Volume 15

Procedia CIRP

Volume 15

1

Resource Efficiency-oriented Optimization of Material Flow Networks in Chemical Process Engineering

Zschieschang, Eva, Denz, Nicolas, Lambrecht, Hendrik, Viere, Tobias

Journal:

Year:

2014

Language:

english

File:

PDF, 467 KB

english, 2014

2

On-line Recycling of Abrasives in Abrasive Water Jet Cleaning

Dong, Yazhou, Liu, Weiwei, Zhang, Heng, Zhang, Hongchao

Journal:

Year:

2014

Language:

english

File:

PDF, 789 KB

english, 2014

3

Analysis of Energy Efficiency of Different Setups Able to Perform Single Point Incremental Forming (SPIF) Processes

Ambrogio, Giuseppina, Ingarao, Giuseppe, Gagliardia, Francesco, Di Lorenzo, Rosa

Journal:

Year:

2014

Language:

english

File:

PDF, 852 KB

english, 2014

4

Reusability based on Life Cycle Sustainability Assessment: Case Study on WEEE

Lu, Bin, Li, Bo, Wang, Lihui, Yang, Jianxin, Liu, Jingru, Wang, Xi Vincent

Journal:

Year:

2014

Language:

english

File:

PDF, 322 KB

english, 2014

5

Study of Life Cycle Design Focusing on Resource Balance throughout Product Life Cycles

Matsuyama, Yuki, Matsuno, Tomohiko, Fukushige, Shinichi, Umeda, Yasushi

Journal:

Year:

2014

Language:

english

File:

PDF, 1011 KB

english, 2014

6

Predictive Model for Environmental Assessment in Additive Manufacturing Process

Le Bourhis, Florent, Kerbrat, Olivier, Dembinski, Lucas, Hascoet, Jean-Yves, Mognol, Pascal

Journal:

Year:

2014

Language:

english

File:

PDF, 965 KB

english, 2014

7

Why Upgradability should be Considered for Rationalizing Materials?

Pialot, O., Millet, D.

Journal:

Year:

2014

Language:

english

File:

PDF, 1.23 MB

english, 2014

8

Simplified Life Cycle Assessment of a Hybrid Car Body Part

Klocke, F., Kampker, A., Döbbeler, B., Maue, A., Schmieder, M.

Journal:

Year:

2014

Language:

english

File:

PDF, 448 KB

english, 2014

9

Resource Efficiency Learning Game – electric Scooter Game

Reise, Carsten, Müller, Bastian, Seliger, Günther

Journal:

Year:

2014

Language:

english

File:

PDF, 456 KB

english, 2014

10

A Framework for Environmental and Energy Analysis of the Automobile Painting Process

Rivera, Julio L., Reyes-Carrillo, Tatiana

Journal:

Year:

2014

Language:

english

File:

PDF, 685 KB

english, 2014

11

Modular Design of Machine Tools to Facilitate Design for Disassembly and Remanufacturing

PengjiaWang,, Liu, Yongxian, Ong, S.K., Nee, A.Y.C.

Journal:

Year:

2014

Language:

english

File:

PDF, 446 KB

english, 2014

12

Eco-efficiency of Alternative and Conventional Cutting Fluids in External Cylindrical Grinding

Winter, Marius, Herrmann, Christoph

Journal:

Year:

2014

Language:

english

File:

PDF, 438 KB

english, 2014

13

Derivation of Measures for Energy Efficient Machine Design by Evaluating Energy Consumption Data

Böhner, Johannes, Hamacher, Moritz, Reger, Arnim, Steinhilper, Rolf

Journal:

Year:

2014

Language:

english

File:

PDF, 723 KB

english, 2014

14

Economic and Environmental Aware Maintenance Optimization

Van Horenbeek, Adriaan, Kellens, Karel, Pintelon, Liliane, Duflou, Joost R.

Journal:

Year:

2014

Language:

english

File:

PDF, 504 KB

english, 2014

15

Energy System Design to Maximize Net Energy Production Considering Uncertainty in Scale-up: A Case Study in Artificial Photosynthesis

Walczak, Karl A., Hutchins, Margot J., Dornfeld, David

Journal:

Year:

2014

Language:

english

File:

PDF, 436 KB

english, 2014

16

How to Improve Environmental Performance by Negotiating Functional Specifications of Complex System?

Tchertchian, Nicolas, Millet, Dominique, Yvars, Pierre-Alain

Journal:

Year:

2014

Language:

english

File:

PDF, 385 KB

english, 2014

17

Reliability of the Sustainability Assessment

Junior, Durval João De Barba, Gomes, Jefferson de Oliveira, Bork, Carlos Alberto Schuch

Journal:

Year:

2014

Language:

english

File:

PDF, 288 KB

english, 2014

18

Development of a Supporting Tool for Sustainable FMCG Packaging Designs

Srinivasan, Srinath, Lu, Wen F.

Journal:

Year:

2014

Language:

english

File:

PDF, 596 KB

english, 2014

19

Predictive Analytics Model for Power Consumption in Manufacturing

Shin, Seung-Jun, Woo, Jungyub, Rachuri, Sudarsan

Journal:

Year:

2014

Language:

english

File:

PDF, 514 KB

english, 2014

20

A Framework to Integrate the End-of-Life Aircraft in Preliminary Design

Ribeiro, Júnior Sousa, Gomes, Jefferson de Oliveira

Journal:

Year:

2014

Language:

english

File:

PDF, 440 KB

english, 2014

21

The Method for Assessment of the Sustainability Maturity in Remanufacturing Companies

Golinska, Paulina, Kuebler, Frank

Journal:

Year:

2014

Language:

english

File:

PDF, 674 KB

english, 2014

22

Material and Energy Efficiency Analysis of Low Pressure Chemical Vapor Deposition of TiO2 Film

Wang, Fenfen, Zhu, Nanjing, Li, Tao, Zhang, Hong-Chao

Journal:

Year:

2014

Language:

english

File:

PDF, 382 KB

english, 2014

23

Energy Efficient Trajectories for an Industrial ABB Robot

Paes, Koen, Dewulf, Wim, Elst, Karel Vander, Kellens, Karel, Slaets, Peter

Journal:

Year:

2014

Language:

english

File:

PDF, 2.85 MB

english, 2014

24

Eco-innovation by Integrating Biomimetic Design and ARIZ

Chen, Wang-Chih, Chen, Jahau Lewis

Journal:

Year:

2014

Language:

english

File:

PDF, 440 KB

english, 2014

25

Strategies to Improve Industrial Energy Efficiency

O’Rielly, K., Jeswiet, J.

Journal:

Year:

2014

Language:

english

File:

PDF, 456 KB

english, 2014

26

Conceptual Framework for Near-to-site Waste Cycle Design

Steingrímsson, Jón Garðar, Seliger, Günther

Journal:

Year:

2014

Language:

english

File:

PDF, 377 KB

english, 2014

27

Evaluating Measures for Adapting the Energy Demand of a Production System to Volatile Energy Prices

Graßl, Markus, Reinhart, Gunther

Journal:

Year:

2014

Language:

english

File:

PDF, 403 KB

english, 2014

28

Integrated Material and Energy Flow Analysis towards Energy Efficient Manufacturing

Ghadimi, Pouya, Li, Wen, Kara, Sami, Herrmann, Christoph

Journal:

Year:

2014

Language:

english

File:

PDF, 842 KB

english, 2014

29

Prioritizing Drivers for Green Manufacturing: Environmental, Social and Economic Perspectives

Mittal, Varinder Kumar, Sangwan, Kuldip Singh

Journal:

Year:

2014

Language:

english

File:

PDF, 385 KB

english, 2014

30

An Optimal Timing of Engine Remanufacturing – A Real Option Approach

Liu, Zhichao, Jiang, Qiuhong, Li, Tao, Zhang, Hongchao

Journal:

Year:

2014

Language:

english

File:

PDF, 482 KB

english, 2014

31

Scenario Analysis of Regional Electricity Demand in the Residential and Commercial Sectors – influence of Diffusion of Photovoltaic Systems and Electric Vehicles into Power Grids

Iwai, Naoki, Kurahashi, Naoto, Kishita, Yusuke, Yamaguchi, Yohei, Shimoda, Yoshiyuki, Fukushige, Shinichi, Umeda, Yasushi

Journal:

Year:

2014

Language:

english

File:

PDF, 444 KB

english, 2014

32

A Model-based Approach to Energy-saving Manufacturing Control Strategies

Langer, Tino, Schlegel, Andreas, Stoldt, Johannes, Putz, Matthias

Journal:

Year:

2014

Language:

english

File:

PDF, 534 KB

english, 2014

33

Recycling Mobile Phone Impact on Life Cycle Assessment

Soo, Vi Kie, Doolan, Matthew

Journal:

Year:

2014

Language:

english

File:

PDF, 811 KB

english, 2014

34

Increasing the Resource Efficiency of Machine Tools by Life Cycle Oriented Services

Mert, Gülsüm, Bohr, Christian, Waltemode, Sebastian, Aurich, Jan C.

Journal:

Year:

2014

Language:

english

File:

PDF, 380 KB

english, 2014

35

CDMF-RELSUS Concept: Reliable and Sustainable Products–influences on Design, Manufacturing, Layout Integration and Use Phase

Bracke, Stefan, Inoue, Masato, Ulutas, Berna, Yamada, Tetsuo

Journal:

Year:

2014

Language:

english

File:

PDF, 520 KB

english, 2014

36

Second Generation of Pressure Sensitive Fasteners for Active Disassembly

Peeters, Jef R., Van den Bossche, Wannes, Devoldere, Tom, Dewulf, Wim, Duflou, Joost R.

Journal:

Year:

2014

Language:

english

File:

PDF, 476 KB

english, 2014

37

Procedure of Modular Green Factory Planning to Enhance Collaboration and Decision Making

Mueller, Florian, Cannata, Alessandro, Herrmann, Christoph

Journal:

Year:

2014

Language:

english

File:

PDF, 633 KB

english, 2014

38

“Low-Cost” Tools Through Life Cycle Observation

Schuh, Günther, Schmitt, Robert, Kühn, Thomas, Hienzsch, Martin

Journal:

Year:

2014

Language:

english

File:

PDF, 459 KB

english, 2014

39

Direct Electrical Energy Demand in Fused Deposition Modelling

Balogun, Vincent A., Kirkwood, Neil D., Mativenga, Paul T.

Journal:

Year:

2014

Language:

english

File:

PDF, 878 KB

english, 2014

40

Remaining Useful Life Assessment and its Application in the Decision for Remanufacturing

Hu, Yawei, Liu, Shujie, Lu, Huitian, Zhang, Hongchao

Journal:

Year:

2014

Language:

english

File:

PDF, 453 KB

english, 2014

41

Energy Efficiency Optimization of Joining Processes on Shop Floor and Process Chain Level

Mose, Christian, Weinert, Nils

Journal:

Year:

2014

Language:

english

File:

PDF, 581 KB

english, 2014

42

Part Agent that Proposes Replacement of a Part Considering its Life Cycle Using a Bayesian Network

Nanjo, Keisuke, Yamamori, Yuki, Kawaharada, Hiroshi, Hiraoka, Hiroyuki

Journal:

Year:

2014

Language:

english

File:

PDF, 1.51 MB

english, 2014

43

Effects of Climate Change on Factory Life Cycle

Dombrowski, U., Ernst, S.

Journal:

Year:

2014

Language:

english

File:

PDF, 336 KB

english, 2014

44

Energy Efficiency of Compressed Air Systems

Mousavi, Smaeil, Kara, Sami, Kornfeld, Bernard

Journal:

Year:

2014

Language:

english

File:

PDF, 655 KB

english, 2014

45

A Review of Lithium Supply and Demand and a Preliminary Investigation of a Room Temperature Method to Recycle Lithium Ion Batteries to Recover Lithium and Other Materials

Sonoc, Alexandru, Jeswiet, Jack

Journal:

Year:

2014

Language:

english

File:

PDF, 544 KB

english, 2014

46

An Evaluation Method Based on Mechanical Parts Structural Characteristics for Proactive Remanufacturing

Zhou, Xuan, Ke, Qingdi, Song, Shouxu, Liu, Ming

Journal:

Year:

2014

Language:

english

File:

PDF, 375 KB

english, 2014

47

Editorial

Journal:

Year:

2014

Language:

english

File:

PDF, 244 KB

english, 2014

48

A Tool for Detailed Analysis and Ecological Assessment of the Use Phase

Serna-Mansoux, Livier, Domingo, Lucie, Millet, Dominique, Brissaud, Daniel

Journal:

Year:

2014

Language:

english

File:

PDF, 715 KB

english, 2014

49

Life Cycle Assessment of a Diesel Engine Based on an Integrated Hybrid Inventory Analysis Model

Jiang, Qiuhong, Liu, Zhichao, Li, Tao, Zhang, Hongchao, Iqbal, Asif

Journal:

Year:

2014

Language:

english

File:

PDF, 619 KB

english, 2014

50

Energy and Material Flow Analysis of Binder-jetting Additive Manufacturing Processes

Meteyer, Simon, Xu, Xin, Perry, Nicolas, Zhao, Yaoyao Fiona

Journal:

Year:

2014

Language:

english

File:

PDF, 738 KB

english, 2014

51

Proposal of an Eco-design Framework based on a Design Education Perspective

Vallet, Flore, Eynard, Benoît, Millet, Dominique

Journal:

Year:

2014

Language:

english

File:

PDF, 784 KB

english, 2014

52

Investigation of Advanced Energy Saving Stand by Strategies for Production Systems

Weinert, Nils, Mose, Christian

Journal:

Year:

2014

Language:

english

File:

PDF, 1.20 MB

english, 2014

53

Proposal of a Model for Life Cycle Optimization of Industrial Equipment

Cerri, Daniele, Taisch, Marco, Terzi, Sergio

Journal:

Year:

2014

Language:

english

File:

PDF, 431 KB

english, 2014

54

Developing a Library of Sustainable Manufacturing Practices

Roberts, S.J.F., Ball, P.D.

Journal:

Year:

2014

Language:

english

File:

PDF, 313 KB

english, 2014

55

Remanufacturing Process Planning

Kin, S. Tsang Mang, Ong, S.K., Nee, A.Y.C.

Journal:

Year:

2014

Language:

english

File:

PDF, 454 KB

english, 2014

56

Proof of Concept of an Elastomer based Fastener Enabling Rapid Disassembly

Van den Bossche, Wannes, Peeters, Jef R., Devoldere, Tom, Duflou, Joost R., Dewulf, Wim

Journal:

Year:

2014

Language:

english

File:

PDF, 814 KB

english, 2014

57

TRIZ Innovative Design Method for Eco-leasing Type Product Service Systems

Chen, Jahau Lewis, Jiao, Wei-Su

Journal:

Year:

2014

Language:

english

File:

PDF, 328 KB

english, 2014

58

Scenario Analysis of the Diffusion of Fuel Cells in the Residential Sector

Kishita, Yusuke, Nakamura, Yasuaki, Kegasa, Akeshi, Hisazumi, Yoshinori, Hori, Tsukasa, Fukushige, Shinichi, Umeda, Yasushi

Journal:

Year:

2014

Language:

english

File:

PDF, 421 KB

english, 2014

59

Energy Quality Hierarchy and “Transformity” in Evaluation of Product's Working Principles

Midžić, Ida, Štorga, Mario, Marjanović, Dorian

Journal:

Year:

2014

Language:

english

File:

PDF, 642 KB

english, 2014

60

Do-it-yourselfers as Lead users for Environmentally Conscious Behavior

Lai, Song-Liang, Shu, L.H.

Journal:

Year:

2014

Language:

english

File:

PDF, 2.47 MB

english, 2014

61

Extending Energy Value Stream Models by the TBS Dimension – Applied on a Multi Product Process Chain in the Railway Industry

Posselt, G., Fischer, J., Heinemann, T., Thiede, S., Alvandi, S., Weinert, N., Kara, S., Herrmann, C.

Journal:

Year:

2014

Language:

english

File:

PDF, 371 KB

english, 2014

62

Fuzzy Reliability Estimation for Cutting Tools

Liu, Shujie, Zhang, Hongchao, Li, Chao, Lu, Huitian, Hu, YaWei

Journal:

Year:

2014

Language:

english

File:

PDF, 749 KB

english, 2014

63

Requirement based Future Product Cost Estimation using Lifecycle Assessment Data

Heller, Jan Erik, Löwer, Manuel, Feldhusen, Jörg

Journal:

Year:

2014

Language:

english

File:

PDF, 414 KB

english, 2014

64

Energy Efficient Control Strategy for Machine Tools with Stochastic Arrivals and Time Dependent Warm-up

Frigerio, Nicla, Matta, Andrea

Journal:

Year:

2014

Language:

english

File:

PDF, 839 KB

english, 2014

65

Supercritical Carbon Dioxide in Microelectronics Manufacturing: Marginal Cradle-to-grave Emissions

Supekar, Sarang D., Skerlos, Steven J.

Journal:

Year:

2014

Language:

english

File:

PDF, 2.05 MB

english, 2014

66

Supporting Resource Efficiency in Chemical Industries - IT-based Integration of Flow Sheet Simulation and Material Flow Analysis

Denz, Nicolas, Ausberg, Laura, Bruns, Michael, Viere, Tobias

Journal:

Year:

2014

Language:

english

File:

PDF, 711 KB

english, 2014

67

Using Actor Networks in Decision Making during Content-packaging Development

Luttikhuis, E.J. Oude, de Lange, J., Lutters, E., ten Klooster, R.

Journal:

Year:

2014

Language:

english

File:

PDF, 442 KB

english, 2014

68

Synergizing Industrialized and Developing Countries to Improve Resource Recovery for e–waste: Case Study Belgium–Kenya

Vanegas, Paul, Peeters, Jef R., Plessers, Frank, Cattrysse, Dirk, Duflou, Joost R.

Journal:

Year:

2014

Language:

english

File:

PDF, 560 KB

english, 2014

69

Quantification of End-of-life Product Condition to Support Product Recovery Decision

Ng, Yen Ting, Lu, Wen Feng, Song, Bin

Journal:

Year:

2014

Language:

english

File:

PDF, 470 KB

english, 2014

70

Disassembly Line Balancing and Sequencing under Uncertainty

Bentaha, Mohand Lounes, Battaïa, Olga, Dolgui, Alexandre

Journal:

Year:

2014

Language:

english

File:

PDF, 578 KB

english, 2014

71

The Impact of Maintenance and Technology Change on Remanufacturing as a Recovery Alternative for Used Wind Turbines

Ortegon, Katherine, Nies, Loring F., Sutherland, John W.

Journal:

Year:

2014

Language:

english

File:

PDF, 672 KB

english, 2014

72

Nano Insulation Materials: Synthesis and Life Cycle Assessment

Gao, Tao, Sandberg, Linn Ingunn C., Jelle, Bjørn Petter

Journal:

Year:

2014

Language:

english

File:

PDF, 1.13 MB

english, 2014

73

A Global Environmental Assessment of Electricity Generation Technologies with Low Greenhouse Gas Emissions

Gibon, Thomas, Hertwich, Edgar

Journal:

Year:

2014

Language:

english

File:

PDF, 414 KB

english, 2014

74

A Method for Pre-determining the Optimal Remanufacturing Point of Lithium ion Batteries

Zhang, Heng, Liu, Weiwei, Dong, Yazhou, Zhang, Hongchao, Chen, Hao

Journal:

Year:

2014

Language:

english

File:

PDF, 743 KB

english, 2014

75

Life Cycle Engineering for Materials and Technology Selection: Two Models, One Approach

Peças, Paulo, Ribeiro, Inês, Henriques, Elsa

Journal:

Year:

2014

Language:

english

File:

PDF, 1.47 MB

english, 2014

76

Resource-efficient Ball Screw by Adaptive Lubrication

Fleischer, J., Leberle, U., Maier, J., Spohrer, A.

Journal:

Year:

2014

Language:

english

File:

PDF, 907 KB

english, 2014

77

Definitions of Critical Nomenclature in Environmental Discussion

Jeswiet, J., Szekeres, A.

Journal:

Year:

2014

Language:

english

File:

PDF, 331 KB

english, 2014

78

A Method for the Estimation of the Economic and Ecological Sustainability of Production Lines

Germani, Michele, Mandolini, Marco, Marconi, Marco, Marilungo, Eugenia

Journal:

Year:

2014

Language:

english

File:

PDF, 443 KB

english, 2014

79

Automatic Dismantling Challenges in the Structural Design of LCD TVs

Elo, Kristofer, Sundin, Erik

Journal:

Year:

2014

Language:

english

File:

PDF, 411 KB

english, 2014

80

Product Remanufacturability Assessment based on Design Information

Fang, H.C., Ong, S.K., Nee, A.Y.C.

Journal:

Year:

2014

Language:

english

File:

PDF, 449 KB

english, 2014

81

Measuring the Time for Extracting Components in End-of-life Products: Needs for a Standardized Method and Aspects to be Considered

Mathieux, Fabrice, Recchioni, Marco, Ardente, Fulvio

Journal:

Year:

2014

Language:

english

File:

PDF, 384 KB

english, 2014

82

Comparative Eco-efficiency Analyses of Copper to Copper Bonding Technologies

Ng, Ruisheng, Nai, Mui Ling Sharon, Chan, Hian Leng Ian, Shi, Chee Wai Patrick, Song, Bin

Journal:

Year:

2014

Language:

english

File:

PDF, 864 KB

english, 2014

83

Comparison of the Embodied Energy of a Grinding Wheel and an End Mill

Kirsch, B., Effgen, C., Büchel, M., Aurich, J.C.

Journal:

Year:

2014

Language:

english

File:

PDF, 721 KB

english, 2014

84

Toward a Sustainable Business Design: A Survey

Kondoh, Shinsuke, Komoto, Hitoshi, Kishita, Yusuke, Fukushige, Shinichi

Journal:

Year:

2014

Language:

english

File:

PDF, 369 KB

english, 2014

85

Analysis and Integration of Design for X Approaches in Lean Design as basis for a Lifecycle Optimized Product Design

Dombrowski, Uwe, Schmidt, Stefan, Schmidtchen, Kai

Journal:

Year:

2014

Language:

english

File:

PDF, 359 KB

english, 2014

86

A Model- and Signal-based Power Consumption Monitoring Concept for Energetic Optimization of Machine Tools

Eberspächer, Philipp, Schraml, Philipp, Schlechtendahl, Jan, Verl, Alexander, Abele, Eberhard

Journal:

Year:

2014

Language:

english

File:

PDF, 823 KB

english, 2014

87

A Procedure to Define the Best Design Intervention Strategy on a Product for a Sustainable Behavior of the User

Cor, Emmanuelle, Zwolinski, Peggy

Journal:

Year:

2014

Language:

english

File:

PDF, 554 KB

english, 2014

88

Enabling Product Development Engineers to Select and Combine Methods for Sustainable Design

Buchert, Tom, Kaluza, Alexander, Halstenberg, Friedrich A., Lindow, Kai, Hayka, Haygazun, Stark, Rainer

Journal:

Year:

2014

Language:

english

File:

PDF, 712 KB

english, 2014

89

Design for Disassembly for Remanufacturing: Methodology and Technology

Soh, S.L., Ong, S.K., Nee, A.Y.C.

Journal:

Year:

2014

Language:

english

File:

PDF, 641 KB

english, 2014

90

Dynamic System for Life Cycle Inventory and Impact Assessment of Manufacturing Processes

Filleti, Remo A.P., Silva, Diogo A.L., Silva, Eraldo J., Ometto, Aldo R.

Journal:

Year:

2014

Language:

english

File:

PDF, 543 KB

english, 2014

91

Hierarchical Evaluation of Environmental Impacts from Manufacturing System and Machine Perspective

Heinemann, Tim, Schraml, Philipp, Thiede, Sebastian, Eisele, Christian, Herrmann, Christoph, Abele, Eberhard

Journal:

Year:

2014

Language:

english

File:

PDF, 754 KB

english, 2014

92

Life Cycle Assessment of Incandescent, Fluorescent, Compact Fluorescent and Light Emitting Diode Lamps in an Indian Scenario

Sangwan, Kuldip Singh, Bhakar, Vikrant, Naik, Shilpa, Andrat, Sylvi Nazareth

Journal:

Year:

2014

Language:

english

File:

PDF, 928 KB

english, 2014

To build up a library is to create a life. It’s never just a random collection of books.

— Carlos María Domínguez

Official channel

Z-Library Desktop Launcher

Tor version

Z-Library

Z-Library Since 2009 support@z-lib.do

EnglishРусскийEspañolItalianoελληνικάاللغة العربيةBahasa IndonesiaBahasa Malaysiaहिन्दीDeutschFrançaisPortuguêsУкраїнськаPolski中文繁體中文日本語Tiếng ViệtAzərbaycan DiliՀայոց լեզուภาษาไทยTürk Diliქართველიবাংলাپښتوతెలుగుاردو한국어SrpskiБългарски