Ss performed 4 simultaneous probability-learning tasks under either speed or accuracy instructions. When the 4 IT values were the same, Ss tended to overshoot matching under accuracy instructions, but under speed instructions overshot only at higher TT values. When the 4 TT values were not the same, there was a tendency to overshoot for lower TT values, but not higher ones. Ss consistently responded faster at higher IT values and the increase in speed was linear as w increased from .50 to 1.00. Ss' subjective estimates of TT suggested that they rather consistently overshot their ir estimates by 5-10 percentage points (except when IT =1.00). These results were discussed with respect to stimulus-sampling theories of probability learning.

Abstrak PT. CDE merupakan suatu perusahaan yang bergerak di bidang industri manufaktur alat berat. Salah satu produk yang dihasilkan oleh PT. CDE adalah bucket tipe ZX 200 GP. Berdasarkan data produksi yang diperoleh dari bulan Mei 2013 hingga September 2013, jenis kegagalan produk yang paling banyak ditemui adalah jenis cacat undercut. Dalam penelitian ini, pengendalian kualitas dilakukan dan dianalisis dengan menggunakan metode Statistical Process Control dan Failiure Mode and Effect Analysis (FMEA). Jenis FMEA yang digunakan adalah FMEA proses. Hasil analisis mengidentifikasi beberapa akar permasalahan utama yang menjadi penyebab munculnya kegagalan pada jenis cacat undercut yaitu: penyetelan mesin yang kurang tepat, kotornya ujung mata las, penggunaan mesin secara terus menerus, pemakaian kawat terlalu sedikit, kurang pemeriksaan kualitas, kemiringan elektroda yang kurang tepat, kecepatan pengelasan terlalu tinggi, kurang pengawasan kerja, dan pekerja yang kurang terampil. Maka daripada itu, dalam makalah ini diusulkan beberapa tindakan perbaikan kepada pihak manajemen untuk mengurangi kecacatan undercut yang terjadi, antara lain: mempekerjakan welder yang telah bersertifikasi, mengurangi kecepatan pengelasan sesuai dengan ketebalan material, melakukan pengarahan mengenai kemiringan elektroda yang sesuai dengan posisi pengelasan, mengatur besar arus dan tegangan pengelasan sesuai dengan tebal bahan dan diameter kawat elektroda, melakukan pemeriksaan kualitas secara rutin dan segera melakukan tindakan perbaikan bila terjadi kegagalan saat produksi. Kata kunci: Pengendalian Kualitas, Statistical Process Control, Failure Mode and Effect Analysis

The inspiration for a mission statement of this project arose out of concerns articulated by Drs. Clyde W. Frank, Caroline B. Purdy, and William C. Schutte of OTD, who believed that measurable goals for DOE's environmental technology development projects were lacking.

Recently there has been much concern with the ability of plants to uptake heavy metals from their surroundings. With the development of instrumental techniques with low detection limits such as inductively coupled plasma-mass spectrometry (ICP-MS), attention is shifting toward achieving faster and more elegant ways of oxidizing the organic material inherent in environmental samples. Closed-vessel microwave dissolution was compared with conventional methods for the determination of concentrations of cerium, samatium, europium, t sr b' ium, uranium and thorium in a series of samples from the National Institute of Standards and Technology and from fields in Idaho. The ICP-MS technique exhibited detection limits in partsper-trillion and linear calibration plots over three orders of magnitude for the elements under study. The results obtained by using nitric acid and hydrogen peroxide in a microwave digestion system for the analysis of reference materials showed close agreement with the accepted values.These values were compared with results obtained from dry-and wet-ashing procedures. The findings from an experiment comparing radiometric techniques for the determination of actinide elements to ICP-MS are reported. DISCLAIMERThis report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor my of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. INTR0DC:CTIONAs a result of ongoing industrial pollution and the vital role of plants in the food chain, interest has increased in the ability of plants to uptake potentially hazardous heavy metals from their surroundings. Much attention has also been given to the field of radiological safety, including the determination of small amounts of actinide elements in botanical tissues, as a component of individual contamination-monitoring problems (1). Because environmental samples have large amounts of organic matrix elements but may have low concentrations of the rare earth elements, a digestion procedure whereby the organic matrix is oxidized, leaching the metals from the matrix, must be coupled with an instrumental technique with characteristically low limits of detection.Problems typically arising from the determination of elements in environmental samples are not associated with the efficiency of the instrumental method, but rather ...

This report was prepared as an account of '_¥ork sponsored by the United States Government. Netthet the United States nor the United States Atomic Energy Commission, nor any of their employee~, nor any of their contractors, subcontractors, or thetr employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, com• pleteness or usefulness of any information, app~ratus, product or process disclosed, or represents that 1ts use would not infringe privately owned rights.