Auswahl der wissenschaftlichen Literatur zum Thema „Cinematography – Special effects – History“

The subject of this research is prose of Alexander Grin, the object being the specifics of cinematographic perspective at the images of the Silver Age representative. The article covers both historical and theoretical aspects, its goal is to unveil the previously unknown archive documents (with material of RGALI foundation and Mosfilm) and experimental films, which add to the history of the usage of special effects in national cinema. The analysis of films conducted by the author of the article allows to examine the evolution of the aesthetics in sci-fi cinema in the period of 1960-2010. The article also unravels the little known aspects of the work of notable Russian animators.

Juliusz Słowacki has been acknowledged as a precursor of the Young Poland poets and recognized as one of the “Three Bards” of Polish Romanticism. A visionary of mystical experience, his later works took a focus on Polish history, including the drama Samuel Zborowski, which has been referred to as one of the boldest visionary dramas in world literature. This paper explores the relation of Juliusz Słowacki’s drama Samuel Zborowski to Darwinism and Surrealism. As a contemporary of Darwin, this paper presents several overlapping points in time between the lives of Słowacki and Darwin, as well as Słowacki’s relations to both Darwin and his predecessors. It has been argued that Samuel Zborowski is the first surrealistic work in Polish literature. It employs varied scenic tricks that can be termed surrealistic. The textual images of the work include several cinematographic special effects, and the subjects explored in Samuel Zborowski reflect a condensed, symbolic shorthand sign of cosmic experience and historiosophic meditation. At times impressionistic, the concepts therein are formulated by analogy, allusion and synthesis, with signs and images point to infinity. Taken together, we have a dramatic exposition of fundamental Genesis philosophy, interwoven and ultimately subordinate to the perennial Polish Question in the context of Romantic Messianism. The rich philosophical sources of Samuel Zborowski reveal a wealth of influences. The end result is a strange symbiosis of Poland’s national history, Słowacki’s messianistic historiosophy, and the scientific heritage of Darwin’s predecessors.

The object of this article is the comedy cinematography. The subject is the comedy cinematography as a manifestation of the culture of laughter. The author examines such aspects of the topic as the culture of laughter and the history of its conceptualization in the humanities knowledge, historical manifestations of the culture of laughter in different eras. Special attention is given to the idea that comedy film is a significant embodiment of the culture of laughter in modern art. The author analyzes comedy as genre of cinematography; substantiates the impact of comedy film upon society through the means of cinematography as an audiovisual art. The main conclusions of the conducted research consist in the determined functions of comedy film as a manifestation of the culture of laughter in the modern era;  an idea that comedy cinematography along with manifestations of the culture of laughter of the previous historical eras, forms a specific anti-cultural world that demonstrates an underside of the surrounding world , and mostly of the society. The author’s special contribution into this work lies in consideration of the comedy genre of cinematography within the concept of the culture of laughter, which allowed highlighting the new aspects of this phenomenon and substantiating its significance in the spiritual life of modern society. The novelty consists in application of the conceptual framework of the culture of laughter with regards to the analysis of comedy film, which views the phenomenon at hand from the universal worldview perspective.

In modern cinematography, alongside with consistent and traditional, distinct types of nonlinear drama are used. Many of these types were developed on the border line between the 1950s – 1960s, one of the most active periods of the renovation of the film language. In the history of cinematography the discovery of a number of new dramatic methods was made by film producers of the so-called author’s cinematography. G. N. Chukhray’s film «The Ballad of a Soldier» (1959) vividly shows a tendency towards a fragmentary «block» composition of the plot. And new, for that time, principles to organize action development were used. The article studies the peculiarities of the film drama of «The Ballad of a Soldier» and analyses the correlation of the plot, subject and composition in the film. At the same time in Russian contemporary art history there are very few special works devoted to the problems of the typology of the cinema drama of that period in the context of their influence on modern cinematography. It allows one to speak about the actuality of the article.

The author explores the problematic of the images of army and military in mass cinematography on the example of U.S. film industry of the second decade of the XXI century. The object of this research is the sociocultural representation of army and war via expressive means of cinematographic art. Within the Russian science, this problematic is poorly studied; at the same time, its relevance cannot be overestimated, since cinematography is an important component in formation of “soft power” of the country. According to the testimony of numerous Russian experts, namely cinematography of the United States has highest impact potential and forms mental images of the army and military not only among the U.S. citizens, but also for the Russian society, which always triggers questions related to the cultural aspects of national security. It is worth noting that modern U.S. military cinematography becomes the special subject of scientific research for the first time. The author comes to the conclusion that in the recent decade, U.S. film production in military genre has undergone substantial transformations. The films on the World War II and the Vietnam War are replaced with the films on global war on terrorism and local national conflicts. Among other peculiarities of recent years in U.S. military cinematography, the author notes female film directors in this sphere, personification of the images of enemy, deconstruction of the image of military man as a mythological defender and rescuer. The latter noticeably contradicts the Russian film tradition and culture, for which the army and military history remain the important points of national self-identity, key components of formation of images of the great past and common future.

The article analyzes cinema as a subject of sociological analysis. Approaches to the conceptualization of the term “cinema” are considered, their specificity is revealed. Cinematography is presented as an art form, mass media and communication, a social institution, and an industry of the economy. The functions and role of cinema in society are highlighted.Particular attention is paid to the features of modern cinematography, among which there are three main ones – the globalization of cinematography, the change in the model of film production and the serialization of cinematography. The positive and negative social consequences of the process of globalization in the field of cinema are highlighted. It is emphasized that the state, which can regulate and control the process of distribution of film products, acquires a special role in the era of globalization. The inequality in the field of film production is analyzed.The article presents the characteristics of the modern film production model associated with a high level of competition in the film industry, as well as control in the field of protection of intellectual property rights. In modern cinema, it is common to expand storylines and create prequels, sequels, and crossovers. The reasons for this process are described, such as commercialization, unwillingness to take risks, focus on the mass consumer, and others. Serialization is considered as the third significant feature of modern cinema. The history of serialization, its main stages and their characteristics are presented. In conclusion, potential trajectories for the development of modern cinema are presented.

The article is devoted to the image of democracy in US cinematography through the theme of Vietnam war. Special attention is paid to the phases of the image development proposed by Jean Baudrillard. The author made the conclusion that the image of democracy in American cinema offers a distorted model of US intervention, in which the images of the aggressor and the victims replace each other, as well as the concept of democracy, which does not allow the fact of lawlessness and violation of the rights of citizens of any nationality or country.

Abstract Mr. Robot is an American television series that conveys the alienating effects of technology through unusual composition patterns. These patterns do not constitute mere coatings but manifestations of embodied metaphors that serve as emotion markers, redundant elements to maintain the mood. The viewers are led to share the character’s emotions, due to perceptual and sensory-motor experiences that are activated through the metaphoric mise-en-scène. The unorthodox framing also appears to affect the attentional synchrony, helping to immerse viewers in the obscure fictional world. All in all, the cinematography seems to facilitate the connection between the minds of fictional characters and viewers through bodily experiences.

In the article the author examines certain aspects of Peter the Great’s image concept in Soviet time. The author pays special attention to the attitude of Marxism-Leninism ideology (that was principle in the USSR) founders towards Peter I and to the interpretation of his image in the Soviet culture, especially in literature and cinematography. The author notes that Peter the Great was one of the few Russian tsars who were officially considered positive characters in Russian history.

The object of the research in the article is a comparative analysis of the visual language of three­dimensional types of stop­motion and computer 3D animation, which actively influences the creation of images of screen culture. The authors note that the visual effects of volumetric stop­motion animation are a kind of proto­form of 3D computer animation, which has been actively used in the creation of special effects in cinema in recent decades. Relying on the methods of cultural­historical and semiotic analysis, the authors consider the evolution of the visual language of animation, which has gone its way from the traditions of hand­drawn and puppet animation to multifunctional computer animation techniques that contribute to the formation of multidimensional images of modern screen culture.

Thesis (Ph. D.)--Georgia State University, 2006.
Title from file title page. Ted Friedman, committee chair; Kathy Fuller-Seeley, Angelo Restivo, Jung-Bong Choi, Alisa Perren, committee members. Electronic text (249 p.) : digital, PDF file. Description based on contents viewed Oct. 29, 2007. Includes bibliographical references (p. 236-249).

This thesis explores techniques for synthesizing crowds from imagery. Synthetic photorealistic crowds are desirable for cinematic gaming, special effects and architectural visualization. While motion captured-based techniques for the animation and control of crowds have been well-studied in computer graphics, the resulting control rig sequences require a laborious model-based graphics pipeline to render photorealistic videos of crowds. Over the past ten years, data-driven techniques for rendering imagery of complex phenomena have become a popular alternative to model-based graphics. This popularity is due in large part to difficulties in constructing the sufficiently-detailed models that are required to achieve photorealism. A dynamic crowd of humans is an extremely challenging example of such phenomena. Example-based synthesis methods such as video textures are an appealing alternative, but current techniques are unable to handle new challenges posed by crowds. This thesis describes how to synthesize video-based crowds by explicitly segmenting pedestrians from input videos of natural crowds and optimally placing them into an output video while satisfying environmental constraints imposed by the scene. There are three key challenges. First, the crowd layout of segmented videos must satisfy constraints imposed by environmental and crowd obstacles. This thesis addresses four types of environmental constraints: (a) ground planes in the scene which are valid for crowd traversal, such as sidewalks, (b) spatial regions of these planes where crowds may enter and exit the scene, (c) static obstacles, such as mailboxes and walls of a building, and (d) dynamic obstacles such as individuals and groups of individuals. Second, pedestrians and groups of pedestrians should be segmented from the input video with no artifacts and minimal interaction time. This is challenging in real world scenes due to significant appearance changes while traveling through the scene. Third, segmented pedestrian videos may not have enough frames or the right shape to compose a path from an artist-defined entrance to exit. Plausible temporal transitions between segmented pedestrians are therefore needed but they are difficult to identify and synthesize due to complex self occlusions. We present a novel algorithm for composing video billboards, represented by crowd tubes, to form a crowd while avoiding collisions between static and dynamic obstacles. Crowd tubes are represented in the scene using a temporal sequence of circles planted in the calibrated ground plane. The approach consists of representing crowd tube samples and constraint violations with a conflict graph. The maximal independent set yields a dense crowd composition. We present a prototype system for the capture, analysis, synthesis and control of video-based crowds. Several results demonstrate the system's ability to generate videos of crowds which exhibit a variety of natural behaviors.

The purpose of this dissertation is to chart how the development of visual effects has changed popular cinema¡¯s vision of the real, producing the powerful reality effect. My investigation of the history of visual effects studies not only the industrial and economic context of visual effects, but also the aesthetic characteristics of the reality effect. In terms of methodology, this study employs a theoretical discourse which compares the parallels between visual effects and the discourse of modernity/postmodernity, utilizing close textual analysis to understand the symptomatic meanings of key texts. The transition in the techniques and meanings of creating visual effects reflects the cultural transformation from modernism to postmodernism. Visual effects have developed by adapting to the structural transformation of production systems and with the advance of technology. The studio system strongly controlled the classical Hollywood cinema by means of the modern economic production system of Fordism. Breakdown of Hollywood classicism as a production system gave rise to the creation of digital effects with the rise of the concept of the blockbuster and with the development of computer technologies. I argue that the characteristic feature of time-space compression, occurring in the process of the transition from Fordism to flexible accumulation, clearly reflects that of compression of multi-layered time and space, generated in the development process from analog visual effects, such as trick, rear and front projection, to the digital effects, such as rotoscoping and CGI animation. While the aesthetics of analog visual effects, without computing, can be compared to a Fordist production system, digital effects, which hugely rely on CGI manipulation, are examples of flexible accumulation. As a case study of the local resistance or alternative of Hollywood today, I examine the effects-oriented Korean nationalist blockbuster. The Korean nationalist blockbuster films have sought large-scale filmmaking and presentation of spectacular scenes, including heavy dependence on the use of special effects, which is frequently considered a Hollywood style. This paradoxical combination of peculiar Korean subjects and Hollywood style can be viewed as a form of cultural jujitsu, taking advantage of the force of the dominant culture in order to resist and subvert it.

The purpose of the current study is to add to existing research on the effectiveness of the SRSD RAP strategy on reading comprehension. This study describes a single-subject research design involving professional development in the RAP metacognitive strategy and a teacher’s implementation in her high-school history courses. The study aims to assess the strategy’s effectiveness in the high school general education setting with inclusive instruction and without pull out sessions to learn that strategy. The current study explores RAP strategy research and uses a week-long unit of instruction for teaching the RAP strategy. The results of the RAP strategy on the reading comprehension of high school students were found by using the scores of the reading comprehension probes.

An investigation of the effects of commercial mechanised selective logging on rain forest vegetation and mammals, was undertaken in the Lope Reserve, central Gabon, between January 1989 to July 1991. Vegetation in Lope is mostly semi-evergreen lowland tropical rain forest, but there are some localised patches of savanna., which are thought to be natural in origin, but which are maintained today by regular fires started by humans. Study sites were established in areas of forest logged 20-25, 10-15, and 3-5 years previously, a fourth was logged during the study, and a fifth remained unexploited. None of the study sites had been subject to hunting in the recent past. A line-transect five kilometres in length was cut across the drainage in each site. Forest composition and structure was assessed along each transect, by identifying and measuring trees and lianes in botanical plots, counting stem density of herbaceous vegetation in the families Marantaceae and Zingiberaceae, and by measuring canopy cover at three heights. At total of 4885 trees and lianes of 327 species occurred in five 2.5 ha samples of plants greater than 10 cm dbh, whilst 1832 individuals of 137 species were found in five 25ha samples of trees greater than 70cm dbh. There were marked differences in structure and species composition both between and within sites. A model was developed to attempt to explain this variation, based upon the theory that much of Lope had been covered by savanna vegetation during a previous cool, dry climatic phase, and that forest structure and composition reflected recolonisation of the savanna by forest. Physical features such as swamps, rocky outcrops and altitude were also considered. Two types of multivariate analysis were applied to botanical data and supported the model. The effects of logging on forest vegetation were assessed by returning after logging to botanical plots established before exploitation. Damage levels were low, compared to other parts of the World, resulting in about a 10% reduction in canopy cover. Patterns of fruit production were studied by counting fallen ripe and unripe fruit on transects. Fruits encountered were classified on the basis of their morphology and dispersal mechanism. There was a period of low fruit production during the major dry season, when frugivores are likely to suffer dietary stress. A number of plant species which did produce fruit at this time were identified as species which might represent 'keystone' resources. Over 70% of fruit species were animal-dispersed, demonstrating the the important role animals play in the ecology of tropical rain forests. Forest elephant (Loxodonta africana cyclotis) diet, ecological role and group structure were analysed. The bulk of the diet consisted of the bark and leaves of trees, and some monocotyledons in the families Marantaceae and Zingiberaceae, but fruit was also important. Large-scale seasonal movements in response to fruit availability were detected. Elephants were important seed dispersers f o r many plant species, and were responsible for less than 1% of natural tree mortality. The social structure of these forest elephants differed from that of populations that have been studied i n east and southern Africa. Average group size was 2.8, and no groups of more than 10 individuals were encountered. Densi ties of primates, ungulates and squirrels were assessed using standard line-transect censuses. Resolution was poor, but statistical differences were detected between sites for some species. Chimpanzee, (Pan t. troglodytes) densities declined in logged forest, but no other species could be shown to decline after logging. Some other differences between sites were related to vegetation composition. Biomass was high, estimated a t up to 4692.6 kg km-2, but was dominated by elephants, which made up 25-82%. Conservation implications of this study are discussed, and recommendations made.

AbstractThe conclusion to Animating Unpredictable Effects argues for the importance of understanding engineering and R&D as a part of animation and visual effects production, in opposition to critics who dismiss these as mere tools for hyperrealism. This provides for a better understanding of a diverse range of contemporary digital media production practices that involve extensive technical work, but it also sheds light on film production practices going back a century. Using the example of practical special effects, like puffs of smoke or splashing waves in a studio water tank, which create unpredictable motion under artificial conditions, the conclusion draws a long history of practices that represent the world by making artificial mechanisms rather than capturing or drawing images.

“Special effects” is not simply an addition to the cinema system; it is integral to cinema. The fundamental concept involves the mechanical nature of cinematography, the phenomenology of the experience of film, and the implications for theories of film and theories of animation. The history of explosions as an effect is considered. The essay explores the heuristics of the “naught,” the “space between frames,” and the “interval” in the magic performances of Georges Méliès, the editing of Edwin S. Porter, and the writings of Henri Bergson, Sergei Eisenstein, Dziga Vertov, and Norman McLaren.

Special camera effects such as superimpositions, by their absence in Dreyer’s Ordet as much as by their bold presence in Hitchcock’s The Wrong Man, crystallize the chemical constitution, as it were, of film, making it clear that in its molecular makeup and in varying ratios, cinema binds realism to magic, evidence to illusion, and document to poetry. There must be a ‘process’ by which the standard registration of straight cinematography is transcended by the apparent miracle achieved by the effect. A materialist approach to film history would calculate its evolution by tracing the improvements in both realism and effects realized progressively film after film, year after year. But an aesthetic attitude can discount this linear progression and see in a miraculous film like Ordet a throwback strategy that insinuates miracles by primitive techniques of lighting and sound. Comparing Ordet, The Wrong Man, and Bresson’s A Man Escaped, all made within a year of each other and all discussed by Bazin and Godard, one can recognize a spectrum of ‘faiths’ in the image and in art. Decades later, Godard’s Histoire(s) du Cinéma subsumes such films and the beliefs they engendered within a videographic essay where superimposition is omnipresent and not special at all.

The prominence of Georges Méliès in the history of cinema is indelibly linked to his use of the ‘substitution trick’, often described as a forebear of editing. Yet Méliès also exploited a different sort of trick, one stemming from ‘recreational photography’: multiple exposures with a black background. While the tricks achieved with this technique have received less attention, they are no less crucial for two reasons. First, the technique pertains to what, for many theorists, has been conceived as an essential feature of photographic and cinematographic images, namely their synchronicity, or the fact that, as Henri Van Lier put it, “whatever the exposure time and the moment of impact of each particular photon, the arrival of all, in the end, is dated by the arrival of the last one.” Secondly, Méliès’s use of the black background enables us today to reassess a distinction that digital cinema has undermined, namely that between editing and compositing.

Abstract The Longest Day (U.S., 1962) is one of my favorite historical films. I can still recall the sense of pride when I walked out of the theater in the fall of 1962 after seeing it for the first time. The Longest Day helps us visualize the scale and drama of the Allied invasion of Normandy on June 6, 1944, an invasion that marked the beginning of the end of Nazi control in Western Europe. This enormous three-hour film is one of the great epics about World War II. A true “blockbuster,” it powerfully re-created on a grand scale the largest amphibious invasion in history. The deployment of thousands of troops, a vast quantity of battle equipment, and the wizardry of exploding shells resulted in Academy Awards for cinematography and special effects.

Abstract The Korean War broke out on 25 June 1950. It was around the same time that the results of the Dodge Line of deflationary policies began to produce serious adverse effects on the Japanese economy. On 27 June, the UN Security Council, acting during a Soviet boycott, passed a US resolution calling for action by UN member nations to aid South Korea. On 30 June, US ground forces were ordered to Korea, and on 8 July General MacArthur was appointed to assume the unified UN command. MacArthur ordered the UN forces, comprised of troops from sixteen UN member nations, to counter-attack North Korean forces.

German silent cinema is famous for its unconventional aesthetics and film-technological innovations. These characteristics were the result of efforts to reconcile the new medium’s automatic reproductions of physical reality with idealist conceptions of art. Special effects played a crucial role in this endeavour. They afforded creative experiments with the cinematic apparatus and inspired filmmakers to convey ideas and emotions. Special effects embodied the “techno-romantic” project of construing technology as a means for transcending material reality. This common response to industrial modernity profoundly shaped German silent film culture. The techno-romantic paradigm formed the basis of one of the most creative periods in film history and proved instrumental in the evolution of cinematic expressivity and film art.

The first German film to excite art critics was simultaneously a milestone in the history of special effects. Der Student von Prag was co-created by some of Germany’s most ardent early cinephiles with the goal to demonstrate the feasibility of film art. Proceeding from techno-romantic assumptions, they construed artistic filmmaking as the articulation of ideas and feelings through the imaginative application of the medium’s technological assets, specifically location shots and trick effects. Consequently, Der Student von Prag depicts the intrusion of an uncanny doppelganger into a real-life setting, the mystical city of Prague. As a vehicle for abstract notions, the horrific double thus bore witness to cinema’s ability to convey figurative meaning and participate in the life of the mind.

<p>Wrocław in Poland and San Sebastian in Spain were awarded the title “European Capital of Culture 2016”. The project “Bridge Builders” was one of many events organised within the cultural programme organised under this patronage taking place in Wrocław in 2015. For one day 27 bridges were converted into theatre scenes, concert spaces and art studios. Visitors had an opportunity to experience cinematography, dance, theatre, literature, and spatial installations. The project “Bridge Builders” is presented in this paper in many of its offerings. A particular attention is given to the project “Zwierzyniecki Bridge Copy – Paste”. Within this project, a 1:4 scaled model of a steel arch bridge – Zwierzyniecki Bridge, was designed, constructed and taken on a journey around the city. The whole process of realization of this undertaking is presented, starting from the design specifications, through concept design, detail design and construction, to transport of the bridge model to its final destination. Selected technical challenges and their solutions are discussed, pertaining to material selection, load effects and construction.</p>

It is now well accepted that welded structures may contain flaws, and that these do not necessarily affect structural integrity or service performance. This is implicitly recognized by most welding fabrication codes that specify weld flaw tolerance, or acceptance, levels based on experience and workmanship practice. However, these levels are somewhat arbitrary and do not provide a quantitative measure of structural integrity, i.e. how “close” a particular structure containing a flaw is to the failure condition. This concept is of special interest in cases in which the pipe is subjected to loads that produce important deformations. In particular the reeling process, used to install offshore lines, produce large cyclic plastic deformation on the pipes. In this work the method to perform a structural reliability analysis (SRA) for a tube subject to reeling is considered in detail. A fracture mechanics based methodology is reviewed and the points that need to be resolved before extending the methods to include reeling are clearly identified. The effect of the strain history on the applied and material fracture mechanics parameters were studied. A theoretical model was developed to describe the crack driving force evolution through strain cycles. A criterion was proposed and corroborated to represent material fracture resistance behavior. An experimental program was carried out. The material analyzed was a X65 - tube 355.4 × 22.2 mm. Monotonic and cyclic fracture mechanic tests were performed on single edge notch in tension (SENT) specimens. The material fracture resistance curve was determined based on the monotonic tests. The cyclic tests were used to determine experimentally the applied fracture mechanic parameters evolution. A very good agreement between predicted and measured CTOD values was obtained for the cases analyzed. A methodology to perform a SRA for tube subjected to reeling is proposed.

This work provides a historical perspective of the developments of propulsion system inlet/engine integration. The flow physics of inlet distortion are discussed, along with the stability effects on the engine compression systems. Throughout the document, both commercial and military applications are considered. Developments in analyses from the original works characterizing inlet distortion, the use of distortion descriptors and early modeling concepts, and the modeling and simulation required today are reviewed. The special requirements and testing techniques necessary to adequately describe inlet distortion and the effects on the propulsion system are summarized. The aspects of pressure distortion, temperature distortion, and swirl are addressed and the physics of interaction described. The compression system response to different types of distortion is discussed with the interaction with various compression system components and designs explained. Axial and centrifugal compressors are covered, as the resulting physics of the inlet distortion effects on each has a different characteristic. An overview of the necessary flow physics to consider in the integration of compression systems in both low and high-Mach number applications is presented.

The response of a platform subjected to a strong ground motion is highly affected by the method of modelling, and special attention should be paid to such advanced analysis. While the potential of dynamic inelastic analysis and performance based design of offshore platforms is recognised in earthquake design and assessment, they have inherent shortcomings. This paper discusses the critical issues and their effects on the obtained results in the application of inelastic dynamic analysis. Areas of possible developments that would render the method more applicable to the prediction of dynamic response, and new developments towards a fully adaptive performance based design are explored. These developments lead to dynamic analysis results that are closer than ever to the true inelastic time-history behavior of the structures. It is concluded that there is great scope for improvements of this powerful technique that would increase confidence in its employment, and encourage its use during design as the primary tool for reliability assessment under seismic loads. The results from a sample project indicated that inelastic time history seismic analysis provides a more realistic assessment of structural behavior and strongly recommended to be implemented for the design and reliability assessment of the fixed offshore structure under extreme seismic event.

Large marine two-stroke diesel engines still represent the major propulsion system for merchant shipping. Withsteadily increasing transport demands, rising operational costs and stricter environmental legislations, the global marine shipping industry finds itself facing the challenge to future-proof its fleet. In order to comply with international maritime organizations emission standards (TIER II and TIER III), highly sophisticated and flexible combustion systems are demanded. With the help of spray and combustion research such systems can be developed and continuously improved. A highly valuable tool to investigate sprays of large marine diesel injectors under engine relevant conditions is the Spray Combustion Chamber (SCC). This paper reviews the history of the SCC, shows todays possibilities and looks into the near future of research involving large marine two-stroke engines. The SCC was built during the first Hercules project (I.P.-HERCULES, WP5, [1]). The initial setup focused on fundamental investigations comprising the application of highly flexible thermodynamic conditions. During follow-up projects (Hercules beta [2] and Hercules C [3]) the SCC was continuously developed, and a variety of influences on spray and combustion were experimentally assessed. The initial SCC design focused on maximum optical access as well as the applicability of a wide span of optical techniques. Single-hole nozzles were utilized to generate reference data to optimize existing spray and combustion simulation models. Different fuel types and fuel qualities were investigated and effects of the in-nozzle flow on spray morphology was identified. A sound set of results was achieved and published in several (internal and public) reports. Over the years, spray research at Winterthur Gas&amp; Diesel has turned its focus from basic spray investigations to more detailed cavitation and in-nozzle flow examinations [4], [5]. Future research on the SCC will focus on investigations of more engine related topics, as, for example, the application of a fuel flexible injection system as is currently developed in the HERCULES-2 project [6]. Significant design modifications of the initial setup were necessary, as the injector positions and therefore exposure of the spray relative to the swirl were not fully congruent with real engine conditions. As a consequence, the new setup includes some minor drawbacks, e.g. the optical access of the nozzle tip is only visible from one side of the chamber. This means that line-of-sight methods are currently only possible at selected positions in the centre of the chamber. Therefore, a new setup was installed to illuminate the spray, consisting of a high speed, high energy laser (100 kHz, 100 W) and special optics. In order to obtain enhanced optical access, tangential windows were re- arranged, now pointing directly at the nozzle. With this setup, a first set of images was realized, showing a realspray as it occurs in large marine two-stroke diesel engines.DOI: http://dx.doi.org/10.4995/ILASS2017.2017.4734

The topic of research in the shoah is full of skeletons in general, whether it is popular or Indian; A thousand, the results of each work differ from the history of the seven, as a change in the history of the work, because there will be a group of people that represents its basic mission that it is witnessing. As a curriculum in terms of a scientific study of the basics of utilitarian work, as well as a complete independence, to be a special work in the science of methods, the living thing differs from the other, the living is sufficient as a machine for the marriage of the privatized languages. Like Al-Hajji on the problem of the method in the Indian world, it is considered a reference to the history of the Great Depression, notwithstanding during the famine and its social effects, which constituted a prominent decade in the history of the Great Nineties, especially before the Shiza and Ba’ja. Refusal to scrutinize the emotional reactions of the group, such as overcoming the emergence of ideas, constitutes a mental obstacle to the psychological distress in the private sphere, as well as through the use of loud, practical emotions. Like a stinging bear, the Indian uncle was looking for a peculiar squabble of her own that belonged to the stinging stinger, like a humping bear, what he shouted at him in his book 'Al-Kawasat as Things', that the slandered in the nugget of al-Khunaj was like a jerk; Because it is a subject of disintegration, so that the uncleanness of the Indian uncle cannot live during the opening of the hole. Thus, the sigmoid form in the indica is suffocated, and it refers to the living lump of the lungs. It is sufficient for the vas deferens in the labors, and the resuscitation spurs in the normal labors of the newborn to the age of puberty. Introspective, and the second is to try to reveal the brain. Yeh; In both cases, the exclusions were different from the first case of the larval condition, and the course of the endosperm differed as a chicken in the presence of a wrinkled one, and in the second case, the exudate was transferred to the lesion of patches of any lobe, or a second gastrocnemius, or something like the extraction of a soybean

The effects of low velocity impact on woven composite panels are presented in this study. In the experimental program, 8 ply, 16 ply and 24 ply VARTM manufactured woven composite panels were subjected to low velocity impact loads. The laminates were held in a special fixture, which was designed to simulate simply supported boundaries. Impact experiments were conducted using a Dynatup low velocity impact testing machine where a drop-weight system was used to strike each panel at 90° incidence under controlled conditions of impact velocity. The impactor used was of a constant weight and tip diameter. The impact height and hence the velocity and energy were used as variables in the study. Preliminary impact tests were performed to establish the incipient damage (lower bound) and visible back face damage and spalling (upper bound) energy for each of the 8 ply (thin), 16 ply (moderately thick) and 24 ply (thick) woven graphite/epoxy laminates. Seven energy levels were selected to study the progressive deformation and damage mechanics. It is shown that threshold damage criteria can be established by using a simple FFT smoothening of impact load-time history data.

Pipeline operators, contractors and governments face important challenges when planning, designing, constructing and operating pipelines which connect the hydrocarbon reserves in the Amazonian basin with population and shipping centers on the Pacific coast. These pipelines cross portions of the Amazonian rainforest, the mountain rainforest along the eastern flank of the Andes, the Andean plateau, and the rural and urban low lying desert areas along the Pacific coast. The need for these pipelines will continue and offers a tremendous opportunity to promote sustainable economic development. However, there are several challenges in safeguarding the integrity of the pipeline, environment, local population, and socio-economic fabric of the region. Failure to properly address these risks could have significant financial, engineering, environmental and social, or reputational consequences for operators, contractors, financiers and governments. In this context, companies need to understand the specific challenges present and implement an encompassing project and risk management strategy that entails leadership, team work, effective communication and collaboration in a manner that proactively meets anticipated needs and responds to evolving conditions. During design and construction management, engineers and scientists are challenged by geology, topography, limited or no field data, limited access to the right-of-way (RoW), and socio-environmental aspects. Major training efforts are needed for the construction workforce, in a manner applicable to educational and cultural characteristics. Special road safety measures are required and in many instances the right-of-way will be the only means of transporting construction material. Other special logistical challenges are presented by the rich cultural history of the Andes. During operation, special consideration needs to be given to external natural hazards like landslides, soil creep, seismicity, and river scour. Management needs to maintain good communication with all parties affected by the project and proactively promote broad socio-economic development in the project area. The recognition of these specific challenges and upfront investment will facilitate mutually beneficial project advancement and be of particular benefit in instances of anticipatable but uncontrollable events. This paper describes several of these challenges and provides guidance on how to minimize project specific risks and adverse effects to society and environment.

This paper deals with the temperature rise due to material damping in rotating pultruded composite shafts. Pultrusion is a special fabrication process for manufacturing composite structural components whose cross section does not change along its length. Rotating shafts carrying gears or pulleys are examples. These shafts are subjected to side loads as they rotate. This causes them to bend back and forth in a cyclic manner. As a result, every element of the shaft generates heat due to material damping. The heat generation per cycle of motion is known for many materials and so a mathematical analysis is possible. Mathematical treatment of thermal problems involving pultruded composites can be simplified using two-dimensional Cartesian or Axisymmetric models. An explicit unsteady finite difference scheme with heat generation is used to study rotating shafts. The method is straightforward and capable of handling unsteady heat conduction in anisotropic components having single or multiple fiber types. The scheme can handle nonzero initial conditions and general convection type boundary conditions. Examples are used to illustrate the method and to investigate effects of the fiber-matrix thermal conductivity ratios, shaft rpm, and material damping on the temperature history in the material. The results show that, depending on the stiffness and thermal conductivity ratios in the principal directions, the temperature rise can be significant.

Over the past decade, several long-duration subduction earthquakes took place in different locations around the world, e.g., Chile in 2010, Japan in 2011, China in 2008, and Indonesia in 2004. Recent research has revealed that long-duration, large-magnitude earthquakes may occur along the Cascadia subduction zone of the Pacific Northwest Coast of the U.S. The duration of an earthquake often affects the response of structures. Current seismic design specifications mostly use response spectra to identify the hazard and do not consider duration effects. Thus, a comprehensive understanding of the effect of the duration of the ground motion on structural performance and its design implications is an important issue. The goal of this study was to investigate how the duration of an earthquake affects the structural response of special concentric braced frames (SCBFs). A comprehensive experimental program and detailed analytical investigations were conducted to understand and quantify the effect of duration on collapse capacity of SCBFs, with the goal of improving seismic design provisions by incorporating these effects. The experimental program included large-scale shake table tests, and the analytical program consisted of pre-test and post-test phases. The pre-test analysis phase performed a sensitivity analysis that used OpenSees models preliminarily calibrated against previous experimental results for different configuration of SCBFs. A tornado-diagram framework was used to rank the influence of the different modeling parameters, e.g., low-cycle fatigue, on the seismic response of SCBFs under short- and long-duration ground motions. Based on the results obtained from the experimental program, these models were revisited for further calibration and validation in the post-test analysis. The experimental program included three large-scale shake-table tests of identical single-story single-bay SCBF with a chevron-brace configuration tested under different ground motions. Two specimens were tested under a set of spectrally-matched short and long-duration ground motions. The third specimen was tested under another long-duration ground motion. All tests started with a 100% scale of the selected ground motions; testing continued with an ever-increasing ground-motion scale until failure occurred, e.g., until both braces ruptured. The shake table tests showed that the duration of the earthquake may lead to premature seismic failure or lower capacities, supporting the initiative to consider duration effects as part of the seismic design provisions. Identical frames failed at different displacements demands because of the damage accumulation associated with the earthquake duration, with about 40% reduction in the displacement capacity of the two specimens tested under long-duration earthquakes versus the short-duration one. Post-test analysis focused first on calibrating an OpenSees model to capture the experimental behavior of the test specimens. The calibration started by matching the initial stiffness and overall global response. Next, the low-cycle fatigue parameters were fine-tuned to properly capture the experimental local behavior, i.e., brace buckling and rupture. The post-test analysis showed that the input for the low-cycle fatigue models currently available in the literature does not reflect the observed experimental results. New values for the fatigue parameters are suggested herein based on the results of the three shake-table tests. The calibrated model was then used to conduct incremental dynamic analysis (IDA) using 44 pairs of spectrally-matched short- and long-duration ground motions. To compare the effect of the duration of ground motion, this analysis aimed at incorporating ground-motion variability for more generalized observations and developing collapse fragility curves using different intensity measures (IMs). The difference in the median fragility was found to be 45% in the drift capacity at failure and about 10% in the spectral acceleration (Sa). Using regression analysis, the obtained drift capacity from analysis was found to be reduced by about 8% on average for every additional 10 sec in the duration of the ground motion. The last stage of this study extended the calibrated model to SCBF archetype buildings to study the effect of the duration of ground motion on full-sized structures. Two buildings were studied: a three-story and nine-story build that resembled the original SAC buildings but were modified with SCBFs as lateral support system instead of moment resisting frames. Two planer frames were adopted from the two buildings and used for the analysis. The same 44 spectrally-matched pairs previously used in post-test analysis were used to conduct nonlinear time history analysis and study the effect of duration. All the ground motions were scaled to two hazard levels for the deterministic time history analysis: 10% exceedance in 50 years and 2% exceedance in 50 years. All analysis results were interpreted in a comparative way to isolate the effect of duration, which was the main variable in the ground-motion pairs. In general, the results showed that the analyzed SCBFs experienced higher drift values under the long-duration suite of ground motions, and, in turn, a larger percentage of fractured braces under long-duration cases. The archetype SCBFs analysis provided similar conclusions on duration effects as the experimental and numerical results on the single-story single-bay frame.

Banco de la República is celebrating its 100th anniversary in 2023. This is a very significant anniversary and one that provides an opportunity to highlight the contribution the Bank has made to the country’s development. Its track record as guarantor of monetary stability has established it as the one independent state institution that generates the greatest confidence among Colombians due to its transparency, management capabilities, and effective compliance with the central banking and cultural responsibilities entrusted to it by the Constitution and the Law. On a date as important as this, the Board of Directors of Banco de la República (BDBR) pays tribute to the generations of governors and officers whose commitment and dedication have contributed to the growth of this institution.1 Banco de la República’s mandate was confirmed in the National Constitutional Assembly of 1991 where the citizens had the opportunity to elect the seventy people who would have the task of drafting a new constitution. The leaders of the three political movements with the most votes were elected as chairs to the Assembly, and this tripartite presidency reflected the plurality and the need for consensus among the different political groups to move the reform forward. Among the issues considered, the National Constitutional Assembly gave special importance to monetary stability. That is why they decided to include central banking and to provide Banco de la República with the necessary autonomy to use the instruments for which they are responsible without interference from other authorities. The constituent members understood that ensuring price stability is a state duty and that the entity responsible for this task must be enshrined in the Constitution and have the technical capability and institutional autonomy necessary to adopt the decisions they deem appropriate to achieve this fundamental objective in coordination with the general economic policy. In particular, Article 373 established that “the State, through Banco de la República, shall ensure the maintenance of the purchasing power of the currency,” a provision that coincided with the central banking system adopted by countries that have been successful in controlling inflation. In 1999, in Ruling 481, the Constitutional Court stated that “the duty to maintain the purchasing power of the currency applies to not only the monetary, credit, and exchange authority, i.e., the Board of Banco de la República, but also those who have responsibilities in the formulation and implementation of the general economic policy of the country” and that “the basic constitutional purpose of Banco de la República is the protection of a sound currency. However, this authority must take the other economic objectives of state intervention such as full employment into consideration in their decisions since these functions must be coordinated with the general economic policy.” The reforms to Banco de la República agreed upon in the Constitutional Assembly of 1991 and in Act 31/1992 can be summarized in the following aspects: i) the Bank was assigned a specific mandate: to maintain the purchasing power of the currency in coordination with the general economic policy; ii) the BDBR was designatedas the monetary, foreign exchange, and credit authority; iii) the Bank and its Board of Directors were granted a significant degree of independence from the government; iv) the Bank was prohibited from granting credit to the private sector except in the case of the financial sector; v) established that in order to grant credit to the government, the unanimous vote of its Board of Directors was required except in the case of open market transactions; vi) determined that the legislature may, in no case, order credit quotas in favor of the State or individuals; vii) Congress was appointed, on behalf of society, as the main addressee of the Bank’s reporting exercise; and viii) the responsibility for inspection, surveillance, and control over Banco de la República was delegated to the President of the Republic. The members of the National Constitutional Assembly clearly understood that the benefits of low and stable inflation extend to the whole of society and contribute mto the smooth functioning of the economic system. Among the most important of these is that low inflation promotes the efficient use of productive resources by allowing relative prices to better guide the allocation of resources since this promotes economic growth and increases the welfare of the population. Likewise, low inflation reduces uncertainty about the expected return on investment and future asset prices. This increases the confidence of economic agents, facilitates long-term financing, and stimulates investment. Since the low-income population is unable to protect itself from inflation by diversifying its assets, and a high proportion of its income is concentrated in the purchase of food and other basic goods that are generally the most affected by inflationary shocks, low inflation avoids arbitrary redistribution of income and wealth.2 Moreover, low inflation facilitates wage negotiations, creates a good labor climate, and reduces the volatility of employment levels. Finally, low inflation helps to make the tax system more transparent and equitable by avoiding the distortions that inflation introduces into the value of assets and income that make up the tax base. From the monetary authority’s point of view, one of the most relevant benefits of low inflation is the credibility that economic agents acquire in inflation targeting, which turns it into an effective nominal anchor on price levels. Upon receiving its mandate, and using its autonomy, Banco de la República began to announce specific annual inflation targets as of 1992. Although the proposed inflation targets were not met precisely during this first stage, a downward trend in inflation was achieved that took it from 32.4% in 1990 to 16.7% in 1998. At that time, the exchange rate was kept within a band. This limited the effectiveness of monetary policy, which simultaneously sought to meet an inflation target and an exchange rate target. The Asian crisis spread to emerging economies and significantly affected the Colombian economy. The exchange rate came under strong pressure to depreciate as access to foreign financing was cut off under conditions of a high foreign imbalance. This, together with the lack of exchange rate flexibility, prevented a countercyclical monetary policy and led to a 4.2% contraction in GDP that year. In this context of economic slowdown, annual inflation fell to 9.2% at the end of 1999, thus falling below the 15% target set for that year. This episode fully revealed how costly it could be, in terms of economic activity, to have inflation and exchange rate targets simultaneously. Towards the end of 1999, Banco de la República announced the adoption of a new monetary policy regime called the Inflation Targeting Plan. This regime, known internationally as ‘Inflation Targeting,’ has been gaining increasing acceptance in developed countries, having been adopted in 1991 by New Zealand, Canada, and England, among others, and has achieved significant advances in the management of inflation without incurring costs in terms of economic activity. In Latin America, Brazil and Chile also adopted it in 1999. In the case of Colombia, the last remaining requirement to be fulfilled in order to adopt said policy was exchange rate flexibility. This was realized around September 1999, when the BDBR decided to abandon the exchange-rate bands to allow the exchange rate to be freely determined in the market.Consistent with the constitutional mandate, the fundamental objective of this new policy approach was “the achievement of an inflation target that contributes to maintaining output growth around its potential.”3 This potential capacity was understood as the GDP growth that the economy can obtain if it fully utilizes its productive resources. To meet this objective, monetary policy must of necessity play a countercyclical role in the economy. This is because when economic activity is below its potential and there are idle resources, the monetary authority can reduce the interest rate in the absence of inflationary pressure to stimulate the economy and, when output exceeds its potential capacity, raise it. This policy principle, which is immersed in the models for guiding the monetary policy stance, makes the following two objectives fully compatible in the medium term: meeting the inflation target and achieving a level of economic activity that is consistent with its productive capacity. To achieve this purpose, the inflation targeting system uses the money market interest rate (at which the central bank supplies primary liquidity to commercial banks) as the primary policy instrument. This replaced the quantity of money as an intermediate monetary policy target that Banco de la República, like several other central banks, had used for a long time. In the case of Colombia, the objective of the new monetary policy approach implied, in practical terms, that the recovery of the economy after the 1999 contraction should be achieved while complying with the decreasing inflation targets established by the BDBR. The accomplishment of this purpose was remarkable. In the first half of the first decade of the 2000s, economic activity recovered significantly and reached a growth rate of 6.8% in 2006. Meanwhile, inflation gradually declined in line with inflation targets. That was how the inflation rate went from 9.2% in 1999 to 4.5% in 2006, thus meeting the inflation target established for that year while GDP reached its potential level. After this balance was achieved in 2006, inflation rebounded to 5.7% in 2007, above the 4.0% target for that year due to the fact that the 7.5% GDP growth exceeded the potential capacity of the economy.4 After proving the effectiveness of the inflation targeting system in its first years of operation, this policy regime continued to consolidate as the BDBR and the technical staff gained experience in its management and state-of-the-art economic models were incorporated to diagnose the present and future state of the economy and to assess the persistence of inflation deviations and expectations with respect to the inflation target. Beginning in 2010, the BDBR established the long-term 3.0% annual inflation target, which remains in effect today. Lower inflation has contributed to making the macroeconomic environment more stable, and this has favored sustained economic growth, financial stability, capital market development, and the functioning of payment systems. As a result, reductions in the inflationary risk premia and lower TES and credit interest rates were achieved. At the same time, the duration of public domestic debt increased significantly going from 2.27 years in December 2002 to 5.86 years in December 2022, and financial deepening, measured as the level of the portfolio as a percentage of GDP, went from around 20% in the mid-1990s to values above 45% in recent years in a healthy context for credit institutions.Having been granted autonomy by the Constitution to fulfill the mandate of preserving the purchasing power of the currency, the tangible achievements made by Banco de la República in managing inflation together with the significant benefits derived from the process of bringing inflation to its long-term target, make the BDBR’s current challenge to return inflation to the 3.0% target even more demanding and pressing. As is well known, starting in 2021, and especially in 2022, inflation in Colombia once again became a serious economic problem with high welfare costs. The inflationary phenomenon has not been exclusive to Colombia and many other developed and emerging countries have seen their inflation rates move away from the targets proposed by their central banks.5 The reasons for this phenomenon have been analyzed in recent Reports to Congress, and this new edition delves deeper into the subject with updated information. The solid institutional and technical base that supports the inflation targeting approach under which the monetary policy strategy operates gives the BDBR the necessary elements to face this difficult challenge with confidence. In this regard, the BDBR reiterated its commitment to the 3.0% inflation target in its November 25 communiqué and expects it to be reached by the end of 2024.6 Monetary policy will continue to focus on meeting this objective while ensuring the sustainability of economic activity, as mandated by the Constitution. Analyst surveys done in March showed a significant increase (from 32.3% in January to 48.5% in March) in the percentage of responses placing inflation expectations two years or more ahead in a range between 3.0% and 4.0%. This is a clear indication of the recovery of credibility in the medium-term inflation target and is consistent with the BDBR’s announcement made in November 2022. The moderation of the upward trend in inflation seen in January, and especially in February, will help to reinforce this revision of inflation expectations and will help to meet the proposed targets. After reaching 5.6% at the end of 2021, inflation maintained an upward trend throughout 2022 due to inflationary pressures from both external sources, associated with the aftermath of the pandemic and the consequences of the war in Ukraine, and domestic sources, resulting from: strengthening of local demand; price indexation processes stimulated by the increase in inflation expectations; the impact on food production caused by the mid-2021 strike; and the pass-through of depreciation to prices. The 10% increase in the minimum wage in 2021 and the 16% increase in 2022, both of which exceeded the actual inflation and the increase in productivity, accentuated the indexation processes by establishing a high nominal adjustment benchmark. Thus, total inflation went to 13.1% by the end of 2022. The annual change in food prices, which went from 17.2% to 27.8% between those two years, was the most influential factor in the surge in the Consumer Price Index (CPI). Another segment that contributed significantly to price increases was regulated products, which saw the annual change go from 7.1% in December 2021 to 11.8% by the end of 2022. The measure of core inflation excluding food and regulated items, in turn, went from 2.5% to 9.5% between the end of 2021 and the end of 2022. The substantial increase in core inflation shows that inflationary pressure has spread to most of the items in the household basket, which is characteristic of inflationary processes with generalized price indexation as is the case in Colombia. Monetary policy began to react early to this inflationary pressure. Thus, starting with its September 2021 session, the BDBR began a progressive change in the monetary policy stance moving away from the historical low of a 1.75% policy rate that had intended to stimulate the recovery of the economy. This adjustment process continued without interruption throughout 2022 and into the beginning of 2023 when the monetary policy rate reached 12.75% last January, thus accumulating an increase of 11 percentage points (pp). The public and the markets have been surprised that inflation continued to rise despite significant interest rate increases. However, as the BDBR has explained in its various communiqués, monetary policy works with a lag. Just as in 2022 economic activity recovered to a level above the pre-pandemic level, driven, along with other factors, by the monetary stimulus granted during the pandemic period and subsequent months, so too the effects of the current restrictive monetary policy will gradually take effect. This will allow us to expect the inflation rate to converge to 3.0% by the end of 2024 as is the BDBR’s purpose.Inflation results for January and February of this year showed declining marginal increases (13 bp and 3 bp respectively) compared to the change seen in December (59 bp). This suggests that a turning point in the inflation trend is approaching. In other Latin American countries such as Chile, Brazil, Perú, and Mexico, inflation has peaked and has begun to decline slowly, albeit with some ups and downs. It is to be expected that a similar process will take place in Colombia in the coming months. The expected decline in inflation in 2023 will be due, along with other factors, to lower cost pressure from abroad as a result of the gradual normalization of supply chains, the overcoming of supply shocks caused by the weather, and road blockades in previous years. This will be reflected in lower adjustments in food prices, as has already been seen in the first two months of the year and, of course, the lagged effect of monetary policy. The process of inflation convergence to the target will be gradual and will extend beyond 2023. This process will be facilitated if devaluation pressure is reversed. To this end, it is essential to continue consolidating fiscal sustainability and avoid messages on different public policy fronts that generate uncertainty and distrust. 1 This Report to Congress includes Box 1, which summarizes the trajectory of Banco de la República over the past 100 years. In addition, under the Bank’s auspices, several books that delve into various aspects of the history of this institution have been published in recent years. See, for example: Historia del Banco de la República 1923-2015; Tres banqueros centrales; Junta Directiva del Banco de la República: grandes episodios en 30 años de historia; Banco de la República: 90 años de la banca central en Colombia. 2 This is why lower inflation has been reflected in a reduction of income inequality as measured by the Gini coefficient that went from 58.7 in 1998 to 51.3 in the year prior to the pandemic. 3 See Gómez Javier, Uribe José Darío, Vargas Hernando (2002). “The Implementation of Inflation Targeting in Colombia”. Borradores de Economía, No. 202, March, available at: https://repositorio.banrep.gov.co/handle/20.500.12134/5220 4 See López-Enciso Enrique A.; Vargas-Herrera Hernando and Rodríguez-Niño Norberto (2016). “The inflation targeting strategy in Colombia. An historical view.” Borradores de Economía, No. 952. https://repositorio.banrep.gov.co/handle/20.500.12134/6263 5 According to the IMF, the percentage change in consumer prices between 2021 and 2022 went from 3.1% to 7.3% for advanced economies, and from 5.9% to 9.9% for emerging market and developing economies. 6 https://www.banrep.gov.co/es/noticias/junta-directiva-banco-republica-reitera-meta-inflacion-3