Effect of processing conditions on the thermal and electrical conductivity of poly (butylene terephthalate) nanocomposites prepared via ring-opening polymerization

Successful preparation of polymer nanocomposites, exploiting graphene-related materials, via melt mixing technology requires precise design, optimization and control of processing. In the present work, the effect of different processing parameters during the preparation of poly (butylene terephthalate) nanocomposites, through ring-opening polymerization of cyclic butylene terephthalate in presence of graphite nanoplatelets (GNP), was thoroughly addressed. Processing temperature (240{\deg}C or 260{\deg}C), extrusion time (5 or 10 minutes) and shear rate (50 or 100 rpm) were varied by means of a full factorial design of experiment approach, leading to the preparation of polybutylene terephthalate/GNP nanocomposite in 8 different processing conditions. Morphology and quality of GNP were investigated by means of electron microscopy, X-ray photoelectron spectroscopy, thermogravimetry and Raman spectroscopy. Molecular weight of the polymer matrix in nanocomposites and nanoflake dispersion were experimentally determined as a function of the different processing conditions. The effect of transformation parameters on electrical and thermal properties was studied by means of electrical and thermal conductivity measurement. Heat and charge transport performance evidenced a clear correlation with the dispersion and fragmentation of the GNP nanoflakes; in particular, gentle processing conditions (low shear rate, short mixing time) turned out to be the most favourable condition to obtain high conductivity values

Penerapan Metode Activity-based Costing Dalam Penetapan Tarif Jasa Rawat Inap Pada Rumah Sakit Cut Meutia Langsa

The study aims to determine the application of activity-based costing method in determining the rates of hospitalization services in public hospitals Cut Meutia Langsa. The method used are descriptive and comparative analysis. Data used in the research are primary and secondary data, which are gotten from intern company in 2015. Primary data gotten from interview and direct observation, meanwhile secondary data gotten from hospital's cost report.The use of the Activity-Based Costing method in the determination of tarrifs for inpatient services presented more accurate and precise. So that the result from this research show that rate of the hospitalization was distored (undercostind and overcosting). Undercosting occur in Super VIP room rates, while the rates for rooms VIP Exclusive, I, II, and III were experienced undercosting. Keywords— Activity-Based Costing, cost, cost driver, and tariff for inpatient servic

The importance of early parenting for later child outcomes: A study with Spanish families with children with disabilities

Children with different disability conditions have varied developmental trajectories, which perhaps influences parent-child interaction. For these and all infants, an optimal home environment that includes good parenting and positive parent-child interactions predicts better developmental outcomes (Spiker et al., 2005). Interventions using a family-centered, parenting-focused approach result in better parenting behavior that contributes to improved early child development (Avellar & Suplee, 2013; Roggman & Cardia, 2016). Information on parent-child interaction patterns is needed to guide intervention in natural contexts of families (Fuligni & Brooks-Gunn, 2013). Parent-child interaction data were collected from 44 mothers and 35 fathers interacting with their children (23 to 47 months) who had a disability and were in one of eight Spanish Early Interventions Centers. Mothers and fathers, separately, auto-recorded 10-minute play sessions at home. Parental interactions were assessed using PICCOLO (Roggman et al., 2013), a standardized measure of parenting. Two independent observers coded the interactions; strong intra-class correlation coefficients were found (.82 to .97 for mothers, .77 to .89 for fathers). The BSID-III scales (Bayley, 2015) assessed children’s development. Mothers scored slightly higher than did fathers. Scores varied by PICCOLO domains but were consistent with other PICCOLO studies of typical developing children (Roggman et al., 2013). Mother and father’s scores correlated indicating that the higher the scores of mothers in any dimension correlated with those of the parents combined. Positive significant Pearson correlations were found between parenting and child’s development with different patterns of father and mother domains predicting better language and cognitive outcomes. Although barriers to optimal parenting need further investigation, PICCOLO can be a useful tool to support optimal parenting.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Penerapan Model Pembelajaran Kooperatif Tipe Murder untuk Meningkatkan Prestasi Belajar Siswa pada Pokok Bahasan Koloid di Kelas XI IPA SMA Negeri 1 Kampar Timur

This study aims to determine Improved student achievement on thesubject of colloids with the implementation of cooperative learning model MURDERand the effect of the application of cooperative learning model MURDER to increasedstudent achievement on the subject of colloids in Class XI IPA SMAN 1 Kampar Timur.This research is a form of experimental research with the draft design randomizedcontrol group pretest-posttest. The study population was all students of class XI IPA atSMAN 1 Kampar Timur. The samples were students of class XI IPA 3 as experimentalclass and class XI IPA 4 as the control class. The experimental class was appliedcooperative learning model MURDER, while the control class using discussion method.Data were analyzed using t-test. Results from the study showed t count> t table (3.61>1.67) and the coefficient of influence by 17.33%, so it can be concluded theimplementation of cooperative learning model MURDER can improve the studentachievement on the subject of colloids in class XI IPA SMAN 1 Kampar Timur

Analisis Keramik Hias Gerabah Plered Untuk Pangsa Export Tahun 2010-2013

Metode penelitian yang digunakan adalah metode penelitian deskriptif dengan pendekatan kualitatif, lokasi penelitian ini adalah industri keramik Jaka Perkasa yang bertempat di Desa Anjun Kecamatan Plered Kabupaten Purwakarta. Teknik pengumpulan data yang digunakan dalam penelitian ini antara lain: observasi, wawancara, studi pustaka dan dokumentasi.Kriya keramik yang dihasilkan industri Jaka Perkasa merupakan produk keramik untuk memenuhi kebutuhan pasar baik export maupun lokal yang dibuat oleh kriyawan keramik Plered dengan PT Joshua sebagai eksportirnya. Keberadaannya merupakan adanya perkembangan bagi kriyawan keramik Plered yang tidak hanya menghasilkan produk lokal namun ada juga produk keramik yang dihasilkan kriyawan Plered untuk skala Internasional.Berdasarkan hasil penelitian dapat disimpulkan bahwa dalam proses pembentukan keramik pangsa export bahan utama yang digunakan adalah tanah liat puder yang dicampur dengan lumpur dan pasir halus yang dibentuk dengan teknik putar dengan bantuan meja putar (perbot) yang digerakan secara manual oleh tangan. Proses dekorasi yang berbeda-beda tekniknya dengan suhu pembakaran 900° Celsius. Bentuk keramik yang dibuat pengembangan dari bentuk silinder dengan pemberian motif geometris dan stilasi tumbuhan. Penggunaan warna pada keramik memperlihatkan unsur gelap terang dengan tekstur permukaan keramik ada yang halus dan kasar, tekstur kasar dapat dilihat pada permukaan benda keramik dengan proses dekorasi menggunakan teknik gosok

Analisis Pengaruh Kualitas Layanan Dan Kualitas Produk Terhadap Loyalitas Pelanggan Pada Online Shop Menggunakan Structural Equation Modeling

Semakin meningkatnya jumlah pengguna internet membawa dampak yang besar bagi dunia bisnis dengan berbelanja lewat internet sebagai lifestyle. Fenomena ini membuat para pebisnis mulai beralih dari pemasaran tradisional ke pemasaran modern seperti membuka toko online lewat website maupun social media. Penelitian ini bertujuan menganalisa pengaruh kualitas layanan dan kualitas produk terhadap loyalitas pelanggan pada online shop. Model yang dipakai adalah model e-SERVQUAL dan metode analisisnya menggunakan structural equation modeling (SEM). Hasil dari penelitian ini menunjukkan adanya hubungan antara kualitas layanan dan kualitas produk terhadap loyalitas pelanggan pada online shop. Variabel indikator daya tanggap memiliki pengaruh yang paling besar terhadap variabel kualitas layanan pada online shop. Sedangkan, variabel indikator daya tahan memiliki pengaruh yang paling besar terhadap variabel kualitas produk pada online shop

Peramalan Outflow Uang Kartal Di Bank Indonesia Wilayah Jawa Tengah Dengan Metode Generalized Space TIME Autoregressive (Gstar)

Generalized Space Time Autoregressive (GSTAR) model is a method that has interrelation between time and location or called with space time data. This model is generalization of Space Time Autoregressive (STAR) model where GSTAR more flexible for data with heterogeneous location characteristics. The purposes of this research are to get the best GSTAR model that will be used to forecast the outflow in the Bank Indonesia Office (BIO) Semarang, Solo, Purwokerto and Tegal. The best model obtained in this study is GSTAR (11) I(1) using the inverse distance weighting locations. This model has an average value of MAPE 35.732% and RMSE 440.52. The best model obtained explains that the outflow in BIO Semarang, Solo and Purwokerto are affected by two time lag before while for outflow in BIO Tegal is affected by two time lag befor and outflows in three other BIO