bluuebunny/crossref_metadata_2025 huggingface dataset:
The Indication of Resection-Reconstruction with Tumor Prosthesis for the Young Patient with Osteosarcoma
Authors: Cursaru A. , Lupu A.G. , Anghelescu D. , Mardare G. , Ene R. , Cîrstoiu C.
Published: May 2018

Introduction. The osteosarcoma represents the most frequently encountered primitive malignant bone tumor, representing 30% of the malignant bone tumors with an unpredictable evolution. Materials and methods. A retrospective study realized over a period of 3 years (Jan. 2016-Jan. 2018), which included 6 patients diagnosed with osteosarcoma and treated through the reconstruction with tumor prosthesis technique in the Orthopaedics and Traumatology Clinic of the University Emergency Hospital in Bucharest. Results. Of the total 6 patients, 5 were male and 1 was a female with ages between 20 and 61 years old, with an average of 30.6 years. The localization of the tumor was at the distal femur (3 cases) and at the proximal tibia (3 cases). In 3 cases, the reattachment of the extensor apparatus of the knee to the prosthesis was needed, while for 3 of the cases, a musculocutaneous flap was created for the coverage of the implant. All the 6 patients were monitored and had postoperative follow-ups at 3, 6 and 12 months by having clinical and imagistic evaluations in search of the eventual local recurrences or metastases in other tissues and organs. The postoperative evaluation of the function of the joint was realized with the Knee Society Score Questionnaire and recorded very good results (76-91) with an average of 82 points. Conclusions. The short-term results of this study about the treatment of the knee osteosarcoma with modular prostheses show that this treatment has a low tumoral recurrence rate and restores the joint function.
Surgical Treatment of Giant-Cell Tumors of the Distal Epiphysis of the Radius
Authors: Rădulescu D. , Bădilă A. , Nuțiu O. , Manolescu R. , Ciobanu T. , Japie I. , Rădulescu R.
Published: May 2018

Introduction. Giant-cell tumor of the bone is a benign tumor, but with high local aggressiveness, even with risk of remote metastasis. Material and methods. We present the case of a 57-year-old woman, without significant pathological history, who, after clinical, imagistic and anatomopathological investigations, was diagnosed with giant cell tumor of the right distal radius. The patient underwent surgery and due to the size of the tumor and destruction of the surrounding cortical bone, segmental resection of the tumor in oncological limits was performed. The bone defect was filled with the proximal one third of the ipsilateral fibula, fixed to the remaining radius diaphysis with a plate and screws. Also, the autograft was stabilized to the proximal row of the carpal bones with 2 k-wires for 6 weeks. Postoperatively, clinical and X-ray check-ups were performed at 6, 12, 24 weeks and 1 year after surgery. Results. According to Mayo functional assessment score, the results were good. At 1 year after surgery, the patient gained 85 points, representing a good functional outcome of the surgery. This way, the wrist joint mobility and the carpal cartilage were preserved, providing a barrier against distal migration of any remaining tumoral cells, as well. Conclusions. It can be stated that in aggressive giant cell tumors located at the distal radius, the best therapeutic option is a segmental resection of the lesion followed by the replacement of the bone defect with a proximal fibular autograft. This method provides the best postoperative functional results with a lower risk of local recurrence and does not require microvascular surgery or access to a bone bank.
Dealing with Bone Metastases from Breast Cancer - A Pathological and Clinical Overview
Authors: Munteanu O. , Dumitru A. , Bodean O. , Arsene L. , Voicu D. , Bratilă E. , Mehedinţu C. , Sajin M. , Cîrstoiu M.M.
Published: May 2018

From breast malignant tumors, bone is the most frequent site of metastasis. Bone metastases from breast cancer are correlated with pathological fractures, spinal cord compression and other skeletal-related events as well as bone pain and hypercalcemia. These lead to impaired mobility, decreased quality of life, and overall decrease in survival. Clarification of mechanisms regulating bone metastasis has advanced greatly in the last years and this has translated into plentiful unused therapeutic options. Greater understanding of the pathophysiology of bone metastases has led to the detection and clinical efficiency of bone-targeted agents. This review summarizes the key evidence for current clinical practice and future directions.
Interdisciplinary Approach in Bone Metastases of Ovarian Cancer
Authors: Bodean O. , Georgescu T. , Arsene L. , Voicu D. , Munteanu O. , Berceanu C. , Sajin M. , Cîrstoiu M.M.
Published: May 2018

Ovarian carcinoma is a deadly disease, with one of the highest case-to-fatality ratio amongst all gynecological malignancies. The high mortality of these tumors can be explained by the fact that most patients present at an advanced stage, with widely spread metastatic disease, especially within the peritoneal cavity. Extraperitoneal, occult metastases are usually rare in cancer surviving patients. Bone metastases are not a common finding, but their incidence seems to be higher than expected, as proven by autopsy studies. Because most clinicians are not very familiar with bone metastases of ovarian carcinoma, in this article we intended to discuss the most controversial aspects concerning the diagnosis of this type of disease.
Multiple Metastases Gestational Choriocarcinoma - A Case Report
Authors: Mehedințu C. , Cîrstoiu M.M. , Brătilă E. , Plotogea M. , Antonovici M. , Cazachevici A. , Berceanu C.
Published: May 2018

Introduction. Gestational choriocarcinoma (GC) is a malignant condition that develops from trophoblastic cells originating from a previous pregnancy, eutopic or ectopic. Metastatic choriocarcinoma is often diagnosed in the absence of a primary uterine or ovarian tumor, presumably because the latter has undergone complete necrosis. GC rapidly metastasizes spreading to lungs, brain, bones, bone marrow, liver, and other organs, but responds well to chemotherapy. Material and methods. We presented the case of a 25-year-old woman with critical evolution after being diagnosed with choriocarcinoma following a complete hydatidiform mole pregnancy. Even though the patient initially received proper treatment, due to poor follow-up compliance, the condition led to invasive metastases. When it spread to the musculoskeletal system and other organs, doctors were able to link symptoms to the choriocarcinoma diagnosis and chemotherapy was initiated. Unfortunately, the patient succumbed due to intracranial hemorrhage. Discussions. GC is a highly and fast invasive malignancy, with rapidly growing tumors. It is often associated with hemorrhage, ischemic necrosis, and secondary inflammation. Often, by the time the tumor is discovered, X-rays of the chest and bones have already shown metastatic lesions. Chemotherapy success depends on the early detection and diagnosis of tumors after pregnancy. Conclusions. Even though the initial diagnosis and treatment should have led to a favorable outcome, the patient’s poor compliance was followed by rapid progression of the disease and, finally, exitus.
Transarterial Embolization Treatment of Sacral Tumors
Authors: Anghelescu D. , Popescu E. , Cursaru A. , Dimitriu A. , Ene R. , Cîrstoiu C.
Published: May 2018

Objectives. Sacral tumors represent about 1-4,3% of all bone tumors. They typically present with an abundance of blood vessels. Due to their anatomical localization, they are hard to approach surgically. Thus, a presurgical neoadjuvant therapy is indicated. The preoperative angiography with the embolization of the nutritive arteries decreases the perioperative blood loss and the symptomatology, and even decreases the volume of the tumors that cannot be surgically approached. Materials and methods. The principle of embolization consists in the targeting of the nutritive tumoral artery and in obturating it with embolic agents (polyvinyl alcohol, embospheres, etc.) through selective catheterization under angiographic control. The biopsy of the tumor is essential for certain diagnosis. The histological type of the tumor and the degree of differentiation influence the tumor’s physiopathology and often influence the therapeutic decision regarding its degree or recurrence. In some cases in which the tumor’s degree of extension increases the surgical risk, serial embolization can be used as a primary method of treatment. Because of the late onset symptomatology, when they are discovered they are extended and the degree of invasion in adjacent tissues is so high that it requires en bloc resection with nerve root sacrifice to assert complete excision and low recurrence rates. Results. The patients who undergo surgical treatment usually bleed, and the perioperative blood loss and the need for blood transfusion volumes were halved in the cases in which presurgical transarterial embolization was performed. Conclusions. Transarterial embolization of sacral tumors is a procedure indicated as a neoadjuvant presurgical therapy to decrease the blood loss risks and for the tumors that cannot be surgically removed it is used in the palliative treatment to reduce symptomatology.
Giant Cell Tumours of the Tendon Sheath – Particular MRI Aspect
Authors: Bratu A.M. , Sălcianu I.A. , Nicula A.I. , Zaharia C. , Marinescu A.N.
Published: May 2018

Giant cell tumor of soft tissue (GCTST) is usually of synovial origin. It affects synovial membrane, serous bursae, and tendinous tunnels. The most common localizations are in the hands and forearms. Anatomopathological, GCTST is considered as being composed of a cellular fibroblastic stroma in which the tumor cells are distributed. This type of tumor is composed of a mononuclear complex and osteoclast-like giant multinucleated cells, similar to those found in the giant cell tumor at the bone level. Histologically, some authors consider that GCTST is a strictly benign tumor, consisting of welldefined multinucleated histiocytes admixed with eosinophils, lymphocytes and scattered spindleshaped cells, or hemosiderin deposits in its structure, and tumor cells do not have mitosis or atypia. Other authors consider that GCTST is a type of low-grade sarcoma; this entity was named “malignant fibrous histiocytoma, giant cell type” due to the histological similarity with malignant fibrous histiocytoma. The case of a female patient, suspected of giant cell tumor of the brachioradialis tendon sheath was presented. The MRI aspect of this tumor is not the typical one. The MRI examination consisted of a series of sequences, with T1 and T2 weighted images, fat suppression sequence, performed in all three planes, axial, sagittal, and coronal. Also, the examination was performed native, after the administration of intravenous contrast substance, when the 3D multiplanar sequences were performed. The final diagnosis was the post-operative anatomopathological examination, which confirmed that it was a giant cell tumor. We present this case for its less frequent localization - forearm, and the interest it might have in surgical treatment.
Differential Diagnosis of Benign Tumors of Bone Rich in Giant Cells, Based on Immunohistochemistry
Authors: Ali L. , Pop D.M. , Stoica C.I.
Published: May 2018

Introduction. The aim of this study was to investigate several cases of giant cell tumor of bone (TCG), chondroblastoma and aneurysmal bone cyst (ABC) by immunohistochemistry (IHC) with a panel of markers: p63, S-100, CD68, CD56, DOG1, Galectin-1, D2-40, CD34, CD45 and ki-67, some of which proved to be specific for a certain entity. Material and methods. The cases were retrospectively selected from cases processed in our facility where the surgical excision material was histopathologically analyzed in optical microscopy using the usual staining hematoxylin and eosin. The immunohistochemistry exam was performed at INCDVB by indirect method avidin-biotin-peroxidase complex (C-DAB) with polyclonal antibodies (Dako) for S100; CD56, p63, DOG1, CD34, D2-40, CD45, ki67, and Galectin1 were performed in 14 cases out of which 10 were TGC, 3 chondroblastomas, and one primary ABC. Results. Five out of ten TGC investigated showed p63 diff use nuclear expression in the mononuclear cell. None of the 3 cases of chondroblastoma or ABC-primary or secondary (associated with the above mentioned tumors), expressed p63. Other variables, non-specifically encountered in all of the tumors, were emphasized by CD34 (vascular network), ki-67 (index of proliferation), CD45 (inflammatory infi ltrate). DOG1 expression was found positive in all chondroblastoma cases. Conclusions. p63 proved to be a useful biomarker in differentiating giant cell tumor of bone from central giant cell granuloma and other giant cell-rich tumors, especially chondroblastoma and ABC. Chondroblastoma was particularly rewarding in this investigation by demonstrating the dual immunohistochemical phenotype of the neoplastic cells, both chondroblastic (S-100, D2-40) and osteoblastic (CD56 and Galectin -1). DOG1, which is mainly used for the diagnostic of GIST, was found by many to be also specific, in the proper morphopathological context, for chondroblastoma.
Borderline Giant Cell Tumors (GCT) of Proximal Tibial Epiphysis - Onco-Orthopedic Management Between Possibilities and Limits
Authors: Cismașiu R.S. , Bîrluțiu R.M. , Tudor A. , Pop D. , Stoica C.I.
Published: May 2018

Intralesional tumoral procedures in giant cell tumor (GCT) are quoted as having a recurrence rate of up to 60%. Thus, a number of studies suggest that broad resection is associated with a lower local recurrence risk compared to intralesional curettage, increasing the free recurrence interval from 84% to 100%. The TCG involvement of the proximal tibia occupies a particular place through the relationship with the articular line, but especially through the frequent, direct, or indirect interest of the extensor mechanism of the knee. Purpose of the paper. Based on the unique tumor registry of “Foişor” Orthopedic Clinic, we proposed to follow all the cases of TCG with proximal tibial localized operation, beneficiaries of an “en bloc” resection and modular tumor prosthesis reconstructions - registering a number of 5 cases between 2009 and 2017. Material and method. The initial evaluation was performed by radiography, CT-scan and MRI investigations and recurrence cases in which histopathological reassessment became mandatory after post-intralesional techniques were also included in the study. The surgical technique followed tumor resection, tumor reconstruction, and the reconstruction procedure of the extensor of the knee, which involved the modulation of the modular tumor prosthesis with a rotary reversible flap of the medial gastrocnemius with the ankle of the patellar tendon to the prosthesis and flap. Quantification of functional outcomes required the use of the revised Muscle-Skeletal Society Score (rMTS) and postoperative complications were centralized; the most commonly reported being the peroneal nerve palsy. Results and discussions. The results obtained were compared to the orthopedic oncology literature data for such a procedure, following their superposition and discrepancy. The challenge of such an orthopedic oncology intervention is the reconstruction of the extensor, with definite functional implications of limiting the knee extension, as well as avoiding the peroneal nerve palsy. However, the results can be reproducible, with an absent relapse rate.
Interdisciplinary Approach in Cervical Neoplasm with Secondary Determinations – A Case Report
Authors: Voicu D.I. , Bodean O.M. , Pauleț F. , Munteanu O. , Arsene L.V. , Cîrstoiu M.M.
Published: May 2018

Introduction. Cervical cancer is the third most common malignancy in women with gynecological pathology. Most of the times, patients are admitted to hospital in advanced stages, with multiple secondary metastases. Case report. We report the case of a 70-year-old patient initially admitted in the Orthopedic Department of University Emergency Hospital in Bucharest with suspicion of pubis fracture. After clinical, imagistic and paraclinical evaluation, cervical cancer was suspected and the patient was transferred to the Obstetrics and Gynecology Department of University Emergency Hospital in Bucharest in order to identify etiology of the multiple secondary metastases. CT examination revealed liver determinations as well as pelvic lymphadenopathy, accompanied by suggestive neoplastic transformation of the cervix and invasion of the uterine body, parameters, and bladder; inferior branch of the pubis, and bilateral pubis, with a suggestive side-by-side aspect, were also distinguished from osteolysis. Histopathological examination following a cervical biopsy revealed non-keratinized squamous carcinoma with secondary imagistic findings, placing this case in FIGO IVB stage. Conclusions. Due to the insidious evolution, cervical cancer can reach advanced stages. The prognosis of patients with advanced stage cervical cancer and bone secondary determinations is reserved.
Denosumab Treatment in a Rare, Neglected Giant Cell Tumor (GCT) of the Femoral Neck: Case Report and Literature Review
Authors: Marinescu R. , Lăptoiu D. , Botezatu I. , Ciumeica S. , Bunea A. , Ştefan G.
Published: May 2018

Introduction. GCT resembles an aggressive benign tumor of bone and its evolution based on the histological features is unpredictable. About 50% of the cases are located around the knee (proximal femur and distal tibia), with the proximal humerus and distal radius representing the third and fourth most common sites. Femoral neck location is unusual. We report a case of GCT located at the femoral neck level, in a 19-year-old female. Case presentation. Onset was hidden by pathologic femoral neck fracture and, due to insidious symptoms, proper diagnosis and treatment were neglected for almost six months. After 6 months, the case was referred to our clinic and re-evaluated with complete examination and biopsy. Wide resection and tumoral arthroplasty of the hip was performed. Postoperative complete recovery was achieved and the patient returned to previous activities. After 2 years of normal clinical evolution, a neurological severe issue appeared; at this time, a cerebral metastasis was diagnosed. Once the positive diagnosis was achieved, 120 mg Denosumab treatment was initiated monthly. At 16 months follow-up, the patient was symptom free and continued Denosumab treatment. Discussion. Denosumab is a human monoclonal IGG2 antibody inhibiting osteoclast differentiation, activation, and survival with applicable suppression of bone turnover in patients with multiple myeloma, osteolytic bone disease, and bone metastases from breast and prostate cancer. It is also a useful drug for managing the GCT of bone and one excellent option in metastatic GCT. The long time safety and complications, especially in young female patients, are to be proven. Conclusions. Early diagnosis and accurate management of GCT are mandatory in order to achieve good long-term clinical results. Denosumab treatment may be necessary in order to avoid secondary metastasis or local recurrence.
Systemic Treatment for Soft Tissue Sarcoma: What is Standard, What is New
Authors: Jinga D.C. , Chetroiu D.
Published: May 2018

Soft tissue sarcoma (STS) is a biologically heterogeneous malignancy with over 50 subtypes. This solid tumor is one of the most challenging diseases to treat for the medical oncologist. STS often forms in the body’s muscles, joints, fat, nerves, deep skin tissues, and blood vessels. The natural history of high-grade STS is characterized by a strong tendency toward local recurrence and metastatic spreading, despite optimal initial strategies. The lung is the most common site of metastases, with poor prognosis. We present the current international guidelines for the adjuvant treatment and systemic treatment for advanced STS and the new discoveries. Many new molecular targeting drugs have been tried in the last ten years, and some were approved for soft tissue sarcoma. The first approved was Imatinib, as a treatment for gastrointestinal stromal tumors (GISTs). Following Imatinib, other tyrosine kinase inhibitors (TKIs) received the approval for GISTs such as Sunitinib and Regorafenib, and Pazopanib for non-GIST soft tissue sarcomas. In 2016, FDA approved the first monoclonal antibody that targets platelet-derived growth factor receptor (PDGFR)-α, Olaratumab. The new treatment demonstrates an overall survival advantage. In this review, we aimed to summarize the results from the most recent studies on adjuvant treatment for high-grade STS and systemic strategies for advanced STS.
Pelvic Chondrosarcoma - The Role of the Biopsy and the Correlation Between the Histopathological Bioptic Diagnosis and the Excisional One
Authors: Popescu R. , Cuculici Șt. , Cristea Șt.
Published: May 2018

Chondrosarcoma is one of the most frequent malignant bone tumors. We included in the initial study population 110 patients with pelvis biopsies and the histopathological result of chondrosarcoma. We excluded the cases with incomplete data. Thirty-five in block resections were included in the final study population. In the rest of the cases, the surgery was not made because of many considerations (multiple metastases, patient’s refusal, and surgical contraindications). In three cases, discrepancies were noted between the grade of malignancy found after biopsy and the one confirmed through the surgical excision. This corresponds to a precision rate of 91,42 % (32/ 35) in the confirmation of chondrosarcoma. The accuracy of the histopathological diagnosis between low grade chondrosarcoma and high grade chondrosarcoma was of 94,27 % (33/ 35). We concluded that the image-guided biopsy is useful in determining the grade of malignancy of the chondrosarcoma and in the planning of the subsequent treatment. A multidisciplinary team (orthopaedic surgeon, radiologist, and pathologist) is needed to improve the diagnosis of the pelvic chondrosarcoma.
Static Balancing of Robot Mechanisms and Manipulation Devices
Authors: Segla Stefan
Published: May 2018

The paper deals with static balancing of various kinds of mechanisms and manipulation devices using spring balancing mechanisms. In case of parallelogram robots and manipulation mechanisms a spring balancing mechanism exerting a constant force is used. Problems of static balancing of variable payloads are also presented and investigated in the paper. Static balancing is formulated as an optimization problem with the objective function expressing minimization of the forces acting in the driving joints. As design variables geometrical variables and spring stiffnesses and their unloaded lengths are used. Optimization Toolbox for Use with Matlab and GOOD (Generator Of Optimal Designs) are used to solve the static balancing problems. The optimized mechanisms are evaluated by using multibody dynamics programs taking into account friction effects in mechanism joints. The results of static balancing optimization show essential reduction of the gravity load in drive joints and consequently driving forces with important energy savings.
“East meets West” – on studying “Eastern” housing estates through “Western” concepts and approaches
Authors: Andráško Ivan
Published: May 2018

This paper is directly associated with the international conference “East meets West – contemporary urban issues revisited”.

The main objective of the paper is to provide readers with ideas related to the possibility of studying the “Eastern” (post-socialist) housing estates through selected “Western” concepts including representation, symbolism, everydayness/everyday life and the complexity of relations including the materiality or socio-technical configuration of places.

The paper consists of three main sections: in the introductory section, basic information and knowledge regarding (large) housing estates are concisely presented and discussed. By means of illustrative examples, the second main section of the paper covers a brief presentation of selected “Western” concepts. The final section focuses on the discussion of the concepts’ usefulness and of the methods through which they can be utilised. The main ideas and conclusions resulting from this paper can be stated as follows:

–

particular housing estates in CEE countries find themselves in a common, yet at the same time always in one way or another specific and individual “post-socialist situation”;

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to understand the situation of a particular housing estate means to understand the structural influences as well as the agency of particular (local) actors, either human or non-human;

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housing estates can be seen as dynamic, ever-changing socio-technical-spatial formations constantly passing through a continuous process of (re) production by various forces/actors and (power) relations.
Living memorial and frozen monuments: the role of social practice in memorial sites
Authors: Erőss Ágnes
Published: May 2018

Monuments and memorials have become mundane elements of public space: commemorative plaques, statues, and memorial sites are mushrooming in the wake of memory production. However, besides the emblematic ones that have become accepted both by the powers and the public, there is a long list of monuments which are less cherished and/or have failed to be accepted as landmarks. When analysing two memorials in Budapest, I was interested in the possible factors explaining the failure and/or neglect of a monument. The monument dedicated to the victims of the German Occupation of Hungary was never officially unveiled, thus has not become part of the governing authority’s political landscape. Hence the proliferation of commemorative plaques on site the Corvin Passage, one of the emblematic scenes of 1956 revolution in Hungary, seems to be in a limbo between a commercial area and a heritage site. In contrast, the anti-monument on Liberty Square, a collage of personal relics, juxtaposing the official memorial, regularly visited by locals as well as tourists.

Based on the example of the anti-monument on Liberty square, I stress the importance of social practice in commemoration. I argue that a memorial site’s public acceptance and success is correlated with its capacity to engage in regular social practices.
Bitola – from Eyalet capital to regional centre in the Republic of Macedonia
Authors: Dimitrov Nikola V. , Markoski Blagoja , Radevski Ivan , Zlatanoski Vladimir
Published: May 2018

In the past nine hundred years Bitola has undergone a string of administrative and political rises and falls. In the course of the 16th century the city grew to have a very large population and become a huge economic and geopolitical centre of the large province of Rumelia in the Ottoman Empire. However, as a result of some overwhelming political and military events that played out during the 20th century (the dissolution of the Ottoman Empire, the Balkan wars, WW1, WW2 and other economic, political, technical and technological developments that occurred in the world and in the country) Bitola was reduced to a mere local city in economic, geopolitical and population terms. The immediate economic and population expansion of Bitola is presented through an exact numeric and cartographic overview of spatial-temporal changes in the city’s development in the past two centuries. For the purposes of rendering a more accurate image, we have compared Bitola’s population, administrative and geopolitical role with a number of major Balkan cities.
RANCANG BANGUN SISTEM MONITORING ARUS BEBAN PADA GARDU DISTRIBUSI MENGGUNAKAN SHORT MESSAGE SERVICE
Authors: Indra Parmana Ignatius I Wayan Rexci , Partha Cok Gede Indra , Utama Ngakan Putu Satriya
Published: May 2018

Gardu distribusi merupakan komponen utama dari sistem distribusi tenaga listrik. PLN sebagai penyedia kebutuhan listrik di Indonesia masih menggunakan cara konvensional dalam memonitor arus beban pada gardu distribusi dengan datang ke lokasi dan mengambil data. Rancang bangun sistem monitoring arus beban pada gardu distribusi menggunakan SMS merupakan perangkat yang diintegerasikan pada gardu distribusi. Nilai arus beban yang dibaca dan dikonversi oleh sensor, informasi waktu dan tanggal secara real time ditampilkan pada LCD. Pengimplementasian sistem monitoring arus beban dilakukan pada gardu distribusi KA-0298 yang menyuplai Laboratorium Teknik Elektro Universitas Udayana. Perangkat ini dapat melakukan monitoring arus beban berdasarkan perintah yang dikirimkan melalui SMS. Perintah SMS yang dikirim dengan kode “CEKARUS” dapat diterima dan direspon oleh sistem monitoring arus beban dengan hasil balasan SMS informasi nilai arus beban fasa R, fasa S, fasa T dan fasa N pada gardu distribusi. Sistem data logger pada perangkat dapat digunakan untuk merekam perubahan arus beban pada gardu distribusi. Sistem notifikasi arus beban memberikan SMS peringatan jika terjadi gangguan arus beban pada gardu distribusi.

[Turnitin Chek 7% 24032017]
Rancang Bangun Sistem Smart Charging menggunakan Panel Surya pada Robot 6WD berbasis Mikrokontroler Arduino
Authors: Hendrayanto Made Yogi , Swamardika Ida bagus Alit , Mertasana Putu Arya
Published: May 2018

Ilmu pengetahuan dan teknologi dalam bidang robotika pada saat ini berkembang dengan sangat cepat. Teknologi robotika pada dasarnya dikembangkan dengan tujuan untuk membantu manusia dalam melakukan pekerjaan tertentu, seperti pekerjaan yang berisiko tinggi, pekerjaan yang tidak bisa dikerjakan oleh tangan manusia secara langsung dan pekerjaan yang membutuhkan ketelitian tinggi. Pada saat ini, robot masih dikendalikan secara manual oleh manusia menggunakan Baterai sebagai sumber energi robot dan melakukan pengisian secara manual. Berdasarkan hal tersebut maka ada suatu keinginan untuk berkontribusi dalam pengembangan teknologi robot 6WD yaitu dengan merancang sebuah sistem Smart charging menggunakan Panel surya sebagai sumber energi untuk melakukan pengisian baterai robot secara langsung. Sistem yang dibuat, nantinya dapat membuat robot 6WD, bergerak dengan cara manual menggunakan inputan dari komputer yang dikontrol manual dari manusia. Manusia hanya perlu menggerakkan dan dapat melihat kondisi dari 2 buah baterai robot 6WD dari Komputer, kemudian komunikasi yang terjadi antara komputer dengan robot dapat dilakukan secara dua arah, agar robot dapat memberikan informasi balik kepada komputer, baik itu daya baterai, loss area dan lain sebagainya.Arduino Mega 2560 digunakan sebagai sistem utama yang mengolah semua data input dan output pada sistem. Modul HM-TRP befungsi untuk mengirimkan data dari robot ke komputer untuk ditampilkan.Pengiriman informasi robot 6WD meliputi informasi kondisi status 2 buah baterai, arus baterai, tegangan baterai, dan arah dari gerakan robot yang akan dikendalikan melalui GCS(Ground Control Station).

 

[TURNITIN CHECK 8%, 18042017]
Authors: Murpratiwi Santi Ika , Widyantara I Made Oka
Published: May 2018

Citra bitmap biasanya memiliki ukuran citra yang relative besar. Hal ini mempengaruhi proses transmisi data dan membutuhkan tempat penyimpanan yang besar. Untuk memecahkan masalah tersebut dibutuhkan sebuah teknik reduksi citra untuk memampatkan ukuran citra dengan tetap menjaga kualitasnya. Dalam penelitian ini akan membandingkan beberapa algoritma kompresi lossy untuk menemukan satu metode optimal yang cocok untuk citra digital bitmap. Algoritma kompresi yang akan dibandingkan adalah Absolute Moment Block Truncation Coding (AMBTC), Joint Photograpic Experts (JPEG), dan Non-Negative Matrix Factorization (NMF). Proses perbandingan dilakukan dengan menghitung rasio kompresi, Mean Square Error (MSE), and Peak Signal to Noise Ratio (PSNR) untuk mengetahui ukuran hasil kompresi dan kualitas citra hasil kompresi. Hasilnya adalah rasio kompresi rata-rata untuk AMBTC adalah 7.32%, JPEG 1698.3%, dan NMF 8.32%. Nilai rata-rata MSE untuk kompresi AMBTC adalah 36.92, kompresi JPEG adalah 54.50 dan untuk NMF adalah 194.54. Sedangkan untuk nilai PSNR yaitu 30.15 db untuk AMBTC, 31.79 db untuk JPEG, dan 25.99 db untuk NMF. Dari hasil tersebut algoritma optimal yang dapat digunakan untuk kompresi citra bitmap adalah AMBTC karena AMBTC memiliki rasio kompresi dan kualitas citra hasil kompresi terbaik.
Pemampatan Citra Pas Foto dengan Menggunakan Algoritma Kompresi Joint-Photograpic Experts Group (JPEG) dan Principal Component Analysis (PCA)
Authors: Maricar M. Azman , Widyantara Oka
Published: May 2018

Penelitian ini bertujuan untuk membandingkan hasil kompresi dari algoritma Joint-Photograpic Experts Group (JPEG) dan Principal Component Analysis (PCA) terhadap citra pas foto, guna menemukan hasil terbaik dari hasil citra kompresi yang kualitas hasilnya tidak berbeda jauh dengan citra aslinya. Alat ukur yang digunakan adalah Mean Square Error (MSE) dan Peak Signal to Noise Ratio (PSNR). Hasil yang diperoleh dalam penelitian ini adalah rata-rata MSE dan PNSR algoritma PCA dapat dikatakan tinggi jika dibandingkan dengan algoritma JPEG. Namun dari segi kualitas citra yang dihasilkan tidak jauh berbeda dengan algoritma JPEG.Dapat dikatakan bahwa algoritma JPEG mampu menghasilkan citra yang lebih baik dibandingkan algoritma PCA. Namun, algoritma PCA tidaklah buruk untuk dijadikan alternatif dalam kompresi citra pas foto.
CADANGAN PREMI ASURANSI JOINT-LIFE DENGAN SUKU BUNGA TETAP DAN BERUBAH SECARA STOKASTIK
Authors: SUKANASIH NI KOMANG , WIDANA I NYOMAN , JAYANEGARA KETUT
Published: May 2018

Joint life is an insurance that covered two or more individuals in one policy. This research aims to determine the value and comparison of  fixed deposit rate premium and stochastic rate with Vasicek model. It used prospective calculation method. The mortality table in the research used TMI-2011, for participant were couple age 40 and 35 years old with 10 year premium payment. Under this condition the value of constant rate premium and Vasicek rate premium is  and . Besed of this research showed the value of the Vasicek rate premium is smaller than constant rate premium.
SIMULASI PERGERAKAN RUNTUHAN LONGSOR MENGGUNAKAN MODEL SAVAGE-HUTTER DENGAN FINITE VOLUME METHOD
Authors: LUDICA ALIFANDA PINKAN , GUNAWAN P. H. , ROHMAWATI ANIQ A.
Published: May 2018

The avalanche is simulated using the Savage-Hutter model with Finite Volume Method (FVM) as a numerical solution in one dimension. The scheme used in FVM is collocated-grid. The aim of this research is to observe the avalanche based on different sediment types on the incline bed with the same initial sediment height. These simulations produce the value of velocity and height avalanche. For each type of sediment has a difference in velocity and height of avalanche affected by the internal angle of friction and the bed friction angle. Sediments with the highest bed friction angle have highest speed. The average velocity of each sediment are Quartz with u = 10.627, Yellow Sand with u = 7.437, and Rice with u = 2.1178 at time t = 1.
KONVERGENSI NUMERIK FLUKS RUSANOV DAN HLLE PADA METODE BEDA VOLUM UNTUK MENGHAMPIRI PERSAMAAN AIR DANGKAL
Authors: MEIDIANTO N. R. EKO , GUNAWAN P. H. , ROHMAWATI A. ATIQI
Published: May 2018

This one-dimensional simulation is performed to find the convergence of different fluxes on the water wave using shallow water equation. There are two cases where the topography is flat and not flat. The water level and grid of each simulation are made differently for each case, so that the water waves that occur can be analyzed. Many methods can be used to approximate the shallow water equation, one of the most used is the finite volume method. The finite volume method offers several numerical solutions for approximate shallow water equation, including Rusanov and HLLE. The derivation result of the numerical solution is used to approximate the shallow water equation. Differences in numerical and topographic solutions produce different waves. On flat topography, the rusanov flux has an average error of 0.06403 and HLLE flux with an average error of 0.06163. While the topography is not flat, the rusanov flux has a 1.63250 error and the HLLE flux has an error of 1.56960.
MEMODELKAN DAMPAK DAN KEBERLANJUTAN PARIWISATA PESISIR DI KABUPATEN BADUNG – PROVINSI BALI
Authors: DWIPAYANA NGURAH P. , KENCANA EKA N. , TASTRAWATI NI KETUT TARI
Published: May 2018

Tourism has been positioned as rising industry since year 2000s. Despite of its position as the primary mover for economic development and increasing the welfare of local people at the destination, tourism also induces some negative impacts regarding the social as well environment dimension for the destination and its surrounding. This essay is directed to study the impacts of marine tourism that take places at coastal region of Badung regency of Bali province. Utilising proportionally random sampling, 180 local people at District of Mengwi at Badung were selected as the sample's members for the study. Three dimensions of tourism sustainability i.e. economic, socio-cultural, and environment dimension were positioned as the exogenous latents while tourism impact was perceived by the local is placed as the endogenous one. In additon, this impact is hypothesed a ects the sustainability of marine tourism at this district. A covariance-based structural equation model was built to elaborate the causal relationship among these latent variables. Our research confirmed all of exogenous latents significantly affect people perception about tourism impact with socio-cultural dimension dominates the others' impact, and in turn, this impact - from supply perspective - affects marine tourism sustainability at Mengwi district of Badung regency.
ANALISIS MISKONSEPSI “GERAK DAN GAYA” MENGGUNAKAN INSTRUMEN FORCE CONCEPT INVENTORY (FCI) PADA MAHASISWA CALON GURU FISIKA
Authors: Munfaridah Nuril , Sutopo Sutopo , Sulur Sulur , Asim Asim
Published: May 2018

Tujuan penelitian ini adalah memetakan penguasaan konsep dan mengetahui miskonsepsi mahasiswa calon guru fisika terkait materi gerak dan gaya menggunakan instrumen Force Concept Inventory (FCI). Pengambilan data dilakukan dengan memberikan tes kepada mahasiswa calon guru fisika tahun pertama di Jurusan Fisika UM sebanyak 95 mahasiswa. Hasil analisis jawaban dari instrumen yang diberikan menunjukkan kecenderungan bahwa sebagian besar mahasiswa masih mempercayai pemikiran logis yang berdasar pada kuantitas fisik dan belum menggunakan konsep fisika untuk menjawab. Beberapa konsep fisika terkait dengan gerak dan gaya yang cukup dikuasai oleh mahasiswa antara lain gerak melingkar, gerak parabola, hukum II Newton, dan hukum III Newton, sedangkan konsep yang masih perlu diberikan penguatan lebih diantaranya gerak vertikal baik ke atas maupun ke bawah  dan kebeadaan gaya kontak dan interaksi gaya benda satu dengan benda yang lain. Setelah diperoleh pemetaan penguasaan konsep dan miskonsepsi mahasiswa calon guru fisika, perlu dikembangkan strategi pembelajaran yang dapat menyelesaikan permasalahan miskonsepsi mahasiswa berdasarkan karakteristik masing-masing materi fisika.
NanoElectrocatalysis: From Basic Research to Applications in Energy Conversion
Authors: Arenz Matthias
Published: May 2018

In this article an overview of our research in the field of nanoelectrocatalysis, in particular electrocatalytic energy conversion, is presented. Our research comprises the areas of catalyst preparation as well as performance evaluation of model and applied electrocatalysts with respect
to activity, selectivity, and stability. Our aim is to understand the fundamental properties that determine the performance of electrocatalysts for particular processes and to build a bridge between fundamental research and realistic applications. In our research we prepare catalyst materials,
study the interface between the catalyst and the electrochemical environment, i.e. the solid–liquid interface, and perform kinetic measurements. Furthermore, such research relies to a large extent on material characterization techniques as well as the development and application of advanced experimental setups.
Surface and Defect Chemistry of Oxide Materials
Authors: Aschauer Ulrich
Published: May 2018

Oxides and oxide-derived materials find ubiquitous applications in many industrial applications. These materials usually contain point defects, the concentration and type depending on the synthesis and operating conditions. Many of the functional properties are determined or strongly
affected by the presence of these point defects. Despite steady advances in experimental techniques it is still difficult to unambiguously identify point defects and resulting atomic-scale mechanisms from experiment alone. Atomic-scale computational approaches such as density functional theory
(DFT) provide an alternative approach that ideally complements experimental investigations. The resulting fundamental understanding of defect-induced mechanisms combined with the knowledge of how to tailor a point-defect profile to induce new functionality opens exciting new avenues to engineer
novel material properties. This account discusses some case studies of defect-induced functionality in the area of oxide electronics and photocatalysis, giving a general flavour of our current understanding of the role of defects in these applications.
Towards a Synthetic Mitochondrion
Authors: Biner Olivier , Schick Thomas , Ganguin Aymar Abel , Von Ballmoos Christoph
Published: May 2018

Our group at the University of Bern uses biochemical and biophysical techniques to unravel details of the molecular mechanism of membrane proteins. Of special interest are the large multi-subunit complexes of the universally conserved respiratory chain and the ATP synthase that are
found in mitochondria and aerobic bacteria. In a bottom-up approach using purified membrane proteins and synthetic lipids, we aim to mimic the basic processes of oxidative phosphorylation. We further develop methodologies to increase the complexity of such artificial systems, paving the way for a synthetic mitochondrion. In this minireview, we summarize recent efforts of our groups and others towards a synthetic respiratory chain.
Understanding Chemical Reactions beyond Transition-State Theory
Authors: Richardson Jeremy O.
Published: May 2018

Transition-state theory is one of the most successful theories in chemistry. Not only does it provide a simple formula for computing the rate of a reaction but it defines our understanding of how a chemical reaction occurs – by overcoming an energy barrier. However, the theory
is based on classical assumptions and ignores several quantum effects which can be important for certain reactions, particularly those involving hydrogen transfer at low temperatures. We are developing a more general quantum version of transition-state theory which reveals how quantum tunnelling and nonadiabatic effects can strongly affect the rate.
Towards the Ultimate Membranes: Two-dimensional Nanoporous Materials and Films
Authors: Agrawal Kumar Varoon
Published: May 2018

The energy-efficient separation of molecules has been a popular topic in chemistry and chemical engineering as a consequence of the large energy-footprint of separation processes in the chemical industry. The Laboratory of Advanced Separations (LAS) at EPFL, led by Prof. Kumar Varoon
Agrawal, is focused to develop next-generation, high-performance membranes that can improve the energy efficiency of hydrogen purification, carbon capture, hydrocarbon and water purification. For this, LAS is seeking to develop the ultimate nanoporous membranes, those with a thickness of 1
nm and possessing an array of size-selective nanopores. In this article, the research activities at LAS, especially in the bottom-up and top-down synthesis of chemically and thermally stable, nanoporous two-dimensional materials and membranes are discussed.
Menumbuh kembangkan Berpikir Logis dan Sikap Positif terhadap Matematika melalui Pendekatan Matematika Realistik
Authors: Subekti Evina Eka
Published: May 2018

The process of learning mathematics that implemented in the classroom become very interesting issue for discussion. This is because meaningful learning is expected to enhance students' logical thinking abilities and positive attitudes towards mathematics still very rare. There was only the memorization process of mathematical concepts that are mechanistical. As a result, some research indicates that student learning?óÔé¼Ôäós result is not satisfactory. This paper describes the mathematical approach theoretically realistic to develop logical thinking ability and positive attitude of students towards mathematics that can ultimately improve student learning?óÔé¼Ôäós result.?é?áKey words: logical thinking, positive attitude, realistic mathematic
Upaya Meningkatkan Aktivitas dan Kreativitas Siswa pada materi Matematika di Sekolah Dasar dengan Pembelajaran Pemecahan Masalah
Authors: Sulianto Joko , Mandarsary Ryky
Published: May 2018

AbstrakUpaya Meningkatkan Aktivitas dan Kreativitas Siswa pada materi Matematika di Sekolah Dasar dengan Pembelajaran Pemecahan Masalah. Sistem pembelajaran matematika dewasa ini sangat menekankan pada pendayagunaan keaktifan siswa dalam proses belajar dan pembelajaran untuk mencapai tujuan yang telah ditentukan. Pada tulisan ilmiah ini bertujuan untuk mendiskripsikan Pembelajaran pemecahan masalah pada mata pelajaran matematika di sekolah dasar dapat meningkatkan aktivitas dan kreativitas belajar siswa.k Kreativitasannya, Kreativitas dapat menciptakan situasi yang baru, tidak monoton dan menarik sehingga siswa akan lebih terlibat dalam kegiatan pembelajaran yang dilakukan. Pembelajaran pemecahan masalah dapat meningkatkan aktivitas dan kreativitas belajar siswa. Karena Konsep dasar dan karakteristik Pembelajaran pemecahan masalah merupakan rangkaian aktivitas pembelajaran yang menekankan pada proses penyelesaian masalah yang dihadapi secara ilmiah.Kata Kunci: Pemecahan Masalah, matematika, aktivitas, kreativitas
Consensus of Democracy in Making The National Development (Case Study of Dynamics Conflict of Selection of The Message Village Head in Blitar District)
Authors: Samaudin Anwar
Published: May 2018

This research is based on the simultaneous election of village heads in 2013. This phenomenon arises because of the local government policy to hold simultaneous village head elections in Blitar regency. This study aims to determine the description of conflict of simultaneous village head election in Blitar Regency followed by 150 villages. This research was conducted in eight villages of Blitar Regency. This research uses qualitative method, and described descriptively with data source in this research consist of 8 candidate of village head, some support from eight candidate of village head who has conflict. Data collection techniques used are observation, interview and documentation. Sampling technique used in this research is purposive sampling. The validity of the data in this study using triangulation techniques sources and data analysis using interactive Miles and Huberman. The result of the research shows that the conflict of simultaneous village head election in Blitar Regency that varied from the couple of husband and wife, the candidate pair from the messenger or the right hand of one candidate, the existence of some cheating in the election process, the candidate of the headache is sick to death, self. The conflicts are caused by several factors such as the absence of the candidates who register until the time limit is set, the public expectation of the leadership of one of the candidates, and the simultaneous village head election conflict in Blitar Regency are ridden by other interests, there are those who do not like one of the candidates village head. Forms of conflict that occurred in Blitar district that is the latent conflict that already exists between the two candidates for village head, manifest conflict is a riot in the form of filing a lawsuit, there is also a vertical conflict between one candidate with the supporters of the opposing party and also horizontal conflict that is between supporters.