The Comaneci Device for Entering an Acute-Angled Small Feeder during Cerebral Arteriovenous Malformation Embolization: A Novel Technique to Support Microcatheterization

In this report, we describe the use of the Comaneci device to support microcatheterization in a small branch arising from a parent artery during embolization. In 2 cases, arteriovenous malformations presented with intracranial hemorrhage. A microcatheter was navigated into a small feeder while the Comaneci device was deployed just distal to the feeder with an acute angle from the parent artery. Our technical note represents an alternative option of catheterization in cases with difficult access to small feeders originating from higher flow arteries at a sharp angle while maintaining continuous flow in the parent artery.

Model Sistem Angkutan Umum Wilayah Metropolitan Mamminasata Dalam Rangka Efisiensi Pergerakan Masyarakat Perkotaan

Pertumbuhan ekonomi perkotaan berdampak pada peningkatan aktivitas penduduk yang menimbulkan mobilitas yang semakin tinggi. Di sisi lain, ketersediaan sarana dan prasarana transportasi di Indonesia masih belum memadai dilihat dari kuantitas dan kualitasnya. Pada akhirnya persoalan lalu lintas akan timbul seiring dengan kebutuhan pergerakan masyarakat perkotaan, tidak terkecuali di wilayah Mamminasata (Makassar, Maros, Sungguminasa dan Takalar). Melihat kondisi tersebut, diperlukan solusi guna mengantisipasi dampak yang lebih besar. Penelitian ini mencoba mencari solusi terkait kondisi angkutan umum perkotaan yang kinerjanya dinilai semakin hari semakin memprihatinkan.Tujuan penelitian ini adalah 1) menilai kinerja pelayanan angkutan umum yang ada (pete-pete) di wilayah Mamminasata, dan 2) menentukan model sistem angkutan umum yang efisien untuk mendukung pergerakan masyarakat di wilayah Mamminasata. Penelitian ini tergolong penelitian deskriptif, komparatif dan bersifat studi kasus yang secara garis besar merupakan rangkaian proses identifikasi dan analisis. Teknik analisis yang digunakan adalah 1) analisis pertumbuhan penduduk dan perkembangan wilayah Mamminasata, 2) analisis Costumer Satisfaction Indeks (CSI) dan Importance Performance Analysis (IPA), 3) Analytic Hierarchy Process (AHP). Hasil penelitian menunjukkan bahwa dari 14 indikator sistranas, indikator yang dinilai rendah dan menjadi prioritas untuk ditingkatkan antara lain aksesibilitas, keterpaduan, tepat waktu, nyaman, kapasitas, efisien. Sedangkan jika dilihat dari kinerja tiap aspeknya, bobot kinerja yang tertinggi adalah aspek sosial sebesar 3,869, aspek lingkungan sebesar 3,724 dan yang paling rendah adalah aspek ekonomi sebesar 3,431. Model sistem angkutan umum kereta api komuter dinilai sebagai alternatif yang paling efisien dibandingkan monorel, BRT dan pete-pete, walaupun demikian, sinergitas/keterpaduan keempat moda tersebut merupakan model yang paling baik. Sistem keterpaduan diwujudkan dengan mengembangkan kereta api komuter sebagai main line ditunjang oleh monorel dan BRT sebagai midle feeder sedangkan pete-pete sebagai small feeder.

KAJIAN PENAMBAHAN BILGE KEEL TERHADAP GERAK OLENG KAPAL KONTAINER TIPE SMALL FEEDER

Tol laut merupakan salah satu dari kebijakan Pemerintah Indonesia yang berorientasi pada kemandirian dan kedaulatan di sektor maritim sehingga dibutuhkan armada kapal yang memadai. Satu armada kapal yang dibutuhkan adalah Kapal Kontainer. Kapal Kontainer dalam studi ini merupakan tipe pengumpan dengan katagori kapasitas kelas small feeder dengan panjang (Lpp) = 74 m, Lebar (B)= 17 m, dan Sarat (T) = 3 m. Jalur pelayaran yang direncanakan akan melewati wilayah perairan dengan gelombang tinggi pada 6 Skala Beaufort, sehingga apabila gelombang datang dari arah samping (beamsea) maka dikhawatirkan kapal akan mengalami oleng cukup besar yang dapat berdampak pada keselamatan kapal. Perencanaan penambahan penggunaan bilge keel (lunas bilga) pada Kapal Kontainer diharapkan bisa menjadi roll damping system yang cukup efektif untuk mengurangi sudut oleng (roll) kapal. Dengan menggunakan simulasi numerik menggunakan metode panel yang divalidasi dengan hasil pengujian, maka diperoleh hasil pengurangan gerak oleng (roll) pada Kapal Kontainer sebesar 20% untuk kondisi 6 Skala Beaufort.

Identifikasi Rasio Dimensi Utama Kapal Kontainer Kelas Small Feeder Untuk Toll Laut Indonesia

Saat ini Pemerintah Indonesia sedang merealisasikan program tol laut yang telah dicanangkan sejak 2015 melalui pengadaan berbagai jenis kapal. Salah satu diantaranya adalah kapal kontainer dengan kapasitas small feeder (≤1000 TEUs) 100 TEUs, 208 TEUs, dan 1000 TEUs. Walaupun demikian, Pemerintah belum mempunyai standar desain khususnya kapal kontainer kelas small feeder. Untuk mewujudkan standar desain, penggunaan rasio dimensi utama kapal sudah lazim digunakan untuk mengidentifikasi dimensi utama kapal pada tahap preliminary design. Nilai rasio berbeda untuk tipe kapal yang sama tergantung kapasitas kapal. Metode analisa statistik digunakan untuk identifikasi nilai rasio dimensi utama kapal kontainer kelas small feeder guna membantu desainer maupun galangan kapal dalam penentuan dimensi utama kapal. Nilai rasio dimensi utama kapal hasil analisa adalah L/B=5.29-6.17, L/D=10.93-13.21, B/T=2.39-3.26,D/T=1.19-1.43, Froude number V/√g.L= 0.2170.253, Cd (rasio deadweight/Displacement)=0.78-0.98, TEUs/Dwt=0.05-0.07, L/D1/3=5.0-5.4, dan BHP/Displ.V. =0.044-0.060 juga telah diidentifikasi.

Pelvic congenital arteriovenous malformation diagnosed by transrectal ultrasonography: A case report

Arteriovenous malformations (AVMs) of the pelvis are relatively rare and difficult to treat because of multiple and extensive feeding vessels. We report the case of a 69-year-old male with pelvic congenital AVM that was detected during tests for dysuria. He visited our hospital complaining of voiding difficulty. Digital rectal examination revealed a pulsating mass that was palpable on the right side of the prostate. Transrectal ultrasonography showed multiple hypoechoic lesions adjacent to the prostate and colour Doppler ultrasonography revealed the flow regions corresponded to the hypoechoic lesions. Computed tomography demonstrated large-to-small tubular vessels adjacent to the prostate, while pelvic angiography showed many small feeder arteries extending mainly from the right internal iliac artery. He was diagnosed as having pelvic congenital AVM. Uroflowmetry revealed slight voiding difficulty without residual urine. The patient decided against treatment and requested we monitor his clinical course.

CHARACTERIZATION OF PEACH ROOTS UNDER SEMIARID CONDITIONS INFLUENCED BY IRRIGATION TIMING

Field studies were conducted June 2, July 27, and October 15, 1988 to determine root concentrations within the dry and wetted soil of trickle-irrigated peach trees (Redglobe variety) in Windthorst fine sandy loam soil. Two “dryland” and four irrigation treatments (based on time of year irrigation initiated and previous irrigation history) were used. A single soil core sample 2.2 cm in diameter and 80 cm deep was taken 50 cm from trickle emitters on each of 8 trees per irrigation treatment and a single sample taken the same distance from the trunk on the “dry” side of the 8 trees in each dryland treatment. Each core was sectioned into 20-cm increments, washed, roots collected, separated (small, feeder roots; large suberized roots), dried and weighed. Analyses of data for the small, feeder roots showed a significant difference (0.01 level) in root density between treatments, between sample times (each treatment), and with depth (each treatment). Root concentrations were highest in soils that had received irrigation in previous years and also when irrigation was initiated early in the year. Root concentrations were also found to be highest in the top 20 cm of soil regardless of treatment.

CHARACTERIZATION OF PEACH ROOTS UNDER SEMIARID CONDITIONS INFLUENCED BY IRRIGATION TIMING

Field studies were conducted June 2, July 27, and October 15, 1988 to determine root concentrations within the dry and wetted soil of trickle-irrigated peach trees (Redglobe variety) in Windthorst fine sandy loam soil. Two “dryland” and four irrigation treatments (based on time of year irrigation initiated and previous irrigation history) were used. A single soil core sample 2.2 cm in diameter and 80 cm deep was taken 50 cm from trickle emitters on each of 8 trees per irrigation treatment and a single sample taken the same distance from the trunk on the “dry” side of the 8 trees in each dryland treatment. Each core was sectioned into 20-cm increments, washed, roots collected, separated (small, feeder roots; large suberized roots), dried and weighed.Analyses of data for the small, feeder roots showed a significant difference (0.01 level) in root density between treatments, between sample times (each treatment), and with depth (each treatment). Root concentrations were highest in soils that had received irrigation in previous years and also when irrigation was initiated early in the year. Root concentrations were also found to be highest in the top 20 cm of soil regardless of treatment.

III.—Formation of Vallies. A Description of Heudeshope

The Heudeshope beck is a small feeder of the Tees, running swiftly down a steep valley into the main stream, at Middleton Teesdale. It is wholly in the lead-measures (Carboniferous limestone), which are here nearly horizontal, undisturbed by trap, and shew only a few faults, so small as not to affect the surface. The great Teesdale fault operates on the other side of the main valley. The Heude beck flows north and south. Its source is in the table-land, forming the water-shed, between Weardale and Teesdale, whence four or five streams issue in different courses. It is unobscured by the drift beds, which characterize the opposite lower slopes of the Tees valley. It is excavated down to the solid rock, the banks have been quite undisturbed by cultivation. It passes through forty-three distinct alternations of grit, shale, and limestone, to each-of which the miners have given a distinct name; it falls about 1,000 feet in the six miles of its course, In the hope that a tramp down by side of its brawling rivulet, during the short hours of a winter day, might illustrate some theory of valley-formation, I devoted one of the last days of the year to the task.