PEMBUATAN DESAIN TURBIN ANGIN SUMBU VERTIKAL (VAWT) DAN PANEL SURYA UNTUK PEMANFAATAN ENERGI LISTRIK

Pembuatan turbin angin vertikal dengan panel surya merupakan pemanfaatan energi angin dan energi panas menjadi salah satu energi yang dimanfaatkan, agar dapat diubah menjadi energi listrik, sehingga dapat membantu aktivitas manusia dan menjadi energi terbarukan yang ramah dengan lingkungan. Maka dibuatlah desain turbin angin vertikal menggunakan software solidworks 2022, perancangan terdiri dari beberapa bagian, yaitu panel surya, blade/rotor turbin angin, blade support, shaft, pole arm, bearing housing, bearing, tiang dan box panel listrik, dengan electric installation yang terdiri dari controller, battery, dan lampu, semua bagian dirancang dalam bentuk gambar 3D dan 2D. Turbin angin dengan ukuran tiang 5.02 m, kemudian ditambah 1.27274 m, blade turbin, panjang tiang lampu 1 m, kotak generator dan baterai 50 cm x 40 cm x 20 cm. Angin akan mendorong  blade dari turbin angin yang bentuk helical dengan NACA 0021 dengan luas area blade 0.11 m, sehingga turbin helical  akan memanfaatkan gaya angkat (lift) dan memutar bilah blade turbin dan menggerakkan generator agar mengkonversi energi listrik dari putaran turbin dan disimpan dalam baterai untuk menghidupkan lampu sebagai penerangan. Pada turbin angin vertikal energi listrik menghasilkan 51,8 watt/s serta energi listrik dari panel surya menghasilkan 13,25 VDC, maka daya total hasil dari turbin angin vertikal dan panel surya 71,6 Watt/h. Desain turbin angin vertikal yang ditambahkan dengan panel surya dapat disebut hybrid

ANALISIS DAN DESAIN WING UAV VTOL MENGGUNAKAN FINITE ELEMENT ANALYSIS

Unmanned Aircraft (PTTA) or Unmanned Aerial Vehicle (UAV) is an aircraft that flies without a pilot and is controlled automatically. UAVs have a wide range of applications, including remote sensing, communication links, and natural disaster monitoring. One type of UAV being developed is LSU 05, using a composite of carbon fiber (CFRP) and glass fiber (GFRP) for its wing structure. This study aims to create a 3D model of the UAV VTOL wing, analyze the effect of material variations on the strength of the wing structure, and find the optimal wing design using the finite element analysis method. This study uses the SolidWorks 2021 software with maneuver conditions loading. The results of the analysis show that carbon fiber provides higher strength than fiberglass. In a fiberglass wing, the maximum stress is 229 MPa, while in a carbon fiber wing it is 197 MPa. The biggest displacement occurred in the fiberglass wing, which was 2.661 mm. The safety factor of the carbon fiber wing is 2.7, while that of the fiberglass is 1.9. This research provides an in-depth understanding of the behavior of VTOL UAV wing structures and contributes to the development of better wing designs. The optimized design can increase the performance, efficiency and reliability of VTOL UAV.Pesawat Terbang Tanpa Awak (PTTA) atau Unmanned Aerial Vehicle (UAV) adalah pesawat udara yang terbang tanpa pilot dan dikendalikan secara otomatis. UAV memiliki berbagai aplikasi, termasuk penginderaan jarak jauh, penghubung komunikasi, dan pemantauan bencana alam. Salah satu tipe UAV yang dikembangkan adalah LSU 05, menggunakan komposit serat karbon (CFRP) dan serat kaca (GFRP) untuk struktur wing-nya. Penelitian ini bertujuan membuat model 3D wing UAV VTOL, menganalisis pengaruh variasi material pada kekuatan struktur wing, dan mencari desain sayap optimal menggunakan metode analisis elemen hingga. Penelitian ini menggunakan software SolidWorks 2021 dengan pembebanan kondisi manuver. Hasil analisis menunjukkan carbon fiiber memberikan kekuatan lebih tinggi daripada fiberglass. Pada wing fiberglass, tegangan maksimum adalah 229 MPa, sedangkan pada wing carbon fiiber adalah 197 MPa. Displacement terbesar terjadi pada wing fiberglass, yaitu 2,661 mm. Faktor keamanan wing carbon fiiber adalah 2,7, sedangkan fiberglass adalah 1,9. Penelitian ini memberikan pemahaman mendalam tentang perilaku struktur wing UAV VTOL dan kontribusi dalam pengembangan desain sayap yang lebih baik. Desain yang dioptimalkan dapat meningkatkan kinerja, efisiensi, dan keandalan UAV VTOL

ANALISA DESAIN KEKUATAN STUKTUR PART KONEKTOR DAN TUBE FRAME UAV VTOL MENGGUNAKAN FINITE ELEMENT ANALYSIS

UAV The purpose of this study was to determine the effect of the use of carbon fiber and aluminum materials on the structural strength of the tube and connector parts by considering the safety factor obtained from the analysis results. This study uses the finite element method with the help of solidworks software. The research was conducted in stable flight conditions, namely the UAV's gravity was the same as the UAV's lift. From the results of the frame design, the weight mass is 25.6 kg. From the simulation results, the tube with carbon fiber material and aluminum 6061 alloy both have good strength because the maximum stress values ​​that occur are 15.71 MPa and 15.64 MPa, and these values ​​are still below the yield stress of carbon fiber material which is 551 MPa and aluminum 6061 alloy material, namely 55.1 MPa, with a safety factor obtained of 35 for carbon fiber and 3.5 for aluminum 6061 alloy, and a maximum displacement of 0.056 mm for carbon fiber and 0.812 mm for aluminum 6061 alloy. Whereas the connectors with carbon fiber and aluminum 6061 alloy materials also have good strength because the maximum stress values ​​that occur are 4,266 MPa and 4,139 MPa, and these values ​​are still below the yield stress of carbon fiber material and aluminum 6061 alloy material. with a safety factor obtained of 130 on carbon fiber and 3.5 on aluminum 6061 alloy, and the maximum displacement is 3,734 x 10-5 mm on carbon fiber and 5,416 x 10-4 mm on aluminum 6061 alloy. The use of carbon fiber material in tubes and connectors has better strength than aluminum 6061 alloy, due to the safety factor the value obtained is greater.Tujuan dari penelitian ini adalah mengetahui pengaruh penggunaan material carbon fiber dan aluminium terhadap kekuatan struktur dari part tube dan konektor dengan mempertimbangkan faktor keamanan yang diperoleh dari hasil analisis. Penelitian ini menggunakan metode elemen hingga dengan bantuan software solidworks. Penelitian yang dilakukan pada kondisi terbang stabil yaitu gaya berat UAV sama dengan gaya angkat UAV. Dari hasil desain frame diperoleh massa berat yaitu 25,6 kg. Dari hasil simulasi, tube dengan material carbon fiber dan aluminium 6061 alloy sama-sama memiliki kekuatan yang baik karena nilai tegangan maksimum yang terjadi sebesar 15,71 MPa dan 15,64 MPa, dan nilai-nilai tersebut masih dibawah tegangan luluh material carbon fiber yaitu 551 MPa dan material aluminium 6061 alloy yaitu 55,1 MPa, dengan safety factor yang diperoleh 35 pada carbon fiber dan 3,5 pada aluminium 6061 alloy, dan displacement maksimum yaitu 0,056 mm untuk carbon fiber dan 0,812 mm untuk aluminium 6061 alloy. Sedangkan pada konektor dengan material carbon fiber dan aluminium 6061 alloy juga sama-sama memiliki kekuatan yang baik karena nilai tegangan maksimum yang terjadi sebesar 4,266 MPa dan 4,139 MPa, dan nilai-nilai tersebut masih dibawah tegangan luluh material carbon fiber dan material aluminium 6061 alloy,  dengan safety factor yang diperoleh 130 pada carbon fiber dan 3,5 pada aluminium 6061 alloy, dan displacement maksimum yaitu 3.734 x 10-5 mm pada carbon fiber dan 5,416 x 10-4  mm pada aluminium 6061 alloy. Pengunaan material carbon fiber pada tube dan konektor memiliki kekuatan yang lebih baik dari aluminium 6061 alloy, dikarenakan nilai safety factor yang diperoleh lebih besar

SIMULASI BILAH TURBIN ANGIN SUMBU VERTIKAL (VAWT) TIPE ROTOR HELICAL UNTUK PEMBANGKIT LISTRIK TENAGA ANGIN DI TEPI PANTAI BUKIT DAN JALAN

The energy crisis is caused by rapid technological developments throughout the world resulting in increased use of fossil energy and global warming, so it is necessary to develop renewable energy technologies to maintain energy stability in the world. One of the renewable energy potentials is wind energy with a Helical rotor type vertical axis wind turbine using NACA 0021 as the blades, the research method used is the numerical method with the result that the wind speed on the parangtritis beach is 4.74 m/s and the air density is 1.2 Kg/m^3 with the power generated using 4 rotor blades of 59.2 Watt/h. then on the paragliding hill, an air speed of 4.55 m/s and an air density of 1.16 Kg/m^3 is obtained, and on the western Yogyakarta ringroad which has an airspeed of 3.885 m/s and an air density of 1.17 Kg/m^3, it produces an electric power of 31.9 Watt/h. The power results generated between the simulation and manual calculations are not much different, so the power accuracy between the two is quite good.Krisis Energi diakibatkan perkembangan Teknologi yang pesat di seluruh dunia mengakibatkan penggunaan energi fosil yang meningkat dan global warming, sehingga perlu adanya pengembangan Teknologi energi terbarukan untuk menjaga kesetabilan energi didunia. Salah satu potensi energi terbarukan adalah energi angin dengan turbin angin sumbu vertikal tipe rotor Helical menggunakan NACA 0021 sebagai bilah-nya, metode penelitian yang digunakan adalah metode nomerik dengan hasil dimana kecepatan angin pada tepi pantai parangtritis sebesar 4,74 m/s dan density udara 1,2 Kg/  dengan daya yang dihasilkan menggunakan 4 bilah rotor sebesar 59,2 Watt/h. kemudian di bukit paralayang didapatkan kecepatan udara 4,55 m/s dan density udara 1,16 Kg/  , dan pada jalan ringroad barat yogyakarta yang memiliki kecepatan udara sebesar 3,885 m/s serta density udara 1,17 Kg/ ,menghasilkan daya listrik sebesar 31,9 Watt/h. Hasil daya yang dihasilkan antara simulasi dengan pergitungan manual tidak jauh beda, sehingga akurasi daya antara keduanya cukup baik

Produksi Film Pendek Mateni di Festival Film Gadget

Tujuan dari penelitian ini adalah untuk mengetahui bagaimana proses manajemen produksi suatu film. Penelitian ini menggunakan teknik pengumpulan data melalui wawancara dari observasi arsip tim produksi. Banyak yang harus dipersiapkan ketika pembuatan film. Adapun metode yang digunakan adalah deskriptif kualitatif dengan melalui wawancara yang melibatkan produser film. Penelitian ini menemukan proses bagaimana pembuatan suatu film. Hasil penelitian menunjukkan bagaimana proses pembuatan film ini, mulai dari praproduksi, produksi, dan post produksi. Penelitian ini menemukan data bahwa, film “Mateni” memperoleh penghargaan sebagai pemenang Festival Film Gadget yang diselenggarakan oleh Broadcasting Universitas Muhammadiyah Yogyakarta

Bridging minds and machines : the recent advances of brain-computer interfaces in neurological and neurosurgical applications

Brain-Computer Interfaces (BCIs), a remarkable technological advancement in neurology and neurosurgery, mark a significant leap since the inception of electroencephalography (EEG) in 1924. These interfaces effectively convert central nervous system signals into commands for external devices, offering revolutionary benefits to patients with severe communication and motor impairments due to a myriad of neurological conditions like stroke, spinal cord injuries, and neurodegenerative disorders. BCIs enable these individuals to communicate and interact with their environment, using their brain signals to operate interfaces for communication and environmental control. This technology is especially crucial for those completely locked in, providing a communication lifeline where other methods fall short. The advantages of BCIs are profound, offering autonomy and an improved quality of life for patients with severe disabilities. They allow for direct interaction with various devices and prostheses, bypassing damaged or non-functional neural pathways. However, challenges persist, including the complexity of accurately interpreting brain signals, the need for individual calibration, and ensuring reliable, long-term use. Additionally, ethical considerations arise regarding autonomy, consent, and the potential for dependence on technology. Despite these challenges, BCIs represent a transformative development in neurotechnology, promising enhanced patient outcomes and a deeper understanding of brain-machine interfaces.Peer reviewe

Improving Serial Imaging Protocols in Spontaneous Intracerebral Hemorrhage

There is no universally agreed upon protocol to image patient presenting with intra-parenchymal hemorrhage of non-traumatic etiology (sICH). At our institution, it is common practice for a patient to have 3 CT’s done within 24 hours. They are often at onset of symptoms or presentation, 6 hours post onset of symptoms, and finally 24 hours post bleed onset. The goal of this project will be to assess the safety and efficacy of obtaining this repeat imaging in our patients in the hopes that limiting unnecessary CT head studies will decrease resource utilization, decrease patient radiation, expedite movement of stable patients out of the ICU and/or disposition

Quantifying the contribution of material and junction resistances in nano-networks

Networks of nanowires and nanosheets are important for many applications in printed electronics. However, the network conductivity and mobility are usually limited by the inter-particle junction resistance, a property that is challenging to minimise because it is difficult to measure. Here, we develop a simple model for conduction in networks of 1D or 2D nanomaterials, which allows us to extract junction and nanoparticle resistances from particle-size-dependent D.C. resistivity data of conducting and semiconducting materials. We find junction resistances in porous networks to scale with nanoparticle resistivity and vary from 5 Ohm for silver nanosheets to 25 GOhm for WS2 nanosheets. Moreover, our model allows junction and nanoparticle resistances to be extracted from A.C. impedance spectra of semiconducting networks. Impedance data links the high mobility (~7 cm2/Vs) of aligned networks of electrochemically exfoliated MoS2 nanosheets to low junction resistances of ~670 kOhm. Temperature-dependent impedance measurements allow us to quantitatively differentiate intra-nanosheet phonon-limited band-like transport from inter-nanosheet hopping for the first time.Comment: 5 figure

Atypical parkinsonism-associated retromer mutant alters endosomal sorting of specific cargo proteins

The retromer complex acts as a scaffold for endosomal protein complexes that sort integral membrane proteins to various cellular destinations. The retromer complex is a heterotrimer of VPS29, VPS35, and VPS26. Two of these paralogues, VPS26A and VPS26B, are expressed in humans. Retromer dysfunction is associated with neurodegenerative disease, and recently, three VPS26A mutations (p.K93E, p.M112V, and p.K297X) were discovered to be associated with atypical parkinsonism. Here, we apply quantitative proteomics to provide a detailed description of the retromer interactome. By establishing a comparative proteomic methodology, we identify how this interactome is perturbed in atypical parkinsonism-associated VPS26A mutants. In particular, we describe a selective defect in the association of VPS26A (p.K297X) with the SNX27 cargo adaptor. By showing how a retromer mutant leads to altered endosomal sorting of specific PDZ ligand–containing cargo proteins, we reveal a new mechanism for perturbed endosomal cargo sorting in atypical parkinsonism

LSST Science Book, Version 2.0

A survey that can cover the sky in optical bands over wide fields to faint magnitudes with a fast cadence will enable many of the exciting science opportunities of the next decade. The Large Synoptic Survey Telescope (LSST) will have an effective aperture of 6.7 meters and an imaging camera with field of view of 9.6 deg^2, and will be devoted to a ten-year imaging survey over 20,000 deg^2 south of +15 deg. Each pointing will be imaged 2000 times with fifteen second exposures in six broad bands from 0.35 to 1.1 microns, to a total point-source depth of r~27.5. The LSST Science Book describes the basic parameters of the LSST hardware, software, and observing plans. The book discusses educational and outreach opportunities, then goes on to describe a broad range of science that LSST will revolutionize: mapping the inner and outer Solar System, stellar populations in the Milky Way and nearby galaxies, the structure of the Milky Way disk and halo and other objects in the Local Volume, transient and variable objects both at low and high redshift, and the properties of normal and active galaxies at low and high redshift. It then turns to far-field cosmological topics, exploring properties of supernovae to z~1, strong and weak lensing, the large-scale distribution of galaxies and baryon oscillations, and how these different probes may be combined to constrain cosmological models and the physics of dark energy.Comment: 596 pages. Also available at full resolution at http://www.lsst.org/lsst/sciboo