1,455 research outputs found
High resolution 3-T MR imaging in the evaluation of the trigeminal nerve course
No full textBACKGROUND: The evaluation of the trigeminal course and his anatomical relationships with surrounding structures, is important for the assessment of the injury that may occur in tumors and several orofacial trauma and for avoiding the damage during surgeries. AIM: The aim of this retrospective study was to assess the use of 3-T MRI in the evaluation of the course of the four segments of the trigeminal nerve: cisternal and Meckels's cave, cavernous sinus, skull base and mandibular extracranial segments. PATIENTS AND METHODS: 78 patients were studied, for a total of 156 trigeminal nerves examined. T2-weighted 3D Fast imaging employing steady-state acquisition and T1-weighted Fast spoiled gradient recalled echo sequences were used. Two radiologists (reader A and B), independently, evaluated the course of the four segments of the trigeminal nerve according to a qualitative scale. The Intraclass correlation coefficient (ICC) and Pearson correlation coefficient were used to assess the intraobserver and interobserver variability in the nerve course evaluation. RESULTS: Reader A evaluated 47 trigeminal nerves excellent, 94 good, 12 fair and 3 poor. Reader B rated 43 trigeminal nerves excellent, 92 good, 16 fair and 5 poor. The intraobserver variability was ICC = 0.937 in reader A and ICC = 0.894 in reader B. The interobserver variability was 0.734 (p = 0.01). CONCLUSIONS: High resolution 3-T MRI imaging allows an accurate study of the trigeminal nerve and especially of its mandibular branch. The knowledge of the course and of the anatomic relationships of these nerve bundles with surrounding structures, as well as of the anatomical variants, allow oral and maxillofacial surgical plannings thus reducing the risk of nerve damage
Analisa Ketahanan Pompa (Pump Endurance) Dengan Penggerak Arus Listrik DC
No full textSaat pompa air DC sudah banyak di produksi namun masih jarang digunakan masyarakat umum. Penggunaan dengan arus DC sangat potensial karna dapat menggunakan listrik langsung dari panel surya, akan tetapi masyarakat umum belum mengetahui kehandalan pompa tersebut. untuk mengetahui kehandalan pompa tersebut penulis melakukan pengujian dengan judul “Analisa ketahanan pompa (pump endurance) dengan penggerak arus listrik DC” Berdasarkan pengujian yang dilakukan untuk meneliti ketahanan pompa menggunakan pompa DC dengan spesifikasi sebagai berikut : daya masimum 180 Watt, head masimum 15 m, kapasitas masimum 1.5 m3/jam dengan 12 V. Dari hasil pengujian selama 7 x 24 jam dengan head 4.9 m di peroleh hasil yaitu pada voltage 12,04 V dan 4,09 A di dapat kapasitas pompa yaitu 23 liter/menit, daya pompa 50,7 Watt. Pada voltage 7,7 V dan 6,02 A di dapat kapasitas pompa yaitu 10 liter/menit, daya pompa 46,4 Watt . Pada voltage 12,06 V dan 4,1 A di dapat kapasitas pompa yaitu 20 liter/menit daya pompa 49.4 Watt. Sehingga dapat diambil kesimpulan bahwa dari hari pertama sampai hari ke tujuh performa pompa dapat dinilai hanya mengalami sedikit perubahan dari 23liter/menit menjadi 20 liter/menit .
Kata kunci: pompa, arus DC, ketahanan./ When there are many DC water pumps in production, they are still rarely used by the general public. The use of DC is very potential because it can use electricity directly from solar panels, but the general public does not yet know the reliability of the pump. To determine the reliability of the pump, the author conducted a test with the title "Analysis of pump endurance (pump endurance) with a DC electric current drive". maximum 1.5 m3/hour with 12 V. From the test results for 7 x 24 hours with a head of 4.9 m, the results obtained are at a voltage of 12.04 V and 4.09 A the pump capacity is 23 liters/minute, pump power is 50, 7 Watts. At a voltage of 7.7 V and 6.02 A, the pump capacity is 10 liters/minute, the pump power is 46.4 Watts. At a voltage of 12.06 V and 4.1 A, the pump capacity is 20 liters/minute, the pump power is 49.4 Watt. So it can be concluded that from the first day to the seventh day the pump performance can be judged to have only experienced a slight change from 23 liters/minute to 20 liters/minute.
Key: pump, Direct Current (DC), resistanc
Flexibility and resistance to cyclic fatigue of endodontic instruments made with different nickel-titanium alloys:a comparative test
No full textLearning by archives. The role of fashion exhibitions and fashion archives to defining (and stimulating) possible new educational paths.
No full textIn the contemporary panorama of fashion design - a domain that is becoming a hybrid between tradition and innovation increasingly, between digital and physical, between product and communication - archives and the staging of fashion are becoming more and more essential tools not only for the design of individual products but also for the definition of innovative communication and educational processes. In fact, in contemporary times, the fashion archives, both in their physical and digital forms, represent an essential element for fashion design education. The archives are officially considered a "cultural asset", not only because it preserves but also because it is able, through its activity, to generate innovation, becoming an active protagonist of the contemporary fashion design scene. The artefacts that fashion archives preserve can convey not only individual stories related to a single product, brand or designer but also collective stories related to the culture of a specific time or place, to artistic movements and political ones, to music, cinema and photography. The archive is not a physical place that crystallizes products, but a creative and dynamic space, also digital, capable of generating new trends and an inexhaustible source for contemporary fashion. The archive becomes the generator of new narrations through a mechanism capable of connecting different worlds, styles, eras and products. From this point of view, clothing (as well as fashion accessories) are not seen as a finished product but as artefacts capable of narrating past stories and, at the same time, producing new ones. In this context, museums, exhibitions and archives are increasingly taking on a renewed and active role in contributing to the definition of new design paradigms, capable of overcoming the traditional categories of revival or costume favouring a more contemporary "mash-up" approach. Mash-ups in which past and present, craftsmanship and new technologies, revival and experimentation blend seamlessly. The paper aims to present the didactic experience in the Master in Design and Technology for Fashion Communication, born from the collaboration between the University of Bologna and several fashion archives in Italy (such as Archivi di Ricerca Mazzini and Fashion Research Italy). A project of didactic experimentation built through a multidisciplinary approach, in which the students are involved in a project activity in which they play a central role in the design of all the phases of an exhibition: from historical research to archival research, from curatorship to spatial planning, up to the definition of the multimedia translation of the exhibition contents. A training project, organized in phases of increasing complexity, in which the curatorship and the staging of fashion artefacts become educational tools based on learning by doing and learning by experience approach
Treatment of high-flow arteriovenous malformations (AVMs) of the head and neck with embolization and surgical resection
No full textAIM: Arteriovenous malformations (AVMs) with a high flow of the head and neck are quite rare compared to their low-flow counterparts, but when they do occur they are often accompanied by massive bleeding or present with significant esthetic defects. The treatment of these high-flow vascular anomalies is often highly risky. The multidisciplinary approach required for the assessment and treatment of these lesions should include angioradiology with preoperative superselective embolization, followed by surgical resection of the lesion within 24 hours and esthetic reconstruction. MATERIALS OF STUDY: We studied a series of 55 patients with AVMs of the head and neck that were treated surgically between 1999 and 2009. RESULTS: Of the 55 patients with AVMs, 7 had hemangiomas and 48 had vascular malformations, of which 28 were low-flow lesions and 20 were high-flow lesions (AVMs). The high-flow lesions were most commonly located on the lip. All 48 AVMs underwent surgical resection for concerning symptoms, diagnostic purposes, or esthetic problems. Of the 20 high-flow AVMs, 20% were classified as Schobinger stage I, 55% as stage II, and 25% as stage III. A combined treatment of embolization and resection was used to resolve 13 of the high-flow AVMs (stages II and III), of which 4 required a flap reconstruction. CONCLUSION: Recent advances in microsurgery and interventional angioradiology have greatly improved the prognosis for patients with these malformations. Combined embolization-resection is the treatment of choice for high-flow AVMs, and esthetic reconstruction with flaps can prevent their recurrence
The use of high resolution magnetic resonance on 3.0-T system in the diagnosis and surgical planning of intraosseous lesions of the jaws: preliminary results of a retrospective study
No full textBACKGROUND: The pre-operative evaluation in oral and maxillofacial surgery is currently performed by computerized tomography (CT). However in some case the information of the traditional imaging methods are not enough in the diagnosis and surgical planning. The efficacy of these imaging methods in the evaluation of soft tissues is lower than magnetic resonance imaging (MRI). AIM: The aim of the study was to show the use of MRI in the evaluation of relation between intraosseous lesions of the jaws and anatomical structures, when it was difficult using the traditional radiographic methods, and to evaluate the usefulness of MRI to depict the morphostructural characterization of the lesions and infiltration of the soft tissues. MATERIALS AND METHODS: 10 patients with a lesion of jaw were selected. All the patients underwent panoramic radiography (OPT), CT and MRI. The images were examined by dental and maxillofacial radiology who compared the different imaging methods to analyze the morphological and structural characteristics of the lesion and assessed the relationship between the lesion and the anatomical structures. RESULTS: Magnetic resonance imaging, provided more detailed spatial and structural information than other imaging methods. CONCLUSIONS: MRI allowed us to characterize the intraosseous lesions of the jaws and to plan the surgery, resulting in a lower risk of anatomic structures surgical injury
Rancangan Sistem Irigasi Reuse Dengan Otomatisasi Pompa
No full textSistem irigasi reuse pompa otomatis merupakan suatu sistem rangkaian untuk memindahkan air dari tempat pembuangan air ke resevoir sehingga air yang sudah di pindahkan dan disimpan ke resevoir dapat digunakan pada musim kemarau untuk mengaliri lahan kepertanian.
Peneliti merancang bangun sistem irigasi reuse otomatisasi pompa menggunakan tenaga matahari, bertujuan untuk bangun sistem irigasi reuse otomatis berbasis panel surya. dan melakukan analisis untuk mengetahui kebutuhan debit daya, head dan debit pada tersebut.
Pada penelitian melakukan 3 kali percobaan dengan head yang berbeda menggunakan pompa 60 watt maka head 120 cm , rata – rata pengisian baterai dalam 10 jam sebesar 12.96 V, dengan sisa daya dengan rata-rata 12.36 V, pengoperasian pompa 1 hari dalam waktu selama 7 jam, aliran air dalam pipa terjadi hambatan dengan total head losses 0.00518, maka membutuhkan pompa 1 unit, aliran air irigasi sawah pada air limpasan belum terangkat 250 l/min, maka membutuhkan jumlah komponen untuk sistem irigasi reuse sehingga efesiensi pompa sebesar 25% dengan adanya luasan lahan 1 ha membutuhkan total debit yang diperlukan yaitu 1.1 l/dt maka jumlah pompa yang digunakan 6 unit kapasitas panel surya 50 Wp dan jumlah panel 7 unit. Rancang sistem irigasi reuse dengan pompa otomatis sehingga komponen rancangan elektrik yang diperlukan berupa baterai 12 V 35 Ah, carhenge controller 20 A, dan komponen rancangan non elektrik yaitu pipa ½ inc dengan head 120 cm untuk panjang pipa ke resevoir 43000 cm, kedalam bak pembuangan 75 cm
Treatment of facial vascular malformations with embolisation and surgical resection
No full textIntroduction: Facial arteriovenous malformations (AVMs) are quite rare morbid conditions that clinically present themselves mainly as a massive bleeding or a significant aesthetic defect. Vascular malformations do not regress spontaneously; this is the reason why their resection is necessary. The successful treatment of these vascular anomalies is often compromised, since a high incidence of recurrence could be expected if the lesion is not managed properly. A multidisciplinary approach is needed for the assessment and treatment of these lesions. The therapeutic management involves a preoperative superselective embolisation, a surgical resection of the lesion within the following 24 hours and finally an aesthetic reconstruction. Patients and Methods: The study was carried out on a total of 62 patients with facial AVMs; all the patients underwent surgical procedures from 2000 to 2010. Results: The case series consisted of 8 patients with haemangiomas and 54 patients with AVMs; in 31 cases of the latter group the vascular malformations showed a low blood flow, whereas the remaining 23 cases had a high blood flow. The lips were the most common localization. All 54 patients with AVMs underwent a surgical resection. Among the 23 patients with facial high-blood flow AVM, 21.7% were classified as stage I Schobinger, 47.9% as stage II, and 30.4% as stage Ill. The treatment consisting of associated embolisation and resection was performed in 14 arteriovenous malformations (stage II, Ill) with high blood flow; 5 of them required a flap reconstruction. Conclusion: Recent advances in micro-surgery and interventional angioradiology have improved the prognosis of treatment for these malformations. Combining embolisation and resection with aesthetic flap reconstruction represents the therapy of choice for facial arteriovenous malformations, as it prevents their recurrence
Analisis Ketahanan Pompa dengan Penggerak Arus Listrik Direct Current
No full textgan arus DC sangat potensial karena dapat menggunakan listrik langsung dari panel surya, akan tetapi
masyarakat umum belum mengetahui keandalan pompa tersebut. Untuk mengetahui keandalan pompa tersebut,
dilakukan kajian ini. Berdasarkan pengujian yang dilakukan untuk mengetahui ketahanan pompa menggunakan
pompa DC dengan spesifikasi sebagai berikut: daya masimum 180 W, head maksimum 15 m, kapasitas maksimum
1,5 m3
/jam dengan 12 V. Dari hasil pengujian selama 5 x 24 jam dengan head 4,9 m diperoleh hasil yaitu pada
voltage 12,04 V dan 4,09 A didapat kapasitas pompa yaitu 23 liter/menit, daya pompa 50,7 W. Pada tegangan 7,7
V dan 6,02 A didapatkan kapasitas pompa yaitu 10 liter/menit, daya pompa 46,4 W. Pada tegangan 12,06 V dan
4,1 A didapatkan kapasitas pompa yaitu 20 liter/menit daya pompa 49,4 W. Sehingga dapat diambil kesimpulan
bahwa dari hari pertama sampai hari ke tujuh, performa pompa dapat dinilai hanya mengalami sedikit perubahan
dari 23 liter/menit menjadi 20 liter/menit.
Kata kunci: pompa, arus DC, ketahanan. / When DC water pumps have been widely produced, they are still rarely used by the general public. The use of
DC current is very potential because it can use electricity directly from solar panels, but the general public does
not yet know the reliability of the pump. To determine the reliability of the pump, so this research were conducted.
The maximum capacity is 1.5 m3
/hour with 12 V. From the test results for 5 x 24 hours with a head of 4.9 m, the
results obtained are at a voltage of 12.04 V and 4.09 A, the pump capacity is 23 liters/minute, pump power is 50.7
W. At a voltage of 7.7 V and 6.02 A, the pump capacity is 10 liters/minute, the pump power is 46.4 W. At a voltage
of 12.06 V and 4.1 A, the pump capacity is 20 liters/minute, the pump power is 49.4 W. So it can be concluded that
from the first day to the seventh day the pump performance can be judged to have only experienced a slight change
from 23 liters/minute to 20 liters/minute.
Keywords: pump, direct current (DC), endurance
Antagonistic Fashion. The Last Generations after Japanese Post-atomic Wave
No full textThe essay "Antagonistic Fashion. The Last Generations after the Japanese Post-atomic Wave" deals with the latest radical trends and
current inclinations labelled as anti-pop, anti-form, anti-glam, in a word, anti-fashion. The prefix “anti” is to be intended as a banner
of contrast and opposition in respect to mainstream fashion canons. Drawing from a methodological frame rooted in the phenomenology of styles, from which she borrows a historical-critical structure usually applied to the arts, the author marks the trends of some designers’ latest generations (such as Carol Christian Poell, Maurizio Altieri, Issei Fujita, Boris Bidjan Saberi, Damir
Doma) who are on the same wavelength as that of the research started by Yohji Yamamoto, Rei Kawakubo and Issey Miyake
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