study uses an experimental method, with a number of bladesand varying wind speeds. The number of blades given is 2 units, 3 units and 4units. The speed of the given wind is 3.3 m / s, 3.5 m / s, 3.7 m / s, and 3.9 m / s.Performance is obtained from the electrical power produced by a generatormounted on the turbine axis. The results showed that the turbine performance wasinfluenced by the number of blades. The highest power in the number of bladeswas 4 units at a wind speed of 3.3 m / s which resulted in electric power of 5.166Watt. The lowest electric power is produced on turbines with a number of units of2 units at a wind speed of 3.3 m / s, which is 3.0173 Watts. The blade is 2 unitsand 3 units, at a wind speed of 3.3 m / s; 3.5 m / s; 3.7 m / s and 3.9 m / s, theelectrical power produced is relatively the same, while in blades 4 units, thedifference in wind speed (3.3 m / s; 3.5 m / s; 3.7 m / s and 3.9 m / s) produce adifference in the electrical power produced
ANALISIS PERBANDINGAN SIFAT MEKANIS PIPA TEMBAGA AC BARU DAN BEKAS
Authors: Takwim R.N. Akhsanu , Witono Kris , Irawan Bambang
Published: March 2021

In the repair of the installation of air conditioners or refegeration are oftenfound referigeran (ACR) tube that must be replaced because the old copper tubeleaked on the connection. Replacement is done because the repair of the connectionby cutting and flaring the connection usually fails in the form of a tear on the flaredpart.The cause of flaring failure in the used air conditioner tube by testing themechanical properties and the microstructure of the material and compared with themechanical properties and the microstructure of the new tube material.Knowing thecauses of the failure can be searched for the prevention and repair solutions so thatthe old tube can be used without replacement.The tensile test results showed that the average ultimate strength of the usedACR copper tube has increase in strength of 18188.65 N/mm2 comparing with theultimate strength of the new copper tube which was only 14615.15 N/mm2.The microVickers test results show the same phenomenon from the tensile test results, wherethe hardness value of used ACR tube has 42.7 HV while the new ACR tube is 37.8HV.Microstructure testing with SEM shows the changing in grain structure from alongitudinal shape with a large enough grain size and tenuous in a new tube, to moreflat and dense longitudinal grain structure for used tube.
PEMBELAJARAN MENYIMAK TEKS ANEKDOT KELAS X KECANTIKAN SMKN 4 BANJARMASIN
Authors: Hafifah Nur , Fatah Yasin Moh. , Taqwiem Ahsani
Published: March 2021

Tujuan penelitian ini  untuk mendeskripsikan perencanaan pelaksanaan pembelajaran,  proses pelaksanaan pembelajaran, dan evaluasi pembelajaran menyimak teks anekdot pada kelas X Kecantikan SMKN 4 Banjarmasin. Penelitian ini menggunakan pendekatan kualitatif. Metode penelitian ini yaitu dengan mengumpulkan data melalui observasi, wawancara, dan dokumentasi. Hasil penelitian ini mendsikripsikan pelaksanaan pembelajaran menyimak teks anekdot di sekolah. Dalam pembelajaran pelaksanaan ada tiga tahap yaitu perencanaan, pelaksanaan, dan evaluasi. Kegiatan perencanaan RPP sesuai dengan kurikulum 2013, guru sudah membuat RPP yang terdiri dari indikator, materi, kegiatan pembelajaran, penilaian, media, bahan dan sumber belajar beberapa komponen yang tidak dimasukkan oleh guru yaitu alokasi waktu dan metode yang digunakan. Guru juga tidak memasukkan tujuan pembelajaran. Pelaksanaan terdiri dari tiga kegiatan yaitu pendahuluan, kegiatan inti (pendekatan saintifik), dan kegiatan penutup. Tahap evaluasi guru berdasarkan presentasi di depan kelas dan keaktifan dalam pembelajaran dan untuk penilaian dilihat dari hasil unjuk kerja kelompok.
UTILIZATION OF CHITOSAN FROM SHRIMP SHELLS WASTE FOR REDUCTION IRON (Fe) METAL CONTENT IN MARTAPURA RIVER
Authors: Wijayanti Hesti , Wahdi Hijratul , Nooryanto Winardi
Published: March 2021

The Martapura River in South Kalimantan contains quite high levels of metals, namely Fe metal which allows the presence of excessive metal elements. According to KEPMENKES, clean water standards contain Fe of 0.3 mg/L. Based on testing, the Fe content contained in the Martapura River water was 2.8 mg/L. One effort to reduce the content of these metals is using adsorbents made from shrimp shells. This shrimp shell waste contains chitin, so if further treatment is given, it is expected to be used as an adsorbent to reduce Fe levels in the Martapura River.The study was conducted using shrimp shells with sizes of 1000 microns, 710 microns and 500 microns. This shrimp shell is deproteinized, the shrimp shell is added with a 3.5% NaOH solution (w/v). Then the demineralization process is carried out, where the dry residue obtained from the previous process is added with 1N HCl solution in a ratio of 1:15 (w/v). From this process chitin is produced, then chitin is deacetylized with 50% NaOH (w/v). Then the samples were tested with a DR-2500 spectrophotometer after being passed to a continuous adsorption device. From the results of the study, it was found that chitosan is very effective in reducing Fe metal content in the Martapura River, the quality of clean water produced reaches the clean water quality standards set. The results of the study at 500 microns size obtained the smallest Fe metal content of 0.05 mg/L.
TRADITIONAL MARKET SOLID WASTE MANAGEMENT STUDY IN KEPANJEN, MALANG DISTRICT
Authors: Hardianto Hardianto , Sudiasa I Nyoman , Sari Shendy Hilda
Published: March 2021

Traditional markets are commercial areas that produce household-type solid waste so that the generation, composition, and the characteristics of the solid waste in Kepanjen Market will be different. This research is related to the reduction potential to improve solid waste management with the aim of determining the generation, composition, characteristics, collection and the transportation of the solid waste. The data used in this study include operational technical solid waste data, as well as secondary data such as area, number of traders, solid waste management resources, collection facilities, transportation routes, supporting maps. Solid waste generation calculation uses load-count analysis method. Calculation of solid waste composition uses the crossroad method. Calculation of physical characteristics includes specific gravity of solid waste. Calculation of transportation of solid waste uses the Hauled Container System method. Mass balance is analyzed using recovery factor values. The results of the analysis show that the solid waste generation average is 2.94 m3/day, with a specific gravity of 190.03 kg/m3. The highest composition of solid waste is food solid waste by 28.67% and vegetable and fruit solid waste by 22.67%. These components can be used as compost raw materials. The potential reduction with the mass balance method shows that the residue is 201.49 kg/day, reduction scenario can reduce solid waste by 36.06% of the total load that must be transported to the Final Processing Site. The solid waste transport result with the capacity/size of 6-10 m3 of a transport vehicle (arm roll truck) shows that the effective working hours for 8 hours can pick up the solid waste in 1 trip, and the transport fleet can serve other markets.
A Contextual Foundation for Mechanics, Thermodynamics, and Evolution v.5
Authors: Crecraft Harrison
Published: March 2021

The prevailing interpretations of physics are based on deeply entrenched assumptions, rooted in classical mechanics. Logical implications include: the denial of entropy and irreversible change as fundamental physical properties; the inability to explain random quantum measurements or nonlocality without untestable and implausible metaphysical implications; and the inability to define complexity or explain its evolution. We propose a conceptual model based on empirically justifiable assumptions. The WYSIWYG Conceptual Model (WCM) assumes no hidden properties: “What You can See Is What You Get.” The WCM defines a system’s state in the context of its actual ambient background, and it extends existing models of physical reality by defining entropy and exergy as objective contextual properties of state. The WCM establishes the irreversible production of entropy and the Second law of thermodynamics as a fundamental law of physics. It defines a dissipative system’s measurable rate of internal work as an objective measure of stability of its dissipative process. A dissipative system can follow either of two paths toward higher stability: it can 1) increase its rate of exergy supply (and maximize entropy production) or 2) utilize existing exergy supplies better to increase its internal work rate and functional complexity. These paths guide the evolution of both living and non-living systems.
Image Accessibility for Screen Reader Users: A Systematic Review And A Road Map
Authors: Oh Uran , Joh Hwayeon , Lee Yunjung
Published: March 2021

A number of studies have been conducted to improve the accessibility of images using touchscreen devices for screen reader users. In this study, we conducted a systematic review of 33 papers to get a holistic understanding of existing approaches and to suggest a research road map given identified gaps. As a result, we identified types of images, visual information, input device and feedback modalities that were studied for improving image accessibility using touchscreen devices. Findings also revealed that little has studied how to automate the generation of image-related information, and that screen reader users play important roles during the evaluation but the design process. Then we introduce two of our recent studies on the accessibility of artwork and comics, AccessArt and AccessComics respectively. Based on the identified key challenges, we suggest a research agenda for improving image accessibility for screen reader users.
Senyawa Golongan Limonoid dari Tanaman Genus Chisocheton dan Aktivitas Antikankernya
Authors: Tambunan Ghina Uli Felicia , Nurlelasari Nurlelasari , Gaffar Shabarni
Published: March 2021

Indonesia merupakan negara yang kaya akan keanekaragaman hayati. Terdapat banyak tanaman yang mengandung senyawa metabolit sekunder yang memiliki aktivitas biologi sehingga berpotensi untuk digunakan sebagai obat, salah satunya adalah genus Chisocheton. Tanaman genus Chisocheton sudah banyak dilaporkan mengandung senyawa triterpenoid, seskuiterpenoid, limonoid, steroid, dan fenol. Limonoid merupakan turunan triterpenoid yang paling banyak ditemukan pada tanaman genus Chisocheton. Lebih dari tiga puluh senyawa golongan limonoid telah diuji aktivitas antikankernya terhadap beberapa jenis sel kanker manusia, seperti sel kanker payudara, mulut, paru-paru, leukimia, serviks, dan hati. Beberapa senyawa limonid tersebut diketahui memiliki aktivitas sitotoksik yang tinggi dengan kisaran nilai IC50 1,67 − 50,27 µg/mL. Review ini memaparkan beberapa senyawa limonoid yang diisolasi dari genus Chisocheton, aktivitas sitotoksiknya terhadap sel-sel kanker manusia, serta hubungan struktur dan aktifitas biologisnya (SAR = Structure Activity Relationship). Selain itu beberapa penelitian juga sudah melakukan penelitian lebih lanjut seperti pengujian induksi apoptosis dan penentuan tingkat ekspresi gen-gen yang berhubungan dengan apoptosis. Penelitian-penelitian yang dilakukan ini mengarah pada pencarian senyawa baru yang dapat digunakan sebagai lead compound untuk mendapatkan obat antikanker yang efektif.

Limonoid Compounds from Genus Chisocheton Plant and Its Anticancer Activity. Indonesia is a country with a large biodiversity. There are many plants contain secondary metabolite compounds with biological activity, such as Chisocheton genus. The Chisocheton is reported as plant with triterpenoids, sesquiterpenoids, limonoids, steroids and phenols content. Limonoids arethe derivative of triterpenoid which mostly found in Chisocheton genus. More than thirty limonoids have been studied for their anticancer activity against several types of human cancer cells, such as breast, mouth, lung, leukemia, cervical, and liver cancer cells. Some of these limonoids are known to have high cytotoxic activity with the IC50 values of 1.67 − 50.27 µg/mL. This review discuss many kind of limonoid compounds isolated from Chisocheton, their cytotoxic activity against human cancer cells, and their structural activity relationship (SAR) study. This review also discusses some research result for further studies of Chisocheton wether in the mechanism of apoptosis induction and also the determination genes level expression or proteins associated with the apoptosis. This review reveals the important of the study to find a new compounds for an effective anticancer drug.
New Solar Thermal Materials
Authors: Journal Baghdad Science
Published: March 2021

A number of ehemical ion materials were used as an absorber against solar energy. These materials were selected according to their absorption spectra in the wavelength range 300-800nm where the solar spectrum is coventrated. A solar olleetorw^esigd and The ability of each material inside the collector for absorbing the solar radiation was examined by a converter parameter “R”.According to the “R” parameter, the cohaltous and copperic ions material seems to be of higher capability for absorbing solar energy than the other materials.All the results were analyzed by means of a least-squared fitting program.
Effect of growth regulators on sex expression and some quantitatve properties
Authors: Jomaa Faroq Farag , Karomi Mushtaq Farag
Published: March 2021

This study was conducted in an orchard pomegranate's Department of Horticulture College of Agriculture, University of Baghdad for two seasons 1999-2000 on cultivars pomegranate Salimi and narrators seedless to study the effect spraying Nizant growth in sex ratio of flowers and recipes flowering and winning was selected 27 trees per class 15 years old planted
Synthesis of some polyimides by different methods
Authors: Al-Salami Firyal
Published: March 2021

in this work the polymides were prepared as rthemally stable polymers by diffrent ways
Well-Being Perception During COVID-19 Pandemic in Healthy Adolescents: Evidence From the Avatar Study
Authors: Mastorci Francesca , Bastiani Luca , Trivellini Gabriele , Doveri Cristina , Casu Anselmo , Pozzi Marta , Marinaro Irene , Vassalle Cristina , Pingitore Alessandro
Published: March 2021

Background
COVID-19 pandemic provided an extraordinary and naturalistic context to observe young people’s psychosocial profile and to study how a condition of environmental deprivation and lack of direct social contact, affect the well-being and health status of adolescents. The current study explored whether the COVID-19 outbreak changes, in the short term, the acute well-being perception in adolescents, as measured by a Personalised Well-being Index (PWBI) and the four components affecting health (i.e. lifestyle habits, social context, emotional status, mental skills), in a sample of early adolescent students.
Methods
Data were collected in 1019 adolescents (boys 48.3%, mean age 12.53 ± 1.25), at the beginning of school year (Baseline Condition, BC) as part of the AVATAR project and during the Italian lockdown phase (LP) using online questionnaire.
Results
During COVID-19 quarantine, adolescents showed a lower PWBI (p = 0.000) as compared to the baseline conditions. Considering the four health-related well-being components, lifestyle habits (p = 0.000), social context (p = 0.000), and emotional status (p = 0.000), showed significantly lower values during lockdown phase than baseline ones. However, mental skills, in LP, displayed a significant increase as compared to pre-COVID conditions (p = 0.000).
Conclusions
In this study, we have provided data on the personalised well-being index and the different components affecting health in adolescents during the COVID-19 lockdown, showing a general decreased in well-being perception, expressed in the lifestyle habits, social, and emotional components, demonstrating detrimental effects in the first phase of quarantine on adolescents’psychosocial profile. Our result shed new light on adolescence as a crucial period of risk behaviour, especially when social support is lacking.
Synthesis of a functional biomass lignin-based hydrogel with high swelling and adsorption of Acid Red 73
Authors: Wei Shuxia , Chen Wu , Tong Zhiming , Jiang Nan , Zhu Mijia
Published: March 2021

In this study, sodium lignosulfonate (LS) was used as raw material, acrylamide (AM) and acryloyloxye thyltrimethyl ammonium chloride (DAC) as monomers, and N,N'-methylenebisacrylamide (MBA) as cross-linking agent, the potassium persulfate (KPS)/tetramethylethyl enediamine (TEMED) as oxidation/ reduction initiation system. Synthesis of a functional biomass terpolymer lignin-based hydrogel adsorbent (LAD) with excellent adsorption properties by free radical graft copolymerization. The structure and properties of the prepared LAD were characterized by FT-IR and SEM, and the relationship between structure and properties was studied. The effects of solution pH, adsorption time, hydrogel dosage, initial concentration of dye and temperature on the adsorption of AR 73 by LAD were investigated. LAD adsorbed AR 73 solution with initial concentration of 100mg/L for 2h to reach equilibrium, with equilibrium adsorption capacity and adsorption rate of 47.59mg/g and 95.18%, respectively. The prepared LAD hydrogel has good swelling and deswelling properties, the swelling ratio of water absorption for 2h was 25g/g, and the water loss rate of 120 min in ethanol solvent was 93.51%. The adsorption of AR 73 by LAD was consistent with the Langmuir isothermal adsorption model. It was single-molecule adsorption with a maximum adsorption capacity of 409.84mg/g. The adsorption was a process of spontaneous heat release and entropy reduction.The adsorption kinetics was in accordance with Pseudo-second-order kinetic equation, and the adsorption activation energy was 2.501 kJ/moL. In addition, the mechanism of adsorption is mainly electrostatic, and there are also comprehensive effects of physical, chemical adsorption and hydrogen bond.The LAD hydrogel adsorbent has a significant adsorption effect on AR 73, and can be used as an efficient and recyclable biomass adsorbent for the treatment of anionic dye wastewater.
Prescribing, Supplying, and Administering Medicines. A Contemporary Review of Podiatric Surgery in the United Kingdom
Authors: Maher Anthony John , Borthwick Alan
Published: March 2021

Background. In the United Kingdom (UK) podiatrists are able to access ‘prescription only’ medicines via a specific but narrow range of legally mandated mechanisms. Data on access is also recorded by many podiatrists, especially podiatric surgeons, via a tailored data base developed within the College of Podiatry, known as PASCOM 10.Methods. The PASCOM 10 system was accessed to generate reports for the 2019 calendar year relating to podiatric surgery. The following reports were requested; Procedures, Fixations, Anaesthesia, Demographics, Medications, Post Treatment Sequalae, Patient Satisfaction (PSQ-10), Manchester Oxford Foot/Ankle Questionnaire (MOXFQ), Providers, and Referrals.Results. In 2019 there were 11,189 admissions for podiatric surgery in England recorded on the PASCOM 10 database. 103 surgery centres contributed data resulting in 18,497 procedures. Care was primarily offered in NHS settings accounting for 91% of activity, 94% of these procedures were performed under a local anaesthetic block. 18,576 medicines were supplied, administered, or prescribed from a list of 70 individual items. 29% of all medicines were prescribed by a podiatrist. Controlled drugs (CD) accounted for 28.7 percent of all recorded medicines. Conclusions. Using the PASCOM 10 database, it has been possible to identify an emerging trend in the methods of access to POM medicines by podiatrists, which appears to signal a shift in favour of independent prescribing and with that, a need for better access to controlled drugs to manage acute post-operative pain.
Risk Factors Associated With House Entry of Malaria Vectors in an Area of Burkina Faso With High, Persistent Malaria Transmission and High Insecticide Resistance
Authors: Yaro Jean Baptiste , Tiono Alfred , Sanou Antoine , Toe Hyacinthe K , Bradley John , Ouedraogo Alphonse , Ouedraogo Z Amidou , Guelbeogo Moussa , Agboraw Efundem , Worrall Eve , Sagnon N'Fale , Lindsay Steve , Wilson Anne L
Published: March 2021

Background: In rural Burkina Faso, the malaria vector An. gambiae s.l. is primarily thought to feed indoors at night. Identification of factors which influence mosquito house entry could lead to development of novel malaria vector control interventions. A study was therefore carried out to identify risk factors associated with house entry of An. gambiae s.l. in south-west Burkina Faso, an area of high insecticide resistance. Methods: Mosquitoes were sampled monthly during the malaria transmission season using CDC light traps in 252 houses from 10 villages, each house sleeping at least one child aged five to 15 years old. Putative risk factors for house entry of An. gambiae s.l. were measured, including socio-economic status, caregiver’s education and occupation, number of people sleeping in the same room as the child, use of anti-mosquito measures, house construction and fittings, proximity of mosquito aquatic habitats and presence of animals near the house. Mosquito counts were compared using a generalised linear mixed-effect model with negative binomial and log link function, adjusting for repeated collections. Results: 20,929 mosquitoes were caught, of which 16,270 (77.7%) were An. gambiae s.l. Of the 6,691 An. gambiae s.l. identified to species, 4,101 (61.3%) were An. gambiae and 2,590 (38.7%) An. coluzzii. Having an electricity supply (incidence rate ratio, IRR = 0.4, 95% CI = 0.3–0.7, p = 0.001) and a metal-roofed house (IRR, = 0.6, 95% CI = 0.4–1.0, p = 0.034) were associated with fewer malaria vectors inside the home. Conclusion: This study demonstrated that there were fewer An. gambiae s.l. in homes with electricity and a metal roof compared to those that did not. Brightly-lit, well-built houses with metal roofs may reduce entry of malaria mosquitoes compared to dimly-lit, poorly-built thatched roofed houses.