Precise Modelling of Compensating Business Transactions and its Application to BPEL

We describe the StAC language which can be used to specify the orchestration of activities in long running business transactions. Long running business transactions use compensation to cope with exceptions. StAC supports sequential and parallel behaviour as well as exception and compensation handling. We also show how the B notation may be combined with StAC to specify the data aspects of transactions. The combination of StAC and B provides a rich formal notation which allows for succinct and precise specification of business transactions. BPEL is an industry standard language for specifying business transactions and includes compensation constructs. We show how a substantial subset of BPEL can be mapped to StAC thus demonstrating the expressiveness of StAC and providing a formal semantics for BPEL

NIK MENJADI NPWP. APA YANG BARU?

Artikel ini bertujuan untuk menjelaskan perubahan format NPWP dari sebelumnya 15 Digit menjadi 16 Digit. Artikel ini menggunakan metode kualititatif dengan metode studi kepustakaan. Selain NPWP yang berubah menjadi NIK, untuk menciptakan keseragaman format NPWP, NPWP wajib pajak badan, wajib pajak instansi pemerintah, dan wajib pajak orang pribadi warga negara asing juga diubah menjadi 16 digit dengan menambahkan angka 0 di depan NPWP sebelumnya. Selain itu, wajib pajak dengan status cabang akan menggunakan Nomor Identitas Tempat Kegiatan Usaha (NITKU) yang akan diberikan oleh DJP. Meskipun penggunaan NPWP 16 digit mulai berlaku pada tanggal 14 Juli 2022, sampai 31 Desember 2023, wajib pajak tetap dapat menggunakan NPWP 15 digit atau NIK sebagai identitas perpajakan. NPWP 15 digit tidak dapat digunakan lagi mulai tanggal 1 Januari 202

Application of homogeneously precipitated nanosized Fe-doped alumina powders to carbon nanotube growth.

Homogeneous precipitation of hydroxides was investigated as an alternative method to synthesize Fe-doped aluminum oxide (α-Al2−2xFe2xO3) particles over which carbon nanotubes (CNTs) were grown via a catalytic chemical vapor deposition (CCVD) method. Performance of the homogeneously precipitated particles for CNT growth was quantitatively compared with that of the combustion-synthesized particles. The main advantage of the homogeneous precipitation of hydroxides and subsequent calcination process against to the combustion synthesis and other commonly practiced chemical routes is the ability to tailor the Fe-doped Al2O3 precursor powder characteristics such as size and specific surface area (SSA) without requiring any milling step and also to control the phase composition of the oxide powder with high Fe content, and subsequently the quality and quantity of CNTs during CCVD process. The particle size of the precipitated and calcined α-Al2−2xFe2xO3 powders varies between ∼50 and 400 nm for 5–10 cat.% Fe-containing systems. The monodispersed particle size distribution and optimum phase composition of the homogeneously precipitated powders, particularly for a 10 cat.% Fe content in the starting oxide, and their much higher SSA than similar materials prepared by other chemical routes lead to production of high amounts of good quality CNTs

Predictive maintenance for industry 4.0, a holistic approach to performing predictive maintenance as a service.

In modern collaborative industry, the machine equipment involved has rapidly increased. Many of the involved machines are complex and can only work in good maintenance conditions. Any failure of this equipment and related tools can easily lead to unintended disruption. Due to the collaborative nature of the manufacturing systems, one machine failure could result in undesired downtimes beyond single production lines and add costs to the value-added processes of the partner enterprises in the entire value chain. Industry 4.0 provides a concept of the interoperation of data, processes, and services within one enterprise as well as interoperation among different partner organizations. This increases dependencies and potential for failure related costs. There is, however, a lack of work that focusses on predictive maintenance services in the context of Industry 4.0 supported architecture and standards. This thesis looks at how data-driven predictive maintenance under existing Industry 4.0 concepts, architecture, and platforms can be supported. A flexible predictive maintenance case is used to design the predictive maintenance modules that fit within the industry standard Reference Architectural Model Industrie 4.0 (RAMI 4.0) model. Beyond looking at predictive maintenance for a specific manufacturing type, the research further looks at predictive maintenance as a service as well as forming a virtual factory specialized in supporting predictive maintenance. Adopting the design science research methodology, the dissertation designs Industry 4.0 Predictive Maintenance Architecture, algorithms of predictive maintenance modules for estimating RUL (Remaining Useful Life) and maintenance scheduling modules for supporting multiple machines/components. The design of architecture and algorithms are implemented within the leading FIWARE platform. The results are verified in terms of performance. The modular predictive model achieves higher accuracy and lower RMSE score at over 19% than comparator methods. The predictive maintenance service enabled by designed algorithms of predictive model and maintenance service scheduling can offer over 30% for optimal cost and 10% for downtime impact to the manufacturing network

Flujos de indocumentados mexicanos a Estados Unidos : historia y determinantes.

Tesina (Licenciatura en Sociología) - Universidad Autónoma Metropolitana, Unidad Azcapotzalco, División de Ciencias Sociales y Humanidades, Departamento de Sociología, 1992. UAMADCSHDS.1 archivo PDF (150 páginas)Se analizan y delimitan las principales determinantes de los flujos de indocumentados mexicanos a Estados Unidos, ya que esto constituye un aspecto fundamental del fenómeno migratorio

Microstructure of Silica in the Presence of Iron Oxide

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/65543/1/j.1151-2916.1960.tb14328.x.pd

A Predictive Maintenance Model for Flexible Manufacturing in the Context of Industry 4.0

The Industry 4.0 paradigm is the focus of modern manufacturing system design. The integration of cutting-edge technologies such as the Internet of things, cyber–physical systems, big data analytics, and cloud computing requires a flexible platform supporting the effective optimization of manufacturing-related processes, e.g., predictive maintenance. Existing predictive maintenance studies generally focus on either a predictive model without considering the maintenance decisions or maintenance optimizations based on the degradation models of the known system. To address this, we propose PMMI 4.0, a Predictive Maintenance Model for Industry 4.0, which utilizes a newly proposed solution PMS4MMC for supporting an optimized maintenance schedule plan for multiple machine components driven by a data-driven LSTM model for RUL (remaining useful life) estimation. The effectiveness of the proposed solution is demonstrated using a real-world industrial case with related data. The results showed the validity and applicability of this work

Solubility of nickel in slags equilibrated with Ni-S melt

To provide thermodynamic data for converting the nickel matte to liquid nickel, an experimental study was conducted in the phase equilibrium between the Ni-S melt and FeOX-SiO2, FeOX-CaO or CaO-Al2O3 based slag melted in a magnesia crucible at 1773 and 1873 K. pSO2 was controlled at 10.1 kPa while pO2 and pS2 ranged between those where NiO precipitated and Ni3S2 formed, respectively. The nickel content in the slag and the sulfur content in the metal at given pO2 and pS2 were smallest for the CaO-Al2O3 based slag. Both decreased with increasing temperature. At 1873 K, the content of nickel in the CaO-Al2O3 based slag at pO2 of 10 Pa (near the precipitation of NiO) was 4%, while the content of sulfur in alloy is 0.4 mass %. Thus, the CaO-Al2O3 base slag at 1873 K would be suitable for direct converting of Ni3S2 to metallic nickel. The distribution behavior of nickel between the slag and the Ni-S melt was discussed based on the concept of oxidic and sulfidic dissolution

Physicochemical parameters of Bakun Reservoir in Belaga, Sarawak, Malaysia 13 months after reaching full supply level

Determining the water quality of Bakun Reservoir 13 months after it operates at full supply level is crucial for better understanding of changes in the physicochemical parameters, which may enable the prediction of its effects on the survival of aquatic life in the reservoir. This study determined 13 physicochemical parameters at six stations within the reservoir at fixed depths. The results showed that the minimum 5 mg/L of dissolved oxygen (DO) required for sensitive aquatic organisms was recorded at 6 m depth. However, DO was not detectable at depths exceeding 7 m. The water was acidic at depths of more than 10 m. Turbidity and total suspended solids increased corresponding with depth. Inorganic nitrogen were predominantly in the form of ammonia-nitrogen, creating an unhealthy environment for aquatic life. Concentration of Chl-a was significantly higher at the subsurface water than 30 m depth in four out of six stations. The present study shows changes in water quality as compared to the pre-impounded period and 15 months after the filling phase, in particular, stratification of dissolved oxygen, thermocline conditions and alkalinity. The changes varied according to the distance from the dam and may have been influenced by existing land developments within the area such as the construction of the Murum Hydroelectric Dam, oil palm plantations and timber concessionares. Though the water quality might have deteriorated, further study is needed to determine if this condition will prolong

Partnership for the sustainable development of Tadlak Lake, Laguna, Philippines

Abstract only.Tadlak Lake is one of the several crater lakes of Laguna Province. It is located in Barangay Tadlak, Los Banos, Laguna, Philippines. It lies southwest of Laguna de Bay, 14°11 14 to 14°10 56 north and 121° 12 10.2 to 121°12 26.8 east. It has a surface area of 24.75 ha and a mean depth of 27 m. The watershed area is 60 ha, of which the striking feature is the quarried portion that cuts through the divide. From the 1980s up to the late 1990s, fishcages almost occupied the entire lake. A massive fishkill occurred in February 1999 that almost wiped out the entire stock with an estimated cost of P4,000.000. The crisis served as a catalyst for the community of Tadlak Lake to work closely with the Laguna Lake Development Authority (LLDA) and put all their efforts in saving the lake from further deterioration. The cause was championed by the Barangay Council and the Barangay Fisheries and Aquatic Resource Management Council. The political will of the barangay executives proved very successful in convincing the fishcage operators to stop their business operation. They were given the option to transfer to the fishcage belt in Laguna de Bay. Collaborative work with the Philippine Council for Aquatic and Marine Research and Development (PCAMRD), the Bureau of Fisheries and Aquatic Resources (BFAR) and Ugnayan sa Los Banos was pursued to sustain the efforts in planning for the sustainable use of the lake. Initial activities include the physical clean-up of the lake through bayanihan , fund raising campaigns, and voluntary dismantling of fishcages and huts along the lakeshore. On June 29, 2000, the LLDA Board of Directors issued a resolution banning aquaculture in the lake, initially for two years. A private owner donated a 4 m wide right of way to reach the lake from the adjacent barangays of Sucol and Masile. Other activities were also implemented such as the multi-stakeholders visioning and planning session for the development of Tadlak Lake as an ecological destination and the seeding of the lake with species that do not breed in the lake. The wisdom behind the move is to give room for control in case of competition with native species. A moratorium on open fishing was also imposed until the stocked species reached marketable size. In essence, the lake became a one big aquaculture area for the benefit of the community. There is still much to be pursued but the community never relents on their commitment to save the lake